Species and size composition of tuna longline catches in the Southes of Java, Indian ocean

*Setiya Triharyuni -  Pusat Penelitian Pengelolaan Perikanan dan Konservasi Sumberdaya Ikan, Jakarta, Indonesia
Budi Iskandar Prisantoso -  Pusat Penelitian Pengelolaan Perikanan dan Konservasi Sumberdaya Ikan, Jakarta, Indonesia
Published: 22 Aug 2012.
Open Access
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Section: Research Articles
Language: EN
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Statistics: 499 14726
Abstract

The growth of long line fleets operating in the south of Java resulted in smaller tuna caches both  in number and size. Information on species and size composition of tunas is very important. This was done to obtain an overview of long line catch composition and its linear regression. The long liner’s catch data from south of Java in July, September, October 2005 and January 2006 are processed with a simple linear  regression. The result shows that the yellow fin tuna is the dominant catch, where stingrays are the largest in by catch. From length-weight relationship analysis, which is divided into whole length-weight relationship and processed length- weight relationship, it is shown that the growth of big eye tuna is isometric, where albacore and yellow fin is negative allometric.

 

Key words: Albacora, bigeye, Yelowfin, fish weight, fish length


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