Non‐lethal assessment of reproductive stage for female blue sharks  Prionace glauca  using sex steroid hormones | Zendy

Fujinami Yuki | Zendy; Semba Yasuko | Zendy

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Non‐lethal assessment of reproductive stage for female blue sharks Prionace glauca using sex steroid hormones

Author(s) -

Fujinami Yuki,

Semba Yasuko

Publication year - 2020

Publication title -

journal of fish biology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.672

H-Index - 115

eISSN - 1095-8649

pISSN - 0022-1112

DOI - 10.1111/jfb.14312

Subject(s) - biology , pregnancy , hormone , endocrinology , medicine , reproduction , juvenile , chondrichthyes , fishery , andrology , ecology , genetics

Plasma concentrations of progesterone (P 4 ) and 17β‐oestradiol (E 2 ) in juvenile, pre‐ovulatory, early, mid‐ or late pregnancy stages of female blue sharks Prionace glauca were analysed. Concentrations of P 4 were significantly higher in pregnant than in non‐pregnant individuals, whereas E 2 concentrations increased with embryonic and follicular development. A highly accurate (86.1%) random forest classification model was developed to predict shark pregnancy. It is proposed that hormone concentrations could be used for the subsequent non‐lethal determination of female P. glauca reproductive state.

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