Temperature-dependent growth as a function of size and age in juvenile Arctic cod (Boreogadus saida)

Details

• Journal Title:
  ICES Journal of Marine Science
• Personal Author:
  Laurel, Benjamin J. ; Copeman, Louise A. ; Spencer, Mara ; Iseri, Paul
• NOAA Program & Office:
  NMFS (National Marine Fisheries Service) ; AFSC (Alaska Fisheries Science Center)
• Description:
  Forecasting climate-driven ecosystem impacts in the Arctic is currently limited by the availability of biological data on key species. In this study, we carried out a series of temperature-dependent growth experiments on juvenile Arctic cod (Boreogadus saida), an important forage fish species at the Atlantic- and Pacific-Arctic interface. Multi-week growth experiments were conducted across a range of temperatures (−1 to 16 °C), ages (age-0 and age-1) and sizes (45–125 mm SL) to determine best-fit temperature-dependent growth models. Temperature-dependent growth models considered were 1) a single model using pooled fish of mixed ages and sizes (Model A), separate models for age 0 and age 1 fish (Model B0 and B1), and a Lorentzian three-dimensional model incorporating size but not age (Model C). All juvenile Arctic cod demonstrated relatively high growth at cold temperatures (<2 °C; ∼0.75–1.00% d−1) with a deceleration in growth rate above 6.4 °C and 9.0 °C for age-1 and age-0 cod respectively. As such, Model A did not explain as much temperature-dependent growth (R2 = 51%) as Model B0 (R2 = 98%) and Model B1 (R2 = 93%). Model C did reasonably well in explaining growth over a continuous range of sizes (R2 =71%) but explained less variance than either of the age models (Model B). These results stress the importance of considering the early ontogenetic effects on temperature-dependent growth variation in juvenile Arctic cod when projecting climate-driven changes in Arctic marine ecosystems.
• Source:
  ICES Journal of Marine Science, 74(6), 1614-1621
• DOI:
  https://doi.org/10.1093/icesjms/fsx028
• ISSN:
  1054-3139 ; 1095-9289
• Format:
  pdf
• Publisher:
  Oxford University Press (OUP)
• Document Type:
  Journal Article
• Rights Information:
  Other
• Compliance:
  Library
• Main Document Checksum:
  urn:sha-512:a6e95a0dfdc892d31fa44a751289ecaac44bd52045c4d9698f085ecdf10bfc421ecc382f5eb5c86632b9d7c99b9bfdf2383c00360832ec6abf7f59578f211592
• Download URL:
  https://repository.library.noaa.gov/view/noaa/68934/noaa_68934_DS1.pdf
• File Type:
  [PDF - 349.50 KB ]