A Comparative Study of Fish Assemblages Near Aquaculture, Artificial and Natural Habitats  

作　　者：WANG Zhenhua CHEN Yong ZHANG Shouyu WANG Kai ZHAO Jing XU Qiang 

机构地区：[1]College of Marine Sciences, Shanghai Ocean University [2]School of Marine Sciences, University of Maine

出　　处：《Journal of Ocean University of China》2015年第1期149-160,共12页中国海洋大学学报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China (863 Program, No. 2006AA100303);the National Basic Research Program of China (No. 2011CB111608);partially supported by the Maine Sea Grant College Program at the University of Maine in the USA

摘　　要：Habitat plays a critical role in regulating fish community structure. Using the data collected from a monthly trammel net survey in Ma'an archipelago off the east coast of China, we evaluated impacts of five different habitats(artificial reefs, mussel farms, cage aquaculture, rocky reefs and soft bottom) on fish assemblages. This study suggests that artificial reefs(AR) have significantly higher species richness, abundance and diversity than mussel farms(MF) or soft bottom(SB) habitats during most seasons, and that fish taxa in the AR habitats are similar to those in the rocky reef(RR) habitats. Two different fish assemblage patterns were revealed in the study area using non-metric multidimensional scaling ordination: an assemblage dominated by reef fishes(especially by Scorpaenidae species) in AR, RR and cage aquaculture(CA) habitats and an assemblage dominated by Sciaenidae species in MF and SB habitats. We suggest that reef fishes play a key role in differentiating fish community structures in the study area. Although few differences in fish abundance and diversity were found between the CA and SB habitats, a more diverse age structure was observed in the CA habitats. A much more complex fish assemblage and enhanced population of local species were established as a result of the presence of both floating and fixed artificial structures, probably through improved survival rates.Habitat plays a critical role in regulating fish community structure. Using the data collected from a monthly trammel net survey in Ma＇an archipelago off the east coast of China, we evaluated impacts of five different habitats （artificial reefs, mussel farms, cage aquaculture, rocky reefs and soft bottom） on fish assemblages. This study suggests that artificial reefs （AR） have significantly higher species richness, abundance and diversity than mussel farms （MF） or soft bottom （SB） habitats during most seasons, and that fish taxa in the AR habitats are similar to those in the rocky reef （RR） habitats. Two different fish assemblage patterns were revealed in the study area using non-metric multidimensional scaling ordination： an assemblage dominated by reef fishes （especially by Scor- paenidae species） in AR, RR and cage aquaculture （CA） habitats and an assemblage dominated by Sciaenidae species in MF and SB habitats. We suggest that reef fishes play a key role in differentiating fish community structures in the study area. Although few dif- ferences in fish abundance and diversity were found between the CA and SB habitats, a more diverse age structure was observed in the CA habitats. A much more complex fish assemblage and enhanced population of local species were established as a result of the presence of both floating and fixed artificial structures, probably through improved survival rates.

关 键 词：artificial reef species diversity fish culture mussel culture aquaculture facility fish assemblage 

分 类 号：S932.4[农业科学—渔业资源]