Maturity and Molt Status of Crustacea: Determining Classification without Prior Criteria
Existing methodology for estimation is reviewed for the situation where, a priori, the existence of two or more groups can be postulated but, in contrast with discriminant analysis, there is no sample in which the correct categories are known. Such mixture models are applied to two data sets related...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
1994
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Online Access: | http://dx.doi.org/10.1139/f94-042 http://www.nrcresearchpress.com/doi/pdf/10.1139/f94-042 |
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crcansciencepubl:10.1139/f94-042 2023-12-17T10:28:49+01:00 Maturity and Molt Status of Crustacea: Determining Classification without Prior Criteria Warren, William G. 1994 http://dx.doi.org/10.1139/f94-042 http://www.nrcresearchpress.com/doi/pdf/10.1139/f94-042 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 51, issue 2, page 408-416 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1994 crcansciencepubl https://doi.org/10.1139/f94-042 2023-11-19T13:39:06Z Existing methodology for estimation is reviewed for the situation where, a priori, the existence of two or more groups can be postulated but, in contrast with discriminant analysis, there is no sample in which the correct categories are known. Such mixture models are applied to two data sets related to the maturity and molt status of snow crab, Chionoecetes opilio, namely (1) the classification of crab as morphometrically mature or immature on the basis of the chela height – carapace width relationship and (2) the determination of the number of molts of crab, during a known period at liberty, from the relationship of size at release and size at recapture of tagged animals, in the latter example, a theoretical constraint is imposed that links the relationships at the different stages. The solution is obtained by "nesting" an iterative procedure within an EM algorithm. The method permits hypotheses concerning the number of groups to be tested, including the hypothesis that the data come from a single homogenous group, and each individual is assigned a probability of belonging to a group. Article in Journal/Newspaper Chionoecetes opilio Snow crab Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 51 2 408 416 |
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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 Warren, William G. Maturity and Molt Status of Crustacea: Determining Classification without Prior Criteria |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Existing methodology for estimation is reviewed for the situation where, a priori, the existence of two or more groups can be postulated but, in contrast with discriminant analysis, there is no sample in which the correct categories are known. Such mixture models are applied to two data sets related to the maturity and molt status of snow crab, Chionoecetes opilio, namely (1) the classification of crab as morphometrically mature or immature on the basis of the chela height – carapace width relationship and (2) the determination of the number of molts of crab, during a known period at liberty, from the relationship of size at release and size at recapture of tagged animals, in the latter example, a theoretical constraint is imposed that links the relationships at the different stages. The solution is obtained by "nesting" an iterative procedure within an EM algorithm. The method permits hypotheses concerning the number of groups to be tested, including the hypothesis that the data come from a single homogenous group, and each individual is assigned a probability of belonging to a group. |
format |
Article in Journal/Newspaper |
author |
Warren, William G. |
author_facet |
Warren, William G. |
author_sort |
Warren, William G. |
title |
Maturity and Molt Status of Crustacea: Determining Classification without Prior Criteria |
title_short |
Maturity and Molt Status of Crustacea: Determining Classification without Prior Criteria |
title_full |
Maturity and Molt Status of Crustacea: Determining Classification without Prior Criteria |
title_fullStr |
Maturity and Molt Status of Crustacea: Determining Classification without Prior Criteria |
title_full_unstemmed |
Maturity and Molt Status of Crustacea: Determining Classification without Prior Criteria |
title_sort |
maturity and molt status of crustacea: determining classification without prior criteria |
publisher |
Canadian Science Publishing |
publishDate |
1994 |
url |
http://dx.doi.org/10.1139/f94-042 http://www.nrcresearchpress.com/doi/pdf/10.1139/f94-042 |
genre |
Chionoecetes opilio Snow crab |
genre_facet |
Chionoecetes opilio Snow crab |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 51, issue 2, page 408-416 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f94-042 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
51 |
container_issue |
2 |
container_start_page |
408 |
op_container_end_page |
416 |
_version_ |
1785581010134499328 |