Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| immobilization of harp seals, phoca groenlandica, by intravenous injection of ketamine. | 1977 | 15781 | |
| effects of handling stress on plasma enzymes in harp seals, phoca groenlandica. | three harp seal pups, phoca groenlandica, were captured on the ice of the gulf of st. lawrence, and subjected to 3 h of transportation and handling stress. the activities of creatine kinase (ck), aspartate aminotransferase (aspat), aldolase, alanine aminotransferase, gamma glutamyl transpeptidase, and leucine aminopeptidase were determined in serial blood samples collected for 4 d following the stress episode. marked elevation of plasma ck activity was observed 3 h after capture. values returned ... | 1979 | 42815 |
| organochlorine residues in harp seal (phagophilus groenlandicus) tissues, gulf of st. lawrence, 1971, 1973. | levels of p,p'-ddt, p,p'-tde, p,p'-dde, dieldrin, polychlorinated biphenyls (pcbs), and hcb were determined in certain tissues of 31 harp seals (p hagophilus groenlandicus) taken from the gulf of st. lawrence during 1971 and 1973. the seals ranged in age from less than two weeks to 18 years. mean concentrations of pcbs and sigma ddt in the various tissues were about the same sigma ddt levels were 1.64--9.88 ppm in adult seal blubber and 1.08--3.73 ppm in seal pup blubber. organochlorine levels i ... | 1979 | 111215 |
| structure of the adenohypophysis in parturient female and neonate harp seals, pagophilus groenlandicus. | the pars distalis of parturient harp seals (pagophilus groenlandicus) is divisible into three distinct zones based on the major cellular components of the different regions. a clear zonation is lacking in neonate seals, the medical "basophilic wedge" and the anterior gonadotrophic were small and difficult to identify. five cell types were identified based on cytological characteristics: somatotrophs, mammotrophs, thyrotrophs, gonadotrophs and stellate cells; corticotrophs could not be identified ... | 1987 | 212196 |
| some aspects of temperature regulation in newborn harp seal pups. | harp seals are born on the drifting ice of the north atlantic ocean during arctic winter when temperatures of -20 degrees c, occasionally in combination with wind of 10 m/s, might prevail for days. at birth the pups lack subcutaneous blubber and the wet infantile fur has a conductance value of 30.0 w . m-2 . degrees c-1, as compared with only 2.0 w . m-2 . degrees c-1 when dry. while still wet immediately after birth the pups are nevertheless able to retain body core temperature by shivering. th ... | 1979 | 218465 |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). xiv. cardiac arrythmias. | 1975 | 234337 | |
| structure of the testis in neonate and adult harp seals, pagophilus groenlandicus. | the structure of the seminiferous tubules in neonate harp seals, pagophilus groenlandicus, was essentially similar in one-, five- and ten-day old animals. the tubules were small in diameter, devoid of lumina and contained predominantly supportive cells. the interstitial cells in the neonates were large, numerous and highly vacuolated. they became smaller and appeared less active in the ten-day old animals compared with the one-day old seals, although they were still considerably more numerous an ... | 1979 | 527014 |
| temperature regulation in freely diving harp seals (phoca groenlandica). | 1979 | 540272 | |
| aspects of temperature regulation in harp seal pups evaluated by in vivo experiments and computer simulations. | temperature regulation in harp seal pups (pagophilus groenlandicus) has been studied by in vivo measurements of oxygen consumption, body temperatures and in vitro determinations of the thermal values of a fur sample. the experimental animals were restrained and exposed to natural wheather conditions. solar irradiance above 600 w/m (global radiation) caused hyperthermia. computer simulations based on the thermal values of the fur indicated that heat dissipation from primarily the limbs is a prere ... | 1978 | 726922 |
| effects of experimental vitamin e deprivation in the harp seal, phoca groenlandica. | 1978 | 737599 | |
| a surface preparation study on the effect of methyl mercury on the sensory hair cell population in the cochlea of the harp seal (pagophilus groenlandicus erxleben, 1777). | 1977 | 837277 | |
| plasma and tissue levels of dietary radiotocopherols in the harp seal, phoca groenlandica. | plasma and tissue levels of dietary radiotracer-labeled tocopherols were examined in the harp seal, phoca groenlandica. the d-alpha form showed much higher plasma maxima and retention than d,l-gamma-tocopherol. concentration peaks occurred somewhat later but were greater when the vitamin was fed with tween 80 than with herring and corn oil respectively. greater plasma levels occurred with the use of herring oil as compared with corn oil. seals previously maintained on a vitamin e deficient diet ... | 1977 | 884616 |
