This report describes the 2020 ICCAT workshop on small tunas biology studies for growth and
reproduction, hosted by the Instituto Español de Oceanografía, 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
