Age and growth of spiny dogfish (Squalus acanthias) in the Gulf of Alaska: analysis of alternative growth models
Ten growth models were fitted to age and growth data for spiny dogfish (Squalus acanthias) in the Gulf of Alaska. Previous studies of spiny dogfish growth have all fittedthe t0 formulation of the von Bertalanffy model without examination of alternative models. Among the alternatives, we present a ne...
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ftoceandocs:oai:aquadocs.org:1834/25400 2023-05-15T18:48:35+02:00 Age and growth of spiny dogfish (Squalus acanthias) in the Gulf of Alaska: analysis of alternative growth models Tribuzio, Cindy A. Kruse, Gordon H. Fujioka, Jeffrey T. 2010 application/pdf 119-135 http://hdl.handle.net/1834/25400 en eng http://fishbull.noaa.gov/1082/tribuzio.pdf 0090-0656 http://hdl.handle.net/1834/25400 http://aquaticcommons.org/id/eprint/8751 403 2012-06-11 18:33:47 8751 United States National Marine Fisheries Service Biology Ecology Fisheries article TRUE 2010 ftoceandocs 2023-04-06T17:02:52Z Ten growth models were fitted to age and growth data for spiny dogfish (Squalus acanthias) in the Gulf of Alaska. Previous studies of spiny dogfish growth have all fittedthe t0 formulation of the von Bertalanffy model without examination of alternative models. Among the alternatives, we present a new two-phase von Bertalanffy growth modelformulation with a logistically scaled k parameter and which estimates L0. A total of 1602 dogfish were agedfrom opportunistic collections with longline, rod and reel, set net, and trawling gear in the eastern and centralGulf of Alaska between 2004 and 2007. Ages were estimated from the median band count of three independent readings of the second dorsal spine plus the estimated number of worn bands for worn spines. Owing to a lack of small dogfish in the samples, lengths at age of small individuals were back-calculated from a subsample of 153 dogfish with unworn spines. The von Bertalanffy, two-parameter von Bertalanffy, two-phase von Bertalanffy, Gompertz, two-parameter Gompertz, and logistic models were fitted to length-at-age data for each sex separately, both with and without back-calculated lengths at age. The two-phase von Bertalanffy growth model produced the statistically best fit for both sexes of Gulf of Alaska spiny dogfish, resulting in L∞ = 87.2 and 102.5 cm and k= 0.106 and 0.058 for males and females, respectively. Article in Journal/Newspaper Alaska spiny dogfish Squalus acanthias IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications Gulf of Alaska |
institution |
Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
English |
topic |
Biology Ecology Fisheries |
spellingShingle |
Biology Ecology Fisheries Tribuzio, Cindy A. Kruse, Gordon H. Fujioka, Jeffrey T. Age and growth of spiny dogfish (Squalus acanthias) in the Gulf of Alaska: analysis of alternative growth models |
topic_facet |
Biology Ecology Fisheries |
description |
Ten growth models were fitted to age and growth data for spiny dogfish (Squalus acanthias) in the Gulf of Alaska. Previous studies of spiny dogfish growth have all fittedthe t0 formulation of the von Bertalanffy model without examination of alternative models. Among the alternatives, we present a new two-phase von Bertalanffy growth modelformulation with a logistically scaled k parameter and which estimates L0. A total of 1602 dogfish were agedfrom opportunistic collections with longline, rod and reel, set net, and trawling gear in the eastern and centralGulf of Alaska between 2004 and 2007. Ages were estimated from the median band count of three independent readings of the second dorsal spine plus the estimated number of worn bands for worn spines. Owing to a lack of small dogfish in the samples, lengths at age of small individuals were back-calculated from a subsample of 153 dogfish with unworn spines. The von Bertalanffy, two-parameter von Bertalanffy, two-phase von Bertalanffy, Gompertz, two-parameter Gompertz, and logistic models were fitted to length-at-age data for each sex separately, both with and without back-calculated lengths at age. The two-phase von Bertalanffy growth model produced the statistically best fit for both sexes of Gulf of Alaska spiny dogfish, resulting in L∞ = 87.2 and 102.5 cm and k= 0.106 and 0.058 for males and females, respectively. |
format |
Article in Journal/Newspaper |
author |
Tribuzio, Cindy A. Kruse, Gordon H. Fujioka, Jeffrey T. |
author_facet |
Tribuzio, Cindy A. Kruse, Gordon H. Fujioka, Jeffrey T. |
author_sort |
Tribuzio, Cindy A. |
title |
Age and growth of spiny dogfish (Squalus acanthias) in the Gulf of Alaska: analysis of alternative growth models |
title_short |
Age and growth of spiny dogfish (Squalus acanthias) in the Gulf of Alaska: analysis of alternative growth models |
title_full |
Age and growth of spiny dogfish (Squalus acanthias) in the Gulf of Alaska: analysis of alternative growth models |
title_fullStr |
Age and growth of spiny dogfish (Squalus acanthias) in the Gulf of Alaska: analysis of alternative growth models |
title_full_unstemmed |
Age and growth of spiny dogfish (Squalus acanthias) in the Gulf of Alaska: analysis of alternative growth models |
title_sort |
age and growth of spiny dogfish (squalus acanthias) in the gulf of alaska: analysis of alternative growth models |
publishDate |
2010 |
url |
http://hdl.handle.net/1834/25400 |
geographic |
Gulf of Alaska |
geographic_facet |
Gulf of Alaska |
genre |
Alaska spiny dogfish Squalus acanthias |
genre_facet |
Alaska spiny dogfish Squalus acanthias |
op_source |
http://aquaticcommons.org/id/eprint/8751 403 2012-06-11 18:33:47 8751 United States National Marine Fisheries Service |
op_relation |
http://fishbull.noaa.gov/1082/tribuzio.pdf 0090-0656 http://hdl.handle.net/1834/25400 |
_version_ |
1766241715758301184 |