Cruise report for the Vaquita Expedition in 2008 conducted aboard NOAA Ship David Starr Jordan, R/V Koipai Yú-Xá and the Vaquita Express

Details

• Personal Author:
  Henry, Annette Elizabeth ; Taylor, Barbara Louise, 1954- ; Rojas-Bracho, Lorenzo ; Rankin, Shannon ; Jaramillo-Legorreta, Armando ; Akamatsu, Tom ; Barlow, Jay ; Gerrodette, Tim ; Hall, Candice ; Jackson, Alan R. (Alan Robert) ; Redfern, Jessica Veneris ; Swift, René ; Tregenza, N. J. C.
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• Corporate Authors:
  Southwest Fisheries Science Center (U.S.)
• NOAA Program & Office:
  NMFS (National Marine Fisheries Service) ; SWFSC (Southwest Fisheries Science Center)
• Description:
  "A small porpoise ( Phocoena sinus ) found only in the upper Gulf of California is called vaquita and is the most endangered species of marine mammal in the world. A rough projection using the last abundance estimate in 1997 and mortality in gillnets resulted in an estimate of only about 150 vaquitas remaining prior to the 2008 survey. With so few vaquitas remaining, the visual and acoustic methods used to monitor trends in vaquita abundance in the past were too imprecise to determine whether the species is continuing to decline. The primary objective of the cruise was to develop the ability to monitor trends in abundance for vaquitas using acoustic monitoring equipment (autonomous devices and towed hydrophones). Autonomous acoustic devices should increase precision because they can record for long periods of time; however, such devices were yet to be tested in the noisy vaquita habitat"--Mission statement.
• Content Notes:
  Annette Henry, Barbara Taylor, Lorenzo Rojas-Bracho, Shannon Rankin, Armando Jaramillo-Legoretta, Tom Akamatsu, Jay Barlow, Tim Gerrodette, Candice Hall, Alan Jackson, Jessica Redfern, Rene Swift and Nick Tregenza. ; "September 2012." ; System requirements: Adobe Acrobat Reader. ; Includes bibliographical references (page 22).
• Series:
  NOAA-TM-NMFS-SWFSC ; 495
• Document Type:
  Technical Memorandum
• Place as Subject:
  Mexico ; California, Gulf of
• Corporate as Subject:
  David Starr Jordan (Ship). ; David Starr Jordan (Ship).
• Rights Information:
  Public Domain
• Compliance:
  Library
• Download URL:
  https://repository.library.noaa.gov/view/noaa/4472/noaa_4472_DS1.pdf
• File Type:
  [PDF - 6.39 MB]
• Collection(s):
  National Marine Fisheries Service (NMFS)
• Main Document Checksum:
  urn:sha-512:1b68ba0fea750b9a66f100407870f17f8480e01a55553104a5b8830d15b168f7cdbeb9f50d4344d2e19006fc0e606207efbab9d826e247f0bd720b74280e607e