| intestinal transport of monosaccharides and amino acids during postnatal development of mink. | intestinal development is typically studied using omnivores. for comparative purposes, we examined an altricial carnivore, the mink (mustela vison). in mink, intestinal dimensions increase up to 8 wk after birth and then remain constant (length) or decrease (mass) into maturity despite continuing gains in body mass. rates of glucose and fructose transport decline after birth for intact tissues but increase for brush-border membrane vesicles (bbmv). rates of absorption for five amino acids that a ... | 2000 | 11080097 |
| observations on thermoregulatory ontogeny of mink (mustela vison). | (1) we measured cooling rate for neonatal mink during a 10min coldroom (3.9 degrees c) exposure and subsequent warming rate during a 20min incubator (37.2 degrees c) exposure, the behaviour of the kits and the changes in their pelage between 1 and 46d of age, in an attempt to monitor the ontogeny of their thermoregulatory capacity. (2) body weight of the 1d old kits averaged only 12.8+/-2.3g (n=4), but they gained weight rapidly reaching 226.1+/-28.3g (males, n=4) and 207.6+/-16.1g (females, n=4 ... | 2001 | 11070339 |
| biochemical and morphological diversity among folliculo-stellate cells of the mink (mustela vison) anterior pituitary. | the folliculo-stellate (fs) cells are agranular cells of the anterior pituitary whose origin and function are still a matter of debate. this study examined the presence, topography, and morphological characteristics of fs cells in the mink anterior pituitary throughout the annual reproductive cycle. the s-100 protein was used as a fs cell marker. immunoperoxidase labeling on tissue sections demonstrated the presence of two types of s-100 positive cells. type 1 cells were stellate-shaped cells wh ... | 2000 | 11042013 |
| proliferation of maxillary and mandibular periodontal squamous cells in mink fed 3,3',4,4',5-pentachlorobiphenyl (pcb 126). | this report characterizes squamous cell proliferation in young farm mink (mustela vison) fed a diet supplemented with 0.024 ppm 3,3',4,4',5-pentachlorobiphenyl (polychlorinated biphenyl [pcb] congener 126). one to 2 months of dietary exposure to pcb 126 resulted in gross lesions of the upper and lower jaws consisting of mandibular and maxillary nodular proliferation of the gingiva and loose teeth. the maxilla and mandible of the pcb-treated mink were markedly porous because of loss of alveolar b ... | 2000 | 11021441 |
| reaction of farmed mink (mustela vision) to argon-induced hypoxia. | | 2016 | 10972113 |
| lh release in mink (mustela vison). pattern of the lh surge and effect of metabolic status. | the mink is a seasonal breeder with induced ovulation and delayed implantation. reproductive processes are strongly influenced by energy supply and body condition. items for which there is paucity or complete lack of data were the main objectives of this study: the temporal relationship between copulation and the pre-ovulatory lh surge and the influence of energy supply on lh release. a total of 30 yearling female mink with a well defined metabolic status was used. twelve females kept in the lab ... | 2013 | 10943603 |
| body composition in mink (mustela vison) kits during 21-42 days postpartum using estimates of hydrogen isotope dilution and direct carcass analysis. | we compared carcass analysis and hydrogen isotope dilution methods to measure total body water (tbw) and body composition in a small altricial carnivore, the mink. dilution space (d) of mink at 21-42 days of age (n=20), was determined after subcutaneous administration of tritiated water. the same animals were then used to determine tbw and body composition by carcass analysis and to derive predictive empirical relationships between tbw and total body fat, protein and energy. a separate validatio ... | 2000 | 10936769 |
| [effect of selection for behavior on the cranial traits of the american mink (mustela vison)]. | cranial sizes of american mink selected for tame and aggressive behavior (towards humans) and control mink, which were not selected for behavior, were compared. absolute sizes of the skull were demonstrated to change depending on the direction of selection. sexual dimorphism was reduced in mink selected for aggressive behavior, because the cranial sizes of females increased and those of males decreased. cranial traits were analyzed by the method of principal components. the groups studied differ ... | 2000 | 10923265 |
| plasma beta-endorphin concentrations during natural and artificially induced winter hair growth in mink (mustela vison). | | 1999 | 10816683 |
| feeding growing mink (mustela vison) pcb aroclor 1254 does not affect baculum (os-penis) development. | | 2000 | 10757671 |
| folliculogenesis, onset of puberty and fecundity of mink (mustela vision schreb) selectively bred for docility or aggressiveness. | it has been suggested that selective breeding of animals for docile behavior is correlated with early onset of puberty and improved fertility. we wished to test the hypothesis that mink bred for docility would show earlier onset of puberty and greater fecundity than mink bred for aggressiveness. we used farm-raised, 7-mo-old mink females that had been selectively bred for 7 to 10 generations on the basis of behavior towards humans. onset of puberty was estimated once (between 15 and 20 december) ... | 1998 | 10732018 |
| mastitis in the lactating mink female (mustela vison s.) and the development of "greasy kits". | "greasy kits" is the result of a multifactorial disease complex with few known definitive aetiological factors. mastitis has been hypothesized as a triggering factor although classical clinical signs of mastitis (rubor, tumor, dolor, calor) are rarely seen in lactating danish mink females. in this study we sacrificed 2 groups of lactating mink females with a total of 78 mammary glands at day 19-30 after giving birth. the first group had raised normal mink kits while the other group had suffered ... | 2000 | 11126574 |
| testicular mitosis, meiosis and apoptosis in mink (mustela vison) during breeding and non-breeding seasons. | testes of mink were compared between the breeding (march) and non-breeding seasons with the start (november) and cessation (may) of spermatogenic activity. testicular mass and spermatozoa per gram testis were assessed. percentages of haploid (1c), diploid (2c) and tetraploid (4c) cells were monitored using dna flow cytometry and the proportions of somatic and spermatogenetic cells were determined after selective labelling of somatic cells with a vimentin antibody. apoptosis was examined by cell ... | 1999 | 10610042 |
