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过去30年里,提出了种类差异的许多测定(Wihlm1967; Dickman1968; Cairns等;1968;Mcerlean and Mihursky1968)。最近,Kaesler等(1978),在Pielou(19751977,P291——311)工作的基础上,论述了差异指数的选择,并且作出结论:在大多数情况下,鲆科鱼类的指数是适用于实用水生生物生态学中的大多数问题的指数。Kaesler等(1978)进一步阐明鲆科鱼类的指数“不是一种统计学的推算,而是一种生态学家工作的基本单位——标本——差异的实际测算。”鲆科鱼类指数公式为:
Over the past 30 years many assays of species diversity have been proposed (Wihlm 1967; Dickman 1968; Cairns et al; 1968; Mcerlean and Mihursky 1968). Kaesler et al. (1978) recently discussed the choice of difference indices based on the work of Pielou (19751977, P291-311) and concluded that in most cases, the index of the phobia is suitable for practical Index of most problems in aquatic ecology. Kaesler et al. (1978) further clarified that the index of the pest species “is not a statistical estimate, but rather an actual measure of the difference between an ecologist’s basic unit and a specimen.” The fowlfish index formula for: