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  • Mgeleka, Said S. S.Stockholm University, Sweden; Tanzania Fisheries Research Institute, Tanzania (författare)

Population genetics of the hound needlefish Tylosurus crocodilus (Belonidae) indicate high connectivity in Tanzanian coastal waters

  • Artikel/kapitelEngelska2023

Förlag, utgivningsår, omfång ...

  • Taylor & Francis,2023
  • electronicrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:sh-52148
  • https://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-52148URI
  • https://doi.org/10.1080/17451000.2023.2224026DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • The hound needlefish Tylosurus crocodilus (Belonidae) is a highly demanded fish in the local markets of Tanzania, but the growing coastal population threatens its sustainability. As belonids are highly migratory fishes utilising various parts of the seascape, increased fishing pressure may disrupt connectivity patterns on different spatiotemporal scales and disaggregate populations. Using the COI gene, this study assessed the genetic population structure, connectivity patterns, and historical demography of T. crocodilus collected in seven sites spread along Tanzanian coastal waters. Results showed fourteen haplotypes with low overall nucleotide and haplotype diversity. Pairwise F-ST comparisons revealed no significant differences among the sampled sites, except for the northernmost site (Tanga) and an island in the south (Songosongo). Analysis of molecular variance (AMOVA) revealed a non-significant genetic structure among populations (F-ST = 0.01782), suggesting the fishery across Tanzanian waters exploits the same population. Moreover, there was no correlative relationship between genetic and pairwise geographic distances, rejecting the isolation by distance hypothesis. However, neutrality tests and mismatch distribution analysis revealed that recent demographic expansion might exist. Empirical evidence of panmixia suggests high genetic connectivity. In combination with low genetic diversity, management should be directed to actions that prevent genetic diversity loss and the effect of genetic drift on populations.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Silas, Mathew OgaloTanzania Fisheries Research Institute, Tanzania (författare)
  • Mtonga, CretusThe Nelson Mandela African Institution of Science and Technology, Tanzania; The Leibniz Centre for Tropical Marine Research (ZMT), Germany (författare)
  • Rumisha, CyrusSokoine University of Agriculture, Tanzania (författare)
  • Viinamaki, ElinaStockholm University, Sweden (författare)
  • Polte, PatrickInstitute of Baltic Sea Fisheries, Rostock, Germany (författare)
  • Sköld, MattiasSwedish University of Agricultural Sciences, Sweden (författare)
  • Winder, MonikaStockholm University, Sweden (författare)
  • Gullström, MartinSödertörns högskola,Miljövetenskap(Swepub:sh)magx20 (författare)
  • Stockholm University, Sweden; Tanzania Fisheries Research Institute, TanzaniaTanzania Fisheries Research Institute, Tanzania (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Marine Biology Research: Taylor & Francis19:4-5, s. 261-2701745-10001745-1019

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