The Use of Morphological Measurement Relationships on Sex Differentiation for Polynemus melanochir in Cai Rang - Can Tho and Long Phu - Soc Trang

Abstract

This research examines sex differentiation in Polynemus melanochir through morphometric analyses conducted across two sites in the Mekong Delta: Cai Rang and Long Phu. Over ten months, 520 samples were analyzed for standard length, head length, and body height metrics. Findings indicated that males generally maintain positive or stable relationships between total length and body measurements, while females often exhibit negative growth trends. Seasonal and locational effects were also noted, with the wet season favoring growth. These non-invasive morphometric techniques offer a practical approach to sex differentiation, aiding conservation efforts and enhancing understanding of Polynemus melanochir biology in varying environmental contexts.