| Autor: |
Žuvić, Luka, Talijančić, Igor, Šegvić-Bubić, Tanja, Žužul, Iva, Grubišić, Leon, Lepen Pleić, Ivana, Bušelić Garber, Ivana, Hrabar, Jerko |
| Přispěvatelé: |
Filić, Želimir |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Popis: |
Bullet tuna (BLT) Auxis rochei, Little tunny (LTA) Euthynnus alletteratus, and Atlantic bluefin tuna (BFT) Thunnus thynnus are among the most important marine predators and are important target species for commercial and recreational fisheries. BFT is also important for aquaculture in Croatia, where 85% of the commercial catch is destined for aquaculture. Since morphological identification of juvenile scombrids is often difficult, the aim of the study was to identify the most important characteristics for species separation using geometric morphometrics and molecular approaches. Juveniles were collected from recreational fisheries in the central and southern parts of the eastern Adriatic during 2019-20. Landmark-based geometric morphometrics (GM) was applied to analyse body shape using digital fish images, with the final configuration of 17 fixed landmarks subsequently used to analyze variation among groups. A partial fragment of the mtDNA control region was amplified using primers specific to the family Scombridae on 10 individuals/species. Phylogenetic reconstruction revealed the presence of three distinct clades corresponding to the presence of these three Scombridae species. The results of GM analysis showed that the main differences between the species are visible in body width and head shape, which allowed the individuals to be assigned to their origin with high accuracy. In conclusion, both methodological approaches proved useful in species identification and can be applied in fisheries management, which is particularly important for BFT as a controlled fishery species. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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