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Age and Growth of the Areolate Grouper Epinephelus areolatus from the Gulf of Suez

Received: 5 July 2015     Accepted: 6 July 2015     Published: 2 September 2015
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Abstract

Age and growth of the associated coral reef grouper, Epinephelus areolatus, were estimated for samples collected from the artisanal fishery in the Gulf of Suez during November 2013 and October 2014. Otoliths of 597 specimens ranged in length from 11.2 to 50.5 cm were used in age determination. The otoliths showed alternating opaque (light) and translucent zones when seen by reflected light against a dark background, a translu¬cent zone plus the opaque zone immediately around it formed an annulus. According to the otolith examination, the maximum life span of E areolatus was eight years with mean lengths of 16.9, 24, 29.9, 35.7, 39.7, 43.4, 46.6 and 49.7 cm for the age groups from one to eight respectively. Individuals belong to age group two constituted the bulk of the catch with more than 60% of the population. The results showed that the E. areolatus is a relatively slow growing species and the values of the von Bertalanffy growth function was estimated as K = 0.154, L∞ = 66.55 cm (LT) and t0 = −0.91 years. The estimated growth performance index is 2.83. The length weight relationship was estimated as a = 0.0135 and b = 2.9947, r2 =0.981 indicating an isometric growth of the weight relative to the length.

Published in American Journal of Life Sciences (Volume 3, Issue 6-1)

This article belongs to the Special Issue New Horizons in Basic and Applied Zoological Research

DOI 10.11648/j.ajls.s.2015030601.12
Page(s) 7-12
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2015. Published by Science Publishing Group

Keywords

Age and Growth, Epinephelus areolatus, Gulf of Suez

References
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[2] A. C. J. Vincent and Y. J. Sadovy, “Reproductive ecology in the conservation and management of fishes.” Pp.209–245, 1998. In T. M. Caro, ed. Behavioural Ecology and Conservation Biology. Oxford University Press, New York.
[3] J. E. Randall, “Red Sea reef fishes,” IMMEL Publications, London. 192 pp. 1983.
[4] R. M. Starr, E. Sala, E. Ballesteros and M. Zabala, “Spatial dynamics of the Nassau grouper Epinephelus striatus in a Caribbean atoll,” Marine Ecology Progress Series. Vol. 343, pp.239–249, 2007.
[5] A. A. Hassan, “Biology and fishery studies on the Serranidae Epinephelus areolatus from the Red Sea,” Ph.D. Thesis, Ain Shams University, Egypt, 1988.
[6] H. H. Mahmoud, “Gonadal Maturation and Histological Observations of Epinephelus areolatus and Lethrinus nebulosus in Halaieb/Shalatien Area, Red Sea, Egypt,” Global Veterinaria, vol. 3(5), pp.414-423,2009.
[7] H. F. Alkahem, Z. Ahmad and A. A. A. Al-Dhahi, “Studies on age and growth of Epinephelus chlorostigma and Epinephelus areolatus from Arabian Gulf,” Agriculture Research Journal. Suez Canal University. Vol. 3(1), pp.27-31, 2004.
[8] A. Zubair, H. A. Al-Kahem and A. A. Amir, “Fecundity, Sex Ratio and Gonado-somatic Index of Epinephelus Chlorostigma and Epinephelus Areolatus Sampled from Arabian Gulf,” Animal Biology Journal. Vol. 2(3), pp.87-96, 2011.
[9] k. Sujatha, V. L. S. kantimahanti and. V. A. D. Iswarya, “Species diversity and some aspects of reproductive biology and life history of groupers (Pisces: Serranidae: Epinephelinae) off the central eastern coast of India,” Marine Biology Research. Vol. 11(1), pp.18–33, 2015.
[10] W. E. Ricker, “Computation and interpretation of biological statistics of fish population,” Bull. Fish. Res. Bd. Can., No. (191) 382pp.1975.
[11] D. G. Chapman, “Statistical problems in dynamics of exploited fisheries population,” Proc. 4th. Berkeley Symp. Math. Statist. Probl., vol. 4, pp.153-168, 1960.
[12] J. A. Gulland and S. L. Holt, “Estimation of growth parameter for data at unequal time intervals,” J. Cons. Perm. Int. Explor. Mer, vol. 25(1), pp47-49, 1959.
[13] E. Ford, “An account of the herring investigation conductive at Plymouth during the years from 1929-1933,” J. Mar. Bio. Asse. U. K. vol. 19, pp.305-384, 1933.
[14] L. A. Walford, “A new graphic method of describing the growth of animals,” Biol. Bull. vol. 90(2), pp.141-147, 1946.
[15] D. Pauly, “Theory and management of tropical multispecies stocks: a review with emphasis on the Southeast Asian demersal fisheries,” ICLARM Review Studies 1: 35pp. 1979.
[16] J. Moreau, C. Bambino and D. Pauly, “Indices of overall growth performance of 100 tilapia (Cichlidae) populations,” pp.201-206, 1986. In: J.L. Maclean, L.B. Dizon & L.V. Hosillos (eds.) The First Asian Fisheries Forumn 727 p. Asian Fisheries Society, Manila, Philippines.
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    Ezzat Abd-Allah, Azza El-Ganainy, Alaa Osman. (2015). Age and Growth of the Areolate Grouper Epinephelus areolatus from the Gulf of Suez. American Journal of Life Sciences, 3(6-1), 7-12. https://doi.org/10.11648/j.ajls.s.2015030601.12

