作者: Peter S. Maitland
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摘要: In the British Isles, Arctic charr (Morton 1955), Salvelinus alpinus (L.) (see Fig. 1), in individual lakes have been isolated from each other for thousands of years and developed a variety phenotypic characteristics (Gunther 1865; Day 1887; Regan 1909, 1914) which are probably genetically based (Nyman 1972; Child 1977, 1984; Ferguson 1981). The differences between some populations so great that many were originally described as distinct species.