Do environmental factors affect recruits per spawner anomalies of New England groundfish?
Abstract We evaluated the influence of environmental factors on recruits per spawner (RS) anomalies of 12 New England groundfish stocks. Nonparametric methods were used to analyse time-series of RS anomalies derived from stock-recruitment data in recent assessments. The 12 stocks occur in three geog...
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croxfordunivpr:10.1016/j.icesjms.2005.04.019 2023-11-05T03:42:03+01:00 Do environmental factors affect recruits per spawner anomalies of New England groundfish? Brodziak, Jon O'Brien, Loretta 2005 http://dx.doi.org/10.1016/j.icesjms.2005.04.019 http://academic.oup.com/icesjms/article-pdf/62/7/1394/29124178/62-7-1394.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 62, issue 7, page 1394-1407 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2005 croxfordunivpr https://doi.org/10.1016/j.icesjms.2005.04.019 2023-10-06T10:39:48Z Abstract We evaluated the influence of environmental factors on recruits per spawner (RS) anomalies of 12 New England groundfish stocks. Nonparametric methods were used to analyse time-series of RS anomalies derived from stock-recruitment data in recent assessments. The 12 stocks occur in three geographic regions: the Gulf of Maine (cod Gadus morhua, redfish Sebastes fasciatus, winter flounder Pseudopleuronectes americanus, American plaice Hippoglossoides platessoides, witch flounder Glyptocephalus cynoglossus, and yellowtail flounder Limanda ferruginea), Georges Bank (cod, haddock Melanogrammus aeglefinus, and yellowtail flounder), and Southern New England (summer flounder Paralichthys dentatus, yellowtail flounder, and winter flounder). Randomization tests were applied to detect years when RS anomalies were unusually high or low for comparison with oceanographic conditions such as the 1998 intrusion of Labrador Subarctic Slope water into the Gulf of Maine region. Randomization methods were also used to evaluate the central tendency and dispersion of all RS anomalies across stocks. Average RS anomalies were significantly positive in 1987 across stocks and regions, indicating that environmental forcing was coherent and exceptional in that year. Responses of RS values of individual stocks to lagged and contemporaneous environmental variables such as the North Atlantic Oscillation (NAO) index, water temperature, windstress, and shelf water volume anomalies were evaluated using generalized additive models. Overall, the NAO forward-lagged by 2 years had the largest impact on RS anomalies. This apparent effect is notable because it could provide a leading indicator of RS anomalies for some commercially exploited stocks. In particular, the three primary groundfish stocks on Georges Bank (cod, haddock, and yellowtail flounder) all exhibited positive RS anomalies when the NAO2 variable was positive. Article in Journal/Newspaper Gadus morhua North Atlantic North Atlantic oscillation Subarctic Oxford University Press (via Crossref) ICES Journal of Marine Science 62 7 1394 1407 |
institution |
Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Brodziak, Jon O'Brien, Loretta Do environmental factors affect recruits per spawner anomalies of New England groundfish? |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract We evaluated the influence of environmental factors on recruits per spawner (RS) anomalies of 12 New England groundfish stocks. Nonparametric methods were used to analyse time-series of RS anomalies derived from stock-recruitment data in recent assessments. The 12 stocks occur in three geographic regions: the Gulf of Maine (cod Gadus morhua, redfish Sebastes fasciatus, winter flounder Pseudopleuronectes americanus, American plaice Hippoglossoides platessoides, witch flounder Glyptocephalus cynoglossus, and yellowtail flounder Limanda ferruginea), Georges Bank (cod, haddock Melanogrammus aeglefinus, and yellowtail flounder), and Southern New England (summer flounder Paralichthys dentatus, yellowtail flounder, and winter flounder). Randomization tests were applied to detect years when RS anomalies were unusually high or low for comparison with oceanographic conditions such as the 1998 intrusion of Labrador Subarctic Slope water into the Gulf of Maine region. Randomization methods were also used to evaluate the central tendency and dispersion of all RS anomalies across stocks. Average RS anomalies were significantly positive in 1987 across stocks and regions, indicating that environmental forcing was coherent and exceptional in that year. Responses of RS values of individual stocks to lagged and contemporaneous environmental variables such as the North Atlantic Oscillation (NAO) index, water temperature, windstress, and shelf water volume anomalies were evaluated using generalized additive models. Overall, the NAO forward-lagged by 2 years had the largest impact on RS anomalies. This apparent effect is notable because it could provide a leading indicator of RS anomalies for some commercially exploited stocks. In particular, the three primary groundfish stocks on Georges Bank (cod, haddock, and yellowtail flounder) all exhibited positive RS anomalies when the NAO2 variable was positive. |
format |
Article in Journal/Newspaper |
author |
Brodziak, Jon O'Brien, Loretta |
author_facet |
Brodziak, Jon O'Brien, Loretta |
author_sort |
Brodziak, Jon |
title |
Do environmental factors affect recruits per spawner anomalies of New England groundfish? |
title_short |
Do environmental factors affect recruits per spawner anomalies of New England groundfish? |
title_full |
Do environmental factors affect recruits per spawner anomalies of New England groundfish? |
title_fullStr |
Do environmental factors affect recruits per spawner anomalies of New England groundfish? |
title_full_unstemmed |
Do environmental factors affect recruits per spawner anomalies of New England groundfish? |
title_sort |
do environmental factors affect recruits per spawner anomalies of new england groundfish? |
publisher |
Oxford University Press (OUP) |
publishDate |
2005 |
url |
http://dx.doi.org/10.1016/j.icesjms.2005.04.019 http://academic.oup.com/icesjms/article-pdf/62/7/1394/29124178/62-7-1394.pdf |
genre |
Gadus morhua North Atlantic North Atlantic oscillation Subarctic |
genre_facet |
Gadus morhua North Atlantic North Atlantic oscillation Subarctic |
op_source |
ICES Journal of Marine Science volume 62, issue 7, page 1394-1407 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1016/j.icesjms.2005.04.019 |
container_title |
ICES Journal of Marine Science |
container_volume |
62 |
container_issue |
7 |
container_start_page |
1394 |
op_container_end_page |
1407 |
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1781698915088728064 |