Individual Spawning Duration of Captive Atlantic Bluefin Tuna (Thunnus thynnus) Revealed by Mitochondrial DNA Analysis of Eggs
dc.contributor.author
dc.date.accessioned
2019-04-23T08:58:11Z
dc.date.available
2019-04-23T08:58:11Z
dc.date.issued
2015-08-28
dc.identifier.uri
dc.description.abstract
This study presents the first results on Atlantic bluefin tuna (Thunnus thynnus) individual spawning duration and its short-term temporal behavior. The study was based on direct measurements resulting from mtDNA analysis of the offspring of spawners held in transport cages during the 2013 spawning monitoring survey in Balearic waters. The number of females consisted of approximately 259 individuals with an average weight of 186 kg. The survey began on May 22 and ended on July 3. Spawning started on May 30 and was observed every night afterwards. The sampling of eggs for genetic monitoring was conducted for 9 days interspersed from the beginning of spawning to the end of the survey. A total of 946 eggs were analyzed and revealed 129 different haplotypes; 77 of these were not previously detected in the Mediterranean. A total of 69 haplotypes were observed in more than one spawning event and those with higher frequency lasted their maximum possible duration. The haplotypes present at the beginning of spawning were also identified at the end of the sampling, indicating a minimum spawning duration of 34 days, and individual annual fecundity was estimated at around 1290 eggs gr-1. These results differed from those generally presumed until now and are indicative of a much higher fecundity. Females exhibited a regular spawning schedule but with the capacity to shift the spawning hour during the spawning season. These results were observed for the eastern population of Atlantic bluefin tuna and before extrapolating to the western population, their validity should be proved
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Public Library of Science (PLoS)
dc.relation.isformatof
Reproducció digital del document publicat a: https://doi.org/10.1371/journal.pone.0136733
dc.relation.ispartof
PLoS ONE, 2015, vol. 10, núm. 8, p. e0136733
dc.relation.ispartofseries
Articles publicats (D-B)
dc.rights
Attribution 4.0 International
dc.rights.uri
dc.title
Individual Spawning Duration of Captive Atlantic Bluefin Tuna (Thunnus thynnus) Revealed by Mitochondrial DNA Analysis of Eggs
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
023833
dc.type.peerreviewed
peer-reviewed
dc.identifier.eissn
1932-6203