Adult female hamsters require long and sustained exposures to heterospecific males to avoid interspecific mating
Tóm tắt
Interspecific mating normally decreases female fitness. In many species, females avoid heterospecific males innately or by imprinting on their parents. Alternatively, adult females could learn to discriminate against heterospecific males after exposure to such males. For example, Syrian hamster (Mesocricetus auratus) females learn to discriminate between conspecific males and Turkish hamster (M. brandti) males during adulthood by exposure to males of both species. Adult females not previously exposed to Turkish hamster males will mate similarly with conspecific and heterospecific males. However, in a previous study we showed that exposure to a heterospecific male and a conspecific male for 8 days led to mating avoidance and aggression towards the heterospecific male. Here we conducted two experiments to investigate how much exposure to the heterospecific male was required for females to avoid mating with the heterospecific male (Experiment 1) and how long that avoidance lasted in the absence of continuous exposure to heterospecific stimuli (Experiment 2). Fast and durable learning would indicate the evolution of an efficient avoidance response. In Experiment 1, females were exposed to a heterospecific male for 1, 4 h, 4 or 8 days and then paired with that male. We found more avoidance of interspecific mating after 4 or 8 days of exposure than after 1 or 4 h of exposure. In Experiment 2, females were exposed to a heterospecific male for 8 days and then paired with that male either 10 min later or 8 days later. We found that after an 8-day delay females were highly sexually receptive to the heterospecific male. Additionally, a comparison between the current experiments and a previous study indicates that female Syrian hamsters do not require concurrent exposure to a conspecific male and a heterospecific male to learn to avoid interspecific mating; exposure to a heterospecific male is sufficient.
Tài liệu tham khảo
Andersson M (1994) Sexual selection. Princeton University Press, Princeton
Bergman A, Feldman MW (1995) On the evolution of learning: representation of a stochastic environment. Theor Popul Biol 48:251–276
delBarco-Trillo J, Johnston RE (2010) Fluoxetine does not prevent interspecific mating between two hamster species. Physiol Behav 99:684–686
delBarco-Trillo J, Gulewicz K, Johnston RE (2009a) Medial amygdala involvement in discrimination of same-species and closely-related-species male stimuli in estrous female Mesocricetus hamsters. Behav Neurosci 123:758–763
delBarco-Trillo J, Gulewicz K, Segal A, McPhee ME, Johnston RE (2009b) Can captivity lead to inter-species mating in two Mesocricetus hamster species? J Zool 278:308–312
delBarco-Trillo J, McPhee ME, Johnston RE (2010) Adult female hamsters avoid interspecific mating after exposure to heterospecific males. Behav Ecol Sociobiol 64:1247–1253
Dukas R (2004) Male fruit flies learn to avoid interspecific courtship. Behav Ecol 15:695–698
Dukas R (2008) Learning decreases heterospecific courtship and mating in fruit flies. Biol Lett 4:645–647
Dukas R (2009) Dynamics of learning in the context of courtship in Drosophila persimilis and D. pseudoobscura. Anim Behav 77:253–259
Gattermann R, Fritzsche P, Neumann K, Al-Hussein I, Kayser A, Abiad M, Yakti R (2001) Notes on the current distribution and the ecology of wild golden hamsters (Mesocricetus auratus). J Zool 254:359–365
Gröning J, Hochkirch A (2008) Reproductive interference between animal species. Q Rev Biol 83:257–282
Hamar M, Schutowa M (1966) Neue daten über die geographische veränderlichkeit und die entwicklung der gattung Mesocricetus Nehring, 1898 (Glires, Mammalia). Z Saeugetierkunde 31:237–251
Haskins CP, Haskins EF (1949) The role of sexual selection as an isolating mechanism in three species of poeciliid fishes. Evolution 3:160–169
Hebets EA (2007) Subadult female experience does not influence species recognition in the wolf spider Schizocosa uetzi stratton 1997. J Arachnol 35:1–10
Irwin DE, Price T (1999) Sexual imprinting, learning and speciation. Heredity 82:347–354
Johnston RE (1993) Memory for individual scent in hamsters (Mesocricetus auratus) as assessed by habituation methods. J Comp Psychol 107:201–207
Johnston RE, Peng A (2008) Memory for individuals: hamsters (Mesocricetus auratus) require contact to develop multicomponent representations (concepts) of others. J Comp Psychol 122:121–131
Kandul NP, Wright KM, Kandul EV, Noor MAF (2006) No evidence for learned mating discrimination in male Drosophila pseudoobscura. BMC Evol Biol 6:54
Liley NR (1966) Ethological isolating mechanisms in four sympatric species of poeciliid fishes. Behav Suppl 13:1–197
Lisk RD (1985) The estrous cycle. In: Siegel HI (ed) The hamster: reproduction and behavior. Plenum Press, New York, pp 23–51
Magurran AE, Ramnarine IW (2004) Learned mate recognition and reproductive isolation in guppies. Anim Behav 67:1077–1082
Magurran AE, Ramnarine IW (2005) Evolution of mate discrimination in a fish. Curr Biol 15:R867–R868
Meredith M, Westberry JM (2004) Distinctive responses in the medial amygdala to same-species and different-species pheromones. J Neurosci 24:5719–5725
Mucignat-Caretta C, Colivicchi MA, Fattori M, Ballini C, Bianchi L, Gabai G, Cavaggioni A, Della Corte L (2006) Species-specific chemosignals evoke delayed excitacion of the vomeronasal amygdale in freely-moving female rats. J Neurochem 99:881–891
Murphy MR (1977) Intraspecific sexual preferences of female hamsters. J Comp Physiol Psychol 91:1337–1346
Neumann K, Michaux J, Lebedev V, Yigit N, Colak E, Ivanova N, Poltoraus A, Surov A, Markov G, Maak S, Neumann S, Gattermann R (2006) Molecular phylogeny of the cricetinae subfamily based on the mitochondrial cytochrome b and 12S rRNA genes and the nuclear vWF gene. Mol Phylogenet Evol 39:135–148
Servedio M, Sæther S, Sætre G-P (2009) Reinforcement and learning. Evol Ecol 23:109–123
Todd NB, Nixon CW, Mulvaney DA, Connelly ME (1972) Karyotypes of Mesocricetus brandti and hybridization within the genus. J Hered 63:73–77