Size-at-Age in Haddock (Melanogrammus aeglefinus): Application of the Growing Degree-Day (GDD) Metric
While growth variation in fishes is the result of a number of different factors (temperature, food consumption, genetic composition, etc.), temperature has been identified as one controlling factor on fish size-at-age. Thus, variation in size-at-age due to variation in temperature should be explaine...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.554.2745 2023-05-15T17:45:37+02:00 Size-at-Age in Haddock (Melanogrammus aeglefinus): Application of the Growing Degree-Day (GDD) Metric Anna B. Neuheimer Christopher T. Taggart Kenneth T. Frank The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.554.2745 http://www.phys.ocean.dal.ca/~taggart/Publications/neuheimer_etal2008_SeaGrant.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.554.2745 http://www.phys.ocean.dal.ca/~taggart/Publications/neuheimer_etal2008_SeaGrant.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.phys.ocean.dal.ca/~taggart/Publications/neuheimer_etal2008_SeaGrant.pdf text ftciteseerx 2016-01-08T11:42:10Z While growth variation in fishes is the result of a number of different factors (temperature, food consumption, genetic composition, etc.), temperature has been identified as one controlling factor on fish size-at-age. Thus, variation in size-at-age due to variation in temperature should be explained before the other factors are explored. We argue that the relevant metric for explaining temperature-dependent size-at-age variation in most fishes is physiologically relevant temperature; i.e., the thermal integral parameterized as the growing degree-day (GDD, ºC × d) metric. Accordingly, we employ GDD to examine the change in size-at-age (length-at-day, LaD) among eastern Scotian Shelf (Northwest Atlantic Fisheries Organization statistical divisions 4VW) haddock (Melanogrammus aeglefinus) from 1970 through 2003. Significant varia-tion in length-at-day (LaD) among year classes (decline in slopes and intercepts of LaD-at-GDD relations) remains after LaD variation due to GDD (temperature) is explained. The unexplained variation is postulated to be a result of temperature-independent factors such as condition or size-selective fishing or both. 112 Neuheimer et al.—Size-at-Age in Haddock Text Northwest Atlantic Unknown |
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English |
description |
While growth variation in fishes is the result of a number of different factors (temperature, food consumption, genetic composition, etc.), temperature has been identified as one controlling factor on fish size-at-age. Thus, variation in size-at-age due to variation in temperature should be explained before the other factors are explored. We argue that the relevant metric for explaining temperature-dependent size-at-age variation in most fishes is physiologically relevant temperature; i.e., the thermal integral parameterized as the growing degree-day (GDD, ºC × d) metric. Accordingly, we employ GDD to examine the change in size-at-age (length-at-day, LaD) among eastern Scotian Shelf (Northwest Atlantic Fisheries Organization statistical divisions 4VW) haddock (Melanogrammus aeglefinus) from 1970 through 2003. Significant varia-tion in length-at-day (LaD) among year classes (decline in slopes and intercepts of LaD-at-GDD relations) remains after LaD variation due to GDD (temperature) is explained. The unexplained variation is postulated to be a result of temperature-independent factors such as condition or size-selective fishing or both. 112 Neuheimer et al.—Size-at-Age in Haddock |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Anna B. Neuheimer Christopher T. Taggart Kenneth T. Frank |
spellingShingle |
Anna B. Neuheimer Christopher T. Taggart Kenneth T. Frank Size-at-Age in Haddock (Melanogrammus aeglefinus): Application of the Growing Degree-Day (GDD) Metric |
author_facet |
Anna B. Neuheimer Christopher T. Taggart Kenneth T. Frank |
author_sort |
Anna B. Neuheimer |
title |
Size-at-Age in Haddock (Melanogrammus aeglefinus): Application of the Growing Degree-Day (GDD) Metric |
title_short |
Size-at-Age in Haddock (Melanogrammus aeglefinus): Application of the Growing Degree-Day (GDD) Metric |
title_full |
Size-at-Age in Haddock (Melanogrammus aeglefinus): Application of the Growing Degree-Day (GDD) Metric |
title_fullStr |
Size-at-Age in Haddock (Melanogrammus aeglefinus): Application of the Growing Degree-Day (GDD) Metric |
title_full_unstemmed |
Size-at-Age in Haddock (Melanogrammus aeglefinus): Application of the Growing Degree-Day (GDD) Metric |
title_sort |
size-at-age in haddock (melanogrammus aeglefinus): application of the growing degree-day (gdd) metric |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.554.2745 http://www.phys.ocean.dal.ca/~taggart/Publications/neuheimer_etal2008_SeaGrant.pdf |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
http://www.phys.ocean.dal.ca/~taggart/Publications/neuheimer_etal2008_SeaGrant.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.554.2745 http://www.phys.ocean.dal.ca/~taggart/Publications/neuheimer_etal2008_SeaGrant.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766148783592177664 |