통영해역에 서식하는 아므르불가사리의 분포 특성과 서식처에 따른 먹이 선호도 비교 KCI

Title
통영해역에 서식하는 아므르불가사리의 분포 특성과 서식처에 따른 먹이 선호도 비교
Alternative Title
Distribution Pattern and Feeding Preference of Asterias amurensis (Echinodermata: Asteriidae) in Tongyeong, Korea
Author(s)
백상규; 박흥식; 윤성규; 이순길
KIOST Author(s)
Park, Heung-Sik(박흥식)
Publication Year
2004-12
Abstract
This study examined distributional patterns of Asterias amurensis in Tongyeong, the central South Sea of Korea. The density of the sea star was estimated at 10 chosen sites in the inner and the outer parts of the Tongyeong coast from December 2000. The mean density of the species in this area was 2.4ind./m2. The seasonal surveys conducted at 3 arbitrary chosen sites (i.e., sea cage, reef and soft sediment) also showed that the abundance of the species at the sea cage site (density: 3.6ind./m2; biomass: 250.7gwwt/m2) was significantly higher than at the reef site (density: 1.7ind./m2; biomass: 63.5gwwt/m2) and the soft sediment site (density: 0.4ind./m2; biomass: 18.9gwwt/m2). Densities were higher at sea cages areas than at reefs and soft bottom sites. At sea cage site, A. amurensis population exhibited a strong aggregated distributional pattern. In contrast, at reef and soft bottom sites, A. amurensis population showed a random distributional pattern. The spatial difference in prey species and its abundance was the primary factor determining the spatial heterogeneity of the sea star in its behavior characteristics. Experiments on the feeding preference indicated that A. amurensis had a strong selectivity on its prey, but this selectivity varied between populations living in different sites. In particular, A. amurensis populations at the reef site showed a strong selectivity on various sessile and mobile animals living in reef areas, suggesting that these animal groups may play a role as “windows for the survival of A. amurensis”. These results suggest that the distribution of A. amurensis in Tongyeong is closely associated with abundance of prey species and the bottom composition.
ISSN
0374-8111
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5176
Bibliographic Citation
한국수산과학회지, v.37, no.6, pp.469 - 477, 2004
Publisher
한국수산과학회
Keywords
Asterias amurensis; Spatial distribution; Feeding preference; South Sea
Type
Article
Publisher
한국수산과학회
Related Researcher
Research Interests

Marine ecology,Marine biology,Marine living resources,해양생태,해양생물 생리,해양생물자원

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