| [pleiotropic effect of the black crystal mutation on reproductive indicators in the american mink (mustela vison)]. | the parameters of reproduction were studied in american minks that were homo- and heterozygous for the black crystal mutation (cr). the given mutation that changes the hair pigmentation was obtained de novo duration selection of american minks for tame behavior. apart from changed color, the following reproduction disorders were detected in the black crystal mutants, as compared to standard animals: (1) delayed entry into the reproductive season in females; (2) greater percentage in both homo- a ... | 1999 | 10505266 |
| [changes in sizes and forms of the american mink (mustela vison) skull bred for tame and aggressive types of behavior]. | | 1999 | 10505255 |
| role of prolactin in regulating the onset of winter fur growth in mink (mustela vison): a reconsideration. | the objectives of this study were to determine: (1) if the onset of winter hair growth (anagen) in mink could be delayed or inhibited by elevating endogenous prl concentrations; (2) if bilaterally adrenalectomy (adx)-induced winter anagen occurs concomitantly with a reduction in serum prl concentrations, and (3) if exogenous dehydroepiandrosterone (dhea), an adrenal steroid or delta(5)-diol (a peripherally produced metabolite of dhea), would delay or inhibit the onset of winter anagen. during ea ... | 1999 | 10451421 |
| effects of formalin on bacterial growth in mink feed, feed consumption and reproductive performance of adult mink, and growth of mink kits. | feed that is typically used on commercial mink ranches is an ideal environment for bacterial growth because of the raw animal by-products used as ingredients. recently, formaldehyde was approved for use as an antimicrobial agent in poultry feed. experiments in our laboratory were carried out to investigate the effects of incorporating different concentrations of formalin into the feed of mink on the growth of gram-negative and gram-positive bacteria. feed containing 0, 550 or 1100 ppm formalin w ... | 1999 | 10434376 |
| changes in estrogen receptor expression and cell activity of lactotropes in female mink (mustela vison) pituitary in response to variations in the gonadal steroid environment. | this study was undertaken to get new information on the role played by estrogen (e) on the activity of mink lactotropes. immunocytochemistry for estrogen receptor (er) and prolactin (prl) was applied to assess modifications in the protein production that occur as a result of in vivo changes in the gonadal steroid environment. variations in the functional activity of lactotropes were demonstrated from the ultrastructural characteristics and morphometric parameters (cellular area, numerical densit ... | 1999 | 10336824 |
| water intake and excretion, urinary solute excretion and some stress indicators in mink (mustela vison): effect of ambient temperature and quantitative water supply to lactating females. | lactation is a physiologically demanding period in mink production, during which kit and dam losses may occur. ambient temperature and quantitative water supply are thought to affect animal performance and well-being, but conclusive data in the literature are sparse. therefore, effects of ambient temperature (ta; low, about 5 degrees; medium, about 15 degrees; high, average 20-25 degrees) and water supply (ad libitum (n), or 10% extra supplementation in the food (e)) were investigated regarding ... | 1998 | 10211054 |
| fatty acid alterations caused by pcbs (aroclor 1242) and copper in adipose tissue around lymph nodes of mink. | fatty acid composition was determined in adipose tissue surrounding the mesenteric lymph nodes of mink (mustela vison) exposed to polychlorinated biphenyls (pcbs: 1 mg aroclor 1242 in food day-1 for 28 days) and/or copper (62 mg kg-1 food). these specific adipose tissues are known to have functional relationships with lymphocytes, and proliferation of cultured lymphocytes is influenced by the quality of fatty acids available in media. in six experimental groups the diet was based on freshwater f ... | 1999 | 10190027 |
| long-term exposure of hypothalamic explants to melatonin alters the release of gonadotrophin releasing hormone and the density of melatonin binding sites in the pars tuberalis of the male mink (mustela vison). | to investigate the action of melatonin on the reproductive system, the effect of prolonged versus short-term exposure to melatonin on the release of gonadotrophin releasing hormone (gnrh) was examined in hypothalamic explants of male mink sacrificed in july, september or november. mediobasal hypothalamic (mbh) explants including the pars tuberalis (pt) were incubated for 1 night with or without melatonin (10(-8) m) for 8 hr or 16 hr and the release of gnrh was then measured. the next day, the ex ... | 1999 | 10102756 |
| serum prolactin and dehydroepiandrosterone concentrations during the summer and winter hair growth cycles of mink (mustela vison). | we investigated the relationship between serum concentrations of prolactin (prl) and dehydroepiandrosterone (dhea) during initiation and development of summer and winter hair growth (anagen) cycles in mink. in the spring, haloperidol (hal) increased prl concentrations and induced summer anagen earlier than controls, whereas melatonin (mel) inhibited prl secretion and completely blocked summer anagen. in the fall, hal increased prl concentrations, inducing anagen at an earlier time than controls, ... | 1998 | 9972323 |
| reproductive performance of two generations of female semidomesticated mink fed diets containing organic mercury contaminated freshwater fish. | semidomesticated female mink (mustela vison) were fed daily diets containing 0.1 ppm, 0.5 ppm, and 1.0 ppm of total mercury. piscivorous and nonpiscivorous fish naturally contaminated with organic mercury were used to prepare the diets. twenty-month-old females (g1 generation) that were exposed to the experimental diets for approximately 400 days in 1994 and 1995 and their 10-month-old female offspring (g2 generation) that were exposed to mercury for approximately 300 days in 1995, were all mate ... | 1999 | 9888969 |
| two polymorphic mink (mustela vison) dinucleotide repeat loci. | | 1998 | 9883524 |
| a polymorphic mink (mustela vison) dinucleotide repeat. | | 1998 | 9883521 |
| direct measurements of daily milk intake in suckling mink (mustela vison) kits. | | 1998 | 9868221 |
| energy metabolism, nutrient oxidation and water turnover in the lactating mink (mustela vison). | | 1998 | 9868219 |
| the accessory olfactory bulb of the mink, mustela vison: a morphological and lectin histochemical study. | the distribution of binding sites for the lectins ulex europaeus agglutinin i, soybean agglutinin, bandeiraea simplicifolia agglutinin i-isolectin b4, and vicia villosa agglutinin in the mink olfactory bulb was investigated. all lectins except ulex europaeus agglutinin i bound exclusively and systematically to a single area of the olfactory bulb. this area corresponded to that in which the vomeronasal nerves terminate, indicating that it is the accessory olfactory bulb, as confirmed by microdiss ... | 1998 | 9818447 |
