Biological plasticity of non-native European perch (Perca fluviatilis) populations and the implications for management in northern New Zealand

摘要: Size and age structure, longevity, growth, reproductive activity of European perch (Perca fluviatilis) were studied at Lake Wainamu in March 2012 2013 as part an introduced species eradication programme. structure P. fluviatilis dominated by smaller younger individuals, while maximum was estimated 6 5 years for both years, respectively. Initial growth the end first year faster when compared with selected studies Europe, but size-at-equivalent thereafter Wainamu. Oocyte atresia, asynchronous gonad development vitellogenic oocytes prevalent ovaries time sampling later summer, which warrant further investigation iteroparous spring-spawning northern New Zealand. Our findings imply that population dynamics are highly plastic may be influenced local biogeographical factors. This has strong implications management New...