Nom du corpus

Corpus Systématique Animale

Titre du document

New information on age and growth in length of Micromesistius australis , Norman 1937 (Pisces, Gadidae), in the South-West Atlantic

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Poissons_v2b_000166
Auteur(s)
  • E. R. Barrera-Oro 1
  • A. P. Tomo 1
Affiliation(s)
  • 1) División Biología, Instituto Antartico Argentino, Cerrito 1248, 1010, Buenos Aires, República Argentina
Résumé

Sagittal otoliths were used for age determination in 1121 specimens of Micromesistius australis, caught in waters of the South-West Atlantic during the cruises made by the ships Walther Herwig and Shinkai Maru in agreement with the Argentine Republic, during the years 1978 and 1978/1979, respectively. The interpretation of growth rings required the otoliths to undergo a paraffin wax embedding and cutting technique. The relations otolith length-fish length and fish length-half otolith width were linear. Thus, back calculations, when necessary, were made by a simple extrapolation. Numbers of males and females were nearly equal, resulting in a sex ratio of 1:1.09. Length frequencies and age distributions were calculated for each sex separately. A significant difference in growth between sexes was found, curves for each were derived. A linear, regression was made and the Von Bertalanffy equation estimated as: Lt=56.90 [1-e-0.1983 (t+1.84)], in males, and Lt=60.08 [1-e-0.1769 (t+2.07)] in females, with Lt in cm and t in years. For estimation of these equation parameters age groups 2–16 years in males and 2–22 years in females were taken into account. All theoretical Lt values and almost all observed lengths for females were greater than those of males in corresponding age groups. Previously published observations about M. australis on this subject, are not in agreement or only in partial accord with present results. These are discussed. Original photographs of otolith cross sections illustrating age determination methods are presented for the first time in age and growth studies of this species.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - marine biology & hydrobiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - invertebres
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - General Agricultural and Biological Sciences
Catégories WoS
  • 1 - science ; 2 - ecology
  • 1 - science ; 2 - biodiversity conservation
Identifiant ISTEX
9E27167C6E5D444B10FE0BBD3B601FAB58D6DD59
Revue

Polar Biology

Année de publication
1988
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.638
Sous-corpus
  • Poissons
Type de publication
Journal
ark:/67375/1BB-JBNPPZ9T-8
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