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The Efficacy of Illumination to Reduce Bycatch of Eulachon and Groundfishes Before Trawl Capture in the Eastern North Pacific Ocean Shrimp Fishery

The Efficacy of Illumination to Reduce Bycatch of Eulachon and Groundfishes Before Trawl Capture in the Eastern North Pacific Ocean Shrimp Fishery

Kategori
Tidsskriftspublikasjon
Sammendrag
This study examined the extent that eulachon (Thaleichthys pacificus) and groundfishes escape trawl entrainment in response to artificial illumination along an ocean shrimp (Pandalus jordani) trawl fishing line. Using a double-rigged trawler, we compared the catch efficiencies for ocean shrimp, eulachon, and groundfishes between an unilluminated trawl and a trawl illuminated with 5 green LEDs along its fishing line. Results showed a significant reduction in the bycatch of eulachon and yellowtail rockfish (Sebastes flavidus) in the presence of LED illumination. As eulachon are an Endangered Species Act listed species, this finding provides valuable information for fishery managers implementing recovery plans and evaluating potential fishery impacts on their recovery and conservation. For other rockfishes (Sebastes spp.) and flatfishes, however, we did not see the same effect as the illuminated trawl caught similarly or significantly more fishes than the unilluminated trawl. Prior to this research, the extent that eulachon and groundfishes escape trawl capture in response to illumination along an ocean shrimp trawl fishing line was unclear. Our study has provided results to fill that data gap.
Språk
Engelsk
Forfatter(e)
  • Lomeli Mark J. M.
  • Groth Scott D.
  • Blume Matthew
  • Herrmann Bent
  • Wakefield W. Waldo
Institusjon(er)
  • USA
  • UiT Norges arktiske universitet
  • SINTEF Ocean / Sjømatteknologi
  • Oregon State University
År
2019
Publisert i
Canadian Journal of Fisheries and Aquatic Sciences
ISSN
0706-652X
Årgang
77
Side(r)
44 - 54