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首页> 外文期刊>Turkish Journal of Fisheries & Aquatic Sciences >Fish Community Structure in the Mediterranean Temperate Lake Volvi at Two Different Stages of Pumpkinseed Invasion: are Natives in Threat?
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Fish Community Structure in the Mediterranean Temperate Lake Volvi at Two Different Stages of Pumpkinseed Invasion: are Natives in Threat?

机译：在南瓜子入侵的两个不同阶段，地中海温带沃尔维湖的鱼类群落结构：土著人受到威胁吗？

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摘要

Lepomis gibbosus (L., 1758) (pumpkinseed) has been introduced in Greece accidentally and since then it has expanded its range and adapted successfully to several surface water bodies. Here, we provide baseline data on the status of fish community structure in the Mediterranean temperate Lake Volvi (Northern Greece) at the begging and three years after pumpkinseed`s invasion. Additionally, we present some aspects on pumpkinseed`s population characteristics to test the hypotheses of its invasion success and the potential impacts imposed to native fish populations. Fish sampling was conducted by benthic and pelagic, Nordic type, gillnets. A breeding population had become established in the lake within the three-years period studied. At the same time a decline in the abundance of some native fish species was observed. Pumpkinseed preferred the shallower habitats and exhibited trait similarity with the most native species, imposing thus a potential competed threat for local populations, especially for endemics that allocate the same habitats and compete for the same food resources with it. The efforts that should be implemented for the depreciation of species population and assessment of the general impacts of pumpkinseed invasion on natives are discussed.
机译：Lepomis gibbosus（L.，1758）（南瓜籽）意外地引入了希腊，此后扩大了范围，成功地适应了几种地表水体。在这里，我们提供了乞讨期和入侵南瓜籽三年后地中海温带沃尔维湖（希腊北部）鱼类群落结构状况的基准数据。此外，我们介绍了南瓜籽种群特征的一些方面，以检验其入侵成功的假设以及对本地鱼类种群的潜在影响。鱼类采样采用底栖和中上层（北欧型）刺网进行。在所研究的三年内，湖中已经建立了繁殖种群。同时，观察到一些本地鱼类的丰度下降。南瓜籽更喜欢较浅的生境，并表现出与大多数本地物种相似的性状，因此对当地居民，尤其是那些分配相同生境并与之争夺相同食物资源的地方性物种构成潜在的竞争威胁。讨论了应采取的措施，以减少物种数量并评估南瓜子入侵对当地人的一般影响。

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