Behavioral dependent dispersal in the invasive round goby Neogobius melanostomus depends on population age

作     者：Magnus THORLACIUS Gustav HELLSTROM Tomas BRODIN 

作者机构：Department of Ecology and Environmental Science Umea University Linnaeus v/ig 6 90187 Umeh Sweden 

出 版 物：《Current Zoology》 (动物学报（英文版）)

年 卷 期：2015年第61卷第3期

页      面：529-542页

核心收录：

学科分类：0710[理学-生物学] 0832[工学-食品科学与工程（可授工学、农学学位）] 12[管理学] 120203[管理学-旅游管理] 1202[管理学-工商管理] 0907[农学-林学] 07[理学] 090705[农学-野生动植物保护与利用] 08[工学] 09[农学] 0713[理学-生态学] 

主　　题：行为表现 虾虎鱼 分散 年龄 人口 生物入侵 生态功能 入侵物种 

摘      要：Biological invasions cause major ecological and economic costs in invaded habitats. The round gobyNeogobius melanostomusis a successful invasive species and a major threat to the biodiversity and ecological function of the Baltic Sea. It is native to the Ponto-Caspian region and has, via ballast water transport of ships, invaded the Gulf of Gdansk in Poland. Since 1990, it has spread as far north as Raahe in Northern Finland (64°41′04N, 24°28′44E). Over the past decade, consistent individual differences of behavioral expressions have been shown to explain various ecological processes such as dispersal, survival or reproduction. We have previously shown that new and old populations differ in personality trait expression. Individuals in new populations are bolder, less sociable and more active than in old populations. Here we investigate if the behavioral differentiation can be explained by phenotype-dependent dispersal. This was investigated by measuring activity, boldness and sociability of individually marked gobies, and subsequently allowing them to disperse in a system composed of five consecutive tanks connected by tubes. Individual dispersal tendency and distance was measured. Our results revealed that in newly established populations, more active individuals disperse sooner and that latency of a group to disperse depends on the mean sociability of the group. This indicates the presence of personality dependent dispersal in this species and that it is maintained at the invasion front but lost as the populations get older.