| determination of the aversion of farmed mink (mustela vison) to carbon dioxide. | high concentrations of carbon dioxide are commonly used to kill mink before their pelts are removed. the aversiveness of this procedure was investigated by using a passive avoidance technique. eight mink were trained to obtain a reward (a novel object) by entering a chamber which could be filled with carbon dioxide, as under commercial conditions (over 80 per cent by volume). in the absence of carbon dioxide, mink entered the chamber within a mean (sd) of 16 (2.1) seconds and spent 45 (12) per c ... | 1998 | 9800303 |
| daily milk intake and body water turnover in suckling mink (mustela vison) kits. | daily (24 h) milk intake and body water turnover were measured in eight litters of suckling mink (mustela vison) kits (6-9 kits litter-1) during weeks 1-4 post partum using the tritiated water (3hho) dilution technique. the biological half-life of body water turnover in the mink kits increased linearly from 0.9 days in week 1 (3-5 days post partum) to 1.9 days in week 4 (22-24 days post partum). the daily milk intake varied markedly among the mink kits within a litter and increased significantly ... | 1998 | 9773486 |
| polychlorinated biphenyl (pcb) exposure produces placental vascular and trophoblastic lesions in the mink (mustela vison): a light and electron microscopic study. | polychlorinated biphenyls (pcbs) cross the placenta and cause fetal death in mink. no indications of impaired implantation have been reported. to study the effects of pcb on mink placental morphology, 2 groups each of 10 animals were orally exposed to clophen a50 at 0.65 mg (low dose) and 1.3 mg (high dose) per day for 54 days, starting before mating, with 10 control animals. placentae from mid to late gestation were examined by light and electron microscopy. in the controls, 11% of placentae we ... | 1998 | 9744765 |
| luteotropic hormone receptors in the ovary of the mink (mustela vison) during delayed implantation and early-postimplantation gestation. | the reproductive cycle of the mink displays rigid seasonality and obligate embryonic diapause. after ovulation, the corpus luteum (cl) involutes, and it secretes basal progesterone until activated prior to implantation. to study changes in the relative abundance of luteal prolactin and lh receptor mrna through gestation, ovaries and serum were collected from pregnant female mink at 2-day intervals (n = 3 per date) through embryonic diapause and cl activation (march 19-31) and at 5-day intervals ... | 1998 | 9716555 |
| reproductive effects in mink (mustela vison) exposed to the pesticides lindane, carbofuran and pentachlorophenol in a multigeneration study. | the mammalian reproductive system is sensitive to exposure to endocrine disrupting chemicals, particularly during sexual maturation. the purpose of this study was to examine reproductive function in second and third generation male and female mink exposed to pesticides from conception to maturity. the mink were fed untreated feed or feed treated with lindane (1 mg kg-1 day-1), carbofuran (0.05 mg kg-1 day-1) or pentachlorophenol (1 mg kg-1 day-1) from the time they were weaned. the second genera ... | 1998 | 9713382 |
| three polymorphic mink, mustela vison, dinucleotide repeats. | | 1998 | 9699284 |
| giant-cell osteosarcoma in a female ranch mink (mustela vision). | | 1998 | 9683086 |
| effects of dietary exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin in adult female mink (mustela vison). | adult female mink were fed diets supplemented with 0, 0.001, 0.01, 0.1, 1, 10, or 100 ppb 2,3,7,8-tetrachlorodibenzo-p-dioxin (tcdd) for up to 125 days. there was a dose-dependent decrease in feed consumption and body weights indicative of the "wasting syndrome" previously reported for mink and other species exposed to chlorinated hydrocarbon compounds. mortality reached 12.5, 62.5, and 100% by day 28 in the 1-, 10-, and 100-ppb groups, respectively, and by day 125, mortality increased to 62.5 a ... | 1998 | 9680528 |
| expression of the insulin-like growth factor ii gene in polychlorinated biphenyl exposed female mink (mustela vison) and their fetuses. | to study how polychlorinated biphenyls (pcbs) affect fetal growth and the expression of the insulin-like growth factor (igf ii) gene in the mink (mustela vision). | 1998 | 9624420 |
| influence of different planes of energy supply prior to the breeding season on blood metabolites in female mink (mustela vison). | metabolic blood profiles were studied in a total of 30 female mink (mustela vison) at different planes of nutrition prior to the breeding season in a control (con; n = 10), a flushed (flush; n = 10) and a negative energy balance group (neg; n = 10). the animals were kept in metabolism cages or under normal farm conditions, respectively. the experiment, which was divided into six 1-week periods, started on 6 february and continued until 20 march. flushing was performed by restricted feeding in pe ... | 2013 | 9606753 |
| differentiation of the corpus luteum of the mink (mustela vison): mitogenic and steroidogenic potential of luteal cells from embryonic diapause and postimplantation gestation. | the mink corpus luteum (cl) involutes after ovulation and remains dormant, synthesizing low amounts of progesterone until reactivated to terminate embryonic diapause. we examined the mitotic and steroid synthetic capacity of luteal cells from the diapause and postimplantation phases of mink gestation. cells from diapause divided in vitro, reaching confluence in 7-8 days. three phenotypes were distinguishable: a fusiform cell in whorls, a hypertrophied epithelioid cell, and a small epithelioid ce ... | 1998 | 9603249 |
| organochlorine and heavy metal contaminants in wild mink in western northwest territories, canada. | the mink (mustela vision) is a top trophic level species that readily bioaccumulates environmental pollutants and is considered to be a sensitive indicator of ecosystem health. spatial trends in levels of organochlorine and heavy metal contaminant burdens were determined from 1991 to 1995 for wild mink from western northwest territories (nwt), canada. tissue samples from 207 mink from seven communities were analyzed for residues of 63 organochlorines and 10 heavy metals. all groups of organochlo ... | 1998 | 9543512 |
| rates of urinary water electrolyte and nitrogen excretion in fed and fasted female mink (mustela vison). | | 1997 | 9467234 |
| can gas exchange measurements be used for calculation of nutrient oxidation in mink (mustela vison) exposed to short-term changes in energy supply? | nutrient oxidation was calculated from gas exchange measurements for 6 control and 12 flush fed female mink, measured in six consecutive, one week periods. the energy supply to controls and flushed animals in periods 1 and 6 was ca 850 kj me/day, and during restriction and flush feeding, it was ca 450 kg me/day and ca 1300 kj me/day, respectively. over the total experimental period the energy intake was similar in both groups, but it differed significantly between periods in the flushed group. p ... | 1997 | 9467225 |
