Holland PWHNovember 1996Journal article Journal:Journal of Evolutionary BiologyVolume:9Issue:6, Oxford University Press (OUP), pp.1034 - 1036No abstract availableKeywords:3109 Zoology , 3103 Ecology , 3104 Evolutionary Biology , 31 Biological Sciences DOI10.1046/j.1420-9101.1996.9061034.x