Biological aspects of Leptobrama pectoralis Ramsay and Ogilby 1887 (Leptobramidae) in Merauke, Papua, Indonesia

摘要

Long-fin beach salmon (Leptobrama pectoralis) is an endemic species to Arafura and distributed from northern Australia to Merauke, Southern Papua, Indonesia. The biological information of this species is still limited. This study aimed to provide biological information on long-fin beach salmon to fill the research gap of this fish. Parameters collected including length, weight and gut content. A total of 2,640 specimens were collected gill net landing based in Merauke from February to November 2016. The analysis results showed that maximum length and weight of long-fin beach salmon from Merauke waters were 40.4 cmFL and 859 g. The length-weight relationship formula was found as W= 0.016L~(2.897). The average maximum length (L_∞) and instantaneous growth rate (k) were 42 cm and 0.8 year~(-1) while the total mortality (Z) was estimated as 4.2 year~(-1) and maximum recruitment occurred in November. Length at capture lower than length at maturity (Lc