Effects of changes in seagrass shoot density and leaf height on abundances and distribution patterns of juveniles of three gobiid fishes in a Zostera marina bed
Effects of changes in seagrass shoot density and leaf height on abundances and distribution patterns of juveniles of three gobiid fishes in a Zostera marina bed
复制标题
海草芽密度和叶高变化对大叶藻滨床中三种戈壁鱼幼体丰度和分布格局的影响
DOI：
10.3354/meps183087
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发表时间：
1999
影响因子：
2.5
通讯作者：
M. Sano
中科院分区：
文献类型：
--
作者：
Masahiro Horinouchi;M. Sano
通过在日本三浦半岛Moroiso湾和Aburatsubo湾的野外实验，研究了海草Zostera marina栖息地结构复杂性的变化对带状翼鱼(Pterogobius Zonolucus)、七叶鱼(Chaenogobius 77tacantus)和沙鱼(Chasmichthys Guosus)幼鱼密度的影响。在海草处理后，包括降低叶片高度和枝条密度以及完全去除海草，在海草稀少或较短的样方中，所有3种沙鼠的幼体密度都较高，清除海草的样方的幼体密度始终高于对照。在枝条密度最低的样方中，幼虫栖息在枝条之间，并均匀分布在水平面上。在海草最短的样方中，幼体出现在树冠上方，并与海草清除样方中的位置相同，即靠近未经处理的海草的周围墙壁。相比之下，在缺少未经处理的海草围墙的实验斑块中，没有出现幼虫。结果表明，水柱状分布的3种海草幼鱼更喜欢稀疏的海草和靠近未处理海草的开阔区域。
The effects of changes in the structural complexity of a seagrass Zostera marina habitat on the densities of juveniles of 3 gobiid fishes, Pterogobius zonoleucus, Chaenogobius heptacanthus and Chasmichthys gulosus, were investigated by field experimentation at Moroiso and Aburatsubo Bays, Miura Peninsula, Japan. Following seagrass manipulation, involving reduction of leaf heights and shoot densities as well as complete removal of seagrass, juvenile densities of all 3 gobiids were found to be higher in those quadrats with sparser or shorter seagrass, the abundance in the seagrass-cleared quadrat always being greater than that in the control. In the quadrat with the lowest shoot density, juveniles resided among the shoots, and were evenly distributed over a horizontal plane. In the quadrat with the shortest seagrass, juveniles appeared above the canopy, and were positioned as in the seagrass-cleared quadrat, i.e. near the surrounding walls of untreated seagrass. By contrast, in the experimental patches lacking surrounding walls of unmanipulated seagrass, no juveniles appeared. The results indicated that water column-distributed juveniles of the 3 gobiid species prefer sparser seagrass and open areas close to the wall of untreated seagrass.