| sarcocystosis in mink (mustela vison). | this report describes the clinical, microscopic, and ultrastructural findings in mink with muscular sarcocystosis. three 2-3-mo-old mink were killed because they were ill with signs of progressive neurological disease. one mink had variable numbers of sarcocysts in multiple skeletal muscles. sarcocysts were up to 300 microm in long and 20 microm wide. ultrastructurally, the sarcocyst wall had numerous elongated 1.7-2.0-microm x 250-nm villar protrusions (vp). the vp had microtubules and irregula ... | 1997 | 9406806 |
| reproductive efficiency in mink (mustela vison) treated with the pesticides lindane, carbofuran and pentachlorophenol. | mink are carnivores of agroforestry fringe habitats and are exposed to pesticides that biomagnify within the food chain. some pesticides are thought to disrupt reproductive and endocrine functions. in expt 1, four groups of mink (n = 10) were fed either a control diet, or diets treated with lindane (1 mg kg-1 day-1), carbofuran (0.05 mg kg-1 day-1) or pentachlorophenol (1 mg kg-1 day-1) from before breeding until weaning. mink were mated twice, at 7-8 day intervals. the treatments had no effect ... | 1997 | 9370963 |
| environmental pollutants as aetiological agents in female reproductive pathology: placental glycan expression in normal and polychlorinated biphenyl (pcb)-exposed mink (mustela vison). | polychlorinated biphenyls (pcb) may cause growth retardation or fetal death in mink. pathological changes in endotheliochorial mink placentae were examined following exposure to pcb during gestation. placentae from six animals with average fetal crown-rump (c-r) lengths between 16 and 53 mm given 0.65 mg/day clophen a50 (low dose), and one from five animals with an average fetal c-r length of 14 mm given 1.3 mg/day (high dose), were examined. mink were treated from 9 to 24 days before mating unt ... | 1997 | 9364605 |
| histology of ovaries and uteri and levels of plasma progesterone, oestradiol-17beta and oestrone sulphate during the implantation period in mated and gonadotrophin-releasing hormone-treated mink (mustela vison) exposed to polychlorinated biphenyls. | earlier studies have shown that polychlorinated biphenyls (pcb) do not prevent ovulation, fertilization and implantation, but exposure of female mink during gestation caused fetal death. to understand this phenomenon, 30 pcb-exposed female mink and 30 controls were mated or induced to ovulate without fertilization by treatment with gonadotrophin-releasing hormone (gnrh) and correlations were measured between reproductive, morphological and endocrine parameters. the exposure to pcb (aroclor 1254) ... | 2013 | 9339742 |
| ultrastructural and immunocytochemical studies of prolactin-secreting cells in adenohypophysis of the mink (mustela vison). | this investigation aimed to identify, by the double immunogold procedure, the ultrastructural characteristics of prolactin (prl) cells in the mink. such cells showed a marked pleomorphism and had a close topographic relationship with growth hormone cells. a common morphological characteristic of prl cells in all stages of mink development was the presence of round secretory granules, in contrast to changes in the ultrastructural characteristics of prl cells with physiological state and photoperi ... | 1997 | 9268612 |
| seasonal variation of melatonin binding sites in the pars tuberalis of the male mink (mustela vison). | the seasonal changes of 2-[125i]iodomelatonin binding were studied using quantitative autoradiography in the pars tuberalis (pt) of the mink, a short-day breeder, kept out of doors. studies were performed at 7 times of the year (july, september, october, january, february, and may), corresponding to different states of responsiveness of the gonadal system to the photoperiod. melatonin binding was observed in the pt and on the ventral border of the pars distalis. histological staining revealed th ... | 1997 | 15305570 |
| liver fatty acid composition and peroxisomal fatty acid oxidase activity in blue foxes (alopex lagopus) and mink (mustela vison) fed diets containing different levels of fish oil. | at the time of pelting (nov.), blue foxes had a lower liver lipid content (4-5%) than mink (7-10%), whereas the phospholipid (pl) content was 0.5-1% in both species. dietary fat content had little influence on total liver fat content but affected the liver fatty acid composition. levels of n3 fatty acids were higher in the pl fraction than in the remaining fraction of liver lipids in both species. because pl accounted for a larger part of the total liver lipids in blue foxes than in mink, the pr ... | 1997 | 9185341 |
| mercury in hair of muskrats (ondatra zibethicus) and mink (mustela vison) from the u. s. department of energy oak ridge reservation. | | 1997 | 9115133 |
| pathological effects of dietary zearalenone and/or tamoxifen on female mink reproductive organs. | the efficacy of dietary tamoxifen (tam) to alleviate the hyperestrogenic effects of the mycotoxin zearalenone (zen) was assessed by pathologic examination of the reproductive organs of female mink (mustela vison). mink were fed 20 mg/kg zen, 10 mg/kg tam, or 20 mg/kg zen + 10 mg/kg tam from about 2 mo prior to breeding until the kits reached 3 w of age. all female mink fed zen mated, but only 25% whelped. no mink fed tam or tam + zen mated. postmortem examination revealed moderate to severely di ... | 1997 | 9080630 |
| prolactin-induced termination of obligate diapause of mink (mustela vison) blastocysts in vitro and subsequent establishment of embryonic stem-like cells. | the mink reproductive cycle includes an obligatory period of embryonic diapause and delayed implantation, which continues in vitro and reduces the efficiency of embryonic stem (es) cell establishment. blastocysts recovered on day 7 and on days 13-16 after final mating were cultured in dulbecco's modified eagle's medium (dmem) supplemented with various concentrations of prolactin to determine optimal conditions for embryo attachment and subsequent establishment of embryonic stem cells. five treat ... | 1997 | 9155732 |
| black crystal: a novel color mutant in the american mink (mustela vision schreber). | black crystal, a new mutant of coat color pattern occurring in the american mink in the course of selection for domestic behavior, is described. a salient feature of the mutation is the appearance of white guard hairs producing a veil-like covering of the body. in the black crystal homozygote, coat color is of the himalayan type. breeding data demonstrate that the novel color phase is inherited as a monogenic autosomal semidominant trait. the mutant gene is designated as black crystal and is sym ... | 2006 | 9099008 |
