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The study of reproduction biology of gilthed seabream (Sparus aurata L.) in the Syrian Coast

دراسة بيولوجيا التكاثر عند سمك القجاج (Sparus aurata L.) في الساحل السوري.

1942   1   62   0 ( 0 )
 Publication date 2015
  fields Biology
and research's language is العربية
 Created by Shamra Editor




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This study has been done on Sparus aurata (Sparidae). Fish samples (297 individuals) were collected along the Syrian Coast from March 2012 to February 2014. Total length (T) was 15 - 31 cm, and the total weight (W) was 53,1 - 410,34 g. The study of gonado somatic index (GSI) showed that the reproduction period was between November and February with a maturity peak in January (3.98±0.97)% for females ,and in December (2.19±0.29)% for males. In addition, the length at the first sexual maturity was (21.5 cm) and (22.5 cm) for males and females respectively. The results of the hepato somatic index (HSI) was compatible with the surrounding environmental and physiological changes which resulted from the change of sexual activity during the reproductive cycle. Fecundity showed a wide range for a given length, there was a linear relationship between the absolute fecundity and each of length groups and total weight. Relative fecundity was (567896-849362) egg per 1kg body weight. The frequency distribution of eggs diameters revealed the presence of one peak, and the eggs diameter during the reproduction period ranged from 0.05 to 0.3mm.


Artificial intelligence review:
Research summary
تتناول هذه الدراسة بيولوجيا التكاثر لسمك القجاج (Sparus aurata) على الساحل السوري. جمعت العينات من مارس 2012 حتى فبراير 2014، وبلغ عددها 297 فردًا بأطوال تتراوح بين 15 و31 سم وأوزان بين 53.1 و410.34 غرام. أظهرت الدراسة أن فترة التكاثر تمتد من نوفمبر إلى فبراير، مع ذروة نضج في يناير. الطول عند أول نضج جنسي كان 21.5 سم للذكور و22.5 سم للإناث. مؤشر وزن الكبد النسبي (HSI) أظهر توافقًا مع التغيرات البيئية والفيزيولوجية خلال دورة التكاثر. الخصوبة المطلقة تراوحت بين 567896 و849362 بيضة لكل 1 كغ من وزن الجسم. أقطار البيوض تراوحت بين 0.05 و0.3 مم خلال موسم التكاثر. الدراسة تقدم بيانات هامة لتحديد فترات الصيد المناسبة وحماية المخزون السمكي.
Critical review
دراسة نقدية: تقدم هذه الدراسة معلومات قيمة حول بيولوجيا التكاثر لسمك القجاج في الساحل السوري، وهي الأولى من نوعها في هذا المجال. ومع ذلك، يمكن أن تكون هناك بعض النقاط التي تحتاج إلى تحسين. على سبيل المثال، كان من الممكن توسيع نطاق الدراسة لتشمل مناطق أخرى من الساحل السوري للحصول على صورة أكثر شمولية. كما أن الدراسة لم تتناول تأثير التغيرات المناخية على دورة التكاثر، وهو موضوع يمكن أن يكون له تأثير كبير على النتائج. بالإضافة إلى ذلك، كان من الممكن استخدام تقنيات تحليلية أكثر تقدمًا لتحليل البيانات البيولوجية بشكل أعمق.
Questions related to the research
  1. ما هي فترة التكاثر لسمك القجاج في الساحل السوري؟

    تمتد فترة التكاثر لسمك القجاج في الساحل السوري من نوفمبر إلى فبراير، مع ذروة نضج في يناير.

  2. ما هو الطول عند أول نضج جنسي لسمك القجاج؟

    الطول عند أول نضج جنسي هو 21.5 سم للذكور و22.5 سم للإناث.

  3. ما هي أقطار البيوض خلال موسم التكاثر؟

    تراوحت أقطار البيوض خلال موسم التكاثر بين 0.05 و0.3 مم.

  4. ما هي الخصوبة المطلقة لسمك القجاج؟

    الخصوبة المطلقة تراوحت بين 567896 و849362 بيضة لكل 1 كغ من وزن الجسم.


References used
AHMED,M.S. Population dynamics and fisheries management of Gilthead sea bream, Sparus aurata (f.sparidae) from Baradawil lagoon, North Sinai,Egypt. Egept J. Aquat.Biol.&fish.15,2011,57-69
Al-ABSAWY,M.A.The reproductive biology and the histological and ultrastructural characteristics in ovaries of the female Gadidae fish Merluccius merluccius from the Egyptian Mediterranean water. African Journal of Biotechnology Vol. 9(17),2010, pp. 2544-2559
ALMANSA, E.; MARTIN,M.V.; CEJAS,J.R.; BADIA, P.; JEREZ,S. and LORENZO,A. Lipid and fatty acid composition of female gilthead seabream during their reproductive cycle: effects of a diet lacking n-3 HUFA. J. Fish Biol., 59,2001, 267-286
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