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首页> 外文期刊>Limnologica >Interspecific competition for a shelter between non-native racer goby and native European bullhead under experimental conditions - Effects of season, fish size and light conditions
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Interspecific competition for a shelter between non-native racer goby and native European bullhead under experimental conditions - Effects of season, fish size and light conditions

机译：在实验条件下，非本地比目鱼虎鱼和欧洲原头bull鱼之间的避难所的种间竞争-季节，鱼类大小和光照条件的影响

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Under laboratory conditions, we assessed by video-recorder whether or not the interference competition of invading racer goby Babka gymnotrachelus affects the habitat (refuge) use and behaviour of European bullhead Cottus gobio, a native nest-guarding species, during and after the spawning season, spring and autumn respectively, when available refuge (nesting) habitat is limited. A bullhead was placed in a tank for 24h and then an intruder, either a goby or another bullhead was added for the next 24h. We assessed: (1) the time spent by the two fish in the shelter; and (2) acts of aggression and attempts to enter the shelter. In spring, the amount of time spent in the shelter by the bullhead was considerably lower in the presence of a racer goby of larger or equal size than when the bullhead was alone. In autumn, bullheads occupied shelters at a similar frequency with and without a goby present. Smaller gobies were not able to replace bullhead residents in the shelter. Racer gobies were much more aggressive than bullheads of equal or smaller size, particularly in spring. Bullheads kept outside of the shelter by a resident goby made more attempts to enter the refuge during spring. In summary, under experimental conditions, racer gobies modified the typical behaviour of bullheads by reducing the use of shelter and potential nesting places. (C) 2015 Elsevier GmbH. All rights reserved.
机译：在实验室条件下，我们通过录像机评估了入侵的虾虎鱼Babka Gymnotrachelus的干扰竞争是否会在产卵季节期间和之后影响欧洲bull头Co（Cottus gobio）（一种原生鸟巢保护物种）的栖息地（避难所）使用和行为，分别在春季和秋季，当可用的避难所（巢）栖息地有限时。将防弹头放置在水箱中24小时，然后在接下来的24小时添加入侵者，即虾虎鱼或另一只防弹头。我们评估：（1）两条鱼在避难所中所花费的时间; （2）侵略和企图进入庇护所。在春季，与较大的或同等大小的赛车虾虎鱼相比，由alone头呆在庇护所中的时间要少得多。在秋天，无论有没有虾虎鱼，顽固的头目都以类似的频率占领避难所。较小的虾虎鱼无法代替庇护所中的顽固居民。赛车虾虎鱼比同等大小或更小的牛头更具攻击性，尤其是在春季。春季，常驻虾虎鱼把顽固的家伙留在庇护所外面，他们试图进入避难所。总而言之，在实验条件下，go虾虎鱼通过减少避难所的使用和潜在的筑巢场所来改变牛头犬的典型行为。 （C）2015 Elsevier GmbH。版权所有。

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