Jump to navigation
Food and Agriculture Organization

User menu

  • Contact us
  • Login

Search form

  • English
  • Français
Indian Ocean Tuna Commission
Indian Ocean Tuna Commission
  • Home
  • The Commission
    • Overview
    • Structure of the Commission
    • Scientific Committee
    • Compliance Committee
    • Standing Committee on Administration and Finance
    • Competence: Area & Species
    • History & Basic texts
    • Conservation and management measures
    • Cooperation with other organisations
    • Capacity building
    • Performance Review
    • The Secretariat
    • Secretariat Staff
    • Allocation Estimations
    • Observers to IOTC meetings
  • Science
    • Overview
    • Scientific Committee
    • Status of the stocks
    • Working Parties: Science
    • Regional Observer Scheme: Science
    • Science: Capacity Building
    • IOTC Science Glossary
    • Invited Experts and Consultants
  • Compliance
    • Overview
    • Capacity building: Compliance
    • Compliance Committee
    • Information for MCS purposes
    • Monitoring of compliance
    • Port State Measures
    • Regional Observer Programme on Transhipments
    • Reporting Templates
    • Statistical document programme
    • StatDoc Validation
    • Vessel records/ IUU Vessels List
  • Data
    • Overview
    • Reporting data to the IOTC
    • Available datasets
    • Reference data catalogue
    • Fisheries identification wizard
    • Interactive data browser
    • Status of reporting of fisheries statistics
    • Capacity building: Data
    • Tagging Data
  • Projects
  • Meetings
  • Documents
  • News
  • Educational Tools

Quick links

  • Home
  • Allocation estimations
  • Capacity building
  • Conservation and management measures
    • Search
  • E-PSM application
    • Request to enter port (AREP)
  • Guide for IOTC data and information reporting
  • IOTC Circulars
  • IOTC Science Glossary
  • IUU Vessel list
  • Interactive data browser
  • Performance Review
  • Statdoc Validation
  • Stock Status Dashboard
  • Vessel records
  • e-MARIS
  • e-RAV

Albacore tuna larval occurrence in the Southwest Indian Ocean and associated species

Reference: 
IOTC-2022-WPTmT08-07
File: 
PDF icon IOTC-2022-WPTmT08-07.pdf
Type: 
Meeting documents
Year: 
2022
Meeting: 
Working Party on Temperate Tuna (WPTmT)
Meeting session: 
802
Availability: 
13 July 2022
Authors: 
Shiroza A
Chevrier T
Brisset B
Chanut J
Derridj O
Evano H
Julien M
Grondin E
Nieblas A-E
Rouyer T
Bernard S
Kerzerho V
Bonhommeau S
Abstract: 

Improving our knowledge about albacore tuna reproduction biology is critical for stock
management for sustainable fisheries of this presumed to be overfished species. While most
of the stock assessment data are from commercial fisheries landed adults, here we present
preliminary results of distribution and abundances of larval Albacore tuna (Thunnus.
albacares) from Southwestern Indian Ocean near Reunion Island. Surface and subsurface
tows were conducted in the spawning habitat of albacore and collected tuna larvae were
quantified, measured, visually identified, and genetically confirmed using multiplex PCR
using primers for six tuna species: kawakawa (Euthynnus affinis), skipjack (Katsuwonus
pelamis), albacore (Thunnus alalunga), yellowfin tuna (Thunnus albacares), bigeye (Thunnus
obesus), and Atlantic bluefin tuna (Thunnus thynnus). Albacore larvae were the most
numerous and most abundant from our collection (N = 214, 68.21% of total tuna density).
Using the reported age-length relationship for T. alalunga from the Mediterranean Sea, our
specimens are estimated to be 0–6 days post hatch. Further early life history research is
needed to determine larval indices to better estimate larval survival and recruitment into
fisheries.

Footer menu

  • Home
  • The Commission
  • Science
  • Compliance
  • Data
  • Projects
  • Meetings
  • Documents
  • News
  • Educational Tools