Year: 2005
Type: article
Abstract: Smallmouth bass Micropterus dolomieu is an introduced ˆsh native to North America.This ˆsh has been rapidly spreading its habitat in Japan recently due to illegal introductions.It is necessary to capture smallmouth bass e‹ciently to conserve the aquatic ecosystems.Field experiments were conducted in Lake Aoki to investigate the time zone during which the smallmouth bass were e‹ciently captured by gillnets, while reducing the bycatch of native ˆshes.Motion detectors and acceleration sensors were put on gillnets to record the time when ˆshes were captured.Motion detectors and acceleration sensors record the motion caused by ˆshes entangled on the gillnet.Fish capture time for each individual was estimated from these time-series data.Eighty-six percent of the smallmouth bass were captured from sunrise to sunset.On the other hand, 91 percent of the crucian carp Carassius sp. and 92 percent of the common carp Cyprinus carpio were captured from sunrise to sunset.It is possible to reduce the bycatch of ˆsh such as crucian carp and common carp by soaking the gillnet in the daytime.
Source: NIPPON SUISAN GAKKAISHI
DOI: 10.2331/suisan.71.60
Authors: NAOTO HONDA, KAORU FUJITA
Institution: Japan Fisheries Research and Education Agency
Language: English
Subfield: Nature and Landscape Conservation
Field: Environmental Science
Domain: Physical Sciences
SDG: Life below water
Open Access status: bronze
OpenAlex ID: W1984263263