SEX DISCRIMINATION BASED ON MORPHOLOGICAL TRAITS IN SQUARETAIL MULLET Ellochelon vaigiensis (QUOY & GAIMARD, 1825)

Nguyễn Duy Linh; Nguyễn Hữu Đức Tôn; Đinh Minh Quang

doi:10.34238/tnu-jst.5542

SEX DISCRIMINATION BASED ON MORPHOLOGICAL TRAITS IN SQUARETAIL MULLET Ellochelon vaigiensis (QUOY & GAIMARD, 1825)

About this article

Received: 14/02/22 Revised: 18/04/22 Published: 18/04/22

Authors

1. Nguyen Duy Linh, Can Tho University; Tan Long High School – Hau Giang
2. Nguyen Huu Duc Ton, Can Tho University
3. Dinh Minh Quang , Can Tho University

Abstract

This study contributes a method in order to determine fish sex using the regression of some morphological measurements of squaretail mullet Ellochelon vaigiensis (Quoy & Gaimard, 1825). A total of 656 fish samples were collected by trawl nets at four coastal sites from Ben Tre to Tra Vinh, Soc Trang and Bac Lieu during a period of 10 months from March to October 2021. After collection, fish samples were transferred to the laboratory to measure the total length (TL), standard length (SL), body height (BH) and head length (HL) before surgery to determine the fish sex based on gonads. The results of regression analysis of TL-SL, TL-BH and TL-HL showed that BH and HL could be used to determine the sex of this fish as BH, and HL of females increased dominantly than males. In addition, SL, BH and HL could be used to estimate when fish was caught (e.g., the dry or wet season).

Keywords

Ellochelon vaigiensis; Fish body height; Fish head length; Mekong Delta; Squaretail mullet

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DOI: https://doi.org/10.34238/tnu-jst.5542

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