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Rapid assessment of adult abundance and demographic connectivity from juvenile kin pairs in a critically endangered species

The viability of spatially structured populations depends on the abundance and connectivity between subpopulations of breeding adults. Yet, for many species, both are extremely difficult to assess. The speartooth shark is a critically endangered elasmobranch inhabiting tropical rivers with only thre...

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Autores principales: Patterson, Toby A., Hillary, Richard M., Kyne, Peter M., Pillans, Richard D., Gunasekera, Rasanthi M., Marthick, James R., Johnson, Grant J., Feutry, Pierre
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9770943/
https://www.ncbi.nlm.nih.gov/pubmed/36542711
http://dx.doi.org/10.1126/sciadv.add1679
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author Patterson, Toby A.
Hillary, Richard M.
Kyne, Peter M.
Pillans, Richard D.
Gunasekera, Rasanthi M.
Marthick, James R.
Johnson, Grant J.
Feutry, Pierre
author_facet Patterson, Toby A.
Hillary, Richard M.
Kyne, Peter M.
Pillans, Richard D.
Gunasekera, Rasanthi M.
Marthick, James R.
Johnson, Grant J.
Feutry, Pierre
author_sort Patterson, Toby A.
collection PubMed
description The viability of spatially structured populations depends on the abundance and connectivity between subpopulations of breeding adults. Yet, for many species, both are extremely difficult to assess. The speartooth shark is a critically endangered elasmobranch inhabiting tropical rivers with only three adults ever recorded in Australia. Close-kin mark-recapture models, informed by sibling pairs among 226 juveniles, were developed to estimate adult abundance and connectivity in two Australian river systems. Sixty-eight sibling pairs were found, and adult abundance was estimated at 892 for the Adelaide River and 1128 for the Alligator Rivers. We found strong evidence for female philopatry, with most females returning to the same river to pup. Adelaide River males appear largely philopatric, whereas Alligator Rivers males are highly connected to the Adelaide River. From only 4 years of sampling, our results demonstrate that juvenile-only kin pairs can inform simultaneous estimates of abundance and connectivity in a rare and threatened species.
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spelling pubmed-97709432022-12-28 Rapid assessment of adult abundance and demographic connectivity from juvenile kin pairs in a critically endangered species Patterson, Toby A. Hillary, Richard M. Kyne, Peter M. Pillans, Richard D. Gunasekera, Rasanthi M. Marthick, James R. Johnson, Grant J. Feutry, Pierre Sci Adv Earth, Environmental, Ecological, and Space Sciences The viability of spatially structured populations depends on the abundance and connectivity between subpopulations of breeding adults. Yet, for many species, both are extremely difficult to assess. The speartooth shark is a critically endangered elasmobranch inhabiting tropical rivers with only three adults ever recorded in Australia. Close-kin mark-recapture models, informed by sibling pairs among 226 juveniles, were developed to estimate adult abundance and connectivity in two Australian river systems. Sixty-eight sibling pairs were found, and adult abundance was estimated at 892 for the Adelaide River and 1128 for the Alligator Rivers. We found strong evidence for female philopatry, with most females returning to the same river to pup. Adelaide River males appear largely philopatric, whereas Alligator Rivers males are highly connected to the Adelaide River. From only 4 years of sampling, our results demonstrate that juvenile-only kin pairs can inform simultaneous estimates of abundance and connectivity in a rare and threatened species. American Association for the Advancement of Science 2022-12-21 /pmc/articles/PMC9770943/ /pubmed/36542711 http://dx.doi.org/10.1126/sciadv.add1679 Text en Copyright © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Earth, Environmental, Ecological, and Space Sciences
Patterson, Toby A.
Hillary, Richard M.
Kyne, Peter M.
Pillans, Richard D.
Gunasekera, Rasanthi M.
Marthick, James R.
Johnson, Grant J.
Feutry, Pierre
Rapid assessment of adult abundance and demographic connectivity from juvenile kin pairs in a critically endangered species
title Rapid assessment of adult abundance and demographic connectivity from juvenile kin pairs in a critically endangered species
title_full Rapid assessment of adult abundance and demographic connectivity from juvenile kin pairs in a critically endangered species
title_fullStr Rapid assessment of adult abundance and demographic connectivity from juvenile kin pairs in a critically endangered species
title_full_unstemmed Rapid assessment of adult abundance and demographic connectivity from juvenile kin pairs in a critically endangered species
title_short Rapid assessment of adult abundance and demographic connectivity from juvenile kin pairs in a critically endangered species
title_sort rapid assessment of adult abundance and demographic connectivity from juvenile kin pairs in a critically endangered species
topic Earth, Environmental, Ecological, and Space Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9770943/
https://www.ncbi.nlm.nih.gov/pubmed/36542711
http://dx.doi.org/10.1126/sciadv.add1679
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