The more the better - polyandry and genetic similarity are positively linked to reproductive success in a natural population of terrestrial salamanders (Salamandra salamandra)
Autor: | Oliver Rupp, Michael Kopp, Barbara A. Caspers, Sebastian Steinfartz, Ralf Hendrix, Katrin Rosentreter, E. Tobias Krause |
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Přispěvatelé: | Institut de Mathématiques de Marseille (I2M), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU) |
Jazyk: | angličtina |
Rok vydání: | 2014 |
Předmět: |
0106 biological sciences
Male Zoology MESH: Reproduction 010603 evolutionary biology 01 natural sciences MESH: Salamandra 03 medical and health sciences Sexual Behavior Animal Spermatheca MESH: Genetic Fitness Fire salamander Germany Genetics Animals MESH: Animals Salamandra Mating MESH: Sexual Behavior Animal Sperm competition MESH: Germany Ecology Evolution Behavior and Systematics reproductive and urinary physiology 030304 developmental biology 0303 health sciences biology Reproductive success Ecology Reproduction [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] MESH: Spermatozoa biology.organism_classification Sperm Spermatozoa MESH: Male Mate choice Fertilization Larva Female MESH: Fertilization Genetic Fitness MESH: Microsatellite Repeats MESH: Female MESH: Larva Microsatellite Repeats |
Zdroj: | Molecular Ecology Molecular Ecology, Wiley, 2014, 23 (1), pp.239-50. ⟨10.1111/mec.12577⟩ Molecular Ecology, 2014, 23 (1), pp.239-50. ⟨10.1111/mec.12577⟩ |
ISSN: | 0962-1083 1365-294X |
Popis: | International audience; Although classically thought to be rare, female polyandry is widespread and may entail significant fitness benefits. If females store sperm over extended periods of time, the consequences of polyandry will depend on the pattern of sperm storage, and some of the potential benefits of polyandry can only be realized if sperm from different males is mixed. Our study aimed to determine patterns and consequences of polyandry in an amphibian species, the fire salamander, under fully natural conditions. Fire salamanders are ideal study objects, because mating, fertilization and larval deposition are temporally decoupled, females store sperm for several months, and larvae are deposited in the order of fertilization. Based on 18 microsatellite loci, we conducted paternity analysis of 24 female-offspring arrays with, in total, over 600 larvae fertilized under complete natural conditions. More than one-third of females were polyandrous and up to four males were found as sires. Our data clearly show that sperm from multiple males is mixed in the female's spermatheca. Nevertheless, paternity is biased, and the most successful male sires on average 70% of the larvae, suggesting a 'topping off' mechanism with first-male precedence. Female reproductive success increased with the number of sires, most probably because multiple mating ensured high fertilization success. In contrast, offspring number was unaffected by female condition and genetic characteristics, but surprisingly, it increased with the degree of genetic relatedness between females and their sires. Sires of polyandrous females tended to be genetically similar to each other, indicating a role for active female choice. |
Databáze: | OpenAIRE |
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