지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
Exotic species in aquatic ecosystem generate various problems domestically as well as globally. Largemouth bass (Micropterus salmoides) which is a well-known exotic species globally,acts as a substantial disturbance factor on the native fish communities in Korea due to the high predation pressure and hence designated as a ecologically harmful species by Ministry of Environment.
In this study, we investigated the impact of largemouth bass on Korean native fish population,crucian carp (Carassius auratus), to identify responses of the prey fish. Two fish species were collected at seven reservoirs distributed at the Nakdong River catchment area, and changes in lengthfrequency and length-weight relationship (LWR) were analysed depending on existence of largemouth bass. At bass absent sites, ratio of under age 1 year individuals were small, and over age two years were dominant. Conversely, normal length-frequency distribution pattern was identified at bass absent sites. The LWR of crucian carp (fish smaller than total length of 160 mm were only considered as it is frequently consumed by bass predation) was different depending upon bass existence. The value of parameter b at bass absent reservoirs was 2.909, which was smaller than that of bass present reservoirs, 3.100. Our results imply that crucian carp at bass present reservoirs presented a different strategy to survive from predation by bass, through relatively rapid growth. We propose that other native species might have similar growth strategies like crucian carp.
목차
등록된 정보가 없습니다.
참고문헌 (27)
참고문헌 신청
Azuma M / 1992 / Ecological release in feeding behavior, the case of Bluegills in Japan / Hydrobiologia 243 : 269 ~ 276
Byeon HK / 1997 / Feeding habit of Bluegill, Lepomis macrochirus introduced in Korea / Korean J. Environ. Biol 15 : 165 ~ 174
Byeon HK / 1997 / Feeding habit of Bluegill, Lepomis macrochirus, introduced at lake Paldang / Korean J. Limnol 30 : 75 ~ 81
Han M / 2008 / Species richness of exotic and endangered fishes in Japan’s reservoirs / Environ. Biol. Fish 83 : 409 ~ 416
Hoyle JA / 1987 / The effect of prey morphology and size on handling time in a piscivore, the Largemouth bass (Micropterus salmoides) / Can. J. Zool 65 : 1972 ~ 1977
Byeon HK / 1997 / Feeding habit of Bluegill, Lepomis macrochirus introduced in Korea / Korean J. Environ. Biol 15 : 165 ~ 174
Byeon HK / 1997 / Feeding habit of Bluegill, Lepomis macrochirus, introduced at lake Paldang / Korean J. Limnol 30 : 75 ~ 81
Han M / 2008 / Species richness of exotic and endangered fishes in Japan’s reservoirs / Environ. Biol. Fish 83 : 409 ~ 416
Hoyle JA / 1987 / The effect of prey morphology and size on handling time in a piscivore, the Largemouth bass (Micropterus salmoides) / Can. J. Zool 65 : 1972 ~ 1977
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