Stepping up to genome scan allows stock differentiation in the worldwide distributed blue shark <i>Prionace glauca</i>

Nikolic, Natacha; Devloo‐Delva, Floriaan; Bailleul, Diane; Noskova, Ekaterina; Rougeux, Clément; Delord, Chrystelle; Borsa, Philippe; Liautard‐Haag, Cathy; Hassan, Mohamad; Marie, Amandine D.; Feutry, Pierre; Grewe, Peter M.; Davies, Campbell R.; Farley, Jessica; Fernando, Daniel; Biton‐Porsmoguer, Sebastian; Poisson, François; Parker, D. Stott; Leone, Agostino; Aulich, Jorden; Lansdell, Matt; Marsac, Francis; Arnaud‐Haond, Sophie

doi:10.1111/mec.16822

Cited by 17 publications

(8 citation statements)

References 100 publications

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“…In stark contrast to the patterns observed in M. alfredi , M. birostris displayed markedly higher levels of heterozygosity and only subtle genetic differentiation across ocean basins. Weak population structure is common in highly mobile marine species (Leslie & Morin, 2018; Nikolic et al, 2023; Vignaud et al, 2014), yet warrants careful interpretation, particularly considering management recommendations (Younger et al, 2017). On the one hand, these findings may be an indication of high contemporary gene flow and low natal philopatry, in line with the species’ occurrence at remote oceanic islands, tendency to range into sub-tropical habitats and lower overall re-sight rates than M. alfredi (Couturier et al, 2014; Harty et al, 2022; Rambahiniarison et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

Comparative population genomics of manta rays has global implications for management

Humble

Hosegood

Carvalho

et al. 2023

Preprint

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Understanding population connectivity and genetic diversity is of fundamental importance to conservation. However, in globally threatened marine megafauna, challenges remain due to their elusive nature and wide-ranging distributions. As overexploitation continues to threaten biodiversity across the globe, such knowledge gaps compromise both the suitability and effectiveness of management actions. Here, we use a comparative framework to investigate genetic differentiation and diversity of manta rays, one of the most iconic yet vulnerable groups of elasmobranchs on the planet. Despite their recent divergence, we show how oceanic manta rays(Mobula birostris)display significantly higher genetic diversity than reef manta rays(Mobula alfredi)and thatM. birostrispopulations display higher connectivity worldwide. Through reconstructing modes of colonisation, we reveal how both contemporary and historical forces have likely influenced these patterns, with important implications for population management. Our findings highlight the potential for fisheries to disrupt population dynamics at both local and global scales and therefore have direct relevance for international marine conservation.TeaserPopulation genomics of manta rays reveals striking differences in differentiation and diversity between two recently diverged species.

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Section: Discussionmentioning

confidence: 99%

Comparative population genomics of manta rays has global implications for management

Humble

Hosegood

Carvalho

et al. 2023

Preprint

Self Cite

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“…The blue shark Prionace glauca was thought to have a panmictic world-wide population. The genome scan (RAD-DArT sequencing) enabled the discovery of over 37,000 SNPs [ 211 ]. Their genotyping showed a differentiation between the Northern (Mediterranean, northern Atlantic) and Southern populations (the Indo-West Pacific).…”

Section: Selection and Adaptation Of Aquatic Populations To Environme...mentioning

confidence: 99%

Single Nucleotide Polymorphism Markers with Applications in Conservation and Exploitation of Aquatic Natural Populations

Wenne

2023

Animals

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An increasing number of aquatic species have been studied for genetic polymorphism, which extends the knowledge on their natural populations. One type of high-resolution molecular marker suitable for studying the genetic diversity of large numbers of individuals is single nucleotide polymorphism (SNP). This review is an attempt to show the range of applications of SNPs in studies of natural populations of aquatic animals. In recent years, SNPs have been used in the genetic analysis of wild and enhanced fish and invertebrate populations in natural habitats, exploited migratory species in the oceans, migratory anadromous and freshwater fish and demersal species. SNPs have been used for the identification of species and their hybrids in natural environments, to study the genetic consequences of restocking for conservation purposes and the negative effects on natural populations of fish accidentally escaping from culture. SNPs are very useful for identifying genomic regions correlated with phenotypic variants relevant for wildlife protection, management and aquaculture. Experimental size-selective catches of populations created in tanks have caused evolutionary changes in life cycles of fishes. The research results have been discussed to clarify whether the fish populations in natural conditions can undergo changes due to selective harvesting targeting the fastest-growing fishes.

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“…Similarly, evidence based on molecular data showed how biotic and abiotic features such as bathymetry, hydrological constraints, and prey abundance can influence the presence, movement, and dispersion of sharks and rays (Catarino et al, 2015;Di Crescenzo et al, 2022). The continued evolution and development of new and more resolutive techniques are allowing the possibility to deeply understand the biology and ecology of marine species, such as P. glauca for which only recently the absence of panmixia worldwide was observed (Nikolic et al, 2023). On the other hand, the presence of juveniles and newborns of different species in the study area can be linked to its high environmental value and the peculiar hydrological condition.…”

Section: Final Considerations and Future Research Prospectsmentioning

confidence: 99%

Looking into the prevalence of bycatch juveniles of critically endangered elasmobranchs: a case study from pelagic longline and trammel net fisheries of the Asinara Gulf (western Mediterranean)

Scacco,

Gennari,

Di Crescenzo

et al. 2023

Front. Mar. Sci.

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Bycatch of cartilaginous species is considered one of the main drivers for the dramatic declines observed in many populations. Pelagic longlines and passive nets impact many species depending on their life stage and habitat use. Here, we present an updated list of incidental catches collected through a 4-year fishery-dependent survey. We documented the bycatch of four critically endangered species, particularly 13 individuals of Isurus oxyrinchus, Prionace glauca, and Mobula mobular by longlines and one specimen of Lamna nasus by trammel nets in the Asinara Gulf (Northern Sardinia, Italy). As almost all specimens were juveniles or newborns, we explored and discussed the potential drivers explaining their prevalence in the sample. Despite our low sample size, of the four possible options discussed, the role of the Asinara Gulf as an Important Shark and Ray Area (ISRA) for large pelagic elasmobranch species is one worth considering.

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Stepping up to genome scan allows stock differentiation in the worldwide distributed blue shark Prionace glauca

Cited by 17 publications

References 100 publications

Comparative population genomics of manta rays has global implications for management

Comparative population genomics of manta rays has global implications for management

Single Nucleotide Polymorphism Markers with Applications in Conservation and Exploitation of Aquatic Natural Populations

Looking into the prevalence of bycatch juveniles of critically endangered elasmobranchs: a case study from pelagic longline and trammel net fisheries of the Asinara Gulf (western Mediterranean)

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