| methylmercury poisoning in the harp seal (pagophilus groenlandicus). | hematological and blood chemistry values were examined in harp seals (pagophilus groenlandicus) exposed to daily oral dosages of methylmercuric chloride (mmc). two seals, exposed to 0.25 mg mmc/kg body weight/day for 60 and 90 days, respectively, did not show abnormal blood values. two other seals exposed to 25.0 mg mmc/kg body weight/day died on day 20 and 26 of exposure. blood parameters indicated toxic hepatitis, uremia and renal failure. total mercury and methylmercury values in the tissues ... | 1977 | 887917 |
| [physiological and biochemical characteristics of the blood of the greenland seal, pagophilus groenlandicus]. | high hemoglobin concentration, rich hemoglobin supply of the body and high specific weight of the blood were found in harp seal cubs. the erythrocyte number is relatively low which agrees with our previous studies on aquatic and semi-aquatic mammals. serum proteins from both adult and young harp seals are separated into 5-8 fractions during agar-agar gel electrophoresis. diving of seals for considerable periods is partly accounted for by high hemoglobin and myoglobin concentrations adn also by p ... | 2006 | 899380 |
| the effect of hypercapnia on respiratory characteristics and diving behaviour of freely diving seals. | three trained young seals, one harp seal, pagophilus groenlandicus, and two hooded seals, cystophora cristata, have been used to study the effect of hypercapnia on respiratory characteristics and diving behaviour. the seals were allowed free movements within a circular pool, while diving and respiratory behaviour were recorded. during the experiments the alveolar co2 tension was continually recorded. there was a significant decrease in duration of dives with increasing paco2 for all animals. ve ... | 1976 | 935697 |
| organochlorine and mercury residues in the harp seal (pagophilus groenlandicus). | samples of blubber, liver, kidney and brain, obtained from 10 male, 6 female neonatal, and 4 lactating female harp seals (pagophilus groenlandicus), were analysed for ddt, dieldrin, pcb, and total mercury. methyl mercury levels in blood were also determined. biocide deposition was not significantly different in female and male ten day old pups. there were no significant differences in biocide levels in the liver of the 14/+ day old males, but in blubber there were significant differences in diel ... | 1976 | 945609 |
| brown adipose tissue-a factor in the survival of harp seal pups. | the respiratory characteristics of mitochondria isolated from the subcutaneous brown adipose tissue of newborn harp seals indicate that the tissue is thermogenically active. temperature recordings in vivo revealed, in fact, that the tissue was maintained at a temperature close to that of the body core during immersion of the pups in ice-water. beta-adrenergic blockade markedly increased the cooling rates at both locations in ice-water, while curarization, accompanied by artificial respiration di ... | 1976 | 953869 |
| population and density of the bipolar ganglion cells in the cochlea of the harp seal (pagophilus groenlandicus erxleben, 1777). | 1976 | 991017 | |
| structure of the adenohypophysis in juvenile harp seal, pagophilus groenlandicus. | a study was made of the morphology of the adenohypophysis in immature harp seals and the fine structure of cellular components of the pars tuberalis, pars intermedia and pars distalis was described. the pars intermedia composed 8-15% of the hypophysis and contained colloid filled vesicles similar to those found in the other mammalian species. the pars distalis cells were grouped into more or less well defined regions, thus facilitating the correlation of cellular identification from both light a ... | 1976 | 991248 |
| critical flicker frequency in q harp seal; evidence for duplexretinalorganization. | 1975 | 1138491 | |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). xvii. structure and metabolic adaption of the caval sphincter muscle with some observations on the diaphragm. | three types of fibre, dark (type 1), light (type 2) and intermediate, were distinguished in the caval sphincter muscle of the diaphragm in the harp seal (pagophilus groenlandicus) using histochemical and electron-microscopic techniques. the dark fibre contained large peripheral aggregations of mitochondria, numerous lipid droplets and dense aggregates of glycogen granules. the same features were observed in the dark fibre of the diaphragm muscle too. in the light of the low oxidative enzyme acti ... | 1975 | 1189903 |
| tocopherol distribution in the harp seal, pagophilus groenlandicus. | 1975 | 1204337 | |
