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Catches of downstream migrating fish in fast-flowing rivers using rotary screw traps

Author: Gerald J Chaput; R A Jones; Gulf Fisheries Centre (Canada)
Publisher: Moncton, NB : Fisheries and Oceans Canada, Gulf Fisheries Centre, 2004.
Series: Canadian manuscript report of fisheries and aquatic sciences, 2688.
Edition/Format:   Print book : Document : National government publication   Computer File : EnglishView all editions and formats
Database:WorldCat
Summary:
The rotary screw trap provides a method of capturing fishes in fast flowing waters with minimal impact on the environment. A rotary screw trap is a passive sampling gear which takes advantage of flowing water to capture and retain downstream migrating fish. The gear is non-size and non-species selective. In sampling from five rivers in New Brunswick (Canada) during the spring and fall seasons, over 20 species of  Read more...
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Details

Material Type: Document, Government publication, National government publication, Internet resource
Document Type: Book, Computer File, Internet Resource
All Authors / Contributors: Gerald J Chaput; R A Jones; Gulf Fisheries Centre (Canada)
OCLC Number: 56344937
Language Note: Summary in French.
Description: v, 14 pages : illustrations.
Series Title: Canadian manuscript report of fisheries and aquatic sciences, 2688.
Responsibility: by G.J. Chaput and R.A. Jones.

Abstract:

The rotary screw trap provides a method of capturing fishes in fast flowing waters with minimal impact on the environment. A rotary screw trap is a passive sampling gear which takes advantage of flowing water to capture and retain downstream migrating fish. The gear is non-size and non-species selective. In sampling from five rivers in New Brunswick (Canada) during the spring and fall seasons, over 20 species of fishes were captured including Atlantic salmon (Salmo salar L.), various species of small cyprinids (dace, chub, shiner), suckers (Catastomus sp.), American eel (Anguilla rostrata L.), and sea lamprey (Petromyzon marinus L.). The size of fish sampled in the traps ranged from emerging salmon fry at 3 cm fork length to adult American eels at over 85 cm in total length. Catches at the traps provided descriptions of downstream fish movements in the spring and fall, variations in species presence and relative abundance among years, within a river system and among rivers.

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