Molecular Evaluation of the Mating Dynamics of Snow Crab (Chionoecetes opilio) in the Eastern Bering Sea
ABSTRACT Snow crab (Chionoecetes opilio) in the eastern Bering Sea (EBS) supports a valuable crab fishery that harvests large males. To better understand the potential impact of the presence of snow‐Tanner hybrids (C. opilio × C. bairdi) on snow crab mating dynamics, the maternal lineage of hybrids...
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Wiley
2024-10-01
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| Series: | Ecology and Evolution |
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| Online Access: | https://doi.org/10.1002/ece3.70416 |
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| author | Laura M. Slater William Gaeuman Wei Cheng Gordon H. Kruse Christopher Habicht Douglas Pengilly |
| author_facet | Laura M. Slater William Gaeuman Wei Cheng Gordon H. Kruse Christopher Habicht Douglas Pengilly |
| author_sort | Laura M. Slater |
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| description | ABSTRACT Snow crab (Chionoecetes opilio) in the eastern Bering Sea (EBS) supports a valuable crab fishery that harvests large males. To better understand the potential impact of the presence of snow‐Tanner hybrids (C. opilio × C. bairdi) on snow crab mating dynamics, the maternal lineage of hybrids was evaluated using single nucleotide polymorphisms (SNPs). Contrary to results from a previous study that indicated hybrids result only from crosses between Tanner crab (C. bairdi) males and snow crab females, results from this study showed hybrids result from bidirectional parental crosses. SNP and microsatellite markers were used to evaluate the species and number of males detected as mates in female sperm reserves acquired during mating and as sires among embryos in brooded clutches. The incidence of interspecies mating between female snow crab and Tanner crab or hybrid males was low (2%), suggesting interspecies mating is not currently a pressing fishery management concern. Most females had stored sperm from either a single mate (59%) or two mates (32%), which reflects fewer mates than observed for other snow crab populations. Few females were observed with either no stored sperm (5%) or sperm from three to four mates (4%). Single (82%) or dual (18%) paternity was found among embryos in brooded clutches. Sperm from some mates appeared to be fully utilized for fertilization of the brooded clutch for 35% of females. In contrast to findings for other snow crab populations, no significant differences were detected in the numbers of mates or sires between primiparous and multiparous females. The low extent of polyandry observed may suggest that female snow crab in the EBS have limited mating opportunities, potentially leading to insufficient sperm reserves to fertilize subsequent clutches without remating. |
| format | Article |
| id | doaj-art-b84e8092c1e34c82a26c9d1e6e062dc8 |
| institution | Kabale University |
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| language | English |
| publishDate | 2024-10-01 |
| publisher | Wiley |
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| series | Ecology and Evolution |
| spelling | doaj-art-b84e8092c1e34c82a26c9d1e6e062dc82024-12-20T09:05:59ZengWileyEcology and Evolution2045-77582024-10-011410n/an/a10.1002/ece3.70416Molecular Evaluation of the Mating Dynamics of Snow Crab (Chionoecetes opilio) in the Eastern Bering SeaLaura M. Slater0William Gaeuman1Wei Cheng2Gordon H. Kruse3Christopher Habicht4Douglas Pengilly5College of Fisheries and Ocean Sciences University of Alaska Fairbanks Juneau Alaska USADivision of Commercial Fisheries Alaska Department of Fish and Game (ADF&G) Kodiak Alaska USADivision of Commercial Fisheries, Gene Conservation Laboratory ADF&G Anchorage Alaska USACollege of Fisheries and Ocean Sciences University of Alaska Fairbanks Juneau Alaska USADivision of Commercial Fisheries, Gene Conservation Laboratory ADF&G Anchorage Alaska USADivision of Commercial Fisheries Alaska Department of Fish and Game (ADF&G) Kodiak Alaska USAABSTRACT Snow crab (Chionoecetes opilio) in the eastern Bering Sea (EBS) supports a valuable crab fishery that harvests large males. To better understand the potential impact of the presence of snow‐Tanner hybrids (C. opilio × C. bairdi) on snow crab mating dynamics, the maternal lineage of hybrids was evaluated using single nucleotide polymorphisms (SNPs). Contrary to results from a previous study that indicated hybrids result only from crosses between Tanner crab (C. bairdi) males and snow crab females, results from this study showed hybrids result from bidirectional parental crosses. SNP and microsatellite markers were used to evaluate the species and number of males detected as mates in female sperm reserves acquired during mating and as sires among embryos in brooded clutches. The incidence of interspecies mating between female snow crab and Tanner crab or hybrid males was low (2%), suggesting interspecies mating is not currently a pressing fishery management concern. Most females had stored sperm from either a single mate (59%) or two mates (32%), which reflects fewer mates than observed for other snow crab populations. Few females were observed with either no stored sperm (5%) or sperm from three to four mates (4%). Single (82%) or dual (18%) paternity was found among embryos in brooded clutches. Sperm from some mates appeared to be fully utilized for fertilization of the brooded clutch for 35% of females. In contrast to findings for other snow crab populations, no significant differences were detected in the numbers of mates or sires between primiparous and multiparous females. The low extent of polyandry observed may suggest that female snow crab in the EBS have limited mating opportunities, potentially leading to insufficient sperm reserves to fertilize subsequent clutches without remating.https://doi.org/10.1002/ece3.70416fishery managementhybridsmatingpaternityreproductionsnow crab |
| spellingShingle | Laura M. Slater William Gaeuman Wei Cheng Gordon H. Kruse Christopher Habicht Douglas Pengilly Molecular Evaluation of the Mating Dynamics of Snow Crab (Chionoecetes opilio) in the Eastern Bering Sea Ecology and Evolution fishery management hybrids mating paternity reproduction snow crab |
| title | Molecular Evaluation of the Mating Dynamics of Snow Crab (Chionoecetes opilio) in the Eastern Bering Sea |
| title_full | Molecular Evaluation of the Mating Dynamics of Snow Crab (Chionoecetes opilio) in the Eastern Bering Sea |
| title_fullStr | Molecular Evaluation of the Mating Dynamics of Snow Crab (Chionoecetes opilio) in the Eastern Bering Sea |
| title_full_unstemmed | Molecular Evaluation of the Mating Dynamics of Snow Crab (Chionoecetes opilio) in the Eastern Bering Sea |
| title_short | Molecular Evaluation of the Mating Dynamics of Snow Crab (Chionoecetes opilio) in the Eastern Bering Sea |
| title_sort | molecular evaluation of the mating dynamics of snow crab chionoecetes opilio in the eastern bering sea |
| topic | fishery management hybrids mating paternity reproduction snow crab |
| url | https://doi.org/10.1002/ece3.70416 |
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