Abstract

Four embryonic bigeye thresher sharks Alopias superciliosus (126–158 cm total length) were collected from two females caught by bottom set gillnet and hook and line (operating in 120–800 m depth) caught from off Kanyakumari area and landed in Cochin Fisheries Harbour on 11-06-2012 . Detailed morphometric measurements are provided. The ratio of size at birth (Lb) and maximum observed length (L max ) in this study was 0.36, the largest when compared to earlier reports available till date. The bigeye thresher shark (Alopias superciliosus) is listed as Vulnerable globally because of declining population (IUCN 2007, Amorim et al. 2009). The production of a large neonate at parturition has the advantage of

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