Department of Biology

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Author: search.filters.author. Berrouk, HStart date: 1640

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    Length-Weight Relationships of the Bream Abramis Brama (Linnaeus, 1758) in Beni- Haroun Dam of Mila City (North-East Of Algeria)
    (2022-12-17) Tolba, M; Hadjab, R; Chikara, B. M; Berrouk, H; Kaouachi, N.
    The study of fish growth is a valuable tool in providing good understanding on the general biology and growth of fish populations, in addition to the comparison of the same fish species populations living in remote geographic areas. Thus, the present work was designed to study the age and growth of Abramis brama species newly introduced in Beni-Haroun dam (Mila department, Northeast Algeria). Here, the study was conducted on sampling of 141 individuals from July 2015 to October 2016. The age of fishes was determined according to scalimetric method, since the fish sex was determined by macroscopic method, showing that the number of females is higher (97) than that of males (44). The growth study was performed according to the mathematical method of Von Bertalanffy (1938). Based on the results of the growth parameters (L∞=40 cm; K= 0.27; t0=0.55; Ø’= 2.49. Males L∞= 35.26 cm; K = 0.32; t0= -0.49; Ø’= 2.59, combined sexes L∞=40cm; K= 0.31; t0=-0.49 years, and Ø’ = 2.69), Abramis brama can live up to five years. Moreover, the evolution of total fish weights in function of their size reveals a minor allometry (b<3) (with and without distinction of sex), while the other obtained values provide good fits to Von Bertalanffy growth model
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    Parasite Biodiversity in Four Cyprinid Fishes from Beni-Haroun Dam (Mila City) North-East of Algeria
    (2020-07-06) Berrouk, H; Allalgu, A; Kaouachi, N; Boualleg, C
    Herein, the examination of 776 fishes related to 4 species of cyprinid fishes (Luciobarbus callensis, Cyprinus carpio, Carassuis carassuis and Abramis brama) and collected from Beni-Haroun dam promoted us to identify 99 infested individuals by 249 copepod parasites belonging to eight species, namely Ergasilus peregrinus, Ergasils briani, Ergasilus megaceros, Ergasilus sielboldi, Paraergasilus brevigiditus, Neoergasilus longispinosus, Neoergasilus japonicus and Lernea cyprinacea. The epidemiological study showed that the highest parasite indices were noticed in Cyprinus carpio (P% = 23.7, I =3.96 and A = 0.94) followed by Luciobarbus callensis (P% = 12. 84, I = 2.36 and A = 0.30), since the lowest values were observed in Abramis brama (P% = 5.63%, I = 1 and A = 0.05). Moreover, the parasite biodiversity based on the diversity indices that one time is related to the species host and at other times to season have shown that the determined parasite diversity considered weak in its group, as well as Luciobarbus callensis showed the very significant values of specific richness, followed by Carassuis carassuis and Cyprinus carpio, whereas Abramis brama hosts only two species. According to season, the very important values of parasite diversity was determined during summer followed by spring and fall, while the low values were noticed in winter. According to host fish criterion, the study showed two indicator species for Carassuis carassuis and three for Cyprinus carpio, in addition to three indicator species found during spring and three others during summer
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    Copepod Parasites of the Gills of Luciobarbus Callensis (Valencienne, 1842) and Carassius Carassius (Linnaeus, 1758) (Cyprinid Fish) Collected from Beni Haroun Dam (Mila, Algeria).
    (2018-10-12) Berrouk, H; Tolba, M; Boucenna, I; Touarfia, M; Bensouilah, M; Kaouachi, N; Boualleg, C.
    In aquaculture, the crustaceans are classified among the most dreadful parasites due to their high potential contamination hazards. Some parasitic copepods are responsible for a massive mortality of stocks, however, there has been a lack of knowledge on the Algerian freshwater fish. Therefore, the present work aimed to study the infestation of copepod ectoparasites of 499 fish, including 257 individuals of Luciobarbus callensis (Valencienne ,1842) and 242 of Carassius carassius (Linnaeus, 1758) species found in Beni Haroun Dam (Mila, Algeria). The fish were subjected to some morphometric measurements, and thereby, a gill dissection was measured, harvested, preserved and identified, as well the parasitic indices were calculated. The effect of some parameters (size, sex season, and microhabitat) on the parasite infestation was tested by using 𝜒𝜒2 test. The gill examination of the individuals of the two host populations led to an inventory of eight parasitic species in Luciobarbus callensis and six species in Carassius carassius. Also, the study of epidemiologic indices of host species revealed that the higher recorded values were found in Luciobarbus callensis (P= 12,84%; I=2.33; A=0.29) (Tab.1). Nevertheless, the seasonal evaluation of the parasite indices of copepods obtained from the same species revealed that the most important values were noted in summer (P=23,63%; A=0,61; I=2,61). Moreover, Carassius carassius provided high infestation rates and parasite infestation charges, respectively during spring (I=1.77; A=0.21) and summer (P=12.76%). The χ2 values showed the effect of season (𝜒𝜒2 obs = 18.833 > 𝜒𝜒2 0.05 = 6.251 ddl=3) and the size (𝜒𝜒2 obs =14,639 > 𝜒𝜒20,05 =4.605; ddl=2) on the parasite infestation of the two host species, since there was no effect due to the microhabitat and sex.
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    ACUTE TOXICITY OF AN INSECTICIDE (ACETAMIPRID) ON LUMBRICUS TERRESTRIS (LINNAEUS, 1758
    (2023-03-21) Berrouk, H; Necib, A; Hamaizia, Y; Chabi, C.,B; Hmaidia, K
    Earthworms are effective bio-indicators of biodiversity, soil quality and the environmental impact on cropping systems. Therefore, this study was conducted to assess the toxicological effect of Acetamiprid, a widely used insecticide by farmers in the region of Souk-Ahras (Algeria), on a biological model named Lumbricus terrestris using seven increasing concentrations 0, 5, 7, 9, 12.5, 25 and 50 mg/500 mg soil for four control periods; 24, 48, 72 and 96 hours. The physicochemical soil analysis indicated that the soil pH was strongly alkaline, and the pH water and pH KCl were respectively 8.52 and 7.72. The soil texture was sandy loam with a high level of organic matter (OM = 12.9%). In addition, the LC50 and LC90 values were remarkably decreased (LC50 = 12.4, 10, 7.30 and 6.69/500 mg soil; LC90 = 18.52, 14.21, 9.50, 9.15 mg/500 mg soil, corresponding respectively for each LC values to the four exposure periods 24, 48, 72 and 96 hours). Furthermore, no significant change was noticed in body weight and growth of earthworms treated with Acetamiprid at various concentrations. The mortality rate was concentration-dependent; increased with increasing concentration, and this was supported by the histopathological observations showing cellular alterations in the epidermis and muscle fibers. Additionally, treatment with Acetamiprid at high concentrations caused marked morpho-logical abnormalities in the earthworms as evidenced by the winding of the body, loss of pigmentation, cut of the posterior part, lesions, or bloody wounds