AI Article Synopsis
- In 2011, 87 fingerling scombrids were collected from the southern Adriatic Sea, revealing that they included Atlantic bluefin tuna, bullet tuna, and little tunny.
- Mitochondrial DNA sequencing suggested these fish were about 30-40 days old, indicating they may have been spawned in the Adriatic Sea, challenging previous assumptions.
- A modeling study with hydrodynamic and individual-based models indicated that commercial tuna cages in the middle Adriatic could be a potential spawning site for these species.
Article Abstract
During routine monitoring of commercial purse seine catches in 2011, 87 fingerling specimens of scombrids were collected in the southern Adriatic Sea. Sequencing of the mitochondrial DNA control region locus inferred that specimens belonged to the Atlantic bluefin tuna, Thunnus thynnus (Linnaeus, 1758) (N = 29), bullet tuna, Auxis rochei (Risso, 1810) (N = 30) and little tunny, Euthynnus alletteratus, Rafinesque, 1810 (N = 28). According to previously published growth parameters, the age of the collected specimens was estimated at approximately 30-40 days, suggesting they might have been spawned in the Adriatic Sea, contrary to the current knowledge. A coupled modelling system with hydrodynamic (ROMS) and individual based model (IBM-Ichthyop) was set up to determine the location of the spawning event. Numerical simulations with the IBM model, both backward and forward in time, indicate commercial tuna cages in the middle Adriatic coastal area as possible spawning location. The two other non-commercial species likely opportunistically use the positive environmental (abiotic and biotic) conditions to spawn in the same area.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5708836 | PMC |
| http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0188956 | PLOS |
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