Settlement and distribution of Age-0 juvenile cod, Gadus morhua and G. ogac, following a large-scale habitat manipulation
In Bonavista Bay, Newfoundland, we monitored patterns of settlement and distribution of 2 species of gadids, Atlantic cod Gadus morhua and Greenland cod G. ogac, following a large-scale alteration of nearshore eelgrass Zostera marina habitat. Comparisons between control and experimental sites, based...
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ftmemorialuniv:oai:research.library.mun.ca:534 2023-10-01T03:54:33+02:00 Settlement and distribution of Age-0 juvenile cod, Gadus morhua and G. ogac, following a large-scale habitat manipulation Laurel, Benjamin Jeffrey Gregory, R.S. Brown, J.A. 2003-11-07 application/pdf https://research.library.mun.ca/534/ https://research.library.mun.ca/534/1/settlement_distribution.pdf https://research.library.mun.ca/534/3/settlement_distribution.pdf http://www.int-res.com/abstracts/meps/v262/p241-252/ en eng Inter-Research https://research.library.mun.ca/534/1/settlement_distribution.pdf https://research.library.mun.ca/534/3/settlement_distribution.pdf Laurel, Benjamin Jeffrey <https://research.library.mun.ca/view/creator_az/Laurel=3ABenjamin_Jeffrey=3A=3A.html> and Gregory, R.S. <https://research.library.mun.ca/view/creator_az/Gregory=3AR=2ES=2E=3A=3A.html> and Brown, J.A. <https://research.library.mun.ca/view/creator_az/Brown=3AJ=2EA=2E=3A=3A.html> (2003) Settlement and distribution of Age-0 juvenile cod, Gadus morhua and G. ogac, following a large-scale habitat manipulation. Marine Ecology Progress Series, 262. pp. 241-252. ISSN 1616-1599 cc_by_nc QH301 Biology Article PeerReviewed 2003 ftmemorialuniv 2023-09-03T06:43:56Z In Bonavista Bay, Newfoundland, we monitored patterns of settlement and distribution of 2 species of gadids, Atlantic cod Gadus morhua and Greenland cod G. ogac, following a large-scale alteration of nearshore eelgrass Zostera marina habitat. Comparisons between control and experimental sites, based on bi-weekly sampling from 1995 to 2001, indicated a significant increase in cod abundance at sites enhanced with simulated eelgrass and a corresponding decrease in cod numbers at sites where eelgrass had been removed. These data supported predictions, demonstrating that: (1) there was a sufficient supply of juvenile cod within the areas that have historically been unoccupied (i.e. sand) and (2) both species preferred to settle in complex habitats. However, G. ogac responded significantly to the removal of eelgrass in more comparisons than G. morhua (70 and 37% respectively), suggesting that G. ogac has a higher affinity for complex vegetative habitats than G. morhua at the scale of manipulation (ca. 800 m2). Furthermore, despite an overall preference for eelgrass habitat, high within-site catch variation of post-settled juvenile cod indicated that both species were not restricted to a seine site. Such variation was occurring well after the settlement period, suggesting that juvenile cod were moving and occasionally aggregating (i.e. shoaling) throughout the study period. Our results support previously described associations between juvenile cod and eelgrass, but contradict other published accounts of high site-attachment and restricted movement in G. morhua following settlement. Article in Journal/Newspaper atlantic cod Bonavista Bay Gadus morhua Greenland Greenland cod Newfoundland Memorial University of Newfoundland: Research Repository Greenland |
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Memorial University of Newfoundland: Research Repository |
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ftmemorialuniv |
language |
English |
topic |
QH301 Biology |
spellingShingle |
QH301 Biology Laurel, Benjamin Jeffrey Gregory, R.S. Brown, J.A. Settlement and distribution of Age-0 juvenile cod, Gadus morhua and G. ogac, following a large-scale habitat manipulation |
