1. TEMPORAL VARIATIONS IN ABUNDANCE AND BIOMASS OF FISH SPECIES INHABITING THE K’SOB RESERVOIR (EASTERN OF ALGERIA). Authors: FATEH MIMECHE, FRANCISCO JOSÉ OLIVA-PATERNA.2. DIVERSITY OF ENTOMOFAUNA ASSOCIATED WITH GREENHOUSE-GROWN TOMATOES IN ALGIERS (NORTH ALGERIA). Authors: FATIHA DJEBARA, ABDELMADJID BENZAHRA, FATEH MIMECHE, LOUNES SAHARAOUI.3. EFFECTS OF VEGETATION AND WATER SEASONAL VARIATION ON HABITAT USE OF HERONS (AVES, ARDEIDAE) IN TONGA LAKE (NORTH-EAST ALGERIA). Authors: SOUMIA DJAMAI, FATEH MIMECHE, ETTAYIB BENSACI, AHLAM CHETTIBI.4. SURFACE WATER QUALITY ASSESSMENT IN SEMI-ARID REGION (EL HODNA WATERSHED, ALGERIA) BASED ON WATER QUALITY INDEX (WQI). Authors: AMEL FERAHTIA, MOHAMMED TAHAR HALILAT, FATEH MIMECHE, ETTAYIB BENSACI.5. POPULATION DYNAMICS OF EUPHYLLURA OLIVINA COSTA, 1857 (PSYLLIDAE: HEMIPTERA) IN OLIVE TREES IN THE SEMI-ARID REGION OF DJELFA (ALGERIA). Authors: NASSIMA CHAABANE, SMAIL CHAFAA, FRAH NAAMA, YASSINE NOUIDJEM, FATEH MIMECHE.