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Improving Catch Utilization in the U.S. West Coast Groundfish Bottom Trawl Fishery: an Evaluation of T90‐Mesh and Diamond‐Mesh Cod Ends
  • Published Date:
    2017
  • Source:
    Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 9(1), 149–160
Filetype[PDF-1.20 MB]


Details:
  • Personal Author:
  • Description:
    The limited‐entry bottom trawl fishery for groundfish along the U.S. West Coast operates under a catch share program, which is implemented with the intention of improving the economic efficiency of the fishery, maximizing fishing opportunities, and minimizing bycatch. However, stocks with low harvest guidelines have limited the ability of fishermen to maximize their catch of more abundant stocks. Size‐selection characteristics of 114‐mm and 140‐mm T90‐mesh cod ends and the traditional 114‐mm diamond‐mesh cod end were examined by using the covered cod end method. Selection curves and mean L50 values (length at which fish had a 50% probability of being retained) were estimated for two flatfish species (Rex Sole Glyptocephalus zachirus and Dover Sole Microstomus pacificus) and two roundfish species (Shortspine Thornyhead Sebastolobus alascanus and Sablefish Anoplopoma fimbria). Mean L50 values were smaller for flatfishes but larger for roundfishes in the 114‐mm T90 cod end compared to the diamond‐mesh cod end. For Rex Sole, Dover Sole, and Shortspine Thornyheads, selectivities of the 140‐mm T90 cod end were significantly different from those of the other cod ends; the 140‐mm T90 cod end was most effective at reducing the catch of smaller‐sized fishes but with a considerable loss of larger‐sized marketable fishes. Findings suggest that T90 cod ends have potential to improve catch utilization in this multispecies fishery.
  • Keywords:
  • DOI:
    https://doi.org/10.1080/19425120.2016.1274697
  • Document Type:
    Journal Article
  • Place as Subject:
    Pacific Coast (U.S.)
  • Collection(s):
    National Marine Fisheries Service (NMFS)
  • Main Document Checksum:
  • Supporting Files:
    No Additional Files
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      Christiansen, Fredrik; McHugh, Katherine A.; Bejder, Lars;
      Published Date:
      2016
      Source:
      Royal Society Open Science, 3(12), 1-12
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    2. Multiyear Tracking of Nassau Grouper Spawning Migrations
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      Dahlgren, C. P.; Buch, K.; Rechisky, E.;
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      2016
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      Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 8(1), 522–535
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      An understanding of temporal patterns of migration and spatial connectivity between home ranges and spawning sites is necessary for effective management of species that form transient spawning aggregations. The Nassau Grouper Epinephelus striatus is ...
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      Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 10(3), 347–356
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    4. Comparative Abundance, Species Composition, and Demographics of Continental Shelf Fish Assemblages throughout the Gulf of Mexico
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      Murawski, Steven A.; Peebles, Ernst B.; Gracia, Adolfo;
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      2018
      Source:
      Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 10(3), 325–346
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      We analyzed the results of the first comprehensive, systematic, fishery‐independent survey of Gulf of Mexico (GoM) continental shelves using data collected from demersal longline sampling off the United States, Mexico, and Cuba. In total, 166 speci...
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    5. Atlantic Sturgeon Use of the Penobscot River and Marine Movements within and beyond the Gulf of Maine
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      2017
      Source:
      Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 9(1), 216–230,
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      Atlantic Sturgeon Acipenser oxyrinchus oxyrinchus were recently listed as threatened in the Gulf of Maine and endangered in the rest of their U.S. range. Continued research priorities include long-term population monitoring, identifying the species...
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    6. Spatially Clustered Movement Patterns and Segregation of Subadult Chinook Salmon within the Salish Sea
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      2017
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      Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 9(1), 1–12
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      Runde, Brendan J.; Buckel, Jeffrey A.;
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      2018
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      Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 10(2), 100–117
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      Discard survival of deepwater (>60 m) groupers (Serranidae; Epinephelinae) is often assumed to be 0% given the severity of barotrauma and the inability of fish to submerge. We used acoustic telemetry to study the activity of 19 deepwater grouper afte...
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    8. Low Apparent Survival and Heterogeneous Movement Patterns of Invasive Blue Catfish in a Coastal River
      Personal Author:
      Tuckey, Troy D.; Fabrizio, Mary C.; Norris, Alicia J.;
      Published Date:
      2017
      Source:
      Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 9(1), 564–572
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      Blue Catfish Ictalurus furcatus were purposefully introduced into freshwater tributaries to Chesapeake Bay in the past, and populations have subsequently spread to new areas, negatively impacting native communities and causing concern for resource ma...
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    9. Food limitation of sea lion pups and the decline of forage off central and southern California
      Personal Author:
      McClatchie, Sam; Field, John; Thompson, Andrew R.;
      Published Date:
      2016
      Source:
      Royal Society Open Science, 3(3), 1-9
      Description:
      California sea lions increased from approximately 50 000 to 340 000 animals in the last 40 years, and their pups are starving and stranding on beaches in southern California, raising questions about the adequacy of their food supply. We investiga...
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    10. Testing of Two Selective Flatfish Sorting‐Grid Bycatch Reduction Devices in the U.S. West Coast Groundfish Bottom Trawl Fishery
      Personal Author:
      Lomeli, Mark J. M.; Wakefield, W. Waldo; Herrmann, Bent;
      Published Date:
      2017
      Source:
      Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 9(1), 597–611
      Description:
      In the U.S. West Coast limited-entry (LE) groundfish bottom trawl fishery, catches of stocks with restrictive harvest limits (e.g., Darkblotched Rockfish Sebastes crameri, Sablefish Anoplopoma fimbria, and Pacific Halibut Hippoglossus stenolepis) con...
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      Personal Author:
      Trudelle, Laurène; Cerchio, Salvatore; Zerbini, Alexandre N.;
      Published Date:
      2016
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      Royal Society Open Science, 3(12), 1-22
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      Assessing the movement patterns and key habitat features of breeding humpback whales is a prerequisite for the conservation management of this philopatric species. To investigate the interactions between humpback whale movements and environmental con...
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      Tellus B: Chemical and Physical Meteorology, 68(1), 1-10
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      GasEx-98 was the first open-ocean process study where gas transfer velocity measurements were made with several robust techniques, including airside eddy covariance of CO2 and deliberate injection of 3He and SF6. While the CO2 eddy covariance results...
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      Harford, W. J.; Smith, S. G.; Ault, J. S.; Babcock, E. A.;
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      2016
      Source:
      Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 8(1), 147–159
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      In the Florida Keys coral reef ecosystem, delineation of reef fish distributions in relationship to habitat patterns is important for improving the design characteristics of fishery-independent surveys. Efficient survey design depends on analysis of ...
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      Lewis, Leah A.; Calambokidis, John; Stimpert, Alison K.;
      Published Date:
      2018
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      Royal Society Open Science, 5(8), 1-20
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      Royal Society Open Science, 3(3), 1-16
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      2016
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      Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 8(1), 244–262
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      2016
      Source:
      Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 8(1), 1–15
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      Royal Society Open Science, 5(8), 1-12
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      Despite evidence of maternal age effects in a number of teleost species, there have been challenges to the assertion that maternal age intrinsically influences offspring quality. From an evolutionary perspective, maternal age effects result in young ...
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