topic_facet |
QH301 Biology |
description |
In Bonavista Bay, Newfoundland, we monitored patterns of settlement and distribution of 2 species of gadids, Atlantic cod Gadus morhua and Greenland cod G. ogac, following a large-scale alteration of nearshore eelgrass Zostera marina habitat. Comparisons between control and experimental sites, based on bi-weekly sampling from 1995 to 2001, indicated a significant increase in cod abundance at sites enhanced with simulated eelgrass and a corresponding decrease in cod numbers at sites where eelgrass had been removed. These data supported predictions, demonstrating that: (1) there was a sufficient supply of juvenile cod within the areas that have historically been unoccupied (i.e. sand) and (2) both species preferred to settle in complex habitats. However, G. ogac responded significantly to the removal of eelgrass in more comparisons than G. morhua (70 and 37% respectively), suggesting that G. ogac has a higher affinity for complex vegetative habitats than G. morhua at the scale of manipulation (ca. 800 m2). Furthermore, despite an overall preference for eelgrass habitat, high within-site catch variation of post-settled juvenile cod indicated that both species were not restricted to a seine site. Such variation was occurring well after the settlement period, suggesting that juvenile cod were moving and occasionally aggregating (i.e. shoaling) throughout the study period. Our results support previously described associations between juvenile cod and eelgrass, but contradict other published accounts of high site-attachment and restricted movement in G. morhua following settlement. |
format |
Article in Journal/Newspaper |
author |
Laurel, Benjamin Jeffrey Gregory, R.S. Brown, J.A. |
author_facet |
Laurel, Benjamin Jeffrey Gregory, R.S. Brown, J.A. |
author_sort |
Laurel, Benjamin Jeffrey |
title |
Settlement and distribution of Age-0 juvenile cod, Gadus morhua and G. ogac, following a large-scale habitat manipulation |
title_short |
Settlement and distribution of Age-0 juvenile cod, Gadus morhua and G. ogac, following a large-scale habitat manipulation |
title_full |
Settlement and distribution of Age-0 juvenile cod, Gadus morhua and G. ogac, following a large-scale habitat manipulation |
title_fullStr |
Settlement and distribution of Age-0 juvenile cod, Gadus morhua and G. ogac, following a large-scale habitat manipulation |
title_full_unstemmed |
Settlement and distribution of Age-0 juvenile cod, Gadus morhua and G. ogac, following a large-scale habitat manipulation |
title_sort |
settlement and distribution of age-0 juvenile cod, gadus morhua and g. ogac, following a large-scale habitat manipulation |
publisher |
Inter-Research |
publishDate |
2003 |
url |
https://research.library.mun.ca/534/ https://research.library.mun.ca/534/1/settlement_distribution.pdf https://research.library.mun.ca/534/3/settlement_distribution.pdf http://www.int-res.com/abstracts/meps/v262/p241-252/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
atlantic cod Bonavista Bay Gadus morhua Greenland Greenland cod Newfoundland |
genre_facet |
atlantic cod Bonavista Bay Gadus morhua Greenland Greenland cod Newfoundland |
op_relation |
https://research.library.mun.ca/534/1/settlement_distribution.pdf https://research.library.mun.ca/534/3/settlement_distribution.pdf Laurel, Benjamin Jeffrey <https://research.library.mun.ca/view/creator_az/Laurel=3ABenjamin_Jeffrey=3A=3A.html> and Gregory, R.S. <https://research.library.mun.ca/view/creator_az/Gregory=3AR=2ES=2E=3A=3A.html> and Brown, J.A. <https://research.library.mun.ca/view/creator_az/Brown=3AJ=2EA=2E=3A=3A.html> (2003) Settlement and distribution of Age-0 juvenile cod, Gadus morhua and G. ogac, following a large-scale habitat manipulation. Marine Ecology Progress Series, 262. pp. 241-252. ISSN 1616-1599 |
op_rights |
cc_by_nc |
_version_ |
1778522316172427264 |