作者: Martin Thiel , Karsten Reise
DOI: 10.1016/0077-7579(93)90006-E
关键词:
摘要: Abstract Two common nemertines of the European Wadden Sea, Lineus viridis and Amphiporus lactifloreus, occur preferentially in clusters mussels, spread over sedimentary flats upper intertidal near island Sylt. The heteronemertine L. preys mainly on polychaete Nereis diversicolor. hoplonemertine A. lactifloreus feeds almost exclusively amphipod Gammarus locusta. Abundance both predators their respective prey field showed inverse relationships. Experimentally increased numbers mussels caused a gradual decrease nereid abundance sediment underneath period 1 month, suggesting that losses individuals were by capture. followed an escape response gammarids from within 2 d. In aquaria, species exhibited prolonged swimming activity when lurked at bottom. We conclude behaviour N. diversicolor may be only effective during its migrant phases, while G. locusta is permanently alert to avoid encounters with predator. This refuging endobenthic has strong implications distribution, actual consumption relatively modest. Enclosure experiments aquaria lead overestimates capture not accounted for.