| prolactin profiles of pregnant, lactating and non-mated female mink (mustela vison). | this study was part of an experiment on energy metabolism in pregnant and lactating female mink (mustela vison). ten mated and three non-mated female mink were kept in metabolic cages in the laboratory from immediately after mating until the kits were three to four weeks old. consecutive energy balance experiments with periods each of one week duration, including a 22 h respiration experiment (only three with females that were not mated) were performed, and weekly blood samples were collected fo ... | 1997 | 9404285 |
| melatonin reduces mortality from aleutian disease in mink (mustela vison). | aleutian disease (ad) results from a persistent parvoviral infection that results in marked hypergammaglobulinemia and immune complex mediated lesions of the kidney, liver, lungs and, arteries. melatonin protected both a wild type or demi strain and a demi/dark crossed strain of mink from ad. the biogenic amine also afforded protection against other non-diagnosed diseases naturally found on mink farms when it was available from a subcutaneously-placed reservoir. some genetic strains of mink appa ... | 1996 | 8989719 |
| effects of feeding and short-term fasting on water and electrolyte turnover in female mink (mustela vison). | daily (24 h) rates of water and electrolyte turnover were measured in a conventional balance study in ten adult female pastel mink (mustela vison) given free access to a standard mink feed for a 1-week conditioning period, followed by a 4 d experimental period and a 2 d fasting period. drinking water was available throughout. in addition, the completeness of urine collection and the fraction of urine collected with the faeces were determined using a new experimental technique based on 24 h recov ... | 1996 | 8958005 |
| [the effect of the selection of mustela vison mink for behavior on their folliculogenesis and reproductive function]. | the selection of minks for behaviour in two directions (aggressive and domesticated one) brought about the correlative changes in function of sexual system. the sexual maturing of domesticated mink controlled by vaginal smears began more earlier. the fertility of domesticated mink with signs of earlier oestrus was larger than one in the same females with later maturing. such correlation was absent in the aggressive females. in ovary of the aggressive mink the number of follicles of all types was ... | 2009 | 9092239 |
| balance between opposite effects of short day stimulation and testicular steroid feedback inhibition on pituitary pulsatile lh release in male mink, mustela vison. | this study explores changes in pituitary pulsatile luteinizing hormone (lh) secretion in intact and castrated male mink, either previously photogonadostimulated by short day treatment (ld 4:20), or maintained in a state of sexual quiescence by long day treatment (ld 20:4). artificial photoperiodic treatment of intact mink significantly increases plasma lh level and pulse frequency, following transfer from inhibiting long-to stimulating short-days. this photoperiodic control mimics two important ... | 1996 | 8983167 |
| [the visualization of the pronuclei in zygotes of the american mink]. | visualization of the pronuclei in optically nontransparent mink zygotes was achieved after centrifugation at 15,000 g. under these conditions, the lipid fraction was concentrated in the light hemisphere of the zygote, while the pronuclei were localized in the equatorial area. centrifugation did not affect the viability of zygotes, and no reliable differences in the rate of birth were found after transplantation of the native and centrifuge zygotes to the recipient females. treatment of the zygot ... | 2006 | 8975205 |
| assessment of the accuracy of quantitative urine collection in mink (mustela vison) using osmotic pumps for continuous release of p-amino-hippuric acid and inulin. | a method is described to assess the accuracy of quantitative collection of urine in small experimental animals using implanted alzet osmotic pumps for continuous release of specific urinary markers. the nominal pumping rate (10.00 +/- 0.15 microliters/h; mean +/- sem) of 10 osmotic pumps was verified (9.96 +/- 0.12 microliters/h) in a 10-day in vitro assay in isotonic saline at 39.0 degrees c. ten adult female mink (1100 +/- 34 g) had a 2-ml osmotic pump implanted intraperitoneally for 7 days wh ... | 1996 | 8843052 |
| genetic determination of coat color affects testicular steroidogenesis in the mustela vison. | coat color genes in mammals are known to be developmental genes with wide pleiotropic effects. the present study was undertaken to study testicular steroidogenesis in american mink (mustela vison) of various coat color phenotypes. no differences in testicular steroid levels were observed between fertile and infertile mink with the standard phenotype and genotype (bb jj mm pp). mink with the opaline phenotype and genotype (bb mm pp), were found to have in their testes, 20-40% higher levels of pro ... | 1996 | 8870105 |
| development of pcr primers for nine polymorphic american mink mustela vison microsatellite loci. | | 1996 | 8673278 |
| acid-base status and cardiovascular function in mink (mustela vison) anaesthetized with ketamine/midazolam. | heart rate, arterial blood pressure and blood acid-base status were determined in 18 adult female mink (mean (+/- sem) body weight 1052 +/- 34 g) during long-term anaesthesia with either controlled ventilation (n=12) or spontaneous respiration (n=6). surgical anaesthesia was induced by intramuscular injection of ketamine hydrochloride (ketaminol vet, 40.0 +/- 1.7 mg/kg) and midazolam hydrochloride (dormicum 2.8 +/- 0.1 mg/kg) and maintained for at least 5 h by continuous intravenous infusion of ... | 1996 | 8709575 |
| genetic control of pi and gc variants in the american mink. | genetic polymorphism of the serum alpha-protease inhibitor (pi) and group-specific component (gc) in minks was revealed using one-dimensional polyacrylamide gel electrophoresis and immunoblotting. two codominant alleles were identified at each of the two loci. the data ruled out the possibility of any linkage between the pi, gc and the coat colour gene crystal (cr). | 1995 | 8572367 |
| histopathology of postpartum placental sites in mink (mustela vison) exposed to polychlorinated biphenyls or fractions thereof. | polychlorinated biphenyls (pcb) cause reproductive failure in mink. ovulation and nidation occur, but the fetuses die during gestation. the toxicity of different chlorinated biphenyl (cb) congeners differs markedly. dioxin-like congeners with no (0-ortho cbs) chlorine in the ortho position to the biphenyl bond are considered to be highly toxic. altogether, 13 groups of 10 female mink (mustela vison) were exposed to pcb or cb fractions thereof during the reproductive season of 1988 and 1989. in 1 ... | 1995 | 8562024 |
