Spatial variability in distribution and growth of juvenile and adult sea scallops, Placopecten magellanicus (G.), on eastern Georges Bank (Northwest Atlantic)
International audience Spatial distribution of juvenile and adult sea scallops Placopecten magellanicus (Gmelin) was studied from video-monitored sled-dredge samples in commercial scallop beds of eastern Georges Bank (Northwest Atlantic). Maximum densities of 1 and 2 yr old individuals, as well as o...
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ftunivbrest:oai:HAL:hal-00524781v1 2023-05-15T17:45:32+02:00 Spatial variability in distribution and growth of juvenile and adult sea scallops, Placopecten magellanicus (G.), on eastern Georges Bank (Northwest Atlantic) Thouzeau, Gérard Robert, G. Smith, S.J. Department of Fisheries and Oceans - Halifax Fisheries Research laboratory 1991 https://hal.univ-brest.fr/hal-00524781 https://hal.univ-brest.fr/hal-00524781/document https://hal.univ-brest.fr/hal-00524781/file/m074p205-1.pdf en eng HAL CCSD Inter Research hal-00524781 https://hal.univ-brest.fr/hal-00524781 https://hal.univ-brest.fr/hal-00524781/document https://hal.univ-brest.fr/hal-00524781/file/m074p205-1.pdf http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.univ-brest.fr/hal-00524781 Marine Ecology Progress Series, Inter Research, 1991, 74 (2-3), pp.205-218 [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 1991 ftunivbrest 2022-05-12T19:50:15Z International audience Spatial distribution of juvenile and adult sea scallops Placopecten magellanicus (Gmelin) was studied from video-monitored sled-dredge samples in commercial scallop beds of eastern Georges Bank (Northwest Atlantic). Maximum densities of 1 and 2 yr old individuals, as well as of adults, were recorded in the northern area of the study. Abundance of scallops was significantly higher on gravel than on the other sediment types. Scallops appeared to exhibit a Poisson distribution within sediment type. Distribution of juveniles only partly matched that of adults; age 1 individuals were less dispersed than 2 yr olds and adults, and were mainly located on a gravel-pebble deposit in the northern half of the Bank. It is inferred that movements associated with tidal currents occur as the individuals grow older. The relative abundances of pre-recruits and recruits emphasize the impact of fishing activity on size structure. Growth parameters of the von Bertalanffy function would indicate that Lee's phenomenon acts on the population. Age 2 juveniles showed a strong depth-related decrease in shell growth, linked to temperature and probably to food availability. The sampling technique employed has the potential for establishing pre-recruitment indices for use in management of this fishery. Article in Journal/Newspaper Northwest Atlantic Université de Bretagne Occidentale: HAL |
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Université de Bretagne Occidentale: HAL |
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ftunivbrest |
language |
English |
topic |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology |
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[SDE.BE]Environmental Sciences/Biodiversity and Ecology Thouzeau, Gérard Robert, G. Smith, S.J. Spatial variability in distribution and growth of juvenile and adult sea scallops, Placopecten magellanicus (G.), on eastern Georges Bank (Northwest Atlantic) |
topic_facet |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience Spatial distribution of juvenile and adult sea scallops Placopecten magellanicus (Gmelin) was studied from video-monitored sled-dredge samples in commercial scallop beds of eastern Georges Bank (Northwest Atlantic). Maximum densities of 1 and 2 yr old individuals, as well as of adults, were recorded in the northern area of the study. Abundance of scallops was significantly higher on gravel than on the other sediment types. Scallops appeared to exhibit a Poisson distribution within sediment type. Distribution of juveniles only partly matched that of adults; age 1 individuals were less dispersed than 2 yr olds and adults, and were mainly located on a gravel-pebble deposit in the northern half of the Bank. It is inferred that movements associated with tidal currents occur as the individuals grow older. The relative abundances of pre-recruits and recruits emphasize the impact of fishing activity on size structure. Growth parameters of the von Bertalanffy function would indicate that Lee's phenomenon acts on the population. Age 2 juveniles showed a strong depth-related decrease in shell growth, linked to temperature and probably to food availability. The sampling technique employed has the potential for establishing pre-recruitment indices for use in management of this fishery. |
author2 |
Department of Fisheries and Oceans - Halifax Fisheries Research laboratory |
format |
Article in Journal/Newspaper |
author |
Thouzeau, Gérard Robert, G. Smith, S.J. |
author_facet |
Thouzeau, Gérard Robert, G. Smith, S.J. |
author_sort |
Thouzeau, Gérard |
title |
Spatial variability in distribution and growth of juvenile and adult sea scallops, Placopecten magellanicus (G.), on eastern Georges Bank (Northwest Atlantic) |
title_short |
Spatial variability in distribution and growth of juvenile and adult sea scallops, Placopecten magellanicus (G.), on eastern Georges Bank (Northwest Atlantic) |
title_full |
Spatial variability in distribution and growth of juvenile and adult sea scallops, Placopecten magellanicus (G.), on eastern Georges Bank (Northwest Atlantic) |
title_fullStr |
Spatial variability in distribution and growth of juvenile and adult sea scallops, Placopecten magellanicus (G.), on eastern Georges Bank (Northwest Atlantic) |
title_full_unstemmed |
Spatial variability in distribution and growth of juvenile and adult sea scallops, Placopecten magellanicus (G.), on eastern Georges Bank (Northwest Atlantic) |
title_sort |
spatial variability in distribution and growth of juvenile and adult sea scallops, placopecten magellanicus (g.), on eastern georges bank (northwest atlantic) |
publisher |
HAL CCSD |
publishDate |
1991 |
url |
https://hal.univ-brest.fr/hal-00524781 https://hal.univ-brest.fr/hal-00524781/document https://hal.univ-brest.fr/hal-00524781/file/m074p205-1.pdf |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.univ-brest.fr/hal-00524781 Marine Ecology Progress Series, Inter Research, 1991, 74 (2-3), pp.205-218 |
op_relation |
hal-00524781 https://hal.univ-brest.fr/hal-00524781 https://hal.univ-brest.fr/hal-00524781/document https://hal.univ-brest.fr/hal-00524781/file/m074p205-1.pdf |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
_version_ |
1766148610695626752 |