Round Goby Predation on Smallmouth Bass Offspring in Nests during Simulated Catch-and-Release Angling
Round Goby Predation on Smallmouth Bass Offspring in Nests during Simulated Catch-and-Release Angling
复制标题
模拟捕获和释放钓鱼期间圆虾虎鱼对巢中小口黑鲈后代的捕食
DOI：
10.1577/t03-020
复制
发表时间：
2004
期刊：
影响因子：
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通讯作者：
R. Stein
中科院分区：
文献类型：
--
作者：
G. Steinhart;E. Marschall;R. Stein
Abstract Round goby Neogobius melanostomus first appeared in Lake Erie in 1993 and now occur in extremely high densities in some areas. As known nest predators, round goby currently pose a threat to nest-guarding smallmouth bass Micropterus dolomieu. We conducted manipulative experiments to evaluate the combined effects of round goby predation and catch-and-release angling during 1999–2001 in the Bass Islands, Lake Erie. We quantified how many smallmouth bass offspring were consumed by round goby when nest-guarding smallmouth bass males were present, removed, and recovering from angling-related stress. In 10 h of video observations, we only saw one instance of round goby consuming smallmouth bass offspring while the nest was guarded. Upon removal of nest-guarding smallmouth bass, round goby quickly entered unguarded nests (4.3 round goby/min for nests with unhatched embryos and 1.8 round goby/min for nests with hatched embryos). During experimental catch-and-release angling, round goby consumed an average...
