Estimability of natural mortality and other population parameters in a length-based model: Pandalus borealis in Kachemak Bay, Alaska
Because stock-assessment models have become more complex, the question of estimability of population parameters is important. We conducted simulation-estimation experiments with a length-based model of the pink shrimp (Pandalus borealis Krøyer) population in Kachemak Bay, Alaska, to compare the robu...
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crcansciencepubl:10.1139/f00-220 2023-12-17T10:32:38+01:00 Estimability of natural mortality and other population parameters in a length-based model: Pandalus borealis in Kachemak Bay, Alaska Fu, Caihong Quinn II, Terrance J 2000 http://dx.doi.org/10.1139/f00-220 http://www.nrcresearchpress.com/doi/pdf/10.1139/f00-220 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 57, issue 12, page 2420-2432 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2000 crcansciencepubl https://doi.org/10.1139/f00-220 2023-11-19T13:38:31Z Because stock-assessment models have become more complex, the question of estimability of population parameters is important. We conducted simulation-estimation experiments with a length-based model of the pink shrimp (Pandalus borealis Krøyer) population in Kachemak Bay, Alaska, to compare the robustness of various modeling approaches to specifications of natural mortality (M), catchability (q), a survey gear selectivity parameter (L 50 ), and data imprecision. Our goal was to determine the estimability of various parameters, particularly M, q, and L 50 . Simulation results suggest that interannual variations in M and L 50 could be estimated, if the underlying values have a trend over time. However, parameter q should be fixed at a chosen value, even when it varies over time. Estimated M for the Kachemak Bay P. borealis population increased in the 1980s, perhaps owing to increased predation mortality by groundfish. Article in Journal/Newspaper Kachemak Pandalus borealis Alaska Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 57 12 2420 2432 |
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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 Fu, Caihong Quinn II, Terrance J Estimability of natural mortality and other population parameters in a length-based model: Pandalus borealis in Kachemak Bay, Alaska |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Because stock-assessment models have become more complex, the question of estimability of population parameters is important. We conducted simulation-estimation experiments with a length-based model of the pink shrimp (Pandalus borealis Krøyer) population in Kachemak Bay, Alaska, to compare the robustness of various modeling approaches to specifications of natural mortality (M), catchability (q), a survey gear selectivity parameter (L 50 ), and data imprecision. Our goal was to determine the estimability of various parameters, particularly M, q, and L 50 . Simulation results suggest that interannual variations in M and L 50 could be estimated, if the underlying values have a trend over time. However, parameter q should be fixed at a chosen value, even when it varies over time. Estimated M for the Kachemak Bay P. borealis population increased in the 1980s, perhaps owing to increased predation mortality by groundfish. |
format |
Article in Journal/Newspaper |
author |
Fu, Caihong Quinn II, Terrance J |
author_facet |
Fu, Caihong Quinn II, Terrance J |
author_sort |
Fu, Caihong |
title |
Estimability of natural mortality and other population parameters in a length-based model: Pandalus borealis in Kachemak Bay, Alaska |
title_short |
Estimability of natural mortality and other population parameters in a length-based model: Pandalus borealis in Kachemak Bay, Alaska |
title_full |
Estimability of natural mortality and other population parameters in a length-based model: Pandalus borealis in Kachemak Bay, Alaska |
title_fullStr |
Estimability of natural mortality and other population parameters in a length-based model: Pandalus borealis in Kachemak Bay, Alaska |
title_full_unstemmed |
Estimability of natural mortality and other population parameters in a length-based model: Pandalus borealis in Kachemak Bay, Alaska |
title_sort |
estimability of natural mortality and other population parameters in a length-based model: pandalus borealis in kachemak bay, alaska |
publisher |
Canadian Science Publishing |
publishDate |
2000 |
url |
http://dx.doi.org/10.1139/f00-220 http://www.nrcresearchpress.com/doi/pdf/10.1139/f00-220 |
genre |
Kachemak Pandalus borealis Alaska |
genre_facet |
Kachemak Pandalus borealis Alaska |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 57, issue 12, page 2420-2432 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f00-220 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
57 |
container_issue |
12 |
container_start_page |
2420 |
op_container_end_page |
2432 |
_version_ |
1785586431991742464 |