Population productivity of shovelnose rays: Inferring the potential for recovery

English version

Autoři: Brooke M. D’Alberto ^aff001; John K. Carlson ^aff003; Sebastián A. Pardo ^aff004; Colin A. Simpfendorfer ^aff001
Působiště autorů: Centre for Sustainable Tropical Fisheries and Aquaculture & College of Science and Engineering, James Cook University, Townsville, Queensland, Australia ^aff001; CSIRO Oceans and Atmosphere, Hobart, Tasmania, Australia ^aff002; NOAA/National Marine Fisheries Service–Southeast Fisheries Science Center, Panama City, FL, United States of America ^aff003; Biology Department, Dalhousie University, Halifax, NS, Canada ^aff004
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1371/journal.pone.0225183

Souhrn

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.

Klíčová slova:

Physiological parameters – Death rates – Population growth – Chondrichthyes – Elasmobranchii – Conservation science – Fisheries – International trade

Zdroje

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Population productivity of shovelnose rays: Inferring the potential for recovery

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