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Marine Biology

, Volume 129, Issue 2, pp 279–287 | Cite as

Validation of daily increment deposition in otoliths. Age and growth determination of Aphia minuta (Pisces: Gobiidae) from the northwest Mediterranean

  • M. Iglesias
  • E. B. Brothers
  • B. Morales-Nin

Abstract

The transparent goby Aphia minuta (Risso, 1810) is one of the main target species of the small-scale fishery off the Island of Majorca. Otolith microstructure and length-frequency analysis were used to study the age and growth of this species during the 1982/1983 and 1992/1993 fishing seasons. Daily periodicity of increment formation was determined by experiments with marked otoliths in individuals maintained in captivity. The length range of the catches during the 11 yr period was between 12 and 49 mm, with a main distribution (89%) between 24 and 40 mm. Otolith age-readings indicate that the population exploited in the commercial fishery consists of seven age-groups (2 to 8 mo old), with a very high proportion of individuals (95%) between 3 and 6 mo old. Population growth-curves revealed no differences between males and females. The growth parameters for the whole population are: asymptotic length, L = 53.69 mm; growth coefficient, K = 2.23 yr−1; theoretical age at length zero, t 0 = −0.005 yr. Those individuals of A. minuta caught in Majorca during the winter period reached a maximum age of 7 or 8 mo.

Keywords

Fishing Commercial Fishery Increment Formation Growth Coefficient Fishing Season 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • M. Iglesias
    • 1
  • E. B. Brothers
    • 2
  • B. Morales-Nin
    • 3
  1. 1.Instituto Espanol de Oceanografía, Centro Oceanográfico de Baleares, Apartado 291, E-07080 Palma de Mallorca, SpainES
  2. 2.EFS Consultants, 3 Sunset West, Ithaca, New York 14850, USAUS
  3. 3.Institut Mediterrani d'Estudis Avançats (IMEDEA), CSIC/UIB, Campus Universitario, E-07071, Palma de Mallorca, SpainES

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