Differences in diet compositions and feeding strategies of invasive round goby Neogobius melanostomus and native black goby Gobius niger in the Western Baltic Sea

IF 2.2 3区 环境科学与生态学 Q2 ECOLOGY Aquatic Invasions Pub Date : 2021-01-01 DOI:10.3391/AI.2021.16.2.07
S. Matern, J. Herrmann, A. Temming
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引用次数: 7

Abstract

The round goby Neogobius melanostomus (Pallas, 1814) is a global invader that has become established in the Baltic Sea and expands its geographic range further west. Native in the Baltic Sea, the black goby Gobius niger Linnaeus, 1758 occupies a similar ecological niche as the round goby. To investigate a potential dietary overlap, we sampled eleven locations between Travemünde and Flensburg by angling. We caught round goby in the coastal areas of the Lübeck Bight, Fehmarnsund and Kiel Fjord, while black goby were caught at all sampling sites except Travemünde. Individuals of round goby and black goby from all sites, except Kappeln, were kept for stomach content analyses. The diet analyses revealed round goby in the Western Baltic to mainly prey on either barnacles or mollusks. Black goby had a broader prey spectrum including large amounts of crustaceans, annelids and mollusks. Furthermore, we revealed some black goby individuals to be specialized on fish. The dietary overlap between the two goby species was low and suggests that the absence of black goby in Travemünde cannot be referred to competition for food with round goby.
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波罗的海西部入侵圆形虾虎鱼黑口新虾虎鱼与本地黑虾虎鱼饮食组成及摄食策略的差异
圆形虾虎鱼Neogobius melanostomus (Pallas, 1814)是一种全球性的入侵者,已在波罗的海建立并将其地理范围进一步向西扩展。1758年产于波罗的海的黑虾虎鱼(Gobius niger Linnaeus)与圆虾虎鱼有着相似的生态位。为了调查潜在的饮食重叠,我们通过垂钓方法对travem nde和弗伦斯堡之间的11个地点进行了采样。我们在l贝克湾、Fehmarnsund和Kiel峡湾的沿海地区捕获了圆形虾虎鱼,而在除travem nde以外的所有采样点都捕获了黑色虾虎鱼。除Kappeln外,所有地点的圆虾虎鱼和黑虾虎鱼个体都被保留用于胃内容物分析。饮食分析显示,波罗的海西部的圆虾虎鱼主要捕食藤壶或软体动物。黑虾虎鱼的猎物范围更广,包括大量的甲壳类动物、环节动物和软体动物。此外,我们还发现了一些专门捕食鱼类的黑虾虎鱼。两种虾虎鱼的饮食重叠度很低,这表明在travem nde中没有黑色虾虎鱼不能被认为是与圆形虾虎鱼竞争食物。
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来源期刊
Aquatic Invasions
Aquatic Invasions ECOLOGY-MARINE & FRESHWATER BIOLOGY
CiteScore
4.30
自引率
0.00%
发文量
20
审稿时长
6-12 weeks
期刊介绍: Aquatic Invasions is an open access, peer-reviewed international journal focusing on academic research of biological invasions in both inland and coastal water ecosystems from around the world. It was established in 2006 as initiative of the International Society of Limnology (SIL) Working Group on Aquatic Invasive Species (WGAIS) with start-up funding from the European Commission Sixth Framework Programme for Research and Technological Development Integrated Project ALARM. Aquatic Invasions is an official journal of International Association for Open Knowledge on Invasive Alien Species (INVASIVESNET). Aquatic Invasions provides a forum for professionals involved in research of aquatic non-native species, including a focus on the following: • Patterns of non-native species dispersal, including range extensions with global change • Trends in new introductions and establishment of non-native species • Population dynamics of non-native species • Ecological and evolutionary impacts of non-native species • Behaviour of invasive and associated native species in invaded areas • Prediction of new invasions • Advances in non-native species identification and taxonomy
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