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The aim of this paper is to comprehensively investigate and analyze the ecological dynamics of the Al-Chibayish Marsh. The study focuses on key environmental factors, aims to gain insight into the diversity and abundance of fish populations within the marsh, identifies dominant fish families, and assesses monthly changes in species composition. Two locations were chosen from among the Al-Chibayish marshes for this study, and three water samples were collected every month at every site, starting from March 2020 to February 2021. The mean water temperature recorded was 23.66 °C, while the salinity content exhibited variation over the study period. In July, the salinity content measured 4.34 g/l. Moreover, the pH ranged from 7.4 to 8.5. Dissolved oxygen levels exhibited seasonal variation, with an average value of 7.65 mg/l. The mean alkalinity value was 155.25 mg/l. Planiliza abu is the predominant species in terms of relative abundance, constituting 25.99 % of the total catch. Its percentages varied from 12.13 % in May to 46.74 % in December, with Alburnus sellal accounting for 19.07 % of the catch, with variations between 5.10 % in May and 30.99 % in June. Oreochromis aureus comprised 15.98 % of the total and fluctuated from 11.17 % in March to 20.27 % in January. Other notable species include Carassius auratus (13.10 %), Coptodon zillii (10.49 %), and Carasobarbus luteus (3.80 %). The H index exhibited variation over time, with values ranging from 1.25 in March to a peak of 2.99 in October. On the other hand, the J index also displayed temporal variability, with values ranging from 0.65 in April to 0.86 in August, while the D index showed changes as well, with values differing from 1.66 in March to 3.79 in January. Finally, based on these data, the ecosystem in the study area can be considered a fragile system.
Abdullah et al. (Mon,) studied this question.