Biometric data for large pelagic fish in the Indian Ocean

Date 2019-10-02
Temporal extent 2017-06-26 -2019-08-08
Author(s) Bonhommeau SylvainORCID1, Evano Hugues1, Huet Jerome2, Chapat Melodie1, Varenne Fanchon1, Le Foulgoc Loic3, Richard Emilie4, Tessier Emmanuel1, Chanut Jérémie6, Nieblas Anne Elise6, Brisset Blandine1
Affiliation(s) 1 : Ifremer, DOI, rue Jean Bertho, BP80, 97822 Le Port CEDEX, La Réunion
2 : Ifremer, Centre Bretagne - ZI de la Pointe du Diable - CS 10070 - 29280 Plouzané
3 : Armement Enez
4 : Caprun
5 : Campus IRD - 101 Promenade Roger Laroque - BP 32078 - 98897 Nouméa Cedex - Nouvelle-Calédonie
DOI 10.17882/62757
Publisher SEANOE
Keyword(s) biometry, large pelagic, indian ocean, length, weight, gutted, gilled, headed

Biometric relationships are critical to convert measurement performed at landings (fish with head, tail cut or gutted and gilled) to standardized measurements which can be used in stock assessment and scientific purposes. In the Indian Ocean, while tuna species are relatively well described, there is a critical lack of information for billfish and the interannual and seasonal variations of these relationships are rarely investigated. To cope with this issue, the relationships used at IOTC are coming from other oceans or close species which is not scientifically satisfactory. In this document, we present the biometric relationships for 6 large pelagic species over 267 individuals in 2017 and 2018 from catches of Reunionese longliners. The classical length and weights are established for this species. While the relationships are very neat, further collections are needed to provide robust relationship. This document question our ability to share and build a global biological database at IOTC which can be regularly updated and provided the best scientific knowledge for these relationship. These data could be also used for other scientific needs and could be easily freely accessible as they are not sensitive.

Licence CC0
File Size Format Processing Access
Measurements done on large pelagics (csv file) 94 KB CSV Raw data Open access
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How to cite 

Bonhommeau Sylvain, Evano Hugues, Huet Jerome, Chapat Melodie, Varenne Fanchon, Le Foulgoc Loic, Richard Emilie, Tessier Emmanuel, Chanut Jérémie, Nieblas Anne Elise, Brisset Blandine (2019). Biometric data for large pelagic fish in the Indian Ocean. SEANOE.