Length-Weight Relationship and Condition Factor of Introduced Red Devil Cichlid Amphilophus labiatus, in Lake Sentani, Indonesia

Authors

DOI:

https://doi.org/10.31957/jbp.3321

Keywords:

freshwater fish, introduced species , New Guinea, Papua, threat

Abstract

Papua’s freshwater ecosystems in the western part of New Guinea have begun to record widespread introductions of invasive species over the past decade. This lake's most dominant and common exotic species is Amphilophus labiatus (Günther, 1864). A study was conducted to document the length-weight relationship and condition factor of these fish in Lake Sentani. From June to August 2019, fish were caught using floating gillnets at six locations around the lake. Total length (TL) (mm), body depth (mm), and body weight (grams) were measured, and condition factor based on gender, body weight, and body length were observed in 345 fish, including 264 males and 81 males. The growth pattern of A. labiatus is positively allometric, with b values ranging from 3.19 to 3. 20 and coefficients of determination (r2) ranging from 0.84 to 0.87. Although the average body length of A. labiatus males was shorter than females, condition factor (CF) values were not significantly different between the sexes and ranged from 0. 64 to 2.03 (0.97 ± 1.17, mean ± SD). For males, it went from 0.67 to 1.19 (0.94 ± 0.13 mean ± SD). However, monthly CF data show a significant decrease in CF in August, suggesting that spawning events occur in late July or early August. A. labiatus grows well and colonizes habitats throughout Lake Sentani.

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Author Biographies

Henderite L. Ohee, Biology Department, Mathematics and Natural Sciences Faculty, Cenderawasih University

Department of Biology, Cenderawasih University

Norce Mote, Musamus University

Department of Natural Sciences Management, Agriculture Faculty of Musamus University, Papua, Indonesia

Michael A. Rice, University of Rhode Island, USA

Department of Fisheries, Animal & Veterinary Science, University of Rhode Island, Rhode Island, USA

Puguh Sujarta, Cenderawasih University

Biology Department, Natural Sciences and Mathematics Faculty of Cenderawasih University, Papua 99358, Indonesia

Suriani Surbakti, Cenderawasih University

Biology Department, Natural Sciences and Mathematics Faculty of Cenderawasih University, Papua 99358, Indonesia

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Published

2024-04-05

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Section

Research Articles