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Title Reproductive traits of deep-sea armoured shrimp, Glyphocrangon investigatoris from bay of Bengal, Indian ocean
 
Names Benjamin, D.
Harikrishnan, M.
Rozario, J.
Jose, D.
Kurup, B.
Sreedhar, U.
Cubelio, S.
Date Issued 2019 (iso8601)
Abstract Details on size at first maturity, embryo number and size, brood chamber volume and reproductive output of deep-sea
armoured shrimp, Glyphocrangon investigatoris caught off the south-east coast of India by using EXPO trawl from
633 m depth in FORV ‘Sagar Sampada’ are reported here. Eighty-four female shrimps ranging from 17.29–36.31 mm carapace
length and 2.28–16.54 g weight formed 7.73% of total catch, 30% of which was constituted by embryo-bearing females.
Regression of weight on carapace length revealed negatively allometric growth (r2 ¼ 0.85, P , 0.01). The size at first maturity
was estimated as 19.96 mm. The embryo number ranged from 55 to 233 with a mean of 120.24 +34 embryos and showed a
positive correlation to body size. Embryo diameter varied between 1.0 to 3.34 mm and more than 50% of embryos constituted
the 2.0–2.5 mm size class. Brood chamber volume and percentage frequency of embryo stage development revealed a linear
relationship with carapace length. Based on dry weight, mean reproductive output was estimated to be 0.16. The female
armoured shrimps showed a high reproductive investment evidenced from few, large, yolky embryos, indicating their
deep-sea adaptation.
Genre Article
Identifier J. MAr. Biol. Assoc. UK 99(1):93-100