Compensatory Growth of the Sandbar Shark in the Western North Atlantic Including the Gulf of Mexico
The number of Sandbar Sharks Carcharhinus plumbeus in the western North Atlantic Ocean has experienced a drastic decline since the early 1980s, reaching a minimum during the early 1990s. Catch rates in the early 1990s were a mere 25% of those during the 1980s. According to several fishery-independen...
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ftwilliammarycol:oai:scholarworks.wm.edu:vimsarticles-1071 2024-06-23T07:54:27+00:00 Compensatory Growth of the Sandbar Shark in the Western North Atlantic Including the Gulf of Mexico Romine, J. G. Musick, John A. Johnson, R. A. 2013-01-01T08:00:00Z application/pdf https://scholarworks.wm.edu/vimsarticles/72 doi: 10.1080/19425120.2013.793631 https://scholarworks.wm.edu/context/vimsarticles/article/1071/viewcontent/Compensatory_Growth_of_the_Sandbar_Shark_in_the_Western_North_Atlantic_Including_the_Gulf_of_Mexico.pdf unknown W&M ScholarWorks https://scholarworks.wm.edu/vimsarticles/72 doi: 10.1080/19425120.2013.793631 https://scholarworks.wm.edu/context/vimsarticles/article/1071/viewcontent/Compensatory_Growth_of_the_Sandbar_Shark_in_the_Western_North_Atlantic_Including_the_Gulf_of_Mexico.pdf http://creativecommons.org/licenses/by/4.0/ VIMS Articles CARCHARHINUS-PLUMBEUS AGE-DETERMINATION CHONDRICHTHYAN FISHES BOMB RADIOCARBON UNITED-STATES LAMNA-NASUS VALIDATION PARAMETERS SELECTION CURVE Fisheries Science Peer-Reviewed Articles Marine Biology text 2013 ftwilliammarycol https://doi.org/10.1080/19425120.2013.793631 2024-06-05T03:29:28Z The number of Sandbar Sharks Carcharhinus plumbeus in the western North Atlantic Ocean has experienced a drastic decline since the early 1980s, reaching a minimum during the early 1990s. Catch rates in the early 1990s were a mere 25% of those during the 1980s. According to several fishery-independent surveys, the low point in Sandbar Shark abundance followed a period of high exploitation. Growth models fit to age-length data collected from 1980 to 1983 and from 2001 to 2004 were compared to investigate potential changes in parameter estimates that might reveal compensatory responses in the Sandbar Shark population. Statistical differences were found between the model parameters for the two time periods, but the differences in growth rates were minimal. The parameters from the three-parameter von Bertalanffy growth model for female sharks during the 1980-1983 and 2000-2004 time periods were as follows: L = 188.4 and 178.3cm FL; k = 0.084 and 0.106; and t(0) = -4.097 and -3.41. For males the growth parameters were as follows: L = 164.63 and 173.66cm; k = 0.11 and 0.11; and t(0) = -3.62 and -3.33. The estimated age at 50% maturity for female Sandbar Sharks changed from 15years to 12.49years between the two time periods. Text Lamna nasus North Atlantic W&M ScholarWorks Low Point ENVELOPE(-37.183,-37.183,-54.050,-54.050) Marine and Coastal Fisheries 5 1 189 199 |
institution |
Open Polar |
collection |
W&M ScholarWorks |
op_collection_id |
ftwilliammarycol |
language |
unknown |
topic |
CARCHARHINUS-PLUMBEUS AGE-DETERMINATION CHONDRICHTHYAN FISHES BOMB RADIOCARBON UNITED-STATES LAMNA-NASUS VALIDATION PARAMETERS SELECTION CURVE Fisheries Science Peer-Reviewed Articles Marine Biology |
spellingShingle |
CARCHARHINUS-PLUMBEUS AGE-DETERMINATION CHONDRICHTHYAN FISHES BOMB RADIOCARBON UNITED-STATES LAMNA-NASUS VALIDATION PARAMETERS SELECTION CURVE Fisheries Science Peer-Reviewed Articles Marine Biology Romine, J. G. Musick, John A. Johnson, R. A. Compensatory Growth of the Sandbar Shark in the Western North Atlantic Including the Gulf of Mexico |
