Update of ongoing work on age and growth of Antarctic toothfish (Dissostichus mawsoni) from Division 58.4.1 by Spain

We present preliminary results on age and growth of Dissostichus mawsoni for the third season (2015/16) of the Spanish research fishing in the 58.4.1 Division obtained for growth rings on otolith readings. It is included the growth parameters estimates by sex. Growth parameters obtained using length...

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Bibliographic Details
Main Authors: López-Abellán, L.J. (Luis José), Santamaría, M.T.G. (María Teresa García), Sarralde-Vizuete, R. (Roberto), Barreiro-Jueguen, S. (Santiago)
Format: Report
Language:English
Published: Centro Oceanográfico de Canarias
Subjects:
Antarctica
Division 5841
age-length
growth
antarctic toothfish
otoliths
growth rings
microstructure
progress reports
growth curves
age determination
Antarctic
Ross Sea
Antarc*
Antarctic Toothfish
Online Access:http://hdl.handle.net/10508/11283
Description
Summary:We present preliminary results on age and growth of Dissostichus mawsoni for the third season (2015/16) of the Spanish research fishing in the 58.4.1 Division obtained for growth rings on otolith readings. It is included the growth parameters estimates by sex. Growth parameters obtained using length-age pair values are: L∞: 208.2, k: 0.074 and t0: 0.564 for females; L∞: 173, k: 0.089 and t0: -0.1771 for males; and L∞: 226.4, k: 0.05673 and t0: -0.745 all combined. Values differ with the previous estimates, and comparisons are made between seasons all seasons together as well as with the parameter values used in the Ross sea assessment.

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