Keywords: Serranus cabrillaGrowth parameters Mortality Exploitation rate Mediterranean Some population parameters of the comber, Serranus cabrilla, were presented in this study. From January to December 2018, a total of 1250 samples of Serranus cabrilla (11 ≤ TL ≤ 23.9 cm, 14.34 ≤ TW ≤ 157.7 g), have been studied in the Gulf of Annaba (Eastern coasts of Algeria), based on length-frequency data. FiSAT II software was used for different analyses. The growth parameters of Von Bertalanffy are L ∞ = 24.94 cm, k = 0.38 year -1 and to = -0.45 year, with a performance of growth (φʹ) of 2.37. The total (Z) and natural (M) mortality of comber in the Annaba gulf were equal to 1.41 and 0.81 year -1 respectively, while the fishing mortality was estimated to 0.60. The exploitation rate is around 0.45 and indicates that the population of comber is lightly under exploited in the study area. The length at first capture (L c50 ) is equal to 12.04 cm.

Yield per recruit MSY Algeria This study is the first that deals with the stock status of the bogue Boops boops (Linnaeus, 1758) in the Eastern Algerian coast (Western Mediterranean). It aims is to estimate the important parameters needed to evaluate the dynamics of the stock of this species which is economically important resource in Algeria. The FiSAT II software has been used for data analysis. The total length and weight of the fishes sampled ranged from 10.1 to 30.9 cm and from 13.47 to 268.15 g, respectively. The longevity has been estimated at 5 years. The parameters of von Bertalanffy growth curve were L∞ = 32.03 cm, K = 0.28 yr-1 , t o =-1.13 years and ɸ' = 2.45. The lengthweight relationships was described by parameters a = 0.016 and b = 2.815, reflecting a trend towards negative allometric growth. The total mortality (Z), natural (M) and fishing (F) mortalities were 1.03, 0.37 and 0.66 yr-1 , respectively. The current exploitation rate (E) of the species was 0.64. The relative yield per recruit analysis (Y'/R) from the Beverton-Holt showed that the current level of exploitation is significantly higher than E max and E 0.5 (0.54 and 0.32 respectively), indicating that the population is overexploited and suffers from fishing pressure. For sustainable management of this resource, the current exploitation rate should be reduced by 50%.