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
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 sur...
Published in: | Marine and Coastal Fisheries |
---|---|
Main Authors: | , , |
Format: | Text |
Language: | English |
Published: |
American Fisheries Society
2016
|
Subjects: | |
Online Access: | https://doi.org/10.1080/19425120.2015.1135219 |
id |
ftbioone:10.1080/19425120.2015.1135219 |
---|---|
record_format |
openpolar |
spelling |
ftbioone: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 Skyler R. Sagarese Michael G. Frisk Robert M. Cerrato Skyler R. Sagarese Michael G. Frisk Robert M. Cerrato world 2016-06-22 text/HTML https://doi.org/10.1080/19425120.2015.1135219 en eng American Fisheries Society doi:10.1080/19425120.2015.1135219 All rights reserved. https://doi.org/10.1080/19425120.2015.1135219 Text 2016 ftbioone https://doi.org/10.1080/19425120.2015.1135219 2024-05-07T00:51:43Z 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. Text spiny dogfish Squalus acanthias BioOne Online Journals 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 |
BioOne Online Journals |
op_collection_id |
ftbioone |
language |
English |
description |
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. |
author2 |
Skyler R. Sagarese Michael G. Frisk Robert M. Cerrato |
format |
Text |
author |
Skyler R. Sagarese Michael G. Frisk Robert M. Cerrato |
spellingShingle |
Skyler R. Sagarese Michael G. Frisk Robert M. Cerrato 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 |
Skyler R. Sagarese Michael G. Frisk Robert M. Cerrato |
author_sort |
Skyler R. Sagarese |
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 |
American Fisheries Society |
publishDate |
2016 |
url |
https://doi.org/10.1080/19425120.2015.1135219 |
op_coverage |
world |
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 |
https://doi.org/10.1080/19425120.2015.1135219 |
op_relation |
doi:10.1080/19425120.2015.1135219 |
op_rights |
All rights reserved. |
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_ |
1800740398805549056 |