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    ACS Style

    Ezzat Abd-Allah; Azza El-Ganainy; Alaa Osman. Age and Growth of the Areolate Grouper Epinephelus areolatus from the Gulf of Suez. Am. J. Life Sci. 2015, 3(6-1), 7-12. doi: 10.11648/j.ajls.s.2015030601.12

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    AMA Style

    Ezzat Abd-Allah, Azza El-Ganainy, Alaa Osman. Age and Growth of the Areolate Grouper Epinephelus areolatus from the Gulf of Suez. Am J Life Sci. 2015;3(6-1):7-12. doi: 10.11648/j.ajls.s.2015030601.12

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  • @article{10.11648/j.ajls.s.2015030601.12,
      author = {Ezzat Abd-Allah and Azza El-Ganainy and Alaa Osman},
      title = {Age and Growth of the Areolate Grouper Epinephelus areolatus from the Gulf of Suez},
      journal = {American Journal of Life Sciences},
      volume = {3},
      number = {6-1},
      pages = {7-12},
      doi = {10.11648/j.ajls.s.2015030601.12},
      url = {https://doi.org/10.11648/j.ajls.s.2015030601.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajls.s.2015030601.12},
      abstract = {Age and growth of the associated coral reef grouper, Epinephelus areolatus, were estimated for samples collected from the artisanal fishery in the Gulf of Suez during November 2013 and October 2014. Otoliths of 597 specimens ranged in length from 11.2 to 50.5 cm were used in age determination. The otoliths showed alternating opaque (light) and translucent zones when seen by reflected light against a dark background, a translu¬cent zone plus the opaque zone immediately around it formed an annulus. According to the otolith examination, the maximum life span of E areolatus was eight years with mean lengths of 16.9, 24, 29.9, 35.7, 39.7, 43.4, 46.6 and 49.7 cm for the age groups from one to eight respectively. Individuals belong to age group two constituted the bulk of the catch with more than 60% of the population. The results showed that the E. areolatus is a relatively slow growing species and the values of the von Bertalanffy growth function was estimated as K = 0.154, L∞ = 66.55 cm (LT) and t0 = −0.91 years. The estimated growth performance index is 2.83. The length weight relationship was estimated as a = 0.0135 and b = 2.9947, r2 =0.981 indicating an isometric growth of the weight relative to the length.},
     year = {2015}
    }
    

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  • TY  - JOUR
    T1  - Age and Growth of the Areolate Grouper Epinephelus areolatus from the Gulf of Suez
    AU  - Ezzat Abd-Allah
    AU  - Azza El-Ganainy
    AU  - Alaa Osman
    Y1  - 2015/09/02
    PY  - 2015
    N1  - https://doi.org/10.11648/j.ajls.s.2015030601.12
    DO  - 10.11648/j.ajls.s.2015030601.12
    T2  - American Journal of Life Sciences
    JF  - American Journal of Life Sciences
    JO  - American Journal of Life Sciences
    SP  - 7
    EP  - 12
    PB  - Science Publishing Group
    SN  - 2328-5737
    UR  - https://doi.org/10.11648/j.ajls.s.2015030601.12
    AB  - Age and growth of the associated coral reef grouper, Epinephelus areolatus, were estimated for samples collected from the artisanal fishery in the Gulf of Suez during November 2013 and October 2014. Otoliths of 597 specimens ranged in length from 11.2 to 50.5 cm were used in age determination. The otoliths showed alternating opaque (light) and translucent zones when seen by reflected light against a dark background, a translu¬cent zone plus the opaque zone immediately around it formed an annulus. According to the otolith examination, the maximum life span of E areolatus was eight years with mean lengths of 16.9, 24, 29.9, 35.7, 39.7, 43.4, 46.6 and 49.7 cm for the age groups from one to eight respectively. Individuals belong to age group two constituted the bulk of the catch with more than 60% of the population. The results showed that the E. areolatus is a relatively slow growing species and the values of the von Bertalanffy growth function was estimated as K = 0.154, L∞ = 66.55 cm (LT) and t0 = −0.91 years. The estimated growth performance index is 2.83. The length weight relationship was estimated as a = 0.0135 and b = 2.9947, r2 =0.981 indicating an isometric growth of the weight relative to the length.
    VL  - 3
    IS  - 6-1
    ER  - 

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Author Information
  • Zoology Department, Faculty of Science, Al-Azhar University, Assiut, Egypt

  • Fisheries Division, National Institute of Oceanography and Fisheries, Suez, Egypt

  • Zoology Department, Faculty of Science, Al-Azhar University, Assiut, Egypt

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