Assessing trends in abundance for vaquita using acoustic monitoring, within refuge plan and outside refuge research needs : workshop report -- October 19-23, 2009

Rojas-Bracho, Lorenzo; Jaramillo-Legorreta, Armando; Cardenas, Gustavo; Nieto, Edwyna; de Guevara, Paloma Landron; Taylor, Barbara Louise, 1954-; Barlow, Jay; Gerrodette, Tim; Henry, Annette Elizabeth; Tregenza, N. J. C.; Swift, René; Akamatsu, Tom

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Assessing trends in abundance for vaquita using acoustic monitoring, within refuge plan and outside refuge research needs : workshop report -- October 19-23, 2009

2010
By Rojas-Bracho, Lorenzo ; Jaramillo-Legorreta, Armando ; Cardenas, Gustavo ; ...
Series: NOAA-TM-NMFS-SWFSC ; 459

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Rojas-Bracho, Lorenzo ; Jaramillo-Legorreta, Armando ; Cardenas, Gustavo ; Nieto, Edwyna ; de Guevara, Paloma Landron ; ... More +

Rojas-Bracho, Lorenzo ; Jaramillo-Legorreta, Armando ; Cardenas, Gustavo ; Nieto, Edwyna ; de Guevara, Paloma Landron ; Taylor, Barbara Louise, 1954- ; Barlow, Jay ; Gerrodette, Tim ; Henry, Annette Elizabeth ; Tregenza, N. J. C. ; Swift, René ; Akamatsu, Tom Less -
Corporate Authors:

Southwest Fisheries Science Center (U.S.)
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; SWFSC (Southwest Fisheries Science Center)

NMFS (National Marine Fisheries Service) ; SWFSC (Southwest Fisheries Science Center) Less -
Description:

"The vaquita marina (Phocoena sinus) is the most endangered species of marine mammal in the world. It occurs only in the northern Gulf of California, Mexico. The species is endangered due to bycatch in fisheries. The abundance of this species has declined from approximately 570 in 1997 to approximately 150 in 2007. Starting in 2008, the Government of Mexico dedicated an unprecedented level of funding and effort to help reverse this decline. It established a Vaquita Refuge in which vaquitas will be protected from entanglement in fishing nets. The level of fishing effort in other areas where vaquitas are found has been reduced by a combination of economic measures (funding fishing permit holders to retire their permits or to switch to other vaquita-safe fishing methods) and enforcement (to eliminate illegal fishing). It is uncertain whether these measures and future measures will be sufficient to reverse the decline in the vaquita population and to allow it to recover. The purpose of this workshop was to develop a monitoring plan that would allow managers to determine whether the vaquita population is growing or continuing to decline. This report details a monitoring plan within the refuge, but insufficient data were available to complete the design for areas outside the refuge, which still has intense fishing activities that would result in an unknown loss rate of the monitoring devices. Nevertheless, monitoring can begin while data are gathered simultaneously outside the refuge to allow completion of the monitoring system"--Executive Summary (page 4).
Content Notes:

Lorenzo Rojas-Bracho, Armando Jaramillo-Legoretta, Gustavo Cardenas, Edwyna Nieto, Paloma Ladron de Guevara, Barbara Taylor, Jay Barlow, Tim Gerrodette, Annette Henry, Nick Tregenza, Rene Swift, Tomonari Akamatsu.

"May 2010."

Also available in print.

Includes bibliographical references (pages 35).
Keywords:

[+]

Monitoring Phocoena Sinus Population Remote Sensing
Series:

NOAA-TM-NMFS-SWFSC ; 459 ; NOAA technical memorandum NMFS

NOAA-TM-NMFS-SWFSC ; 459 ; NOAA technical memorandum NMFS Less -
Document Type:

Technical Memorandum
Place as Subject:

Mexico ; California, Gulf of

Mexico ; California, Gulf of Less -
Rights Information:

Public Domain
Compliance:

Library
Main Document Checksum:

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urn:sha256:1c0466fa3449f7f8bfec565d7fff738a679cca28cd2746ddf00c07b238fb88d3
Download URL:

https://repository.library.noaa.gov/view/noaa/4737/noaa_4737_DS1.pdf
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Assessing trends in abundance for vaquita using acoustic monitoring, within refuge plan and outside refuge research needs : workshop report -- October 19-23, 2009

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