Zobrazeno 1 - 10
of 89
pro vyhledávání: '"William G. Clark"'
Autor:
William G. Clark
Publikováno v:
Fisheries Research. 248:106203
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c15d21670eb8b82ce3d8e4be5b452ce
https://doi.org/10.1016/j.fishres.2021.106203
https://doi.org/10.1016/j.fishres.2021.106203
Publikováno v:
Fisheries Research. :1-8
A mark-recapture experiment provided a collection of 172 known-age sablefish from Alaska waters. Otoliths from each fish were read by three readers. The readings have a positive bias among young fish and a negative bias among older fish. Among otolit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67692c8c82a24f3dcb3de23b8c890d46
https://doi.org/10.1016/j.fishres.2012.07.004
https://doi.org/10.1016/j.fishres.2012.07.004
Autor:
William G. Clark
Publikováno v:
Fisheries Research. 158:135-137
With large sample sizes, the ratios of the selectivities of two fisheries or surveys at each age or length can be calculated directly (i.e. outside the assessment model) from the age or length compositions of the catches by use of a deterministic equ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ce9746624d69f6cd83d22093268d953
https://doi.org/10.1016/j.fishres.2013.10.017
https://doi.org/10.1016/j.fishres.2013.10.017
Autor:
William G. Clark
Publikováno v:
Natural Resource Modeling. 16:491-503
This is a short history of modeling work done by the staff of the International Pacific Halibut Commission, from the pioneering work of Thompson and Bell through the present.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69adb8390c02a59c114e84abf0191550
https://doi.org/10.1111/j.1939-7445.2003.tb00125.x
https://doi.org/10.1111/j.1939-7445.2003.tb00125.x
Publikováno v:
Annals of the New York Academy of Sciences. 90:637-666
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ad38d8ecb7bdd0406c898b9664e3d04
https://doi.org/10.1111/j.1749-6632.1960.tb26411.x
https://doi.org/10.1111/j.1749-6632.1960.tb26411.x
Autor:
William G. Clark
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 61:1881-1889
With a large enough sample, age misclassification probabilities can be estimated nonparametrically by fitting the observed distribution of differences between paired readings. Application of this procedure to Pacific halibut data reveals that the uns
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d8b7a2d9e5da3ce2db559016a347a5a
https://doi.org/10.1139/f04-122
https://doi.org/10.1139/f04-122
Autor:
William G. Clark, Steven R. Hare
Publikováno v:
North American Journal of Fisheries Management. 24:106-113
Since 1985, the staff of the International Pacific Halibut Commission (IPHC) has used a constant harvest rate policy—currently 20% of exploitable biomass—to estimate the yield currently available from Pacific halibut Hippoglossus stenolepis stock
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b8926ffe5a44b1c603a7b00037a8836
https://doi.org/10.1577/m03-020
https://doi.org/10.1577/m03-020
Autor:
William G. Clark, Steven R. Hare
Publikováno v:
North American Journal of Fisheries Management. 22:852-862
This paper compares long-term changes in the recruitment and growth of Pacific halibut Hippoglossus stenolepis with long-term changes in climate and stock size. It appears that environmental variability—both interdecadal and interannual—is respon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b8bdecaf7e7aeff84e8325c63a375ba
https://doi.org/10.1577/1548-8675(2002)022<0852:eocass>2.0.co
https://doi.org/10.1577/1548-8675(2002)022<0852:eocass>2.0.co
Autor:
William G. Clark
Publikováno v:
North American Journal of Fisheries Management. 22:251-257
This paper reviews the original derivation of the F 35% (later F 40%) harvest strategy, which consists of fishing at a rate that reduces spawning biomass per recruit to 35% (or 40%) of the unfished value, and investigates its applicability to long-li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db118805e0a520a9fe9902d9f670696d
https://doi.org/10.1577/1548-8675(2002)022<0251:frtyl>2.0.co
https://doi.org/10.1577/1548-8675(2002)022<0251:frtyl>2.0.co
Autor:
William G. Clark
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 56:1721-1731
The abundance of many stocks is estimated by fitting an age-structured model to catch-at-age and relative abundance data from the commercial fishery and scientific surveys. The natural mortality rate used in the model is usually estimated externally
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02408c4fed4210c8594e2527dcc7596e
https://doi.org/10.1139/f99-085
https://doi.org/10.1139/f99-085