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A population of Canterbury mudfish Neochanna burrowsius (Phillipps), estimated to exceed 3000 adults in July‐December 1975, and its habitat at Clearwell in mid Canterbury, are described. A 7 month drought nearly extinguished the population; this and the subsequent return migration (in August 1976) of survivors from a stockwater race are recorded.
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Eldon et al. (1978) studied this question.
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