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High-temperature rearing affects the growth, survival, and reproduction of Melanotaenia ajamaruensis (Allen & Cross 1980)
Melanotaenia ajamaruensis is an endemic rainbow fish in Lake Ajamaru, Papua, Indonesia. This ornamental fish has stunning coloration, but studies of its biological characteristics are still relatively limited. Endemic fish are susceptible to changes in environmental factors, such as temperature. Thi...
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Published in: | IOP conference series. Earth and environmental science 2024-12, Vol.1436 (1), p.12001 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites |
Online Access: | Get full text |
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Summary: | Melanotaenia ajamaruensis is an endemic rainbow fish in Lake Ajamaru, Papua, Indonesia. This ornamental fish has stunning coloration, but studies of its biological characteristics are still relatively limited. Endemic fish are susceptible to changes in environmental factors, such as temperature. This study examined the fish performance reared at ambient (25–26°C) and high temperature (31–32°C) for three periods between March 2021 and August 2022. The first period of research was carried out for 200 days using two-month-old juveniles, followed by a second period of 60 days, then continued with a third period to observe reproductive potential. The results revealed that the survival rate (SR) ranged from 67% to 100%. There was no significant difference in fish length growth (GR-L) or specific growth rate in length (SGR-L) between the two conditions. High temperatures lowered weight growth (GR-W) by 50–66.7% and SGR-W by 43.78-44%, decreased the quantity of vividly colored fish by 30% and rendered the fish unable to reproduce. However, this fish could breed after being kept at ambient temperature for six months despite having significantly inferior reproductive components. High temperatures have been shown to impede the weight growth and reproduction of M. ajamaruensis. |
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ISSN: | 1755-1307 1755-1315 |
DOI: | 10.1088/1755-1315/1436/1/012001 |