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Observations on the biology and ecology of rainbow trout, Oncorhynchus mykiss, and its implications for fisheries in the highlands of Papua New Guinea

Sepik River Fish Stock Enhancement Project: PNG/85/001. Field Document No. 21









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    Observations on the biology and ecology of rainbow trout, Oncorhynchus mykiss, and its implications for fisheries in the highlands of Papua New Guinea
    Sepik River Fish Stock Enhancement, Papua New Guinea
    1993
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    This report provides preliminary information on the biology and ecology of rainbow trout, Oncorhynchus mykiss, in highland streams of Papua New Guinea. The extent of success of its introduction and its implication on any future introductions of other coldwater fish species are discussed. The relevance of trout to the Sepik River Fish Stock Enhancement Project (SRFSEP) is based on the fact that salmonid trouts were the first exotic fishes to be introduced to Papua New Guinea for the purpose of enhancing fish stocks (West & Glucksman 1976). Furthermore, a follow-on project based on recommendations given by SRFSEP and dealing with stocking higher altitude rivers in order to improve fisheries in highland areas commenced in March 1993 (FISHAID; see Coates 1992). The presence of rainbow trout (presumably the only salmonid species established) may have considerable implications for future stocking of other coldwater fish species recommended by SRFSEP and undertaken during the FISHAID projec t.
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    Report on the biology and ecology of the introduced tilapia Oreochromis mossambicus (Peters) (Pisces:Cichlidae) in the Sepik River, Papua New Guinea, and the social and economic impact of its introduction
    Sepik River Fish Stock Enhancement Project: PNG/85/001. Field Document No. 10
    1989
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    The actual landmass of New Guinea and the smaller islands lie between the two major plates, the stable continental plate of Australia to the south and the deeper Pacific basin to the north . The collision and subsequent northward movement of the former and the westward movement of the latter plate has created uplifted sections in the centre of the island thus forming the central highlands. These mountain ranges effectively create two different zoogeographic zones in the northern and southern reg ions of New Guinea. Freshwater fish fauna in the two regions are distinct, the southern species shown a resemblance to the fauna of northern Australian whereas those in the north show a high degree of endemism
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    Evaluation of the Potential for Commercialisation of Small-Scale Fisheries. Papua New Guinea
    Strengthening Capacity for Fisheries Conservation and Management. TCP/PNG/6.611
    1997
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    The commercial development of small-scale coastal fisheries has been viewed as a means of generating rural earnings and other social and economic benefits and has been a Government target in PNG for nearly 45 years. During this period a large public-sector fisheries service has become established which aims to promote, manage and regulate PNG's fisheries. Via this service, numerous programmes, some of which have been very large and ambitious, have been put in place to encourage the commercial de velopment of small-scale fisheries in rural areas.

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