Disparate past demographic histories of three small Scombridae (Actinopterygii) species in Tunisian waters

Allaya, Hassen; Faleh, Abderraouf Ben; Hattour, Abdallah; Trabelsi, Monia; Viñas, Jordi

doi:10.1007/s10750-015-2261-x

Cited by 4 publications

(8 citation statements)

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“…HKY ? G was selected as the best nucleotide substitution model (see below) and the mutation rate was fixed at 4.9 9 10 -8 substitutions/site/year (Alvarado Bremer et al, 2005;Allaya et al, 2015). Chain length of 50 9 10 6 , sampling every 1.000 generations, when needed, two runs were combined.…”

Section: Genetic Population Analysesmentioning

confidence: 99%

“…No genetic evidences of population structure have been found in E. affinis among Indian locations (Kumar et al, 2012). Similarly, for E. alletteratus no genetic differentiation was detected within the Mediterranean (Allaya et al, 2015), nor between east and west Atlantic (Ward, 1995). However, preliminary results based on mtDNA (Alvarado Bremer & Ely, 1999) and on plastic and meristic characters (Gaykov & Bokhanov, 2008) suggests the presence of two stocks within the Atlantic Ocean.…”

Section: Introductionmentioning

confidence: 98%

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Population genetics meets phylogenetics: new insights into the relationships among members of the genus Euthynnus (family Scombridae)

et al. 2021

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Euthynnus (family Scombridae) is a genus of marine pelagic fish species with a worldwide distribution that comprises three allopatric species: E. alletteratus, E. affinis and E. lineatus. All of them targeted by artisanal and commercial fisheries. We analyzed 263 individuals from Atlantic and Pacific Oceans using two genetic markers, the mtDNA Control Region (350 bp) and nuclear calmodulin (341 bp). The results obtained challenge the phylogeny of this group. We found a deep genetic divergence, probably at species level, within E. alletteratus, between the North Atlantic-Mediterranean and the Tropical East Atlantic. This deep genetic divergence was tested with several species delimitation methods. This complete phylogeographic association between the North Atlantic and the Tropical East Atlantic support the hypothesis of two cryptic species. In addition, population genetic heterogeneity was detected between the North East Atlantic–Mediterranean and North West Atlantic regions. Our results indicate two scales of differentiation in what is currently considered a single population. Accordingly, for management purposes, the populations of E. alletteratus, should be divided into a minimum of three management units. On the other hand, the high level of differentiation found in E. alletteratus contrasts with the shallow genetic divergence of E. affinis and E. lineatus.

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Section: Genetic Population Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Population genetics meets phylogenetics: new insights into the relationships among members of the genus Euthynnus (family Scombridae)

et al. 2021

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“…Moreover, molecular entries associated with outdated taxonomic nomenclature still available in public repositories, could generate doubtful identification. For instance, in our study, the identification Haplotype D-loop 2 shows the best hits with 100% of similarity with S. colias, but also includes a hit using the old taxonomic nomenclature as S. japonicus (KJ578977.1) (Allaya et al, 2015). However, such a molecular sequence was generated from a specimen collected in Tunisia (Mediterranean Sea), an area recognised as being inhabited only by S. colias.…”

Section: Discussionmentioning

confidence: 87%

Species authentication of canned mackerel: Challenges in molecular identification and potential drivers of mislabelling

et al. 2022

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“…For the mitochondrial DNA Control Region marker (mtDNA CR), database was created merging haplotypes from previous studies that are available in GenBank (www.ncbi. nlm.nih.gov/genbank, accessed on 22 January 2019) under accession numbers KJ573169-KJ573276 [29], MK159428-MK159691 and MH513321-MH513323 [30]. Additionally, a collection of 41 new sequences was added to the dataset and is available online under accession numbers MW574141-MW574181.…”

Section: Methodsmentioning

confidence: 99%

“…Unfortunately, the conclusions reported in this study give rise to some concern because of the contradictory results between mtDNA and microsatellite markers and the scarceness in describing the statistical analysis and results. In a local study using the mtDNA CR marker, no genetic heterogeneity was found between bullet tuna surrounding the Strait of Sicily [29]. Despite these preliminary attempts to understand the stock structure of this species in the Mediterranean, the population structure of bullet tuna in this region is still poorly understood.…”

Section: Introductionmentioning

confidence: 99%

Larval Retention and Homing Behaviour Shape the Genetic Structure of the Bullet Tuna (Auxis rochei) in the Mediterranean Sea

Ollé-Vilanova

Pérez-Bielsa

Araguas

et al. 2022

Fishes

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Background: The bullet tuna (Auxis rochei) is an epipelagic fish with a worldwide distribution that is highly targeted by fisheries. Genetic diversity and population genetics are good indicators of population structure and thus, essential tools for fisheries management. Knowing which factors (biotic and abiotic) might be shaping such structure is crucial for management plans. In the present study, we assessed the population structure of the bullet tuna in the western and central Mediterranean Sea. Methods: We used two types of genetic data: the mitochondrial DNA control region and seven microsatellite loci. The analysis of 431 sequences with a length of 386 bp from the mtDNA CR and the results from 276 individuals were genotyped by seven microsatellite loci. Results: Both types of markers coincided in showing significant genetic differences between an Iberian Peninsula–Strait of Gibraltar stock in comparison with a North African stock. Conclusions: We argue that this differentiation pattern is likely caused by reproductive strategies such as coastal spawning, larval retention, and natal homing behavior. These results should endorse the implementation of management plans for a resource that currently is not being managed. Thus, to ensure sustainability, these new policies should consider the presence of at least two genetically identified stocks.

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Disparate past demographic histories of three small Scombridae (Actinopterygii) species in Tunisian waters

Cited by 4 publications

References 57 publications

Population genetics meets phylogenetics: new insights into the relationships among members of the genus Euthynnus (family Scombridae)

Population genetics meets phylogenetics: new insights into the relationships among members of the genus Euthynnus (family Scombridae)

Species authentication of canned mackerel: Challenges in molecular identification and potential drivers of mislabelling

Larval Retention and Homing Behaviour Shape the Genetic Structure of the Bullet Tuna (Auxis rochei) in the Mediterranean Sea

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