topic_facet |
CARCHARHINUS-PLUMBEUS AGE-DETERMINATION CHONDRICHTHYAN FISHES BOMB RADIOCARBON UNITED-STATES LAMNA-NASUS VALIDATION PARAMETERS SELECTION CURVE Fisheries Science Peer-Reviewed Articles Marine Biology |
description |
The number of Sandbar Sharks Carcharhinus plumbeus in the western North Atlantic Ocean has experienced a drastic decline since the early 1980s, reaching a minimum during the early 1990s. Catch rates in the early 1990s were a mere 25% of those during the 1980s. According to several fishery-independent surveys, the low point in Sandbar Shark abundance followed a period of high exploitation. Growth models fit to age-length data collected from 1980 to 1983 and from 2001 to 2004 were compared to investigate potential changes in parameter estimates that might reveal compensatory responses in the Sandbar Shark population. Statistical differences were found between the model parameters for the two time periods, but the differences in growth rates were minimal. The parameters from the three-parameter von Bertalanffy growth model for female sharks during the 1980-1983 and 2000-2004 time periods were as follows: L = 188.4 and 178.3cm FL; k = 0.084 and 0.106; and t(0) = -4.097 and -3.41. For males the growth parameters were as follows: L = 164.63 and 173.66cm; k = 0.11 and 0.11; and t(0) = -3.62 and -3.33. The estimated age at 50% maturity for female Sandbar Sharks changed from 15years to 12.49years between the two time periods. |
format |
Text |
author |
Romine, J. G. Musick, John A. Johnson, R. A. |
author_facet |
Romine, J. G. Musick, John A. Johnson, R. A. |
author_sort |
Romine, J. G. |
title |
Compensatory Growth of the Sandbar Shark in the Western North Atlantic Including the Gulf of Mexico |
title_short |
Compensatory Growth of the Sandbar Shark in the Western North Atlantic Including the Gulf of Mexico |
title_full |
Compensatory Growth of the Sandbar Shark in the Western North Atlantic Including the Gulf of Mexico |
title_fullStr |
Compensatory Growth of the Sandbar Shark in the Western North Atlantic Including the Gulf of Mexico |
title_full_unstemmed |
Compensatory Growth of the Sandbar Shark in the Western North Atlantic Including the Gulf of Mexico |
title_sort |
compensatory growth of the sandbar shark in the western north atlantic including the gulf of mexico |
publisher |
W&M ScholarWorks |
publishDate |
2013 |
url |
https://scholarworks.wm.edu/vimsarticles/72 https://scholarworks.wm.edu/context/vimsarticles/article/1071/viewcontent/Compensatory_Growth_of_the_Sandbar_Shark_in_the_Western_North_Atlantic_Including_the_Gulf_of_Mexico.pdf |
long_lat |
ENVELOPE(-37.183,-37.183,-54.050,-54.050) |
geographic |
Low Point |
geographic_facet |
Low Point |
genre |
Lamna nasus North Atlantic |
genre_facet |
Lamna nasus North Atlantic |
op_source |
VIMS Articles |
op_relation |
https://scholarworks.wm.edu/vimsarticles/72 doi: 10.1080/19425120.2013.793631 https://scholarworks.wm.edu/context/vimsarticles/article/1071/viewcontent/Compensatory_Growth_of_the_Sandbar_Shark_in_the_Western_North_Atlantic_Including_the_Gulf_of_Mexico.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1080/19425120.2013.793631 |
container_title |
Marine and Coastal Fisheries |
container_volume |
5 |
container_issue |
1 |
container_start_page |
189 |
op_container_end_page |
199 |
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1802646600634335232 |