Evaluation of seal harassment techniques to protect gill netted salmon.

Authors:

Geiger, A.C. and S.J. Jeffries

Year:

1987

Journal/Publisher Name:

Pp. 37-55 in B.R. Mate and J.T. Harvey (eds.): Acoustical Deterrents in Marine Mammal Conflicts with Fisheries. Oregon State University Sea Grant College Program No. ORESU-W-86-001. 116 pp.

Harbor seals (Phoca vitulina) appeared to habituate to acoustic harassment devices placed on gillnets in the Oregon salmon fishery. Results, although inconclusive, demonstrate a possible reduction in ??˛damaged??ˇ salmon, at least in the short-term.
Field Studies:

Location	Fishing gear	Reduction technique	Bycatch species	Effect on bycatch species	Catch	Effect on target catch	Type
Oregon	Gillnets	Acoustic harassment devices	Pinnipeds	Seals habituated to AHDs	Salmon	Preliminary results indicate fewer damaged salmon	In the wild