Paternity patterns in a long-term resident bottlenose dolphin community
Genetic analyses, initiated in 1984, have played a major role in our understanding of the structure and social relationships of the long-term resident community of common bottlenose dolphins (Tursiops truncatus) in Sarasota Bay, Florida (SBDC). One component of our ongoing study of the community’s s...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-02-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2023.1076715/full |
| _version_ | 1797934831378628608 |
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| author | Debbie Duffield Randall Wells |
| author_facet | Debbie Duffield Randall Wells |
| author_sort | Debbie Duffield |
| collection | DOAJ |
| description | Genetic analyses, initiated in 1984, have played a major role in our understanding of the structure and social relationships of the long-term resident community of common bottlenose dolphins (Tursiops truncatus) in Sarasota Bay, Florida (SBDC). One component of our ongoing study of the community’s social system involves using blood samples from periodic catch-and-release sampling for life history and health assessment studies, as well as skin from biopsy dart sampling studies and strandings, to investigate paternity and mating strategies in this community. These analyses, covering a span of four generations of calves, were originally based on chromosomes and protein electrophoresis, but with the advent of microsatellite DNA technology, the latter has become our analysis of choice. We have performed paternity analyses on 204 known mother-calf pairs. For 151 of the calves (74%), sires were identified within the SBDC, but for the remaining 26% of the calves all sampled males associated with the community were excluded and it is likely that a substantial contribution of paternity to the SBDC comes from outside the community. Of the SBDC males, only 52 males of the more than 200 potential sires were sires. The age of sires at time of conception of a calf ranged from 10 to 43 years, averaging 24 years old. These males have sired 1-7 calves during a documented period of reproductive tenure of as much as 24 years (average = 21.4 years). Four males have sired 6-7 calves each, these males siring calves in the community for more than 20 years. Another 19 males have each sired 3-5 calves and the remaining 30 males were identified as sires of 1-2 calves. Paired males sired 75% of the calves while 25% of the calves were sired by unpaired males. Females with multiple offspring generally had multiple sires for these offspring. These paternity analyses support the hypothesis that a major avenue of gene flow in the SBDC is through the males given their greater ranges, with occasional exchange via visits from males from other areas, as well as the occasional brief movements of females from outside the community range into the community. |
| first_indexed | 2024-04-10T18:06:09Z |
| format | Article |
| id | doaj.art-813f0d83fc1e4bed842232ae3837b0c5 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-04-10T18:06:09Z |
| publishDate | 2023-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-813f0d83fc1e4bed842232ae3837b0c52023-02-02T13:10:38ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452023-02-011010.3389/fmars.2023.10767151076715Paternity patterns in a long-term resident bottlenose dolphin communityDebbie Duffield0Randall Wells1Department of Biology, Portland State University, Portland, OR, United StatesChicago Zoological Society’s Sarasota Dolphin Research Program, c/o Mote Marine Laboratory, Sarasota, FL, United StatesGenetic analyses, initiated in 1984, have played a major role in our understanding of the structure and social relationships of the long-term resident community of common bottlenose dolphins (Tursiops truncatus) in Sarasota Bay, Florida (SBDC). One component of our ongoing study of the community’s social system involves using blood samples from periodic catch-and-release sampling for life history and health assessment studies, as well as skin from biopsy dart sampling studies and strandings, to investigate paternity and mating strategies in this community. These analyses, covering a span of four generations of calves, were originally based on chromosomes and protein electrophoresis, but with the advent of microsatellite DNA technology, the latter has become our analysis of choice. We have performed paternity analyses on 204 known mother-calf pairs. For 151 of the calves (74%), sires were identified within the SBDC, but for the remaining 26% of the calves all sampled males associated with the community were excluded and it is likely that a substantial contribution of paternity to the SBDC comes from outside the community. Of the SBDC males, only 52 males of the more than 200 potential sires were sires. The age of sires at time of conception of a calf ranged from 10 to 43 years, averaging 24 years old. These males have sired 1-7 calves during a documented period of reproductive tenure of as much as 24 years (average = 21.4 years). Four males have sired 6-7 calves each, these males siring calves in the community for more than 20 years. Another 19 males have each sired 3-5 calves and the remaining 30 males were identified as sires of 1-2 calves. Paired males sired 75% of the calves while 25% of the calves were sired by unpaired males. Females with multiple offspring generally had multiple sires for these offspring. These paternity analyses support the hypothesis that a major avenue of gene flow in the SBDC is through the males given their greater ranges, with occasional exchange via visits from males from other areas, as well as the occasional brief movements of females from outside the community range into the community.https://www.frontiersin.org/articles/10.3389/fmars.2023.1076715/fullSarasota Bay dolphin communityDNA microsatellitesmale contributionsocial structuremating patternsreproductive success |
| spellingShingle | Debbie Duffield Randall Wells Paternity patterns in a long-term resident bottlenose dolphin community Frontiers in Marine Science Sarasota Bay dolphin community DNA microsatellites male contribution social structure mating patterns reproductive success |
| title | Paternity patterns in a long-term resident bottlenose dolphin community |
| title_full | Paternity patterns in a long-term resident bottlenose dolphin community |
| title_fullStr | Paternity patterns in a long-term resident bottlenose dolphin community |
| title_full_unstemmed | Paternity patterns in a long-term resident bottlenose dolphin community |
| title_short | Paternity patterns in a long-term resident bottlenose dolphin community |
| title_sort | paternity patterns in a long term resident bottlenose dolphin community |
| topic | Sarasota Bay dolphin community DNA microsatellites male contribution social structure mating patterns reproductive success |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2023.1076715/full |
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