| cuterebrid parasitism (rogenhofera bonaerensis) on the shrubland mouse (akodon molinae), in argentina. | we evaluated the influence of temperature, rainfall, and host relative abundance on rogenhofera bonaerensis (diptera, cuterebridae) parasitism prevalence in shrubland mouse (akodon molinae) populations in central argentina, from february 1983 to december 1987. parasitism did not vary significantly with host age: juvenile-subadults (32%), adults (26%), and old adults (29%). females were more frequently parasitized (36%) than were males (20%). there was no correlation between parasitism and reprod ... | 1992 | 1474666 |
| epidemiology of argentine hemorrhagic fever. | present knowledge points to horizontal transmission as the most significant mechanism for junín virus maintenance in the main natural reservoirs, namely calomys musculinus and calomys laucha. the existence of naturally infected akodon azarae, both within and outside the endemic area, as well as the finding that other species, ecologically and phylogenetically related to the main reservoirs, such as akodon molinae and calomys callidus, can experimentally develop persistent infections with virus s ... | 1988 | 2841151 |
| experimental infection of akodon molinae (rodentia, cricetidae) with junín virus. | experimental infection with the xj-clone 3 strain of junín virus in laboratory bred akodon molinae, a cricetid rodent inhabiting the borders of endemic argentine hemorrhagic fever areas, was studied. suckling animals inoculated intracerebrally proved sensitive and became chronically infected. sixty percent of the rodents showed neurologic involvement, with mortality reaching 60%. virus was recovered from the brain at 7, 15, 21, 37, and 57 days postinfection (pi). by immunofluorescence (if), vira ... | 1986 | 3009705 |
| liver chromatin fractions in mus and akodon. the concept of constitutive heterochromatin. | the liver chromatin from mus musculus and akodon molinae was separated in 8 fractions by differential centrifugation. like fractions from both species showed approximately similar contents of dna, equivalent ratios of histone to non-histone proteins, corresponding template activities and equal amounts of positive c-banded material. on the other hand, heavy chromatin fractions of mus were highly enriched in satellite dna whereas no satellite dna was found in akodon chromatin. heavy chromatin frac ... | 1981 | 6166845 |
| akodon molinae (rodentia cricetidae), a new laboratory animal: breeding, management and reproductive performance. | akodon molinae, a vole mouse widely distributed in central argentina, shows remarkable chromosome polymorphisms. it is one of the natural reservoirs of the aetiologic agent of haemorrhagic fever, and a laboratory colony could be of great help in investigating this disease. pregnancy lasted 23 (range 21-25) days. litters of 4-5 young were born to monogamous breeding pairs about every 30 days, with weaning at 26 days post partum. the sex ratio at birth was 505 males to 500 females: at weaning it w ... | 1980 | 7001146 |
| embryo implantation during the short luteal phase of the corn mouse, calomys musculinus, and the apparent lack of a lactational diapause in south american murid rodents. | as the corn mouse, calomys musculinus, has a short luteal phase (2-3 days) that is not prolonged after copulation, it was hypothesized that (i) implantation would occur at the end of this phase, that is, earlier than it occurs in most murid species that have been studied, and (ii) a lactational embryonic diapause would not occur during the luteal phase. these hypotheses were tested in females that had copulated during postpartum oestrus and were either lactating or not lactating. data were recor ... | 2001 | 11427171 |
| american tripanosomiasis: a study on the prevalence of trypanosoma cruzi and trypanosoma cruzi-like organisms in wild rodents in san luis province, argentina. | chagas disease is caused by trypanosoma cruzi. wild and perianthropic mammals maintain the infection/transmission cycle, both in their natural habitat and in the peridomestic area. the aim of this paper was to present the results from a study on wild rodents in the central and northern regions of san luis province, argentina, in order to evaluate the prevalence of this infection. | 2010 | 20563490 |
| unstable chromosome sites and evolutionary rearrangements in akodont rodents (cricetidae). | evolutionary rearrangements producing changes in chromosome 1 of akodon molinae were traced by comparing the g banding patterns of the karyotypes from six species of akodont rodents. it was possible to subdivide chromosome 1 of a. molinae into unstable and stable regions. most of the spontaneous rearrangements of chromosome 1 appearing in passages 116-128 of a continuous line of a. molinae cells (akm line) occurred in the unstable regions which comprise repetitive dna sequences favouring the set ... | 2012 | 3525017 |
| an unusual pattern of copulatory behavior in a south american cricetid rodent: akodon molinae. | we describe the copulatory behavior and the morphology of the male genital tract of a member of a tribe (akodontini) for which no information on copulatory behavior has been available. copulation in akodon molinae is characterized by multiple intromissions with no intravaginal thrusting, a single ejaculation, and a brief lock with the deposit of a plug. this pattern is unusual because of the combination of locking with both multiple intromissions and plugs. the latter combination, and similar st ... | 1990 | 2225764 |
| growth and reproduction of two species of akodon and their hybrids. | growth and reproduction of akodon molinae (a.m.), a. dolores (a.d.) (rodentia: cricetidae), and their hybrids are described. a.d. showed less fertility under animal room conditions, fewer "successful" matings, similar litter sizes, and an altered sex proportion as compared to a.m.; a.d. ovulatory index is supposed to be higher than mean litter size. x-linked lethal gene(s) and chromosome polymorphisms are possible causes of these variations. interspecific crosses showed a marked seasonal (summer ... | 1983 | 6363612 |
| dna of akodon (rodentia, cricetidae). ii. molecular hybridization of repetitive dna sequences. | interspecies repetitive dna homology was studied in akodont rodents related at generic and suprageneric levels. the homology was determined by taking the species akodon molinae as the reference species. the 3h-dna/dna hybridization on filters showed a closer relationship between a. molinae and a. azarae, a. dolores and a. mollis than between a. molinae and bolomys obscurus. these data agree with the taxonomical ranking of the species. the quantity and quality of the hybrid dnas were measured by ... | 1982 | 6762920 |
| cytogenetics of south american akodont rodents (cricetidae). v. segregation of chromosome no. 1 polymorphism in akodon molinae. | akodon molinae is polymorphic with 2n=42, 43, 44, where the metacentric autosome no. 1 is homologous to 2 acrocentrics 1a and 1b. matings between 2n=43 heterozygotes 1/1a, 1b gave a surplus of 1/1 offspring, a moderate reduction of heterozygous and a strong reduction of homozygous 1a, 1b/1a, 1b offspring. the latter type also has a highly reduced fertility. | 1979 | 510469 |
| constitutive heterochromatin g-bands and robertsonian rearrangements in the chromosomes of akodon molinae (rodentia: cricetidae). | | 1973 | 4781374 |
| intraspecies autosomal polymorphism and chromosome replication in akodon molinae (rodentia-cricetidae). | | 1969 | 5356561 |