| steroidogenesis in vitro in the harp seal (pagophilus groenlandicus) without and with methyl mercury treatment in vivo. | tissue from a harp seal given methyl mercury at a concentration of 0.25 mg/kg in its diet for 61 days, was highly contaminated with mercury. over 70% of the mercury in the seal's liver (64.0 p.p.m.) was in the inorganic form indicating a demethylating system in this organ. most of the mercury in the liver, spleen and kidney of an untreated seal was also in the inorganic form. in contrast, over 75% of the mercury in the adrenals and gonads (14.2 and 13.0 p.p.m., respectively) of the treated seal ... | 1975 | 1213032 |
| a comparative study of surface preparations of the organ of corti of the harp seal (pagophilus groenlandicus erxleben 1777) and the ringed seal (pusa hispida). 1. sensory cell population and density. | 1976 | 1253008 | |
| fatty-acyl esters of retinol (vitamin a) in the liver of the harp seal (phoca groenlandica), hooded seal (cystophora cristata), and california sea lion (zalophus californianus). | the fatty-acid composition of retinyl esters in the livers of two species of phocid seal, the harp seal (phoca groenlandica, n = 20) and the hooded seal (cystophora cristata, n = 15), and one species of otariid seal, the california sea lion (zalophus californianus, n = 6), was determined. vitamin a ranged in concentration from 4 to 1024 nmol retinol/g liver for the phocids and from 381 to 979 nmol/g liver for the otariids. in most of the livers, retinyl palmitate was not the principal ester, and ... | 1992 | 1482558 |
| positional specificity of gastric hydrolysis of long-chain n-3 polyunsaturated fatty acids of seal milk triglycerides. | long-chain n-3 polyunsaturated fatty acids (n-3 pufa) of marine oils are important dietary components for both infants and adults, and are incorporated into milks following maternal dietary intake. however, little is known about the hydrolysis of these pufa from milk triglycerides (tg) by lipases in suckling young. seals, like humans, possess gastric lipase; however, the milk lipids of seals and sea lions are almost devoid of the readily hydrolyzable medium-chain fatty acids, and are characteriz ... | 1992 | 1491605 |
| monoclonal antibody to alkaline phosphatase from the intestinal mucosa of the harp seal, phoca groenlandica. | 1. hybridoma secreting a monoclonal antibody app.1 to the harp seal alkaline phosphatase (a1ph) was obtained by fusing murine myeloma sp 2/0 cells with the splenocytes of balb/c mice immunized with purified isozyme k. 2. the antibody has no effect on the enzyme activity and shows a high affinity for harp seal a1ph (kd = 8.5 x 10(-10) m). the antibody has similar affinities for the alph of harp seal, fur seal, common seal and deer. 3. the antibody app.1 was coupled to sepharose and employed in ch ... | 1992 | 1611886 |
| insulation and thermal balance of fasting harp and grey seal pups. | 1. harp and grey seal pups were examined during the post-weaning period to quantify their thermoregulatory abilities and thermal limits. 2. deep body temperatures of harp seals (37.8 +/- 0.8 degrees c) were not significantly different from those of grey seals (38.9 +/- 0.4 degrees c). 3. as blubber depth declined during the fast, temperature gradients extended increasingly deeper into the muscle layer potentially decreasing heat loss. 4. blubber conductivity (approximately 0.18 w/m/degrees c) di ... | 1991 | 1685375 |
| [the effect of blood serum proteins from the seal on the analgetic action of narcotic analgesics]. | the protein fraction isolated from blood of seal, phoca groenlandica, has been found to produce hyperalgesic effect on rats exposed to thermic or electrocutaneous nociceptive stimulation, but fail to affect writhes provoked by intraperitoneal injection of acetic acid solution on mice. when combined with morphine, the fraction lowered completely its narcotic analgetic action in the above mentioned tests. on the contrary, these same proteins combined with promedol or fentanil enhanced and prolonge ... | 1991 | 1687360 |
| purification of alkaline phosphatase from the intestinal content of common seal (phoca vitulina larga) by immunoaffinity chromatography. | 1. a monoclonal antibody app, 1 against harp seal alkaline phosphatase has been prepared. it was found that the antibody was cross-reacted with the intestinal alkaline phosphatase of common seal phoca vitulina larga. 2. purified antibody was linked to sepharose 4b and used for immunoaffinity chromatographic purification of alkaline phosphatase from the intestinal content of common seal. a spec. act. of the purified enzyme was 7300 units per mg of protein. 3. the enzyme in 7.5% polyacrylamide gel ... | 1991 | 1769201 |
