Diel Variations in Survey Catch Rates and Survey Catchability of Spiny Dogfish and their Pelagic Prey in the Northeast U.S. Continental Shelf Large Marine Ecosystem
Abstract This study examines the potential uncertainty in survey biomass estimates of Spiny Dogfish Squalus acanthias in the Northeast U.S. Continental Shelf Large Marine Ecosystem (NES LME). Diel catch‐per‐unit‐effort (CPUE) estimates are examined from the Northeast Fisheries Science Center bottom...
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Online Access: | http://dx.doi.org/10.1080/19425120.2015.1135219 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1080/19425120.2015.1135219 |
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crwiley:10.1080/19425120.2015.1135219 2024-06-02T08:16:03+00:00 Diel Variations in Survey Catch Rates and Survey Catchability of Spiny Dogfish and their Pelagic Prey in the Northeast U.S. Continental Shelf Large Marine Ecosystem Sagarese, Skyler R. Frisk, Michael G. Cerrato, Robert M. Sosebee, Kathy A. Musick, John A. Rago, Paul J. 2016 http://dx.doi.org/10.1080/19425120.2015.1135219 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1080/19425120.2015.1135219 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Marine and Coastal Fisheries volume 8, issue 1, page 244-262 ISSN 1942-5120 1942-5120 journal-article 2016 crwiley https://doi.org/10.1080/19425120.2015.1135219 2024-05-03T11:42:19Z Abstract This study examines the potential uncertainty in survey biomass estimates of Spiny Dogfish Squalus acanthias in the Northeast U.S. Continental Shelf Large Marine Ecosystem (NES LME). Diel catch‐per‐unit‐effort (CPUE) estimates are examined from the Northeast Fisheries Science Center bottom trawl surveys conducted during autumn (1963–2009) and spring (1968–2009). Influential environmental variables on survey catchability are identified for Spiny Dogfish life history stages and five pelagic prey species: Butterfish Peprilus triacanthus , Atlantic Herring Clupea harengus , shortfin squid Illex spp., longfin squid Doryteuthis spp., and Atlantic Mackerel Scomber scombrus . Daytime survey catchability was significantly higher than nighttime catchability for most species during autumn and for mature male Spiny Dogfish, shortfin squid, and longfin squid during spring in the NES LME. For most stages and species examined, breakpoint analyses identified significant increases in CPUE in the morning, peak CPUE during the day, and significant declines in CPUE in the late afternoon. Seasonal probabilities of daytime catch were largely driven by solar zenith angle for most species, with stronger trends identified during autumn. Unadjusted CPUE estimates appear to overestimate absolute abundance, with adjustments resulting in reductions in absolute abundance ranging from 41% for Spiny Dogfish to 91% for shortfin and longfin squids. These findings have important implications for Spiny Dogfish regarding estimates of population consumption of key pelagic prey species and their ecological footprint within the NES LME. Received February 25, 2015; accepted December 16, 2015 Article in Journal/Newspaper spiny dogfish Squalus acanthias Wiley Online Library Nes ENVELOPE(7.634,7.634,62.795,62.795) Nes’ ENVELOPE(44.681,44.681,66.600,66.600) Marine and Coastal Fisheries 8 1 244 262 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract This study examines the potential uncertainty in survey biomass estimates of Spiny Dogfish Squalus acanthias in the Northeast U.S. Continental Shelf Large Marine Ecosystem (NES LME). Diel catch‐per‐unit‐effort (CPUE) estimates are examined from the Northeast Fisheries Science Center bottom trawl surveys conducted during autumn (1963–2009) and spring (1968–2009). Influential environmental variables on survey catchability are identified for Spiny Dogfish life history stages and five pelagic prey species: Butterfish Peprilus triacanthus , Atlantic Herring Clupea harengus , shortfin squid Illex spp., longfin squid Doryteuthis spp., and Atlantic Mackerel Scomber scombrus . Daytime survey catchability was significantly higher than nighttime catchability for most species during autumn and for mature male Spiny Dogfish, shortfin squid, and longfin squid during spring in the NES LME. For most stages and species examined, breakpoint analyses identified significant increases in CPUE in the morning, peak CPUE during the day, and significant declines in CPUE in the late afternoon. Seasonal probabilities of daytime catch were largely driven by solar zenith angle for most species, with stronger trends identified during autumn. Unadjusted CPUE estimates appear to overestimate absolute abundance, with adjustments resulting in reductions in absolute abundance ranging from 41% for Spiny Dogfish to 91% for shortfin and longfin squids. These findings have important implications for Spiny Dogfish regarding estimates of population consumption of key pelagic prey species and their ecological footprint within the NES LME. Received February 25, 2015; accepted December 16, 2015 |
format |
Article in Journal/Newspaper |
author |
Sagarese, Skyler R. Frisk, Michael G. Cerrato, Robert M. Sosebee, Kathy A. Musick, John A. Rago, Paul J. |
spellingShingle |
Sagarese, Skyler R. Frisk, Michael G. Cerrato, Robert M. Sosebee, Kathy A. Musick, John A. Rago, Paul J. Diel Variations in Survey Catch Rates and Survey Catchability of Spiny Dogfish and their Pelagic Prey in the Northeast U.S. Continental Shelf Large Marine Ecosystem |
author_facet |
Sagarese, Skyler R. Frisk, Michael G. Cerrato, Robert M. Sosebee, Kathy A. Musick, John A. Rago, Paul J. |
author_sort |
Sagarese, Skyler R. |
title |
Diel Variations in Survey Catch Rates and Survey Catchability of Spiny Dogfish and their Pelagic Prey in the Northeast U.S. Continental Shelf Large Marine Ecosystem |
title_short |
Diel Variations in Survey Catch Rates and Survey Catchability of Spiny Dogfish and their Pelagic Prey in the Northeast U.S. Continental Shelf Large Marine Ecosystem |
title_full |
Diel Variations in Survey Catch Rates and Survey Catchability of Spiny Dogfish and their Pelagic Prey in the Northeast U.S. Continental Shelf Large Marine Ecosystem |
title_fullStr |
Diel Variations in Survey Catch Rates and Survey Catchability of Spiny Dogfish and their Pelagic Prey in the Northeast U.S. Continental Shelf Large Marine Ecosystem |
title_full_unstemmed |
Diel Variations in Survey Catch Rates and Survey Catchability of Spiny Dogfish and their Pelagic Prey in the Northeast U.S. Continental Shelf Large Marine Ecosystem |
title_sort |
diel variations in survey catch rates and survey catchability of spiny dogfish and their pelagic prey in the northeast u.s. continental shelf large marine ecosystem |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1080/19425120.2015.1135219 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1080/19425120.2015.1135219 |
long_lat |
ENVELOPE(7.634,7.634,62.795,62.795) ENVELOPE(44.681,44.681,66.600,66.600) |
geographic |
Nes Nes’ |
geographic_facet |
Nes Nes’ |
genre |
spiny dogfish Squalus acanthias |
genre_facet |
spiny dogfish Squalus acanthias |
op_source |
Marine and Coastal Fisheries volume 8, issue 1, page 244-262 ISSN 1942-5120 1942-5120 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1080/19425120.2015.1135219 |
container_title |
Marine and Coastal Fisheries |
container_volume |
8 |
container_issue |
1 |
container_start_page |
244 |
op_container_end_page |
262 |
_version_ |
1800740398575910912 |