EEB Seminar: November 16

This week the department is pleased to welcome our very own Ryan Franckowiak.

Reproductive fitness of Micropterus dolomieu under heterogeneous environmental conditions

Ryan.PNG

Identifying the biotic and abiotic factors influencing individual reproductive fitness under natural conditions is essential for understanding important aspects of a species’ evolutionary biology and ecology, population dynamics, and life-history evolution. A reconstructed molecular pedigree for adult smallmouth bass spawning in Lake Opeongo was used to characterize the genetic mating system and mate selection, examine the extent of natal philopatry and the strength and direction of sex-bias dispersal, and assess the inter-annual variance in reproductive success in a large, heterogeneous natural system. A high reproductive skew among breeding adults was observed with the majority of offspring being produced by a relatively small number of spawning adults. The difference in reproductive success among adults was shown to be strongly influenced by summer water temperature, male body size, and, to a lesser extent, fetch. These findings provide key insights into this species reproductive ecology that will improve our ability to understand and predict how populations will likely respond to various biotic and abiotic stressors, management and conservation actions, and global climate change.

The EEB Seminars run weekly, on Thursdays, in the EEB Lounge of the BioSciences Complex, Room 4338, from 12:30-1:30pm.

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