| [adrenal histostructure in the postnatal ontogeny of the greenland seal, pagophilus groenlandica erxleben, 1777 (phocidae)]. | histological structure of adrenal gland is studied in four age groups of the harp seal: in adults, in two juvenile groups (6 and 1-1.5 months), and in newborns (1-1.5 days). development of the adrenal gland in this species is analogous to that of terrestrial mammals, but also has some peculiarities of its own. differentiation of the definitive cortex occur in the prenatal development. in the newborns it is, though weakly developed, clearly differentiated into arched, fascicle and reticular zones ... | 2006 | 1792821 |
| polycyclic aromatic hydrocarbons in harp seals (phoca groenlandica) from the northwest atlantic. | there is virtually no information available on concentrations of polycyclic aromatic hydrocarbons (pah) in seals from any of the world's oceans. the largest harp seal population in the world is found in canadian waters of the northwest atlantic. samples of muscle tissue obtained from twenty eight harp seals ranging in age from foetuses to animals 22 years old were analyzed for total pah and lipid content. concentrations were determined in terms of crude oil and chrysene equivalents in line with ... | 1991 | 1898111 |
| [structure of the adrenal glands of greenland seal pagophilus groenlandica erxleben, 1777 (phocidae)]. | the harp seal adrenal gland studied is alike that of terrestrial mammals, but has some peculiarities. firstly, this is presence of the fetal cortex in the adrenal gland without any signs of involution and degeneration in adult animals. this phenomenon has been previously described only for the horse adrenal gland. the glomerular zone of the cortex peculiar for the adrenals in the terrestrial mammals in the species studied has the form of arches. this property is also characteristic only to the h ... | 1990 | 2268192 |
| a review of the 1988 european seal morbillivirus epizootic. | an epizootic of morbillivirus infection killed thousands of common seals (phoca vitulina) in european seas in 1988. most of the affected seals had respiratory signs and the main post mortem finding was acute pneumonia. the histopathological changes were similar to those of canine distemper. six common porpoises (phocoena phocoena) found stranded on the coast of northern ireland in late 1988 had similar lesions. morbillivirus infection also killed several thousand siberian seals (phoca siberica) ... | 1990 | 2288059 |
| effects of suckling and the postsuckling fast on weights of the body and internal organs of harp and hooded seal pups. | the weights of harp seal pups quadruple during 13 days of suckling while hooded seal pups double in weight in a lactation period of just 4 days. pups of both species then fast for a month or longer. as a first measure of tissue responses to this 'feast and famine' pattern, we weighted the body, sculp (blubber and attached skin), core (carcass including viscera) and major internal organs of seal pups at birth, at the end of suckling, and at the end of the fast. when expressed as a percentage of b ... | 1989 | 2605282 |
| [sleep and wakefulness in greenland seal pups]. | ecog of both hemispheres, eog, neck emg and ekg were recorded in 2 white (age 10 days) and 2 gray pups (age 1 month) of harp seal. the active wakefulness occupied 23.4 +/- 3.8% of total recording time, the relaxed wakefulness--32.6 +/- 3.6%, drowsiness--4.8 +/- 1.1%, slow wave sleep--31.5 +/- 3.0%, paradoxical sleep--7.7 +/- 0.8%. the sleep cycle averaged 18.2 +/- 1.4 min. interhemispheric asymmetry of the ecog was not seen in all 4 pups. the respiration was fast and regular in the relaxed wakef ... | 2009 | 2629390 |
| chemical modification and composition of tetrameric isozyme k of alkaline phosphatase from harp seal intestinal mucosa. | 1. the carbohydrate content of isozyme k of alkaline phosphatase (ec 3.1.3.1) from harp seal intestinal mucosa was examined. the presence of n-acetylglucosamine, n-acetylgalactosamine and considerable amounts of mannose residues was shown. 2. the amino acid content of seal alkaline phosphatase was determined. a high extent of homology (85%) between bovine and seal alkaline phosphatases was demonstrated. 3. by chemical modification lysine, dicarboxylic acids, arginine and tyrosine residues of tet ... | 1989 | 2706930 |
| thermoregulatory control of expired air temperature in diving harp seals. | expired air temperature (tex), metabolic rate (mr), and skin (ts) and body (tb; rectal) temperatures were recorded in four or five young (1-2 yr) harp seals (phoca groenlandica) in air [mean air temperature (ta) = -30, -10, or 10 degrees c] and in water [mean water temperature (tw) = 2.3 or 24.8 degrees c, with ta = -30, -10, 0, or 10 degrees c]. apparent lower critical temperature was below -10 degrees c in air. above this ta, mean mr was 5.85 w.kg-0.75 (2.23 w.kg-1), while mean mr was 12.56 w. ... | 1989 | 2764154 |
