Updated reproductive parameters for the shortfin mako, Isurus oxyrinchus, in the North Atlantic with inferences of distribution by sex and reproductive stage

Details

• Journal Title:
  Fishery Bulletin
• Personal Author:
  Natanson, Lisa J. ; Winton, Megan ; Bowlby, Heather ; Joyce, Warren ; Deacy, Bethany ; Coelho, Rui ; Rosa, Daniela
• NOAA Program & Office:
  NMFS (National Marine Fisheries Service) ; NEFSC (Northeast Fisheries Science Center)
• Description:
  Prompted by recent concern about the stock status of the shortfin mako (Isurus oxyrinchus) in the
  
  North Atlantic Ocean, we examined
  
  reproductive data from 731 individuals
  
  (351 females and 380 males) collected
  
  by 3 scientific organizations to improve
  
  estimates of size and age at maturity.
  
  Males ranged in size from 70 to 283 cm
  
  fork length (FL) and females from
  
  71 to 338 cm FL. Females matured
  
  between 263 and 291 cm FL, with an
  
  estimated median length at maturity
  
  (L50) of 280 cm FL and a median weight
  
  at maturity (WT50) of 275 kg. Males
  
  matured between 173 and 187 cm FL,
  
  with an L50 of 182 cm FL and WT50 of
  
  64 kg. Catch records from 4 international programs were also examined
  
  to investigate spatiotemporal variation
  
  in the distribution of life history stages
  
  based on updated size-at-maturity estimates and to identify potential parturition and nursery grounds. These
  
  records identified the Gulf of Mexico
  
  and the eastern North Atlantic Ocean
  
  off Portugal as birthing and nursery
  
  areas, with the most important nursery
  
  area occurring in the western North
  
  Atlantic Ocean.
  
  
• Keywords:
  Shortfin mako
• Source:
  Fishery Bulletin, 118(1)
• DOI:
  https://doi.org/10.7755/FB.118.1.3
• Document Type:
  Journal Article
• Place as Subject:
  Atlantic Ocean
• Rights Information:
  Public Domain
• Compliance:
  Submitted
• Main Document Checksum:
  urn:sha256:596454c565b463b63f0c127a14efc099f64d3a25fde20915c3121d9be20a3eb0
• Download URL:
  https://repository.library.noaa.gov/view/noaa/31618/noaa_31618_DS1.pdf
• File Type:
  [PDF - 1.37 MB ]