Reproductive Biology of the Brushtooth Lizardfish (Saurida undosquamis) (Richardson, 1848) Inhabiting the Northern Gulf of Suez and the South-Eastern Mediterranean Sea
A. Roshdy et al., A. (2021). Reproductive Biology of the Brushtooth Lizardfish (Saurida undosquamis) (Richardson, 1848) Inhabiting the Northern Gulf of Suez and the South-Eastern Mediterranean Sea. EKB Journal Management System, 25(6), 165-180. doi: 10.21608/ejabf.2021.210928
Alaa A. Roshdy et al.. "Reproductive Biology of the Brushtooth Lizardfish (Saurida undosquamis) (Richardson, 1848) Inhabiting the Northern Gulf of Suez and the South-Eastern Mediterranean Sea". EKB Journal Management System, 25, 6, 2021, 165-180. doi: 10.21608/ejabf.2021.210928
A. Roshdy et al., A. (2021). 'Reproductive Biology of the Brushtooth Lizardfish (Saurida undosquamis) (Richardson, 1848) Inhabiting the Northern Gulf of Suez and the South-Eastern Mediterranean Sea', EKB Journal Management System, 25(6), pp. 165-180. doi: 10.21608/ejabf.2021.210928
A. Roshdy et al., A. Reproductive Biology of the Brushtooth Lizardfish (Saurida undosquamis) (Richardson, 1848) Inhabiting the Northern Gulf of Suez and the South-Eastern Mediterranean Sea. EKB Journal Management System, 2021; 25(6): 165-180. doi: 10.21608/ejabf.2021.210928

Reproductive Biology of the Brushtooth Lizardfish (Saurida undosquamis) (Richardson, 1848) Inhabiting the Northern Gulf of Suez and the South-Eastern Mediterranean Sea

Egyptian Journal of Aquatic Biology and Fisheries
Article 12, Volume 25, Issue 6, November and December 2021, Page 165-180  XML PDF (773.4 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2021.210928
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Author
Alaa A. Roshdy et al.
Abstract
The Brushtooth Lizardfish Saurida undosquamis is one of the economically successful Lessepsian species, which migrated from the Red Sea to the Mediterranean Sea. The present study was carried out from September 2018 till April 2019 in the Northern Gulf of Suez (at Suez) and from March 2018 to March 2019 in the South-Eastern Mediterranean Sea (at Port Said). A total of 838 specimens were monthly collected from both sites. Overall sex ratio was 1:0.40 and 1:0.54 for the Gulf of Suez and the Mediterranean population, respectively. There was a highly significant difference between the ratios of both sexes in both populations (P<0.001). The monthly changes in maturity stages and gonado-somatic index showed that S. undosquamis have a prolonged spawning season extending from December to April in the Gulf of Suez and from June to March, with two major spawns occurring in August and February in the Mediterranean Sea. The fish length corresponding to 50% (L50) was 17.3 cm for males and 18.2 cm for females from the Gulf of Suez, whereas it was 16.9 cm for males and 17.8 cm for females from the Mediterranean Sea. The absolute fecundity for the Gulf of Suez population ranged from 14750 to 63553 ova (average: 38075 ± 18181 ova) for fish that ranged from 20-22 cm to 30-32 cm (TL). For the Mediterranean Sea population, the absolute fecundity ranged from 18090 to 62025 ova (average: 39274 ± 15783 ova) for fish that ranged from 18-20 cm to 30-32 cm (TL).
 
Keywords
Lessepsian migration; Saurida undosquamis; Sex ratio; First maturity; Gonado-somatic index; Fecundity
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