| immunohistochemical identification and morphometric study of acth cells of mink (mustela vison) during growth and different stages of sexual activity in the adult. | the morphological characteristics and changes in the cellular area and volume density of acth cells have been examined in the mink from the first half of the suckling period to adulthood and in the adult mink at different stages of the sexual cycle. acth cells were identified immunohistochemically (avidin-biotin complex) and applied over semithin sections. unlike in suckling and prepubertal mink, there was a clear topographic relation between adenohypophysial follicles and acth cells in pubertal ... | 1995 | 8575654 |
| the decline of mink in georgia, north carolina, and south carolina: the role of contaminants. | since the 1960s, mink (mustela vision) populations in georgia, north carolina, and south carolina have declined, especially in the coastal plain. a prior study suggested that the decline may stem from environmental contaminants. based on water quality data from each state, we identified 17 substances potentially related to the decline: aldrin, dieldrin, endrin, ddd, dde, ddt, pcbs, chlordane, alpha-bhc, toxaphene, dibenzofuran, copper, chromium, cadmium, lead, arsenic, and mercury. mink livers w ... | 1995 | 7487161 |
| bilateral adrenalectomy induces early onset of summer fur growth in mink (mustela vison). | the purpose of this study was to determine the effects of bilateral adrenalectomy on the time at which growth of the summer pelage begins in mink. bilateral adrenalectomy of adult female mink between 2 and 11 march 1991, supplemented with deoxycorticosterone (doc) as a mineralocorticoid, resulted in the onset of the summer fur growth approximately 5 weeks earlier than the controls (p < 0.01). mink with their adrenal glands intact and treated with doc, exhibited summer fur growth 2 weeks earlier ... | 1995 | 8521246 |
| [enzymes of the antioxidant system in the postnatal ontogeny of mink]. | the activity of the key antioxidant enzymes, superoxide dismutase and catalase, was estimated in various organs of mink (mustela vison briss.) pups during postnatal ontogenesis. the organ-specific distribution of these enzymes was established and the levels of their activity were matched to certain periods of ontogenesis. this enzymatic system is already formed by the moment of birth, and further changes in it are related to the growth of organs and the effects of environmental factors. | 2006 | 7777260 |
| ultrasonographic analysis of gestation in mink (mustela vison). | mink are seasonal breeders that display an obligate delay preceding implantation and a post implantation gestation of 31 d. the purpose of this study was to evaluate gestational parameters in mink by ultrasonography. a total of 92 female mink were mated twice during the period from march 2 to 20. the mink were scanned once and allowed to whelp (n=55); or scanned at 3 to 5-d intervals until parturition (n=13); or immediately subjected to autopsy (n=24) after scanning. embryonic age was calculated ... | 1995 | 16727650 |
| presence of mammosomatotropic (ms) cells in mink (mustela vison) adenohypophysis. | this study was undertaken to investigate the presence of mammosomatotrophs (ms) cells in the suckling mink. using the double immunolabeling procedure, with colloidal gold as label, we demonstrated the existence of ms cells in these animals. only one type of ms cells has been observed. these cells showed a great morphological similarity to classic prolactin (prl) cells. ms cells of suckling mink were pleomorphic in appearance with many processes, their nuclei were irregular and their golgi appara ... | 1995 | 7740536 |
| environmental contaminants in wild mink in the northwest territories, canada. | as a top trophic level species that readily bioaccumulates environmental pollutants, the mink (mustela vison) is considered to be a sensitive indicator of ecosystem health. here we report on the first 2 years of a 4-year program established to examine organochlorine and heavy metal residues in wild mink from western northwest territories (nwt), canada. tissue samples taken from up to 24 mink harvested from each of five sites in 1991-92 and 1992-93 were analyzed for residues of a suite of 63 orga ... | 1995 | 7892580 |
| the arteries of the base of the brain in the n. american mink (mustela vison (brisson, 1756)). | 110 brains of the n. american mink were studied for the arteries of the base of the brain, using the anatomical method and digital imaging analysis. two arterial circles were isolated: the larger cerebral circle (cc) and the smaller medullar circle (mc). these were connected by the basal artery of the brain. we found that in cc, its left part was larger, whereas in mc, it was the right part that was larger. also, the capacity was larger in the caudal part of mc than in its rostral part. | 1995 | 9071461 |
| vasoactive intestinal polypeptide in the suprachiasmatic nucleus of the mink (mustela vison) could play a key role in photic induction. | the present study was conducted to visualize neuropeptides in the scn of a mustelid, the american mink in which seasonal cycles of reproduction rely totally on the annual changes in day length. at this time, data in mustelids are lacking. results were obtained with in situ hybridization (ish) using synthetic oligonucleotide vasopressin (avp) and somatostatin (som) and with single and dual immunohistochemistry (ihc) performed with antisera against avp, som, vasoactive intestinal polypeptide (vip) ... | 1995 | 7735300 |
| the xy pair of the mink (mustela vision) during different periods of testicular activity. | synaptonemal complexes of the mink (mustela vison) were examined during different stages of testicular activity to determine whether the distribution of prophase substages and the configuration of the sex complement are altered during pre-quiescent and regenerative phases compared to those detected during the breeding period. spermatocytes obtained during pre-quiescence showed no differences from those of breeding season in terms of substage distribution, whereas those from regenerating testes w ... | 1995 | 7558884 |
| energy metabolism and nutrient oxidation in the pregnant mink (mustela vison) as a model for other carnivores. | the mink is a strict carnivore and a seasonal breeder, which may be used as an experimental model for other carnivores. the present investigation comprised a total of 44 balance experiments, each including a 24-h measurement of heat production by indirect calorimetry, carried out from mating until close to parturition. for observations with a nonprotein respiratory quotient between 0.7 and 1.0 (n = 42), quantitative oxidation of nutrients was calculated. the weight gain of the uterus during preg ... | 1994 | 7996249 |
