Interplay between hormonal and morphological changes throughout a critical period of larval rearing in the orbicular batfish

Type Article
Date 2020-11
Language English
Author(s) Waqalevu Viliame1, 2, 3, Besson Marc3, 4, Gache Camille3, Roux Natacha3, 5, Fogg Lily6, Bertucci Frédéric7, 8, Metian Marc4, Lafille Marc-Andre9, Maamaatuaiahutapu Moana9, Gasset Eric10, Saulnier Denis11, Laudet Vincent5, Lecchini David3
Affiliation(s) 1 : Laboratory of Larval Rearing Management, United Graduate School of Agricultural Sciences, 8908580, Kagoshima University, Japan
2 : School of Marine Studies, University of the South Pacific, 15387, Suva, Fiji
3 : PSL Research University, EPHE-UPVD-CNRS, USR 3278 CRIOBE BP 1013, 98729, Papetoai, Moorea, French Polynesia
4 : International Atomic Energy Agency - Environment Laboratories, 4a Quai Antoine 1er, Monaco
5 : Observatoire Océanologique de Banyuls-sur-Mer, UMR CNRS 7232 BIOM, Sorbonne Université, 1, avenue Pierre Fabre, 66650, Banyuls-sur-Mer, France
6 : Queensland Brain Institute, University of Queensland, Brisbane, Australia
7 : Unité FRE BOREA, MNHN, CNRS 7208, Sorbonne University, IRD 207, University Caen Normandy, University of French West Indies, Guadeloupe
8 : Laboratoire de Morphologie Fonctionnelle et Evolutive, AFFISH-RC, University of Liège, Belgium
9 : Direction des Ressources Marines, BP 20, Papeete, Tahiti, 98713, French Polynesia
10 : MARBEC, Univ. Montpellier, CNRS, Ifremer, IRD, Palavas, France
11 : Ifremer, UMR 241 EIO, UPF-ILM-IRD, B.P. 49, 98719, Taravao, Tahiti, French Polynesia
Source Aquaculture Reports (2352-5134) (Elsevier BV), 2020-11 , Vol. 18 , P. 100521 (9p.)
DOI 10.1016/j.aqrep.2020.100521
Keyword(s) Larval rearing, Mariculture, Metamorphosis, South pacific countries, Coral reefs
Abstract

Advancement and diversification of the aquaculture industry is reliant on the development of captive breeding and rearing protocols for novel fish species. Orbicular batfish (Platax orbicularis), a major emerging species in Polynesian aquaculture, live in brackish and marine waters around coral reefs, and are highly prized by Pacific Island communities for their high-quality meat. The present study describes the larval growth of P. orbicularis from hatching until 16 days after hatching (DAH) using meristics and thyroid hormone (T3) quantification. Our study highlighted that metamorphosis of P. orbicularis is critical to their production in aquaculture, as found for other species. Levels of the thyroid hormone T3 in P. orbicularis reached a peak at 12 DAH (i.e. hormonal metamorphosis). This peak occurred in concert with important morphological changes and increased mortality and growth between 9 and 12 DAH, clearly illustrating the sensitivity of this fish during metamorphosis. Overall, our study sheds light on the metamorphosis and larval development of a novel aquaculture species, and the interplay between hormonal and morphological changes throughout a critical period of its rearing. These findings may promote the development of protocols for mass-scale production of orbicular batfish in captivity, which may be particularly beneficial to the aquaculture industries of many Pacific Island countries.

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Waqalevu Viliame, Besson Marc, Gache Camille, Roux Natacha, Fogg Lily, Bertucci Frédéric, Metian Marc, Lafille Marc-Andre, Maamaatuaiahutapu Moana, Gasset Eric, Saulnier Denis, Laudet Vincent, Lecchini David (2020). Interplay between hormonal and morphological changes throughout a critical period of larval rearing in the orbicular batfish. Aquaculture Reports, 18, 100521 (9p.). Publisher's official version : https://doi.org/10.1016/j.aqrep.2020.100521 , Open Access version : https://archimer.ifremer.fr/doc/00656/76816/