Biomaterial Database

Failure of strange females to cause pregnancy block in collared lemmings, Dicrostonyx groenlandicus. 1985

R J Brooks, and M A Donald, and L Schwarzkopf

The effects of exposure to unfamiliar females on pregnancy success of recently mated females were examined in collared lemmings (Dicrostonyx groenlandicus). Four days after mating, females in their home cage were exposed to strange, female intruders that were either nonpregnant or 16 days pregnant. Other recently mated females were introduced to the home cage of 16-day-pregnant females. Pregnancy success of the recently mated females was not reduced in any of these treatments. In the paired encounters, there was no relationship between dominance status and pregnancy status, nor between dominance and pregnancy success. These results do not support the hypothesis that in species in which females are aggressive and readily commit infanticide, unfamiliar females should cause other females to terminate early-stage pregnancies.

UI	MeSH Term	Description	Entries
D008098	Litter Size	The number of offspring produced at one birth by a viviparous animal.	Litter Sizes,Size, Litter,Sizes, Litter
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D003411	Arvicolinae	A subfamily of MURIDAE found nearly world-wide and consisting of about 20 genera. Voles, lemmings, and muskrats are members.	Clethrionomys,Cricetidae,Dicrostonyx,Lemmings,Lemmus,Mice, Red-Backed,Microtinae,Microtus,Muskrats,Ondatra,Voles,Arvicolines,Microtines,Mouse, Red-Backed,Myodes,Ondatra zibethicus,Arvicoline,Lemming,Mice, Red Backed,Microtine,Mouse, Red Backed,Muskrat,Red-Backed Mice,Red-Backed Mouse,Vole
D005260	Female		Females
D000022	Abortion, Spontaneous	Expulsion of the product of FERTILIZATION before completing the term of GESTATION and without deliberate interference.	Abortion, Tubal,Early Pregnancy Loss,Miscarriage,Spontaneous Abortion,Abortions, Spontaneous,Abortions, Tubal,Early Pregnancy Losses,Loss, Early Pregnancy,Losses, Early Pregnancy,Miscarriages,Pregnancy Loss, Early,Pregnancy Losses, Early,Spontaneous Abortions,Tubal Abortion,Tubal Abortions
D000220	Adaptation, Biological	Changes in biological features that help an organism cope with its ENVIRONMENT. These changes include physiological (ADAPTATION, PHYSIOLOGICAL), phenotypic and genetic changes.	Adaptation, Biologic,Biological Adaptation,Biologic Adaptation
D000374	Aggression	Behavior which may be manifested by destructive and attacking action which is verbal or physical, by covert attitudes of hostility or by obstructionism.	Aggressions
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012930	Social Dominance	Social structure of a group as it relates to the relative social rank of dominance status of its members. (APA, Thesaurus of Psychological Index Terms, 8th ed.)	Dominance Hierarchy,Dominance, Social,Dominance Hierarchies,Hierarchy, Dominance
D047108	Embryonic Development	Morphological and physiological development of EMBRYOS.	Embryo Development,Embryogenesis,Postimplantation Embryo Development,Preimplantation Embryo Development,Embryonic Programming,Post-implantation Embryo Development,Postnidation Embryo Development,Postnidation Embryo Development, Animal,Pre-implantation Embryo Development,Prenidation Embryo Development, Animal,Development, Embryo,Development, Embryonic,Development, Postnidation Embryo,Embryo Development, Post-implantation,Embryo Development, Postimplantation,Embryo Development, Postnidation,Embryo Development, Pre-implantation,Embryo Development, Preimplantation,Embryonic Developments,Embryonic Programmings,Post implantation Embryo Development,Pre implantation Embryo Development