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Schaefer-model stock assessments can be biased and imprecise because they are fitted to catch rate data (CPUE). However, consideration of life history constraints can improve parameter estimates by shedding light on maximum productivity. Therefore, we applied the methods of McAllister et al. (2001)...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.485.8851 2023-05-15T17:38:22+02:00 by Elasmobranch Fisheries Oral T. R. Hammo Nd J. R. Ellis The Pennsylvania State University CiteSeerX Archives 2002 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.485.8851 http://archive.nafo.int/open/sc/2002/scr02-102.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.485.8851 http://archive.nafo.int/open/sc/2002/scr02-102.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://archive.nafo.int/open/sc/2002/scr02-102.pdf Distribution text 2002 ftciteseerx 2016-01-08T08:11:11Z Schaefer-model stock assessments can be biased and imprecise because they are fitted to catch rate data (CPUE). However, consideration of life history constraints can improve parameter estimates by shedding light on maximum productivity. Therefore, we applied the methods of McAllister et al. (2001) to North-East Atlantic spurdog (Squalus acanthias) by using demographic techniques to convert prior distributions for age-specific fecundity and natural mortality (the latter based on tagging data and assumed constant) to prior distributions for the maximum rate of population growth (r). The priors for r generated in this manner were then used in a Bayesian, Schaefer-model assessment of spurdog, fitted to IBTS survey CPUE data. Thus, assessment results were coherent with life-history constraints; they also suggest the stock is depleted to about 6 % of virgin biomass. Text North East Atlantic Squalus acanthias Unknown McAllister ENVELOPE(-65.882,-65.882,-68.764,-68.764) Schaefer ENVELOPE(166.383,166.383,-71.367,-71.367) |
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English |
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Distribution Elasmobranch Fisheries Oral T. R. Hammo Nd J. R. Ellis by |
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Schaefer-model stock assessments can be biased and imprecise because they are fitted to catch rate data (CPUE). However, consideration of life history constraints can improve parameter estimates by shedding light on maximum productivity. Therefore, we applied the methods of McAllister et al. (2001) to North-East Atlantic spurdog (Squalus acanthias) by using demographic techniques to convert prior distributions for age-specific fecundity and natural mortality (the latter based on tagging data and assumed constant) to prior distributions for the maximum rate of population growth (r). The priors for r generated in this manner were then used in a Bayesian, Schaefer-model assessment of spurdog, fitted to IBTS survey CPUE data. Thus, assessment results were coherent with life-history constraints; they also suggest the stock is depleted to about 6 % of virgin biomass. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Elasmobranch Fisheries Oral T. R. Hammo Nd J. R. Ellis |
author_facet |
Elasmobranch Fisheries Oral T. R. Hammo Nd J. R. Ellis |
author_sort |
Elasmobranch Fisheries Oral |
title |
by |
title_short |
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title_full |
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title_full_unstemmed |
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title_sort |
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publishDate |
2002 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.485.8851 http://archive.nafo.int/open/sc/2002/scr02-102.pdf |
long_lat |
ENVELOPE(-65.882,-65.882,-68.764,-68.764) ENVELOPE(166.383,166.383,-71.367,-71.367) |
geographic |
McAllister Schaefer |
geographic_facet |
McAllister Schaefer |
genre |
North East Atlantic Squalus acanthias |
genre_facet |
North East Atlantic Squalus acanthias |
op_source |
http://archive.nafo.int/open/sc/2002/scr02-102.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.485.8851 http://archive.nafo.int/open/sc/2002/scr02-102.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766138778053771264 |