title: Pregnancy block in house mice (Mus domesticus) as a function of t-complex genotype: examination of the mate choice and male infanticide hypotheses.
abstract: Pregnancy block, whereby recently mated female mice abort their pregnancies when exposed to novel (strange) males, was studied in house mice (Mus domesticus) differing in t-complex genotype; t-mutations are deleterious and +/t females avoid +/t males as mates. The results of Experiment 1, in which the genotype of the female, stud male, and strange male was systematically varied, showed that pregnancy block was most frequent when the strange male was +/+. Because this effect was not enhanced among +/t females when stud males were +/t, the results cannot clearly be explained by the hypothesis that pregnancy block is a manifestation of mate choice. Moreover, the "strange male" effect in Experiment 1 is unlikely to be a female response correlated with the risk of male infanticide, as +/+ and +/t males did not differ in their infanticidal tendencies (Experiments 2 & 3). Alternative hypotheses, including a modified version of the mate choice hypothesis, are discussed.
authors.affiliation: Institute of Animal Behavior, Rutgers University-Newark, USA. coopersmith@csbn.concordia.ca
authors.forename: C B
authors.initials: CB
authors.lastname: Coopersmith
authors.forename: S
authors.initials: S
authors.lastname: Lenington
mesh_terms: D000034:Abortion, Veterinary / Q000235:genetics*; D000374:Aggression; D000818:Animals; D001143:Arousal / Q000235:genetics; D005260:Female; D006580:Genetic Carrier Screening; D005838:Genotype; D047908:Intracellular Signaling Peptides and Proteins; D008297:Male; D051379:Mice / Q000235:genetics*; D008869:Microtubule-Associated Proteins; D009687:Nuclear Proteins / Q000235:genetics*; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000235:genetics*; D012931:Social Environment; D013735:Testicular Hormones / Q000235:genetics; D044767:Ubiquitin-Protein Ligases; D056427:t-Complex Genome Region
chemical_list: D047908:Intracellular Signaling Peptides and Proteins; D008869:Microtubule-Associated Proteins; D009687:Nuclear Proteins; D013735:Testicular Hormones; C116196:PPP1R11 protein, human; D044767:Ubiquitin-Protein Ligases