Browsing by Author "BERROUK, H"

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    Biological parameters of Luciobarbus callensis populates Beni-Haroun dam, north-eastern Algeria
    (2020-11-14) BERROUK, H; SAHTOUT, F; BOUALLEG, C.
    Berrouk H, Sahtout F, Boualleg C. 2020. Biological parameters of Luciobarbus callensis populates Beni-Haroun dam, northeastern Algeria. Biodiversitas 21: 5691-5697. Fish age and growth data mainly assist many ichthyologists to understand the life history features of species and populations Growth is a major process of fish biology, and considered as one of the key processes of lengthstructured models of fishes. Thus, the present study was devoted to studying growth of an autochthonous species (Luciobarbus callensis), populating the dam of Beni-Haroun (Mila city, northeast of Algeria), and is known for its socio-economic value and aquaculture interest. The study was conducted on a sample of 257 fish individuals during the period 2015-2016. The age of L. callensis was determined by using the scalimetry method, providing easier sampling and reading procedures, and also high precision. Fish sexes were identified via the observation of gonads, by naked eye based on gonad shape and color, where the number of females was higher (165) than males (92).The obtained results revealed a maximum longevity of seven years of L. callensis, and the determined growth parameters of the separated and combined fish sexes were found to be as follow: L∞ = 47,3 cm; K = 0.29; t0 = -0.51; Ø’ = 2,813 (females); L∞ = 42,11 cm; K = 0.26; t0 = - 0.58; Ø’ = 2,663 (males); and L∞ = 47 37 cm; K = 0.20; t0 = -0.75; Ø’ = 2,652 (combined sex). Moreover, the evolution of the total weight of fishes with respect to their size presents minor allometry (b<3).(with or without sex distinction)
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    INDIVIDUAL AND COMBINED EFFECTS OF A FUNGICIDE (VALETTE) AND AN HERBICIDE (OSCAR) ON THE GROWTH AND MORTALITY OF EARTHWORM LUMBRICUS TERRESTERIS (LINNAEUS, 1758
    (2023-03-08) BERROUK, H; NECIB, A; MERAIAHIA, A; BOUMAZA, N.E; HMAIDIA, K.
    Earthworms are valuable soil invertebrate mainly used to monitor environmental quality. Thus, the present study was undertaken to provide insights on the individual and combined toxicological effects of two commonly used pesticides in Souk Ahras city (Northeast Algeria), namely Valette (fungicide) and Oscar (herbicide) on a soil invertebrate – earthworm (Lumbricus terresteris) as a bio-indicator of soil pollution. The invertebrates were subjected to increasing concentrations of each chemical (0, 2, 4, 6, 8, 12.5, 25 and 50 mg/500 mg soil) for four treatment periods (24, 48, 72 and 96 hours). Physicochemical analysis revealed that the soil pH is alkaline, and water and KCl pH are respectively 8.05 and 7.72, in addition to a sandy-loamy soil texture with a saturation rate of 49.43%, and high level of organic matter (11%). Additionally, both chemicals caused a significant weight decrease (p˂0.05) from the concentration of 12.5 mg/mg soil, and noteworthy, no mortality was recorded during the entire experimental period, either for the individual or combined exposure. Furthermore, the histopathological observations showed no signs of alteration or damage to epidermal cells and muscle fibers during the treatment periods with either chemical