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

Anders Faaborg Povlsen;Fisheries and Aquaculture Management Division

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

Year of publication 1993

Pages p.22

Author Anders Faaborg Povlsen;Fisheries and Aquaculture Management Division

Product type Project

Edition 1

Full item page

Synopsis (short abstract) 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.

Cite this content as:

Povlsen, A.F. May 1993. Observations on the biology and ecology of rainbow trout, Oncorhynchus mykiss, and its implications for fisheries in the highlands of Papua New Guinea. Rome (Italy). 22 p.

Language English

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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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