Preliminary recovery of coastal sharks in the south‐east United States
Abstract Relative abundance of many shark species in the Atlantic is assessed by compiling data from several independently conducted, but somewhat spatially limited surveys. Although these localized surveys annually sample the same populations, resulting trends in yearly indices often conflict with...
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Online Access: | http://dx.doi.org/10.1111/faf.12210 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Ffaf.12210 https://onlinelibrary.wiley.com/doi/pdf/10.1111/faf.12210 |
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crwiley:10.1111/faf.12210 2024-09-15T18:23:46+00:00 Preliminary recovery of coastal sharks in the south‐east United States Peterson, Cassidy D Belcher, Carolyn N Bethea, Dana M Driggers, William B Frazier, Bryan S Latour, Robert J NMFS Highly Migratory Species Office NOAA Fisheries SEAMAP-SA Atlantic States Marine Fisheries Commission South Carolina Saltwater Recreational Fishing License Funds Federal Assistance for Interjurisdictional Fisheries Program 2017 http://dx.doi.org/10.1111/faf.12210 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Ffaf.12210 https://onlinelibrary.wiley.com/doi/pdf/10.1111/faf.12210 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fish and Fisheries volume 18, issue 5, page 845-859 ISSN 1467-2960 1467-2979 journal-article 2017 crwiley https://doi.org/10.1111/faf.12210 2024-08-13T04:14:46Z Abstract Relative abundance of many shark species in the Atlantic is assessed by compiling data from several independently conducted, but somewhat spatially limited surveys. Although these localized surveys annually sample the same populations, resulting trends in yearly indices often conflict with one another, thereby hindering interpretation of abundance patterns at broad spatial scales. We used delta‐lognormal generalized linear models ( GLM s) to generate indices of abundance for seven Atlantic coastal shark species from six fishery‐independent surveys along the US east coast and Gulf of Mexico from 1975 to 2014. These indices were further analysed using dynamic factor analysis ( DFA ) to produce simplified, broad‐scale common trends in relative abundance over the entire sampled distribution. Effects of drivers including the North Atlantic Oscillation index, the Atlantic Multidecadal Oscillation index, annually averaged sea surface temperature and species landings were evaluated within the DFA model. The two decadal oscillations and species landings were shown to affect shark distribution along south‐east US coast. Estimated common trends of relative abundance for all large coastal shark species showed similar decreasing patterns into the early 1990s, periods of sustained low index values thereafter and recent indications of recovery. Small coastal shark species exhibited more regional variability in their estimated common trends, such that two common trends were required to adequately describe patterns in relative abundance throughout the Gulf of Mexico and Atlantic. Overall, all species’ (except the Gulf of Mexico blacknose shark) time series concluded with an increasing trend, suggestive of initial recovery from past exploitation. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Wiley Online Library Fish and Fisheries 18 5 845 859 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Relative abundance of many shark species in the Atlantic is assessed by compiling data from several independently conducted, but somewhat spatially limited surveys. Although these localized surveys annually sample the same populations, resulting trends in yearly indices often conflict with one another, thereby hindering interpretation of abundance patterns at broad spatial scales. We used delta‐lognormal generalized linear models ( GLM s) to generate indices of abundance for seven Atlantic coastal shark species from six fishery‐independent surveys along the US east coast and Gulf of Mexico from 1975 to 2014. These indices were further analysed using dynamic factor analysis ( DFA ) to produce simplified, broad‐scale common trends in relative abundance over the entire sampled distribution. Effects of drivers including the North Atlantic Oscillation index, the Atlantic Multidecadal Oscillation index, annually averaged sea surface temperature and species landings were evaluated within the DFA model. The two decadal oscillations and species landings were shown to affect shark distribution along south‐east US coast. Estimated common trends of relative abundance for all large coastal shark species showed similar decreasing patterns into the early 1990s, periods of sustained low index values thereafter and recent indications of recovery. Small coastal shark species exhibited more regional variability in their estimated common trends, such that two common trends were required to adequately describe patterns in relative abundance throughout the Gulf of Mexico and Atlantic. Overall, all species’ (except the Gulf of Mexico blacknose shark) time series concluded with an increasing trend, suggestive of initial recovery from past exploitation. |
author2 |
NMFS Highly Migratory Species Office NOAA Fisheries SEAMAP-SA Atlantic States Marine Fisheries Commission South Carolina Saltwater Recreational Fishing License Funds Federal Assistance for Interjurisdictional Fisheries Program |
format |
Article in Journal/Newspaper |
author |
Peterson, Cassidy D Belcher, Carolyn N Bethea, Dana M Driggers, William B Frazier, Bryan S Latour, Robert J |
spellingShingle |
Peterson, Cassidy D Belcher, Carolyn N Bethea, Dana M Driggers, William B Frazier, Bryan S Latour, Robert J Preliminary recovery of coastal sharks in the south‐east United States |
author_facet |
Peterson, Cassidy D Belcher, Carolyn N Bethea, Dana M Driggers, William B Frazier, Bryan S Latour, Robert J |
author_sort |
Peterson, Cassidy D |
title |
Preliminary recovery of coastal sharks in the south‐east United States |
title_short |
Preliminary recovery of coastal sharks in the south‐east United States |
title_full |
Preliminary recovery of coastal sharks in the south‐east United States |
title_fullStr |
Preliminary recovery of coastal sharks in the south‐east United States |
title_full_unstemmed |
Preliminary recovery of coastal sharks in the south‐east United States |
title_sort |
preliminary recovery of coastal sharks in the south‐east united states |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1111/faf.12210 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Ffaf.12210 https://onlinelibrary.wiley.com/doi/pdf/10.1111/faf.12210 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Fish and Fisheries volume 18, issue 5, page 845-859 ISSN 1467-2960 1467-2979 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/faf.12210 |
container_title |
Fish and Fisheries |
container_volume |
18 |
container_issue |
5 |
container_start_page |
845 |
op_container_end_page |
859 |
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1810464025071321088 |