| Popis: |
This paper presents the results of the first attempt to estimate and identify factors influencing individual reproductive success in a fish species, under natural conditions, after the progeny have dispersed from their site of origin. Using family-specific DNA fingerprints, the reproductive success of male smallmouth bass in Lake Opeongo, Ontario was estimated and evaluated at the point when their offspring were fall young-of-the-year (YOY). For the 1992 spring spawning season, we generated family-specific fingerprints using DNA of fry captured from 116 nests in Jones Bay. In the fall of the same year, 283 YOY were captured by electrofishing along the shoreline of the study area. Using DNA obtained from fin tissue, a fingerprint was generated for each fall YOY and compared to the family fingerprints to determine the family of origin. Males were considered successful if at least one of their offspring survived to the fall YOY stage. Although 27.7% of all males who acquired eggs (N = 57) had at least one of... |
Plný text