| hematologic and serum chemistry reference values for adult brown mink. | hematologic and serum chemistry reference values were determined for 160 12-month-old brown untamed captive mink (mustela vision). blood was obtained by jugular venipuncture after administration of ketamine and xylazine. there were no statistically significant differences between male and female mink. the packed cell volume, hemoglobin, and red blood cell count were 10 to 20% lower than previously reported for non-anesthesized mink. serum glucose, alanine aminotransferase and aspartate aminotran ... | 1994 | 7760500 |
| effect of protein and fat content in feed on plasma alanine-aminotransferase and hepatic fatty infiltration in mink. | the effect of the content of protein and fat in the feed on the development of fatty infiltration of the liver in the period from weaning until pelting was measured in two groups of male scanblack mink (mustela vision) fed 20% and 45%, respectively, of metabolizable energy (me) from protein. furthermore, plasma activity of alanine-aminotransferase and the content of specifically chosen clinical-chemical variables in the blood were measured. at pelting time in december, the liver weights were abs ... | 1994 | 7732739 |
| [effect of an alimentary thiocyanate supplement on the hide characteristics of mink (mustela vision)]. | in farm minks the following effects were achieved by additional feeding of kscn (0,9-2,6 mg scn-/kg body weight) equivalent to twice til triple the usual scn- intake (0,2-0,9 mg scn-/kg body weight) during the 3. to 7. month of life: improvement of the coat structure and of length, density, and elasticity of the guard hairs, additionally to increase of body weight and length. | 1994 | 7980379 |
| seasonal variations of pulsatile luteinizing hormone release in the mink (mustela vison). | the pulsatile secretion of the hypophyseal luteinizing hormone (lh) is induced by the pulsatile secretion of the hypothalamic neurons secreting gonadotrophin-releasing hormone (gnrh). seasonal variations in the pulsatility of lh were studied in the adult male mink (mustela vison), reared under natural environmental conditions. twenty-one animals were studied according to five critical phases in the breeding season: (1) the terminal phase of sexual quiescence, which precedes renewal of gonadal ac ... | 1994 | 7881812 |
| roles of melatonin and prolactin in testicular crudescence in mink (mustela vison). | peripubertal male mink (mustela vison) were treated with prolactin, melatonin or antibodies against melatonin to determine the effects of altered circulating concentrations of prolactin and melatonin throughout one season of testicular development. treatment began on 1 october and continued until 4 march. administration of 0.5 mg ovine prolactin day-1 by minipump increased the circulating concentration of prolactin for the duration of the study and increased serum concentrations of lh. this trea ... | 1994 | 7799302 |
| 2,2',4,4',5,5'- and 3,3',4,4',5,5'-hexachlorobiphenyl alteration of uterine progesterone and estrogen receptors coincides with embryotoxicity in mink (mustela vision). | female mink (mustela vison) are highly sensitive to organochlorine (oc)-induced reproductive impairment. however, mechanisms of this reproductive toxicity are unknown. we have investigated the possible role of steroid receptors in embryotoxicity and reduced neonate weights. anestrous, juvenile female mink and pregnant adult mink were exposed to 3,3',4,4',5,5'-hexachlorobiphenyl (3hcb), a coplanar polychlorinated biphenyl (pcb), or 2,2',4,4',5,5'-hexachlorobiphenyl (2hcb), a noncoplanar pcb conge ... | 1994 | 8048058 |
| selection for litter size, body weight, and pelt quality in mink (mustela vison): correlated responses. | in a five-generation selection experiment, separate lines of standard mink (mustela vison) were subjected to selection for litter size at 3 wk (f line), body weight in september (bs line), underfur density (p line), or combined selection for litter size and body weight (i line). one unselected line served as a control (c line). the present paper focuses on correlated responses to selection regarding fertility and fitness traits, fur quality, and body size traits. genetic and environmental parame ... | 1994 | 8056657 |
| the efficacy of mineral oil combined with feed restriction in enhancing the elimination of heptachlor epoxide from mink (mustela vison). | adult female mink previously fed diets containing 0 (control) and 6.25 mg heptachlor/kg diet for 181 days were fed either the same control diet ad libitum (al) or the control diet containing 10% mineral oil and restricted by 45% of ad libitum intake (mo/r) for 21 days to determine the efficacy of the latter treatment in enhancing the elimination of heptachlor epoxide (he) from mink. kit mink (2-3 months of age) whelped by dams of the control and 6.25 mg/kg groups were also fed the mo/r or al die ... | 1994 | 8161234 |
| ovarian follicular development in mink (mustela vison). | ovarian follicular dynamics were studied during the breeding season, before and after ovulation in mink. nulliparous female mink were stimulated to ovulate with an injection of 4 micrograms gnrh. ovaries from three animals were collected on days 0, 2, 3, 4, 5, 6 and 7 after hormone treatment. a second dose of gnrh was administered on day 8 and ovaries were collected from three animals on day 9. corpora lutea and follicles were identified in histological sections and follicles were classified by ... | 1994 | 8021880 |
| rates of heat and water loss in female mink (mustela vison) measured by direct calorimetry. | the energy expenditure (ee) of adult female mink was studied by continuous 24-hr measurement of rates of total heat loss (thl) in a controlled environment using a 24 m3 calorimeter allowing separate on-line determination of sensitive (shl) and evaporative (ehl) heat loss within the range of 20-200 w (72-720 kj/hr). in four adult female mink (scanblack colour mutant), studied in transparent cages and given free access to feline food pellets and water, the mean 24-hr energy expenditure (= thl) und ... | 1994 | 7909731 |
| [phenogenetic analysis of pigmentation of a new coat color mutation of american mink (mustela vison. schr. l.) and its combination with some of the known mutations]. | a new dominant coat color mutation "talitsa" was revealed in the mink population of "znamenskii" state fur farm (tverskaya region', russia). qualitative analysis and quantitative assessment of the hair pigment of minks with the standard coat color, talitsa, royal-pastel and american pearl mutations, as well as talitsa x royal-pastel and talitsa x american pearl hybrids were conducted. it was shown that hair of all genotypes studied contained only one pigment type, namely, eumelanin. hair of the ... | 1994 | 8045387 |
| the triangle of the urinary bladder in american mink (mustela vision (brisson, 1756)). | 60 bladders of american minks were dissected according to conventional method. biometrical analysis with the use of digital image analysis system was applied to the triangles of the bladders. it was found that these triangles differ both in shape (narrow, broad) and symmetry (considerable asymmetry). the ureteral orifices also showed a variety in shape (five types) and number (double orifices). | 1994 | 8590902 |
