Stress response and post-release mortality of blacktip sharks (carcharhinus limbatus) captured in shore-based and charter boat-based recreational fisheries

Details

• Journal Title:
  Fishery Bulletin
• Personal Author:
  Weber, D. Nick ; Frazier, Bryan S. ; Whitney, Nicholas M. ; Gelsleichter, James ; Sancho, Gorka
• NOAA Program & Office:
  CPO (Climate Program Office) ; OAR (Oceanic and Atmospheric Research)
• Description:
  In the coastal waters of the ; southeastern United States, the blacktip shark (Carcharhinus limbatus) is ; targeted by recreational anglers and ; is currently one of the most often ; captured large coastal shark species. ; We estimated postrelease mortality ; (PRM) rates for blacktip sharks captured on rod and reel by shore-based ; and charter-boat-based fishermen by ; using acoustic transmitters (number ; of sharks=81). Additionally, 24 blacktip sharks were tagged with pop-off ; satellite archival tags (PSATs) to validate the survivorship obtained through ; analysis of data from the acoustic transmitters. The stress response associated ; with both recreational capture methods was quantified by using numerous blood chemistry characteristics. ; Overall, 18.5% of blacktip sharks died ; postrelease (17.1% and 20.0% of those ; captured from shore and from charter ; boats, respectively). The results of survivorship analysis based on data from ; transmitters are consistent with results ; inferred from data from PSATs, supporting our use of acoustic transmitters ; to assess PRM in blacktip sharks. Fight ; time had a significant effect on blood ; pH, lactate, hematocrit, potassium, and ; glucose for sharks caught from shore ; but only on lactate for sharks caught ; from charter boats. In general, the blood ; chemistry characteristics assessed were ; poor predictors of PRM. Fifty percent of ; foul-hooked sharks (i.e., sharks hooked ; anywhere but the jaw) died postrelease, ; indicating the importance of the effect ; of hook placement on PRM.
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• Source:
  Fishery Bulletin, 118(3)
• DOI:
  https://doi.org/10.7755/FB.118.3.8
• Document Type:
  Journal Article
• Funding:
  Grant no. NA16NMF4540081
• Place as Subject:
  North Atlantic Ocean
• Rights Information:
  CC BY
• Compliance:
  Submitted
• Download URL:
  https://repository.library.noaa.gov/view/noaa/29151/noaa_29151_DS1.pdf
• File Type:
  [PDF - 1.08 MB]
• Collection(s):
  Office of Oceanic and Atmospheric Research (OAR)
• Main Document Checksum:
  urn:sha256:88521385c09a2f3490749a61fac0a63c49b059fa6d2a337740869118e6a378ea