Behavioral interactions between round gobies (Neogobius melanostomus) and mottled sculpins (Cottus bairdi)
Behavioral interactions between round gobies (Neogobius melanostomus) and mottled sculpins (Cottus bairdi)
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DOI：
10.1016/s0380-1330(96)71005-5
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发表时间：
1996-01-01
影响因子：
2.2
通讯作者：
Corkum, LD
中科院分区：
文献类型：
--
作者：
Dubs, DOL;Corkum, LD
我们研究了两个物种的底栖附着，非土著圆虾虎鱼（Neogobius melanostomus）和相对斑驳的杜父鱼（杜父鱼）之间的领土行为和相互作用。在实验室中使用红外视频摄影观察相互作用24小时。试验进行了使用圆虾虎鱼或斑驳杜父鱼居民在一个避难所。随机添加一个入侵者（圆形虾虎鱼或斑点杜父鱼）。鱼（每次试验前禁食24小时）仅使用一次。食物（钩虾，片足类），保持在饱足水平以下（估计从功能性喂养实验），被用来增强相互作用，超过24小时，在避难所的居民圆虾虎鱼花费的时间量没有改变入侵者时，存在（圆虾虎鱼或斑驳的杜父鱼）。一个居民斑驳杜父鱼在避难所超过24小时所花费的时间显着减少在一个圆虾虎鱼入侵者的存在下，但不是在一个斑驳杜父鱼入侵者的存在。圆虾虎鱼和斑点杜父鱼在夜间比白天在避难所外呆的时间更长。居民圆虾虎鱼和斑驳的杜父鱼花了更多的时间在一个避难所在晚上，当一个同种存在，甚至更多的时间在避难所时，另一个物种的鱼被引入。居民圆虾虎鱼的方法，追逐和叮咬的平均数量显着大于入侵者。斑点杜父鱼入侵者从未表现出任何攻击性行为（方法，追逐，叮咬）。在斑点杜父鱼居住的情况下，一个圆形的虾虎鱼入侵者表现出更多的行为（方法，追逐，叮咬），比居民杜父鱼更具侵略性（方法）。在自然界中，圆虾虎鱼的侵略习惯可能会导致斑点杜父鱼的死亡。
We examined territorial behaviors and interactions between two species of benthic clingers, nonindigenous round gobies (Neogobius melanostomus) and relative mottled sculpins (Cottus bairdi). Interactions were observed for 24 h using infrared video photography in the laboratory. Trials were conducted using either a round goby or mottled sculpin resident in a shelter. An intruder (either a round goby or mottled sculpin) was added at random. Fish (fasted for 24 h before each trial) were used only once. Food (Gammarus, amphipods), maintained below satiation levels (estimated from functional feeding experiments), was used to enhance interactions, Over 24 h, amount of time spent in a refuge by a resident round goby did not change when intruders were present (round gobies or mottled sculpins). Time spent in a refuge over 24 h by a resident mottled sculpin was significantly reduced in the presence of a round goby intruder, but not in the presence of a mottled sculpin intruder. Both round gobies and mottled sculpins spent more time outside a refuge during the night than during the day. Resident round gobies and mottled sculpins spent more time in a refuge at night when a conspecific was present and even more time in the refuge when a fish of another species was introduced. The mean number of approaches, chases, and bites by resident round gobies was significantly greater than those of intruders. Mottled sculpin intruders never exhibited any aggressive behaviors (approaches, chases, bites). In cases where mottled sculpins were resident, a round goby intruder exhibited a greater number of acts (approaches, chases, bites) that were more aggressive compared to the resident sculpin (approaches). In nature, the aggressive habits of round gobies will likely result in the demise of mottled sculpins.