Morphometry and Gonad Maturity of Male Snow Crab, Chionoecetes opilio
The relationship between chela height (CH) and carapace width (CW) of male snow crab, Chionoecetes opilio, goes through three allometric stages. The "immature stage" (mostly < 34 mm CW) evolves into a "juvenile stage" (34–120 mm CW) through a "juvenile molt" defi...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1992
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Online Access: | http://dx.doi.org/10.1139/f92-271 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-271 |
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crcansciencepubl:10.1139/f92-271 2023-12-17T10:28:49+01:00 Morphometry and Gonad Maturity of Male Snow Crab, Chionoecetes opilio Comeau, Michel Conan, Gérard Y. 1992 http://dx.doi.org/10.1139/f92-271 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-271 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 12, page 2460-2468 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1992 crcansciencepubl https://doi.org/10.1139/f92-271 2023-11-19T13:38:28Z The relationship between chela height (CH) and carapace width (CW) of male snow crab, Chionoecetes opilio, goes through three allometric stages. The "immature stage" (mostly < 34 mm CW) evolves into a "juvenile stage" (34–120 mm CW) through a "juvenile molt" defining a change in allometry marked by an angular point around 34 mm CW. Fifty percent of males reach gonad maturity, defined by the presence of spermatophores inside the vasa deferentia, at an estimated size of 34 mm CW) The third allometric stage, "morphometrically mature," is separated from the juvenile stage by a "molt to morphometric maturity" at sizes ranging from 50 to 120 mm CW. Juvenile males have smaller claws than morphometrically mature males of the same size. This secondary sexual character is justified by a specific behavior of the males holding the pereipods of the female in one chela during precopulatory embrace. Male snow crab efficiently mate in nature with intermolt multiparous females only after reaching morphometric maturity. Therefore, the presence of spermatophores is not the sole determinant factor necessary for male copulation. Juvenile males larger than the minimum legal size of 95 mm CW are harvestable before, they may efficiently mate. Article in Journal/Newspaper Chionoecetes opilio Snow crab Canadian Science Publishing (via Crossref) Vasa ENVELOPE(25.177,25.177,67.587,67.587) Canadian Journal of Fisheries and Aquatic Sciences 49 12 2460 2468 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Comeau, Michel Conan, Gérard Y. Morphometry and Gonad Maturity of Male Snow Crab, Chionoecetes opilio |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
The relationship between chela height (CH) and carapace width (CW) of male snow crab, Chionoecetes opilio, goes through three allometric stages. The "immature stage" (mostly < 34 mm CW) evolves into a "juvenile stage" (34–120 mm CW) through a "juvenile molt" defining a change in allometry marked by an angular point around 34 mm CW. Fifty percent of males reach gonad maturity, defined by the presence of spermatophores inside the vasa deferentia, at an estimated size of 34 mm CW) The third allometric stage, "morphometrically mature," is separated from the juvenile stage by a "molt to morphometric maturity" at sizes ranging from 50 to 120 mm CW. Juvenile males have smaller claws than morphometrically mature males of the same size. This secondary sexual character is justified by a specific behavior of the males holding the pereipods of the female in one chela during precopulatory embrace. Male snow crab efficiently mate in nature with intermolt multiparous females only after reaching morphometric maturity. Therefore, the presence of spermatophores is not the sole determinant factor necessary for male copulation. Juvenile males larger than the minimum legal size of 95 mm CW are harvestable before, they may efficiently mate. |
format |
Article in Journal/Newspaper |
author |
Comeau, Michel Conan, Gérard Y. |
author_facet |
Comeau, Michel Conan, Gérard Y. |
author_sort |
Comeau, Michel |
title |
Morphometry and Gonad Maturity of Male Snow Crab, Chionoecetes opilio |
title_short |
Morphometry and Gonad Maturity of Male Snow Crab, Chionoecetes opilio |
title_full |
Morphometry and Gonad Maturity of Male Snow Crab, Chionoecetes opilio |
title_fullStr |
Morphometry and Gonad Maturity of Male Snow Crab, Chionoecetes opilio |
title_full_unstemmed |
Morphometry and Gonad Maturity of Male Snow Crab, Chionoecetes opilio |
title_sort |
morphometry and gonad maturity of male snow crab, chionoecetes opilio |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/f92-271 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-271 |
long_lat |
ENVELOPE(25.177,25.177,67.587,67.587) |
geographic |
Vasa |
geographic_facet |
Vasa |
genre |
Chionoecetes opilio Snow crab |
genre_facet |
Chionoecetes opilio Snow crab |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 12, page 2460-2468 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f92-271 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
49 |
container_issue |
12 |
container_start_page |
2460 |
op_container_end_page |
2468 |
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1785581002955948032 |