Current Status of Rainbow Trout, Oncorhynchus mykiss (Walbaum, 1792), Fisheries in Munnar Hills of South India

Q3 Environmental Science

Asian Fisheries Science Pub Date : 2021-12-31 DOI:10.33997/j.afs.2021.34.4.007

J. W. Devaa, Aishwarya Sharma, Ramesh Uthandakalaipandian

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引用次数: 1

Abstract

Rainbow trout, Oncorhynchus mykiss (Walbaum, 1792), is a popular cold-water fish species widely distributed and farmed across the globe. In India, rainbow trout fisheries are common in the Himalayan states and the Western Ghats of South India. The introduction of brown trout, Salmo trutta fario (Linnaeus, 1758), in Munnar, Kerala, India, dates back to 1909. As the farming of brown trout was not successful, rainbow trout were introduced in 1932. However, no data regarding trout fisheries post-1970 are available. Hence, this study aimed to assess the current scenario of O. mykiss fisheries by analysing the existing angling and production records and interviewing the officials in charge. The results showed that O. mykiss fisheries in Munnar are currently endangered, and only a few numbers of O. mykiss stock are found in Rajamallay Stream, which is the present stocking site. Studies have shown that destructive fishing, pollution, siltation, and animal intrusion contributed to the decline of trout stocks in this region. Proper conservative measures, good hatchery conditions, adequate broodstock management, feed improvement, and regular seed stocking can improve the production of O. mykiss in Munnar.

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印度南部Munnar山的彩虹鳟、斑胸鳟（Walbaum，1792）渔业现状

虹鳟，Oncorhynchus mykiss（Walbaum，1792），是一种流行的冷水鱼类，在全球广泛分布和养殖。在印度，虹鳟鱼渔业在喜马拉雅山脉各州和南印度的西高止山脉很常见。褐鳟鱼Salmo trutta fario（林奈，1758年）在印度喀拉拉邦的Munnar引入，可以追溯到1909年。由于褐鳟养殖并不成功，虹鳟于1932年被引进。然而，没有关于1970年后鳟鱼捕捞的数据。因此，本研究旨在通过分析现有的捕鱼和生产记录，并采访负责官员，来评估O.mykiss渔业的现状。结果表明，Munnar的O.mykiss渔业目前处于濒危状态，在Rajamallay溪（目前的放养地）只发现了少量的O.mykiss种群。研究表明，破坏性捕鱼、污染、淤积和动物入侵导致了该地区鳟鱼种群的减少。适当的保守措施、良好的孵化条件、适当的育雏管理、饲料改良和定期放养种子可以提高Munnar的O.mykiss的产量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Asian Fisheries Science Agricultural and Biological Sciences-Food Science

CiteScore

2.20

自引率

0.00%

发文量

期刊介绍： The Asian Fisheries Science (AFS) was first published in 1987. It is an open access SCOPUS indexed publication of the Asian Fisheries Society. Four regular issues are published annually in March, June, September and December. In addition, special issues are published on specific topics. Full texts of the articles are available for free download and there is no publication fee. The journal promotes fisheries science which has an international appeal with special focus on Asian interests.