Fish Assemblages and Environmental Variables Associated with Gobiids in Nearshore Areas of the Lower Great Lakes
Fish Assemblages and Environmental Variables Associated with Gobiids in Nearshore Areas of the Lower Great Lakes
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DOI：
10.3394/0380-1330(2008)34
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发表时间：
2008-09-01
影响因子：
2.2
通讯作者：
Mandrak, Nicholas E.
中科院分区：
文献类型：
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作者：
Dopazo, Silvia N.;Corkum, Lynda D.;Mandrak, Nicholas E.
我们调查了五大湖下游休伦-伊利走廊加拿大近岸水域中哪些鱼类和环境变量与入侵性圆虾虎鱼（Neogobius melanostomus）和管鼻虾虎鱼（Proterorhinus marmoratus）相关。 2006 年夏季，我们测量了一系列环境变量，并使用一式三份的海滩围网样本来收集鱼类。白天对 30 个地点进行了采样，并在夜间对一个子集（n = 14）进行了采样。在白天捕获的 1,955 条样本中，圆虾虎鱼 (21.0%)、斑尾闪光鱼 (17.3%) 和翡翠闪光鱼 (14.2%) 的数量最多。在夜间采集的 1,521 只个体中，最丰富的物种是圆形虾虎鱼 (42.3%) 和翡翠光泽鱼 (24.1%)。管鼻虾虎鱼分别占白天和夜间捕获的所有个体的 1% 和 1.7%。稀疏分析表明，白天总体物种丰富度高于夜间。夜间捕获的翡翠光泽鱼（P = 0.017）、岩鲈（P = 0.046）和圆虾虎鱼（P = 0.035）明显多于白天；白天捕获的木鲈数量多于夜间（P = 0.042）。圆形虾虎鱼与高达 24 度的水温呈正相关，但圆形虾虎鱼的数量与较高的温度之间没有关系。捕获的管鼻虾虎鱼太少，无法确定它们与环境因素的统计关联；然而，只有在收集圆形虾虎鱼的地方才能发现管鼻虾虎鱼。圆虾虎鱼和管鼻虾虎鱼与黄鲈和岩鲈有关。底栖圆形虾虎鱼是最丰富的物种，而其他丰富的物种是远洋成群鱼类，其栖息地与圆形虾虎鱼不同。
We investigated which fish species and environmental variables were associated with the invasive round goby (Neogobius melanostomus) and tubenose goby (Proterorhinus marmoratus) in nearshore Canadian waters of the Huron-Erie corridor of the lower Great Lakes. We measured a suite of environmental variables and used triplicate beach seine samples to collect fishes in summer 2006. Thirty sites were sampled in the day and a subset (n = 14) at night. Of 1,955 individuals caught in daytime samples, round goby (21.0 %), spottail shiner (17.3%) and emerald shiner (14.2%) were most abundant. Of 1,521 individuals collected at night, the most abundant species were round goby (42.3%) and emerald shiner (24.1 %). Tubenose gobies represented 1 % and 1.7% of all individuals caught in the day and night, respectively. Rarefaction analysis showed that overall species richness was greater in the day than night. Significantly more emerald shiner (P = 0.017), rock bass (P = 0.046) and round goby (P = 0.035) were caught at night than in the day; more logperch were caught in the day than at night (P = 0.042). Round gobies were positively associated with water temperatures up to 24 degrees, but there was no relationship between round goby abundance and warmer temperatures. There were too few tubenose goby captured to determine their statistical association with environmental factors; however, tubenose gobies were found only where round gobies were collected. Round goby and tubenose goby were associated with yellow perch and rock bass. The benthic round goby was the most abundant species, whereas other abundant species were pelagic, schooling fishes that occupied a habitat distinct from round goby.