Fisheries status of the bogue Boops boops (Linnaeus, 1758) in Algerian East Coast (Western Mediterranean Sea)

Abstract

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%.

Age, growth, and mortality of Bogue (Boops boops, Linnaeus, 1758) from the Antalya Bay (Northwest Mediterranean Sea, Türkiye)

“…Estimates of the total mortality (Z), the natural mortality (M), the fishing mortality (F), and exploitation ratio (E) for the presently reported species were 1.12 y -1 , 0.36 y -1 , 0.76 y -1 and 0.68 which is similar to those for other references: between 1.02 to 2.26 y -1 ; 0.15 to 0.67 y -1 ; 0.66 to 1.59 y -1 and 0.46 to 0.87, respectively. 4,7,20,21,38,39 Our estimate E was 0.68 and higher than 0.50. Gulland 30 suggested that a fish stock is optimally exploited at a level of F which generates E = 0.50, F opt = M. Based on these suggestions, our results mean that the available stock is being heavily exploited.…”

“…Allen 34 chose to keep the value of the b exponent constant at 3 for isometrical fish growth. The negative allometric growth were recorded from the Gulf of Antalya, 16 in the Morocco waters, 18 in the Egypt waters, 20 and in the Algerian waters, 21 while the positive allometric growth were in the Greece waters, 35 in the Adriatic Sea, 15 and in the Aegean Sea. 13 Variations in fish shape, and growth increase some of the environmental conditions like temperature, season, habitat and food presence.…”

“…2 Age, growth, and mortality of B. boops, have been studied from the Portuguese coast, Egyptian waters, western Mediterranean coast of Egypt, Tunisian waters, Algarve (South of Portugal), northern Aegean Sea, İzmir Bay, Adriatic coasts (Velebit Channel), Egyptian Mediterranean waters off Alexandria Egypt, İzmir Bay, Montenegrin waters, northern and central Adriatic Sea, Gulf of Antalya, southern Tyrrhenian Sea, between Nador and Sidia (Morocco), Güllük Bay, Mediterranean waters front Alexandria, Algerian East coast,and Saros Bay. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] Despite its commercial importance, the biology and population parameters of B. boops are not well known in the northeastern Mediterranean Sea, Türkiye.…”

Microplastic in Commercial Fish in the Mediterranean Sea, the Red Sea and the Arabian Gulf. Part 1: The Mediterranean Sea

“…Mediterranean fisheries rely on this fish. In Algeria, it is ranked 4th in commercial importance after sardine, mackerel and round sardinella, representing 3% of the catch[110]. In all studies except for one (South Sardinia[107]), B. boops shows a high ingestion of MP, especially along the Spanish, French and Italian coasts.…”

“…has been subject to a number of studies on microplastic ingestion[104] [105] Journal of Water Resource and Protection[106] [107][108]. another fish that is of tremendous commercial importance for the Mediterranean, making for about 20% of the fish landings in the Mediterranean Sea (59% of the landings in Algeria[110]). Numerous studies on the fish[93] [101][108] [111][112] [113] [114] have shown that its MP ingestion is high in most regions of the Mediterranean, where often over 12% of the fish have been found with MP in their gastrointestinal tract with the highest frequency of 96% reported in the Adriatic Sea[115].…”