통영해역에 서식하는 아므르불가사리의 분포 특성과 서식처에 따른 먹이 선호도 비교 = Distribution Pattern and Feeding Preference of Asterias amurensis (Echinodermata: Asteriidae) in Tongyeong, Korea

다국어 초록 (Multilingual 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.

참고문헌 (Reference)

1 Ross, D.J, "Variability in the impact of an introduced predator (Asterias amurensis: Asteroidea) on soft-sediment assemblages" 41 : 1-22, 2003

2 Buttermore, "The introduced northern Pacific seastar Asterias amurensis in Tasmania" 21-25, 1994

3 Grannum, R.K, "The distribution and impact of the exotic seastar, Asterias amurensis (Ltken), in Tasmania" 1996

4 Soliman, "Some notes on the outbreak of the sea star Asterias amurensis versicolor Sladen" kuwa (kuwa): 89-112, 1986

5 Lockhart, S.J, "Size selectivity and energy maximisation of the introduced seastar, Asterias amurensis (Ltken), in Tasmania, Australia" 135 : 35-40, 2001

6 Campbell, "Selective predation of sea stars on two species of mussels" 29 : 1-7, 1989

7 Kim, "Selective feeding on the several bivalve molluscs by starfish" Hokkaido Univ 244-249, 1969

8 Lockhart, S.J, "Preliminary observa- tions of the feeding periodicity and selectivity of the introduced seastar, Asterias amurensis (Ltken), in Tasmania, Australia" 135 : 25-33, 2001

9 Kang, K.H, "Predation of Asterias amurensis and Asterina pectinifera on valua- ble bivalves at different water temperature" 16 : 17-20, 2000

10 Ward, R.D, "Population genetics of the northern Pacific seastar Asterias amurensis (Echinodermata: Asteroidea): allozyme differentia- tion among Japanese, Russian, and recently introduced Tasmanian populations" 124 : 99-109, 1995

11 Stenton-Dozey, J.M.E, "Impact of mussel culture on macrobenthic community structure in Saldanha Bay, South Africa" 39 : 357-366, 1999

12 Wu, "Impact of marine fish farming on water quality and bottom sediment a case study in the sub- tropical environment" 115-145, 1994

13 Park, "Feeding behaviour of the starfish" 171-174, 1985

14 De'ath, G, "Factors affecting the behaviour of crown-of-thorns starfish (Acanthaster planci L.) on the Great Barrier Reef: 2. Feeding pre- ferences" 220 : 107-126, 1998

15 New Haven, "Experimental Ecology on the Feeding of Fishes" Yale Univ Press 1961

16 Fradette, "Ecology of benthic epifauna of the Estuary and Gulf of St factors influencing their distribution and abundance on buoys" 979-999, 1980

17 Krebs, C.J, "Ecological Methodology" Benjamin Cummings 620-, 1999

18 Gaymer, C.F, "Distribution and feeding ecology of the seastars Leptasterias polaris and Asterias vulgaris in the northern Gulf of St. Lawrence, Canada" 81 : 827-843, 2001

19 Lim, "Distribu- tion pattern of macrozoobenthos at the farming ground in the Western part of Chinhae Bay" 115-132, 1992

20 Clarke, K.R, "Change in Marine Communities: An Approach to Statistical Analysis and Interpretation." PRIMER-E Ltd 2001

21 in Sendai Bay, "Biological studies on the population of the starfish" 159-178, 1958

22 Sommer, U, "An experi- mental analysis of the importance of body-size in the seastar-mussel predator-prey relationship" 20 : 81-86, 1999

23 Jung R.H, "A study of the macrozoobenthos at the intensive fish farming ground in the Southern coast of Korea" 7 : 235-246, 2002

24 Paine, "A short term experimental investigation of resource partitioning in a New Zealand rocky intertidal habitat" 1096-1106, 1971