Mortality Rates, Relative Yield Per Recruit and Parasitic Infestations of Striped Piggy (Pomadasys stridens) from Lake Temsah, Egypt

Nashaat, Mai; Eid, Noha

doi:10.21608/ejabf.2025.416415.6454

Mortality Rates, Relative Yield Per Recruit and Parasitic Infestations of Striped Piggy (Pomadasys stridens) from Lake Temsah, Egypt

Document Type : Original Article

Authors

Mai Nashaat ¹
Noha Eid ²

¹ National Institute of Oceanography and Fisheries (NIOF), Egypt.

² National Institute of Oceanography and Fisheries, NIOF, Egypt

10.21608/ejabf.2025.416415.6454

Abstract

Striped piggy fish (Pomadasys stridens) were randomly collected from Lake Temsah by fishermen during the 2022 fishing season. Mortality rates and relative yield per recruit were calculated using the von Bertalanffy growth function method. The estimated length at first capture (Lc) was 9.32cm. The natural, total, and fishing mortality rates were estimated at 0.32, 1.70, and 1.42 year⁻¹, respectively. These findings indicate a high level of exploitation of the striped piggy population in Lake Temsah. Relative yield per recruit analysis confirmed that the population of P. stridens is overexploited. This highlights the urgent need for management measures to ensure the long-term sustainability of the fishery. Additionally, a subsample of 200 fish was examined for parasitic infestations. The prevalence of Livoneca redmanii Leach, 1818 (Isopoda, Cymothoida) was 15%. Infestation was higher in females (66.6%) compared to males (33.3%). These results suggest that parasitic infestations may contribute to the elevated mortality rates observed in the population. Further research is recommended to assess the parasitic impacts on other commercially important fish species in the Suez Canal region, given their ecological and economic significance.

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