| skeletotopy of the gall bladder in american mink (mustela vision (brisson, 1756)). | using anatomical and radiological methods, the projection of the gall bladder was studied in relation to the vertebral column in fifty adult minks of both sexes. the gall bladder was found to be in three positions when in relation to: 1) the longitudinal axis of the vertebral column, 2) the numerical order of the vertebrae. | 1994 | 8590900 |
| effects of melatonin treatment on the gonadotropin-releasing hormone neuronal system and on gonadotropin secretion in male mink, mustela vison, in the presence or absence of testosterone feedback. | the effects of subcutaneous melatonin capsules on the gonadotropin-releasing hormone (gnrh) immunoreactive (ir) system and the secretion of follicle stimulating hormone (fsh) and luteinizing hormone (lh) have been tested in intact, castrated, and castrated adult male mink supplemented with testosterone. animals were transferred in july, i.e., during the period of sexual rest, under a daily light:dark cycle of 16-hr light and 8-hr darkness and studied over 13 weeks. gnrh (ir) perikarya, visualize ... | 1994 | 8158519 |
| the vomeronasal system of the mink, mustela vison. i. the vomeronasal organ. | the vomeronasal organ (vno) of the mink is restricted to the area of the fissura palatina and thus always topographically related to the ductus incisivus (di). the vno and di have also a functional relation because the vomeronasal duct ends in the incisive duct. on the other hand, as the di has its mouth in the papilla incisiva there is a communication between the vno and the oral cavity. the vomeronasal cartilage, approximately in 1/6 of its length, wraps completely the parenchyma of the vno wh ... | 1994 | 7873798 |
| selection for litter size, body weight, and pelt quality in mink (mustela vison): experimental design and direct response of each trait. | in a five-generation selection experiment, separate lines of mink (mustela vison) were subjected to selection for improved litter size at 3 wk (f line), bw in september (bs line), and underfur density (p line), and combined selection for litter size and bw (i line). underfur density was subjectively judged on live animals. one unselected line served as a control (c line). significant changes were achieved in each trait: litter size in the last generation was 5.3 in the f line vs 3.7 in the c lin ... | 1993 | 8294277 |
| effects of deoxynivalenol on feed consumption and body weight gains in mink (mustela vison). | | 1993 | 8318775 |
| [pcb methylsulfone accumulated in muscle of mink dosed with pcb (clophen a50)]. | the structural requirements of the parent pcbs for the formation of the retained pcb methylsulfones (meso2-cbs) were investigated in mink (mustela vison) exposed to pcb (clophen a50). muscle was analyzed for the meso2-cbs, which were determined by comparison of synthesized reference compounds. major unmetabolized cbs such as 2, 4, 5, 2', 4'-pentacb, 2, 4, 5, 2', 3', 4'-hexacb, 2, 4, 5, 2', 4', 5'-hexacb and 2, 3, 4, 5, 2', 4', 5'-heptacb were determined in high concentrations in the mink muscle. ... | 1993 | 8330844 |
| prolactin binding sites in the adrenal glands of mink (mustela vison). | 1. the purpose of this study was to determine if the mink adrenal gland might be a target organ for prolactin by establishing whether or not binding sites for the hormone exist in adrenal cell membranes. 2. adrenal glands were collected from adult female mink in november, 1991, homogenized and subjected to differential centrifugation into three particulate fractions; 1500, 15,000 and 50,000 g. all binding determinations were made using 125i-oprl and 200-300 micrograms protein from the 50,000 g p ... | 1993 | 8472544 |
| the reproductive effects of dietary heptachlor in mink (mustela vison). | adult female mink were fed diets containing 0 (control), 6.25, 12.5, and 25 ppm (micrograms/g) technical grade heptachlor prior to and throughout the reproductive period (181 days) to evaluate the effects of heptachlor consumption on reproduction and offspring viability and to assess the extent of placental and mammary transfer of heptachlor epoxide to mink offspring. feeding 12.5 and 25 ppm resulted in significant reductions in feed consumption and body weights of female mink. mortality was 0, ... | 1993 | 8466297 |
| the ventricles of the brain in the n. american mink (mustela vison (brisson, 1756)). | using anatomical as well as radiographic and tomographic methods, sixty brains of the n. american mink were examined. it was found that the brain consists of four ventricles. also, it was noted that the posterior horn was missing and that there was the olfactory recess present in the lateral ventricle, a large-size interthalamic connection present in the third ventricle, and a flat, necklace-like bottom in the fourth ventricle. only recently, the ins and outs of the mink's anatomical structure h ... | 1993 | 10187989 |
| evidence of decrease in brain size in ranch mink, mustela vison f. dom., during subadult postnatal ontogenesis. | total brain size and the volume of several brain parts were compared in male and female ranch mink of varying age and body size in an attempt to quantify postnatal maturation and growth processes in this altricial species. volumes of fresh whole brains and of different brain parts were calculated from prepared histological sections from juvenile (2- to 3-month-old), subadult (5-month-old), and adult (older than 7 months) individuals. allometrical calculations were performed on the basis of body ... | 1993 | 8324619 |
| effect of body condition and dietary energy supply on reproductive processes in the female mink (mustela vison). | this paper reviews a series of experiments regarding the influence of body condition and dietary energy supply on reproductive processes in the female mink. the reporting is based on 1905 sets of reproductive performance data and on data regarding number of corpora lutea, implantation rate, plasma progesterone and oestradiol, luteinizing hormone (lh) release and ovulation rate, and the early development of the fertilized ova. generally, treatment effects were more pronounced in yearling females ... | 1993 | 8229951 |
| control of luteal function in the mink (mustela vison). | the ranch mink was studied to determine the role of pituitary luteotrophins on corpus luteum (cl) function before and after implantation. twelve mink were treated with monoclonal antiserum against gonadotrophin-releasing hormone (gnrh), and 12 with an irrelevant monoclonal antibody during embryonic diapause. activation of the cl, plasma progesterone concentration and embryo implantation were unaffected by this treatment. in a second trial, groups of ten mink were treated with gnrh antibodies, br ... | 1993 | 8229925 |