Reproductive Success of Multiparous Female Tanner Crab (Chionoecetes bairdi) Fertilizing Eggs With or Without Recent Access to Males
163–172. doi:10.2960/J.v41.m611 Sperm storage in female crabs is assumed to provide resiliency in population repro-ductive potential for exploited crab stocks with male-only harvest restrictions. However, contrasting results have been reported for the reproductive success of female Tanner crab (Chio...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.487.4282 2023-05-15T16:20:44+02:00 Reproductive Success of Multiparous Female Tanner Crab (Chionoecetes bairdi) Fertilizing Eggs With or Without Recent Access to Males Joel B. Webb The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.4282 http://journal.nafo.int/41/webb/14-webb.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.4282 http://journal.nafo.int/41/webb/14-webb.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://journal.nafo.int/41/webb/14-webb.pdf The Tanner crab (Chionoecetes bairdi (Rathbun text ftciteseerx 2016-01-08T08:16:22Z 163–172. doi:10.2960/J.v41.m611 Sperm storage in female crabs is assumed to provide resiliency in population repro-ductive potential for exploited crab stocks with male-only harvest restrictions. However, contrasting results have been reported for the reproductive success of female Tanner crab (Chionoecetes bairdi) relying on stored sperm for fertilization. Ovigerous multiparous fe-male C. bairdi were collected and held in the laboratory in the absence of males from hatch-ing to extrusion or collected after hatching and extrusion of a subsequent clutch in situ in Glacier Bay, Alaska. Females were classified into two groups based on extrusion site, LE (laboratory) or FE (field). Mating of multiparous females was important for maintenance of reproductive potential as sperm reserves were likely insufficient for full fertilization of an additional egg clutch from stored sperm in 44 % of LE females. High incidence of fresh grasping marks for FE (97%) versus LE (4%) females and significantly higher sperm reserves indicated that most FE females were likely to have recently mated. Mean post-extrusion spermathecal load and sperm cell counts increased significantly from 0.21 to 0.44 g and 2.00 × 107 to 9.35 × 107, respectively, between LE and FE females (p <0.001). Both groups of females extruded clutches of normally developing, viable eggs (>99%), with similar fecundity. Characterization of spatiotemporal trends in mating status, sperm reserves and egg production in C. bairdi may be valuable for understanding natural vari-ability in reproduction and possible fishery effects on population reproductive potential. Text glacier Alaska Chionoecetes bairdi Tanner crab Unknown Glacier Bay |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
topic |
The Tanner crab (Chionoecetes bairdi (Rathbun |
spellingShingle |
The Tanner crab (Chionoecetes bairdi (Rathbun Joel B. Webb Reproductive Success of Multiparous Female Tanner Crab (Chionoecetes bairdi) Fertilizing Eggs With or Without Recent Access to Males |
topic_facet |
The Tanner crab (Chionoecetes bairdi (Rathbun |
description |
163–172. doi:10.2960/J.v41.m611 Sperm storage in female crabs is assumed to provide resiliency in population repro-ductive potential for exploited crab stocks with male-only harvest restrictions. However, contrasting results have been reported for the reproductive success of female Tanner crab (Chionoecetes bairdi) relying on stored sperm for fertilization. Ovigerous multiparous fe-male C. bairdi were collected and held in the laboratory in the absence of males from hatch-ing to extrusion or collected after hatching and extrusion of a subsequent clutch in situ in Glacier Bay, Alaska. Females were classified into two groups based on extrusion site, LE (laboratory) or FE (field). Mating of multiparous females was important for maintenance of reproductive potential as sperm reserves were likely insufficient for full fertilization of an additional egg clutch from stored sperm in 44 % of LE females. High incidence of fresh grasping marks for FE (97%) versus LE (4%) females and significantly higher sperm reserves indicated that most FE females were likely to have recently mated. Mean post-extrusion spermathecal load and sperm cell counts increased significantly from 0.21 to 0.44 g and 2.00 × 107 to 9.35 × 107, respectively, between LE and FE females (p <0.001). Both groups of females extruded clutches of normally developing, viable eggs (>99%), with similar fecundity. Characterization of spatiotemporal trends in mating status, sperm reserves and egg production in C. bairdi may be valuable for understanding natural vari-ability in reproduction and possible fishery effects on population reproductive potential. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Joel B. Webb |
author_facet |
Joel B. Webb |
author_sort |
Joel B. Webb |
title |
Reproductive Success of Multiparous Female Tanner Crab (Chionoecetes bairdi) Fertilizing Eggs With or Without Recent Access to Males |
title_short |
Reproductive Success of Multiparous Female Tanner Crab (Chionoecetes bairdi) Fertilizing Eggs With or Without Recent Access to Males |
title_full |
Reproductive Success of Multiparous Female Tanner Crab (Chionoecetes bairdi) Fertilizing Eggs With or Without Recent Access to Males |
title_fullStr |
Reproductive Success of Multiparous Female Tanner Crab (Chionoecetes bairdi) Fertilizing Eggs With or Without Recent Access to Males |
title_full_unstemmed |
Reproductive Success of Multiparous Female Tanner Crab (Chionoecetes bairdi) Fertilizing Eggs With or Without Recent Access to Males |
title_sort |
reproductive success of multiparous female tanner crab (chionoecetes bairdi) fertilizing eggs with or without recent access to males |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.4282 http://journal.nafo.int/41/webb/14-webb.pdf |
geographic |
Glacier Bay |
geographic_facet |
Glacier Bay |
genre |
glacier Alaska Chionoecetes bairdi Tanner crab |
genre_facet |
glacier Alaska Chionoecetes bairdi Tanner crab |
op_source |
http://journal.nafo.int/41/webb/14-webb.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.4282 http://journal.nafo.int/41/webb/14-webb.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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