Population productivity of shovelnose rays: Inferring the potential for recovery

Brooke M. D’Alberto; John K. Carlson; Sebastián A. Pardo; Colin A. Simpfendorfer

doi:10.1371/journal.pone.0225183

Population productivity of shovelnose rays: Inferring the potential for recovery

Brooke M. D’Alberto, John K. Carlson, Sebastián A. Pardo, Colin A. Simpfendorfer

Medicine

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

There is recent evidence of widespread declines of shovelnose ray populations (Order Rhinopristiformes) in heavily fished regions. These declines, which are likely driven by high demand for their fins in Asian markets, raises concern about their risk of over-exploitation and extinction. Using life-history theory and incorporating uncertainty into a modified Euler-Lotka model, the maximum intrinsic rates of population increase (r_max) were estimated for nine species from four families of Rhinopristiformes, using four different natural mortality estimators. Estimates of mean r_max, across the different natural mortality methods, varied from 0.03 to 0.59 year^-1 among the nine species, but generally increased with increasing maximum size. Comparing these estimates to r_max values for other species of chondrichthyans, the species Rhynchobatus australiae, Glaucostegus typus, and Glaucostegus cemiculus were relatively productive, while most species from Rhinobatidae and Trygonorrhinidae had relatively low r_max values. If the demand for their high-value products can be addressed then population recovery for some species is likely possible, but will vary depending on the species.

Original language	English
Article number	e0225183
Journal	PLoS One
Volume	14
Issue number	11
DOIs	https://doi.org/10.1371/journal.pone.0225183
Publication status	Published - Nov 1 2019

Bibliographical note

Funding Information:
This project was funded by the Shark Conservation Fund (Small Grant Program 2018 to BMD), a philanthropic collaborative pooling expertise and resources to meet the threats facing the world’s sharks and rays. The Shark Conservation Fund is a project of Rockefeller Philanthropy Advisors. The corresponding author (BMD) is supported through an Australian Government Research Training Program Scholarship (RTPS). The scientific results and conclusions, as well as any views or opinions expressed herein, are those of the author(s) and do not necessarily reflect those of NOAA or the Department of Commerce. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. The authors would like to thank Charlotte Heacock for assisting in the data collection. This project was funded by the Shark Conservation Fund (BMD), a philanthropic collaborative pooling expertise and resources to meet the threats facing the world’s sharks and rays. The Shark Conservation Fund is a project of Rockefeller Philanthropy Advisors. The corresponding author (BMD) is supported through an Australian Government Research Training Program Scholarship (RTPS). The scientific results and conclusions, as well as any views or opinions expressed herein, are those of the author(s) and do not necessarily reflect those of NOAA or the Department of Commerce. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Publisher Copyright:
Copyright: This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.

ASJC Scopus Subject Areas

General

PubMed: MeSH publication types

Journal Article
Research Support, Non-U.S. Gov't

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title = "Population productivity of shovelnose rays: Inferring the potential for recovery",

abstract = "There is recent evidence of widespread declines of shovelnose ray populations (Order Rhinopristiformes) in heavily fished regions. These declines, which are likely driven by high demand for their fins in Asian markets, raises concern about their risk of over-exploitation and extinction. Using life-history theory and incorporating uncertainty into a modified Euler-Lotka model, the maximum intrinsic rates of population increase (rmax) were estimated for nine species from four families of Rhinopristiformes, using four different natural mortality estimators. Estimates of mean rmax, across the different natural mortality methods, varied from 0.03 to 0.59 year-1 among the nine species, but generally increased with increasing maximum size. Comparing these estimates to rmax values for other species of chondrichthyans, the species Rhynchobatus australiae, Glaucostegus typus, and Glaucostegus cemiculus were relatively productive, while most species from Rhinobatidae and Trygonorrhinidae had relatively low rmax values. If the demand for their high-value products can be addressed then population recovery for some species is likely possible, but will vary depending on the species.",

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note = "Funding Information: This project was funded by the Shark Conservation Fund (Small Grant Program 2018 to BMD), a philanthropic collaborative pooling expertise and resources to meet the threats facing the world{\textquoteright}s sharks and rays. The Shark Conservation Fund is a project of Rockefeller Philanthropy Advisors. The corresponding author (BMD) is supported through an Australian Government Research Training Program Scholarship (RTPS). The scientific results and conclusions, as well as any views or opinions expressed herein, are those of the author(s) and do not necessarily reflect those of NOAA or the Department of Commerce. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. The authors would like to thank Charlotte Heacock for assisting in the data collection. This project was funded by the Shark Conservation Fund (BMD), a philanthropic collaborative pooling expertise and resources to meet the threats facing the world{\textquoteright}s sharks and rays. The Shark Conservation Fund is a project of Rockefeller Philanthropy Advisors. The corresponding author (BMD) is supported through an Australian Government Research Training Program Scholarship (RTPS). The scientific results and conclusions, as well as any views or opinions expressed herein, are those of the author(s) and do not necessarily reflect those of NOAA or the Department of Commerce. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Publisher Copyright: Copyright: This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.",

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Population productivity of shovelnose rays: Inferring the potential for recovery

Abstract

Bibliographical note

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PubMed: MeSH publication types

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