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Vaquita Face Extinction from Bycatch. Comment on Manjarrez-Bringas, N. et al., Lessons for Sustainable Development: Marine Mammal Conservation Policies and Its Social and Economic Effects. Sustainability 2018, 10, 2185

Author

Listed:
  • Karl W. Flessa

    (Department of Geosciences, University of Arizona, Tucson, AZ 85721, USA)

  • Luis Calderon-Aguilera

    (Departamento de Ecología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Baja California 22860, Mexico)

  • Carlos E. Cintra-Buenrostro

    (School of Earth, Environmental, and Marine Sciences, University of Texas Rio Grande Valley, Brownsville, TX 78520, USA)

  • David L. Dettman

    (Department of Geosciences, University of Arizona, Tucson, AZ 85721, USA)

  • Gregory P. Dietl

    (Paleontological Research Institution, Ithaca, New York, NY 14850, USA
    Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, New York, NY 14853, USA)

  • David H. Goodwin

    (Department of Geosciences, Denison University, Granville, OH 43023, USA)

  • David K. Jacobs

    (Department of Ecology and Evolutionary Biology, University of California Los Angeles, Los Angeles, CA 90095, USA)

  • Michal Kowalewski

    (Florida Museum of Natural History, University of Florida, Gainesville, FL 32611, USA)

  • Steven M. Nelson

    (6101 NW 102nd Ave Apt 5, Vancouver, WA 98662, USA)

  • Kirsten Rowell

    (Environmental Studies, University of Colorado, Boulder, CO 80309, USA)

  • Bernd R. Schöne

    (Institute für Geowissenschaften, Johannes Gutenberg-Universität Mainz, D-55128 Mainz, Germany)

  • Jansen A. Smith

    (Paleontological Research Institution, Ithaca, New York, NY 14850, USA)

  • Francisco Zamora-Arroyo

    (Sonoran Institute, 100 N. Stone Ave., Suite 400, Tucson, AZ 85701, USA)

Abstract

We are among the scientists who have documented the environmental and ecological changes to the Upper Gulf of California following the reduction in the Colorado River’s flow. We object to any suggestion that our research supports Manjarrez-Bringas et al.’s conclusion that the decline in the Colorado River’s flow is the reason for the decline in the population of the endangered vaquita porpoise ( Phocoena sinus ). Manjarrez-Bringas et al.’s conclusions are incongruent with their own data, their logic is untenable, their analyses fail to consider current illegal fishing practices, and their recommendations are unjustified and misdirected. Vaquita face extinction because of bycatch, not because of the lack of river flow.

Suggested Citation

  • Karl W. Flessa & Luis Calderon-Aguilera & Carlos E. Cintra-Buenrostro & David L. Dettman & Gregory P. Dietl & David H. Goodwin & David K. Jacobs & Michal Kowalewski & Steven M. Nelson & Kirsten Rowell, 2019. "Vaquita Face Extinction from Bycatch. Comment on Manjarrez-Bringas, N. et al., Lessons for Sustainable Development: Marine Mammal Conservation Policies and Its Social and Economic Effects. Sustainabil," Sustainability, MDPI, vol. 11(7), pages 1-6, April.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:7:p:2161-:d:221789
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    References listed on IDEAS

    as
    1. Nahieli Manjarrez-Bringas & Eugenio Alberto Aragón-Noriega & Luis Felipe Beltrán-Morales & Michael Victor Cordoba-Matson & Alfredo Ortega-Rubio, 2018. "Lessons for Sustainable Development: Marine Mammal Conservation Policies and Its Social and Economic Effects," Sustainability, MDPI, vol. 10(7), pages 1-13, June.
    2. Andrew Frederick Johnson & Marcia Moreno-Báez & Alfredo Giron-Nava & Julia Corominas & Brad Erisman & Exequiel Ezcurra & Octavio Aburto-Oropeza, 2017. "A spatial method to calculate small-scale fisheries effort in data poor scenarios," PLOS ONE, Public Library of Science, vol. 12(4), pages 1-17, April.
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