| [various properties of angiotensin-converting enzyme from the seal phoca groenlandica]. | it was found that the molecular mass of the angiotensin-converting enzyme from seal (phoca groenlandica) lungs determined by electrophoresis in 7.5% paag in the presence of sodium dodecyl sulfate is 150 kd. the enzyme has a ph optimum with respect to hippuryl-l-histidyl-l-leucine at 7.3--7.5; km is 1.2 mm. the enzyme is inhibited by the substrate to form a nonproductive es2 complex with the dissociation constant (ks') of 4.8 mm. the activation of the seal angiotensin-converting enzyme in the pre ... | 1987 | 2833935 |
| blood levels of thyroid hormones and certain metabolites in relation to moult in the harp seal (phoca groenlandica). | 1. changes in blood levels of thyroxine (t4), triiodothyronine (t3), free fatty acids (ffa), glucose, pyruvic acid and lactic acid in the harp seal during moult, were studied. 2. serum levels of both t4 and t3 showed significant increase in the moult phase from that in the pre-moult phase. while t4 level continued to remain high during the early and late post-moult phases, t3 level dropped in the latter two phases to the same low pre-moult level. 3. the t3/t4 ratio was significantly higher durin ... | 1987 | 2892641 |
| bile acids from the harp seals, phoca groenlandica. | 1. the bile acids composition of the harp seal, phoca groenlandica, collected around newfoundland, canada, had been examined. 2. 13c n.m.r. spectroscopy of the crude bile extract was superior to t.l.c. analysis in revealing the presence of phocaecholic acid and a taurine moiety in this mixture. 3. the relative percentage of cholic, phocaecholic and chenodeoxycholic acids was 60.5% (+/- 4.5), 21.4% (+/- 4.0) and 18.1% (+/- 5.8), respectively. 4. the variation in the percentage of bile acids did n ... | 1988 | 2896093 |
| did virus transfer from harp seals to common seals? | 1988 | 3185716 | |
| kinematics and estimated thrust production of swimming harp and ringed seals. | the propulsive motions of swimming harp seals (phoca groenlandica erxleben) and ringed seals (phoca hispida schreber) were studied by filming individuals in a flume. the seals swam at velocities ranging from 0.6 to 1.42 m s-1. locomotion was accomplished with alternate lateral sweeps of the hind flippers generated by lateral flexions of the axial body in conjunction with flexion of the flippers. the frequency of the propulsive cycle increased linearly with the swimming velocity, and the maximum ... | 1988 | 3209965 |
| purification and characterization of intestinal alkaline phosphatase from harp seal. | 1. alkaline phosphatase (ec 3.1.3.1.) from harp seal (phagophilus groenlandicus) has been purified by concanavalin a-sepharose chromatography to homogeneity with a specific activity of 1200-1500 units/mg of protein. 2. the mol. wt of the enzyme and its subunits were estimated as 260,000 and 70,000, respectively. by chromatofocusing the isoelectric point of this enzyme is 5.5. 3. with p-nitrophenylphosphate, ph-optimum and km for the enzyme are 9.8 and 0.9 mm, respectively. 4. the enzyme was stro ... | 1988 | 3248366 |
| regulation of animal experimentation: canada's program of voluntary control. | the canadian council on animal care (ccac), is an autonomous advisory and supervisory body responsible for surveillance of experimental animal care and use in canada's universities, government laboratories and pharmaceutical houses. its 20-organization membership includes representatives of government, industry, academia and the humane movement. ccac's voluntary peer review program depends heavily on institutional animal care committees who evaluate the ethical aspects of animal study protocols, ... | 1986 | 3548220 |
| effects of solar radiation and windchill on skin temperature of the harp seal, pagophilus groenlandicus (erxleben, 1777). | 1973 | 4145767 | |
| the lipid composition of the blood of marine mammals. i. young elephant seals, mirounga augustirostris and harp seals, pagophilus groenlandicus. | 1970 | 4316691 | |
| the harp seal, pagophilus groenlandicus, (erxleben, 1777): xvi epiphyseal fusion. | 1972 | 4332521 | |
| wavelength-dependent solar heating of harp seals (pagophilus groenlandicus). | 1971 | 4401107 | |
| histoplasmosis in a harp seal. | 1974 | 4426861 | |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). xxi. the structure of the vestibular apparatus. | 2015 | 4539353 | |
| observations on the anatomy of the respiratory system of the river otter, sea otter, and harp seal. i. the topography, weight, and measurements of the lungs. | 1973 | 4694943 | |
| observations on the anatomy of the respiratory system of the river otter, sea otter, and harp seal. ii. the trachea and bronchial tree. | 1973 | 4694944 | |
