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Khati Wyllia

  • Biodiversity Journal, 9 (4): 319-324

    Khati Wyllia, Bensafia Nabila, Ouali Kheiredine & Derbal Farid
    Sponges (Porifera) as bioindicator species of environmental stress from de Gulf of Annaba (Algeria)
    https://doi.org/10.31396/Biodiv.Jour.2018.9.4.319.324

    ABSTRACT
    The aim of the study was to determine seasonal variations of two biomarkers of oxidative stress, Glutathione (GSH) and Glutathione S-transferases (GSTs), in sponge Sarcotragus spinosulus Schmidt, 1862 (Porifera Irciniidae). The samples were collected during the four seasons in 2016– 2017 at two sites in the Gulf of Annaba (northeast of Algeria): Cape de Garde, which is some distance from any source of pollution, is considered a relatively clean site, while Alzon is a site exposed to various sources of industrial, urban and harbour pollution. The results show a significant seasonal decrease in GSH rate in Alzon compared with those at Cape de Garde. Moreover, GST activity increased significantly in Alzon relative to Cape de Garde site, with a maximum activity showed in autumn. This difference between those two sites was observed for all seasons, with more effect in spring and winter. The results obtained showed that under stressful conditions due to anthropogenic factors, some physiological processes of sponges can be affected. Thus, S. spinosulus appears to be a suitable sentinel species for the assessment of ecotoxicological risk in the Gulf of Annaba. Sponges present most of the characteristics researched in bioindicators of pollution and consequently have been proposed to constitute a ‘‘Sponge Watch Program’’.

  • Biodiversity Journal, 10 (4): 593-600

    Belhocine Karim, Gasmi Yousria & Khati Wyllia
    Influence of total length, sex and seasonal variations on hematological parameters in Cyprinus carpio (Linnaeus, 1758) (Pisces Cyprinidae), Lake Tonga (Algeria)
    https://doi.org/10.31396/Biodiv.Jour.2019.10.4.593.600

    ABSTRACT
    Hematological parameters are used as an essential tool to assess the health status of fish. This study aims to provide a background on hematology in Lake Tonga’s Cyprinus carpio (Linnaeus, 1758) (Pisces Cyprinidae) and to demonstrate the impact of seasonal variations, sex and size on hematology. The study was conducted throughout 2018 and involved 120 individuals sampled monthly and randomly. The specimens were weighed and measured. Blood samples were collected to determine hematocrit (Ht), hemoglobin (Hb), red (GR) and white (GB) blood cell count (Lym, Mon, Gra) and erythrocyte constants: mean blood cell volume (VGM), mean blood cell content (TGM), mean corpuscular hemoglobin concentration (CCMH). The results revealed that the majority of the parameters studied did not show significant differences in size classes, and the statistical comparison between the two sexes revealed significant differences in the values of GR, GB, Mon, Mon, Gra, Ht, Hb, TGM and CCMH. On the other hand, all the parameters studied varied significantly over the seasons.