Factors affecting the catch and harvest rates of paddlefish downstream of Gavins Point Dam, South Dakota, 2000–2020

نویسندگان

چکیده

Paddlefish, Polyodon spathula (Walbaum), provide an important snagging and bowfishing fishery below Gavins Point Dam in South Dakota. During 2009–2020, catch rates of paddlefish decreased to presumed “normal” lower pre-2004 levels, while (harvest) significantly increased during 2000–2020. Because Paddlefish are highly migratory, both local (i.e., monthly gauge height, precipitation, air temperature near Dam) remote (difference Mississippi Missouri River discharge their confluence) environmental conditions were used explain variation harvest rates. Snagging related October whereby deeper water led Dam. Bowfishing after a 2016 regulation change moved the season from July 1 31, June 30, likely because clarity was greater than July. Mean annual precipitation explained prior change. Our findings, first examine fisheries Dam, suggest that abiotic factors more for explaining channelised River.

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ژورنال

عنوان ژورنال: Fisheries Management and Ecology

سال: 2022

ISSN: ['0969-997X', '1365-2400']

DOI: https://doi.org/10.1111/fme.12596