| the harp seal, pagophilus groenlandicus, (erxleben 1777). xiv. the gross and microscopic structure of the middle ear. | 1973 | 4711823 | |
| hemoglobin of the harp seal (phagophilus groenlandicus, erxleben, 1777): zone electrophoresis and isoelectric focusing. | 1973 | 4712874 | |
| hemoglobin of the harp seal (pagophilus groenlandicus, erxleben, 1777): zone electrophoresis and isoelectric focusing. | 1973 | 4717471 | |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). xxv. ultrastructure and metabolic adaptation of skeletal muscle. | 1973 | 4750283 | |
| fatty acid composition of the harp seal, pagophilus groenlandicus (phoca groenlandica). | 1974 | 4810366 | |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). 13. the gross and microscopic structure of the auditory meatus. | 1971 | 4925895 | |
| experimental thiamine deficiency in captive harp seals, phoca groenlandica, induced by eating herring, clupea harengus, and smelts, osmerus mordax. | 1972 | 5017320 | |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). 3. the underwater audiogram. | 1972 | 5027182 | |
| anesthesia of the harp seal. | 1972 | 5049122 | |
| locomotory patterns and external morphology of the river otter, sea otter, and harp seal (mammalia). | 1972 | 5055119 | |
| the harp seal, pagophilus groenlandicus (erxleben 1777). xxiii. spectral sensitivity. | 1972 | 5075731 | |
| differences in the fatty acid compositions of blubber fats from northwestern atlantic finwhales (balaenoptera physalus) and harp seals (pagophilus groenlandica). | 1971 | 5133341 | |
| seal milk. ii. harp seal (pagophilus groenlandicus) milk: effects of stage of lactation on the composition of the milk. | 1971 | 5165369 | |
| seal milk. i. harp seal (pagophilus groenlandicus) milk: composition and pesticide residue content. | 1969 | 5378699 | |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). v. levels of haemoglobin, iron, certain metabolites and enzymes in the blood. | 1969 | 5378700 | |
| strontium-90 and cesium-137 levels in tissues of fin whale (balaenoptera physalus) and harp seal (pagophilus groenlandicus). | 1970 | 5415444 | |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). vi. structure of retina. | 1970 | 5415453 | |
| refraction of the harp seal, pagophilus groenlandicus (erxleben 1777). | 1970 | 5422631 | |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). xi. contracaecum sp. infestation in a harp seal. case history. | 1970 | 5463791 | |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). xii. stapphylcoccal granulomas (botryomycosis) in harp seals. | 1970 | 5463792 | |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). i. methods of handling, molt, and diseases in captivity. | 1970 | 5528603 | |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). vii. a histophysiological study of certain skeletal muscles. | 1971 | 5543175 | |
| the harp seal, pagophilus groenlandicus (erxleben, 1777). x. the air audiogram. | 1971 | 5575662 | |
| insulative changes in the harp seal pup during moulting. | 1968 | 5735623 | |
| tissue sources and clinical application of four enzymes in phocid seals. | tissue distribution and plasma activity values of creatine kinase (ck), aldolase (als), gamma-glutamyltransferase (ggt), and leucine aminopeptidase (lap) were determined in 6 ringed seals, phoca hispida, and in 7 harp seals, p groenlandica. muscle tissues had the highest activity of ck and als, though high activity of als was also in most other tissues. the lap and ggt were mostly concentrated in the kidneys; tissue lap activity was generally low. reference plasma values were determined in 17 ri ... | 1981 | 6114694 |
| purification and characterization of a chymosinlike protease from the gastric mucosa of harp seal (pagophilus groenlandicus). | four zymogens of acidic proteases a, b, c, and d were isolated from the gastric mucosa of harp seals by ion-exchange chromatography on a diethylaminoethyl-sephadex a-50 column. the major zymogens were a and c, and the ratio of zymogen a to zymogen c was greater in extracts from 1-week-old animals than in extracts from adult animals. zymogens a and c were further purified by affinity chromatography using carbobenzoxy-d-phenylalaninetriethylene tetramine sepharose and gel filtration on a sephadex ... | 1984 | 6437645 |
| pollutants in harp seals (phoca groenlandica). i. organochlorines. | between 1976 and 1978, 248 harp seals were sampled from 5 locations in the northwest atlantic and arctic for organochlorine (oc) residue analysis in tissue. blood, kidney, brain, muscle and blubber samples were analysed for pcb, ddt, dieldrin, hexachlorobenzene (hcb), and heptachlor epoxide. levels were generally greatest in blubber tissue. overall, mean levels of ddt and pcb were greater than those of other oc. a barrier prevented oc compounds from accumulating in the brain to the level one mig ... | 1984 | 6441253 |
