Science Keywords>AGRICULTURE
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Incidental Catch of Marine Birds in the North Pacific High Seas Driftnet Fisheries in 1990. Entry ID: usgs_npwrc_incidentalmarinecatc |
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Summary
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Abstract:
The incidental take of marine birds was estimated for the following North Pacific driftnet fisheries in 1990: Japanese squid, Japanese large-mesh, Korean squid, and Taiwanese squid and large-mesh combined. The take was estimated by assuming that the data represented a random sample from an unstratified population of all driftnet fisheries in the North Pacific. Estimates for 13 species or species groups are presented, along with some discussion of inadequacies of the design. About 416,000 marine birds were estimated to be taken incidentally during the 1990 season; 80 % of these were in the Japanese squid fishery. Sooty Shearwaters, Short-tailed Shearwaters, and Laysan Albatrosses were the most common species in the bycatch. Regression models were also developed to explore the relations between bycatch rate of three groups Black-footed Albatross, Laysan Albatross, and "dark" shearwatersand various explanatory variables, such as latitude, longitude, month, vessel, sea surface temperature, and net soak time (length of time nets were in the water). This was done for only the Japanese squid fishery, for which the most complete information was available. For modeling purposes, fishing operations for each vessel were grouped into 5-degree blocks of latitude and longitude. Results of model building indicated that vessel had a significant influence on bycatch rates of all three groups. This finding emphasizes the importance of the sample of vessels being representative of the entire fleet. In addition, bycatch rates of all three groups varied spatially and temporally. Bycatch rates for Laysan Albatrosses tended to decline during the fishing season, whereas those for Black-footed Albatrosses and dark shearwaters tended to increase as the season progressed. Bycatch rates were positively related to net soak time for Laysan Albatrosses and dark shearwaters. Bycatch rates of dark shearwaters were lower for higher sea surface temperatures. |
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Description: Incidental Catch of Marine Birds in the North Pacific High Seas Driftnet Fisheries in 1990 data |
Geographic Coverage
| N: 50.0 | S: 20.0 | E: 140.0 | W: -140.0 |
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Data Set Citation
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Dataset Originator/Creator:
Douglas H. Johnson, Terry L. Shaffer, and Patrick J. Gould
Dataset Title: Incidental Catch of Marine Birds in the North Pacific High Seas Driftnet Fisheries in 1990 Dataset Release Date: 1990 Dataset Release Place: Jamestown, North Dakota Dataset Publisher: USGS, Northern Prairie Wildlife Research Center Version: Version 11APR2001 Online Resource: http://www.npwrc.usgs.gov/resource/birds/icatch/index.htm |
Temporal Coverage
| Start Date: 1990-01-01 |
| Stop Date: 1990-01-01 |
Location Keywords
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OCEAN
> PACIFIC OCEAN
> NORTH PACIFIC OCEAN
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Science Keywords
| AGRICULTURE >AGRICULTURAL AQUATIC SCIENCES >FISHERIES [Definition] |
| OCEANS >AQUATIC SCIENCES >FISHERIES [Definition] |
| BIOLOGICAL CLASSIFICATION >ANIMALS/VERTEBRATES >BIRDS [Definition] |
| BIOLOGICAL CLASSIFICATION >ANIMALS/VERTEBRATES >FISH [Definition] |
ISO Topic Category
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FARMING
BIOTA ECONOMY |
Access Constraints
| None |
Use Constraints
| None |
Keywords
| incidental take |
| marine birds |
| Japanese squid |
| Japanese large-mesh |
| Korean squid |
| Taiwanese squid |
| Black-footed Albatross |
| Laysan Albatross |
| "dark" shearwaters |
Data Set Progress
| COMPLETE |
Data Center
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Northern Prairie Wildlife Research Center, Biological Resources Division, U.S. Geological Survey, U.S. Department of the Interior
[Information]
Data Center URL: http://www.npwrc.usgs.gov/
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Distribution
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Distribution_Media:
FTP
Distribution_Size: 26 K bytes Distribution_Format: zip Fees: none |
Personnel
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DOUGLAS
H.
JOHNSON Role: TECHNICAL CONTACT Phone: (701) 253-5539, (701) 253-5553 Email: Douglas_Johnson at usgs.gov Contact Address: U.S. Geological Survey Biological Resources Division Northern Prairie Wildlife Research Center 8711 37th Street SE City: Jamestown Province or State: North Dakota Postal Code: 58401-7317 Country: USA |
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TYLER
B.
STEVENS Role: DIF AUTHOR Phone: (301) 614-6898 Fax: 301-614-5268 Email: Tyler.B.Stevens at nasa.gov Contact Address: NASA Goddard Space Flight Center Global Change Master Directory City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA |
Publications/References
Johnson, Douglas H., Terry L. Shaffer, and Patrick J. Gould. 1993. Incidental catch of marine birds in the North Pacific high seas driftnet fisheries in 1990. International North Pacific Fisheries Commission Bulletin 53:473-483. http://www.npwrc.usgs.gov/resource/birds/icatch/index.htm
Creation and Review Dates
DIF Creation Date:
2002-01-28
Last DIF Revision Date:
2012-12-21
Future DIF Review Date:
2003-01-28
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