Pubblicazione scientifica

Genetic mating system and mate selection in smallmouth bass

FILONE TECNOLOGICO	TEMA
economia circolare e sostenibilità
produzione e cattura

RIASSUNTO

Abstract

Mating systems are an important factor influencing the variance in reproductive success among individuals within natural populations and thus have important ecological and evolutionary implications. We used molecular pedigree reconstruction techniques with microsatellite DNA data to characterize the genetic mating system and mate selection in adult smallmouth bass spawning in Lake Opeongo. The genetic mating system of smallmouth bass in this system can be characterized as predominantly monogamous with a low rate of polygynandry particularly among larger individuals. Iteroparous individuals showed a complete absence of interannual mate fidelity, presumably due to the low annual return rate of spawning adults. Within a season, individuals from both sexes pursued additional mating opportunities with males showing greater variance in mate number than females. Female mate selection appeared to be largely random with little evidence for elevated levels of inbreeding in this population. Multiple mating females pursued additional males to whom they were less related than the first male with which they spawned within a given season, however, this pattern varied among years. The mating pattern observed in this population would likely limit the strength of sexual selection and thus could account for the lack of sexual dimorphism and the absence of alternative reproductive tactics in this species.

DATA

Data di pubblicazione: 20/09/2017

AUTORI

FRANCKOWIAK RYAN P
RIDGWAY MARK S
WILSON CHRIS C

ENTE DI AFFERENZA

ENVIRONMENTAL & LIFE SCIENCES GRADUATE PROGRAM TRENT UNIV PETERBOROUGH ON CANADA
HARKNESS LAB OF FISHERIES RSCH ONTARIO MINST NATURAL RESOURCES & FORESTRY AQUATIC RSCH & MONITORING SECTION TRENT UNIV PETERBOROUGH ON CANADA
CONSERVATION & GENETICS LAB ONTARIO MINST NATURAL RESOURCES & FORESTRY AQUATIC RSCH & MONITORING SECTION TRENT UNIV PETERBOROUGH ON CANADA

RIVISTA

Ecology and Evolution, 7(21), 8864-8875

IMPACT FACTOR

2,540

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