| pollutants in harp seals (phoca groenlandica). ii. heavy metals and selenium. | between 1976 and 1978, 249 harp seals were sampled from five locations in the northwest atlantic and arctic for heavy metal and selenium residue analyses in tissue. significant loading was apparent only in blood, brain, kidney, liver and muscle. samples were analysed for mercury (hg), selenium (se), copper (cu), cadmium (cd) and lead (pb). the seals carried higher levels of cd than of the other metals. residue levels of cd were highest in kidney tissue; levels of other metals were highest in liv ... | 1984 | 6523119 |
| dimensional analysis and dynamic response characterization of mammalian peripheral vestibular structures. | extensive morphometric measurements were made on the vestibular system of the rabbit ( oryctulagus cuniculus), the gerbil (meriones unguiculatus), the chinchilla (chinchilla laniger ), and the squirrel monkey (saimiri sciureus) from serial sections of temporal bones. additionally, a more limited set of measurements were also completed on the owl monkey (aotus trivirgatus), the capuchin monkey (cebus sp.), the harp seal ( pagophilus groenlandicus erxleben , 1777), and the two-toed sloth ( choloep ... | 1984 | 6609629 |
| distribution and size of boettcher cells in the little brown bat, rabbit, and other species. | the distribution and size of boettcher cells were determined from serial sections of the temporal bones of four little brown bats and six rabbits. in addition, one harp seal and one two-toed sloth were examined. in the little brown bat, the heights of the boettcher cells measured 4-8 micron and they were found throughout much of the length of the cochlea. there were four rows in most of the lower basal coil, five rows in the upper basal coil, and four rows in the middle coil. in the rabbit there ... | 1983 | 6670760 |
| total mercury content of meat and liver from inshore newfoundland-caught harp seal (phoca groenlandica). | 1983 | 6831069 | |
| electrophoretic variation in large mammals. iii. the ringed seal, pusa hispida, the harp seal, pagophilus groenlandicus, and the hooded seal, cystophora cristata. | 1982 | 7129942 | |
| notes on the anatomy of the heart in the harp seal (pagophilus groenlandicus erxleben, 1777). | the heart of the harp seal (pagophilus groenlandicus) is described based on the dissection of six specimens of both sexes ranging in body weight from 23.2 to 46.4 kg. the heart is characterized, as in other seals, by a transverse broadness and a flatness of the ventricles along with an apex formed by both ventricles. heart parameters are used for comparisons with those of other seals and land mammals. the heart width index (heart height/heart circumference) averages 33.4 compared to 28.7 for the ... | 1982 | 7180383 |
| neonatal growth of northwest atlantic harp seals. pagophilus groenlandicus. | 1980 | 7217791 | |
| adaptive hormone changes in harp seals, phoca groenlandica, and gray seals, halichoerus grypus, during the postnatal period. | 1980 | 7372092 | |
| pineal and thyroid functions in newborn seals. | daily variations of pineal and plasma melatonin and plasma thyroid hormones were measured in harp seals (phoca groenlandica), grey seals (halichoerus grypus), and hooded seals (cystophora cristata), ranging in age from newborn to 14 days. in newborn harp seals the mean mass of the pineal gland was 273 mg (+/- 45 sem, n = 11), containing 49 ng (median) melatonin. in newborn, 4- and 10-day-old grey seals, the pineal mass was similar, weighing on average 337 mg (+/- 74, n = 6) and containing 90 ng ... | 1995 | 7628691 |
| using isoelectric focusing to discern enzyme variation in northeast atlantic stocks of the harp seal (phoca groenlandica). | liver and/or muscle samples were collected from harp seals on the breeding and moulting grounds in the white sea area (n = 316) and in the greenland sea (n = 225). of a total of 25 presumptive loci detected by isoelectric focusing on polyacrylamide gels (ifpag), 11 were variable. of these, 4 were polymorphic at the 95% level, another 2 at the 99% level. the study shows that the higher resolving capacity obtained by ifpag, as compared to starch gel electrophoresis, increases the number of electro ... | 1994 | 7737888 |
| determination of levels of polychlorinated dibenzo-p-dioxins, dibenzofurans, biphenyls and pesticides in harp seals from the greenland sea. | the levels of polychlorinated dibenzo-p-dioxins (pcdd), dibenzofurans (pcdf), biphenyls (pcb) and compounds of the ddt group were determined in individual seal blubber and brain samples from ten male and one female harp seals caught in the greenland sea. no data from this region and from harp seals have been reported before. the age of the animals varied between 1 and 18 years. pcdd/pcdf concentrations in the blubber (4-10 pg/g teq wet weight (w.w.), nordic model) were somewhat lower than in rin ... | 1995 | 7899859 |
