3 research outputs found
Population genetic of Atlantic bonito in the north east Atlantic and Mediterranean
This study assesses the stock structure of Atlantic bonito (Sarda sarda) using the mitochondrial
control region as a genetic marker. About 615 individuals distributed in seven locations were
analyzed. Two of the locations were in the Mediterranean Sea (MD/BIL95) (Spain and Tunis),
three in the northeast Atlantic (AT-NE/BIL94B) (Portugal, Tunis, Morocco and Mauritania), and
one in the southeast Atlantic (AT-SE/BIL97) (Côte d’Ivoire). All these samples were obtained
thanks to the participation of all authors in two Small Tuna Research Programs funded by
ICCAT. The analysis of the genetic variability of the sequence of mitochondrial control regions
depicts a clear heterogeneity among locations. The shared genetic pool that comprises the
locations within the Mediterranean (Spain and Tunis), including also a sample from the northeast
Atlantic (Portugal), is clearly different from the African locations (Senegal and Côte d’Ivoire).
Moreover, these two African locations are also genetically differentiated between them. Morocco
and Mauritania locations seems to be located in an intermediate situation between these two
groups of locations. These results can be used to infer a management policy by ICCAT on the
fisheries of this specie
Final report of the short-term contract for ICCAT SMYTP for the biological samples collection for growth, maturity and genetics studies – Year #2
This document is the final report of the second year of the short-term contract of the Small Tuna
Year Program by ICCAT. In 2018, the Small Tuna Species Group decided to prioritize Little
tunny (LTA) (Euthynnus alletteratus) Atlantic bonito (BON) (Sarda sarda) and Wahoo (WAH)
(Acanthocybium solandri), based on their economic importance and the deficiency of knowledge
of their biology. The objectives of the contract for three species were: i) Collect biological
samples for estimating growth parameters, assessing the maturity and stock structure analysis
(populations genetics), and ii) Conclude the analysis of the stock structure for at least one of the
three species and provide preliminary results for the remaining. The obtained samples for
growth, maturity and stock structure analysis was almost completed for Little tunny and Atlantic
bonito, whereas for Wahoo the samples are scarce. The analysis of stock structure for Little tunny
and Atlantic bonito revealed that the observed dif
Report on the 2020 ICCAT workshop on small tunas biology studies for growth and reproduction
This report describes the 2020 ICCAT workshop on small tunas biology studies for growth and
reproduction, hosted by the Instituto Español de OceanografĂa, Málaga, Spain. The major
objectives of the workshop were: 1) starting the creation of ageing and reproduction reference
sets and, 2) providing more training for the ongoing sample collection and processing to the
teams involved in these studies. As approved by the SCRS in 2017, the Small Tuna Species
Group intersessional meeting decided to prioritize the collection of biological samples aiming
at growth, maturity and stock structure studies on three species: little tunny (Euthynnus
alletteratus), Atlantic Bonito (Sarda sarda) and wahoo (Acanthocybium solandri), based on
their economic importance and the lack of knowledge on their biology. This work will
contribute to the next major advance in the assessment of these three species