Parasite infection of the non-indigenous round goby (Neogobius melanostomus) in the Baltic Sea

IF 2.2 3区 环境科学与生态学 Q2 ECOLOGY
H. Ojaveer, A. Turovski, K. Nõomaa
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引用次数: 5

Abstract

Parasites may play several critical functions in marine ecosystems, including possibly influencing introduction success or modifying the roles of non-indigenous species. Based on seasonally replicated sampling, we have investigated parasite communities and infection rates of the non-indigenous round goby Neogobius melanostomus in two localities in the NE Baltic Sea, characterised by different invasion trajectories. The parasite community of the fish was very rich, consisting of at least 24 native parasite species, with moderate mean infection intensity – 9.4 parasites per host. In total 78% of fish were infected with parasites, most frequently hosting 1–3 parasite species per fish. The trematode Diplostomum spathaceum had the highest prevalence (46%), while the acanthocephalan Corynosoma strumosum and the trematode Tylodelphys clavata had the highest infection intensity (mean 6.8 and 7.2, respectively). The seasonal dynamics of prevalence were similar in both localities, with the lowest number of infected fish being found immediately after winter with no clear patterns/differences between other seasons. Broadly similar patterns appeared both for species richness and infection intensity. Both localities displayed very similar patterns of occurrence frequency: both had a few parasite species which were specific to one locality and five species that occurred more frequently in one of the two localities. Binomial regression of the probability of infection identified season, total body length, and sex as significant predictors, but not the locality of sampling. The quantitative model revealed that infection intensity was positively linked to total body length and parasite species richness, and was on average 2.7 individuals higher in summer and autumn than in winter and spring.
波罗的海非本地圆虾虎鱼的寄生虫感染
寄生虫可能在海洋生态系统中发挥若干关键功能,包括可能影响引进成功或改变非本地物种的作用。基于季节性重复采样,我们调查了波罗的海东北部两个具有不同入侵轨迹的地方的非本地圆形虾虎鱼(Neogobius melanostomus)的寄生虫群落和感染率。该鱼的寄生虫群落非常丰富,由至少24种本地寄生虫组成,平均感染强度中等,每宿主9.4只。总共有78%的鱼感染了寄生虫,最常见的是每条鱼携带1-3种寄生虫。感染强度最高的是棘头锥虫,平均感染强度分别为6.8和7.2。两地流行率的季节动态相似,冬季刚过时感染鱼的数量最少,而其他季节之间没有明显的模式/差异。在物种丰富度和感染强度方面出现了大致相似的模式。两个地点的寄生虫发生频率模式非常相似:都有少数几种寄生虫是一个地方特有的,有5种寄生虫在一个地方更频繁地发生。感染概率的二项回归确定季节,总体长和性别是重要的预测因子,但不是采样的地点。定量模型显示,感染强度与体长和寄生物种丰富度呈正相关,夏秋季节平均比冬春季节高2.7个个体。
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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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