Arthur Rylah Institute for Environmental Research, Department of Sustainability and Environment, 123 Brown St, Heidelberg, Victoria 3084, Australia.
J Fish Biol. 2009 Jul;75(1):113-29. doi: 10.1111/j.1095-8649.2009.02270.x.
This study provides information on habitat selection by the threatened Murray cod Maccullochella peelii peelii at two spatial scales in the Ovens and Murray Rivers in south-eastern Australia. Both adult (> 450 mm total length, L(T)) and age 0 year (< 150 mm L(T)) M. p. peelii selected macro and microhabitats based on structural variables. At the macrohabitat scale, adults selected channel habitats in the river, floodplain channels at high floods and within Lake Mulwala, whereas the floodplain proper was avoided. Adult and age 0 year fish selected similar microhabitats regardless of site or hydrologic conditions, and selection was primarily influenced by the presence of higher loadings of structural woody habitat, higher c.v. in depth, more overhanging vegetation, shallower comparative depths and lower water velocities, closer to the bank. Age 0 year M. p. peelii appeared to select shallower habitats with greater amounts of structural woody habitat, closer to the river bank than adult fish.
本研究提供了在澳大利亚东南部的奥文斯河和墨累河两个空间尺度上，受威胁的默里鳕鱼（Maccullochella peelii peelii）的栖息地选择信息。成年 (> 450 毫米总长度，L(T)) 和 0 龄 (< 150 毫米 L(T)) 麦氏鳕鱼均根据结构变量选择了宏观和微观生境。在宏观生境尺度上，成年鱼选择了河流中的河道生境、高水位时的洪泛区河道和马拉瓦拉湖内的生境，而洪泛区本身则被避开。无论在哪个地点或水文条件下，成年鱼和 0 龄鱼都选择了相似的微观生境，其选择主要受结构木本栖息地更高负荷、深度变异性更大、更多悬垂植被、较浅的相对深度和较低的水流速度的影响，这些因素都更靠近河岸。0 龄麦氏鳕鱼似乎选择了更浅的生境，其中有更多的结构木本栖息地，并且比成年鱼更靠近河岸。