| herpesvirus in botryomycotic lesions from a harp seal (phoca groenlandica). | 1994 | 8053137 | |
| pseudopregnancy in harp seals (phoca groenlandica). | concentrations of circulating progesterone were monitored in a captive breeding group of harp seals. five females were monitored for 2 years, over which time they either became pregnant (four instances) or displayed an overt pseudopregnancy (five instances). only one female exhibited consecutive pseudopregnancies. in all pseudopregnancies, serum progesterone values were high and remained high until july, which is close to the time when implantation normally occurs. after this time progesterone c ... | 1994 | 8064690 |
| serological investigation of virus infections in harp seals (phoca groenlandica) and hooded seals (cystophora cristata). | 1994 | 8073595 | |
| phocine distemper in a harp seal (phoca groenlandica) from the gulf of st. lawrence, canada. | the first case of phocine distemper in a seal from canadian waters and the first case of clinical phocine distemper in a harp seal, phoca groenlandica, is reported. a two-month-old female harp seal stranded on prince edward island in may 1991. significant clinical findings were lethargy and severe conjunctivitis. pulmonary congestion was the main necropsy finding, and histological lesions included diffuse demyelinating nonsuppurative encephalitis and mild multifocal interstitial pneumonia. acido ... | 1993 | 8445769 |
| levels of alpha-hch, lindane, and enantiomeric ratios of alpha-hch in marine mammals from the northern hemisphere. | the enantiomeric ratios of alpha-hch were determined by chiral gas chromatography in blubber of marine mammals from regions of the northern hemisphere (north sea, baltic sea, arctic and iceland). cetaceans (harbour porpoises and white-beaked dolphins) showed a preferential accumulation of (+)-alpha-hch. in blubber of harbour seals, grey seals and harp seals (+)-alpha-hch was also more abundant than (-)-alpha-hch. hooded seals formed an exception with a (+/-) enantiomeric ratio of alpha-hch < 1. | 1995 | 8528649 |
| energetics of lactation in harp seals (phoca groenlandica) from the gulf of st. lawrence, canada. | this study reports the findings of an integrated, comprehensive analysis of lactation energetics in harp seals conducted using longitudinal measurements of mass, body composition and milk composition from mother-pup pairs in conjunction with water flux measurements in pups. the nursing period of harp seals is a short, intense and relatively efficient period of energy transfer from mothers to pups. the average daily milk intake for pups was 3.65 +/- 0.24 kg which is equivalent to 79.5 mj of energ ... | 1996 | 8870260 |
| amino acid sequences of hemoglobin beta chains of five species of pinnipeds: neophoca cinerea, otaria byronia, eumetopias jubatus, pusa hispida, and pagophilus groenlandica. | pinnipeds (otariidae, odobenidae, and phocidae) in the order carnivora have one or two types (hb i and hb ii) of hemoglobin components. these hemoglobins consist of identical beta chains and different alpha chains. we determined the complete amino acid sequences of the hemoglobin beta chain of three species of otariidae (australian sea lion, south american sea lion, and northern sea lion) and two species of phocidae (ringed seal and harp seal) from intact beta chain and chemical cleavage fragmen ... | 1996 | 8968957 |
| epizootiology of morbillivirus infection in harp, hooded, and ringed seals from the canadian arctic and western atlantic. | using a virus neutralization technique, we found phocine distemper virus (pdv) antibody in 130 (83% of 157) harp seals (phoca groenlandica) from the western north atlantic sampled between 1988 and 1993 inclusive. in contrast, only 44 (24% of 185) hooded seals (cystophora cristata) had antibodies against pdv even though they were sympatric with harp seals and were sampled over a similar period, from 1989 to 1994 inclusive. antibodies occurred in 106 (41%) of 259 ringed seals (phoca hispida); this ... | 1997 | 9027686 |
| volume capacity and contraction control of the seal spleen. | volume changes in the spleens of hooded seals (cystophora cristata) and harp seals (phoca groenlandica) were measured plethysmographically in vitro in response to epinephrine, norepinephrine, isoprenaline, phentolamine, and acetylcholine. dilated spleens contracted forcefully within 1-3 min of alpha-adrenoceptor activation with 1.0-5.0 micrograms epinephrine/kg body mass, whereas stimulation of beta-adrenoceptors and cholinergic receptors had little effect. the mass of dilated hooded seal spleen ... | 1997 | 9173968 |