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Turkish Journal of Fisheries and Aquatic Sciences 2021, Vol 21, Num, 8     (Pages: 381-399)

Reproductive Traits and Somatic Growth of Diplodus sargus sargus (Linnaeus, 1758) in the Central Algerian Coast (Southern Mediterranean Sea)

Bilal Boufekane 1 ,Nadia Chakroun-Marzouk 2 ,Elyes Kelai 1-3 ,Zakia Alioua 1 ,Soumia Amira 1 ,Kamel Harchouche 1

1 University of Science and Technology Houari Boumediene, Faculty of Biological Sciences, Fisheries Laboratory, Bab Ezzouar, El-Alia, PO Box 32, 16111, Algiers, Algeria.
2 University of Tunis El Manar, Faculty of Sciences of Tunis, Biology Department, Fundamental and Applied Ichthyology Laboratory, 2092 El Manar II, Tunis, Tunisia
3 Center for Scientific and Technical Research in Physico-Chemical Analysis, Zone Industrielle PO Box 384, 42004 Bou-Ismail, Tipaza, Algeria
DOI : 10.4194/1303-2712-v21_8_03 Viewed : 1749 - Downloaded : 1579 This work provides useful knowledge on the reproductive traits and somatic growth of the white seabream (Diplodus sargus sargus Linnaeus, 1758) of the central sector of the Algerian coast. It aimed to estimate the maximum yield size of this sparid and evaluate its reproductive potential, by presenting the first results on its global fecundity. A total of 497 specimens, ranging in size from 12.4 to 40.3 cm, were monthly and randomly sampled from the artisanal fishery fleet, between January and December 2017. The obtained length-weight relationships indicated negative allometry for males (TW=0.024 TL2.842) and isometry for females (TW=0.016 TL3.013). The white seabream is a digynic protandrous hermaphrodite species. Sex reversal was observed with a large size overlap of 12 to 32 cm with a median of 23.5 cm. The reproductive season was observed from January to May and spawning occurred in spring. The size at first sexual maturity (TL50) was 20.55 cm for both sexes. Based on these results, the current legal minimum size of capture should be raised in the study area. Keywords : Diplodus sargus sargus, Reproductive cycle, Length-weight relationship, Size at maturity