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- W2024256481 abstract "Reproductive isolation appeared to be complete between pumpkinseeds (Lepomis gibbosus) and bluegills (L. macrochirus) when equal numbers (1:1 sex ratio) were stocked in each of two similar ponds near London, Ontario, and observed during the breeding seasons of 1964 and 1965. Ethological isolation, through visual recognition of potential conspecific mates, was probably the major barrier to hybridization. Interspecific courtship and attempted spawning were not seen; intraspecific courtship and spawning were frequently observed. No clearly identifiable hybrids were found among large numbers of yearling and 2-year-old offspring collected in both ponds in 1965 and 1966.Pumpkinseeds began nesting about 3 weeks before bluegills, but spawning by the two species broadly overlapped in time both years. Individual pumpkinseeds occupied nests for an average of 18.5 days; bluegills for 8.7 days. Duration of pumpkinseed nest occupancy appeared to vary directly with surface water temperature, whether eggs or fry were in the nests or not, whereas bluegills tended to remain on nests containing eggs or fry, regardless of temperature fluctuations. Bluegills nested in deeper water and further from shore than pumpkinseeds, and bluegills tended to nest in colonies whereas pumpkinseeds did not. Interspecific differences were not found in nest site selection with respect to substrate or vegetation." @default.
- W2024256481 created "2016-06-24" @default.
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- W2024256481 date "1967-03-01" @default.
- W2024256481 modified "2023-10-14" @default.
- W2024256481 title "Reproductive Isolation Between the Sunfish <i>Lepomis gibbosus</i> and <i>L</i>. <i>macrochirus</i>" @default.
- W2024256481 doi "https://doi.org/10.1139/f67-044" @default.
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