TY - JOUR ID - TI - Fish Assemblage Structure in Al-Huwaizah marsh southern of Iraq after inscribed on the World Heritage List AU - Basim M. Hubain Al-Thahaibawi1 AU - Kadhim H. Younis2 AU - Ithar K.A.Al-Mayaly1 PY - 2019 VL - 60 IS - 7 SP - 1430 EP - 1441 JO - Iraqi Journal of Science المجلة العراقية للعلوم SN - 00672904 23121637 AB - The fish assemblage structure in Al-Huwaizah marsh, southern of Iraq wasassessed. Fish samples collected monthly by different fishing means from periodDecember 2017 to November 2018. A total of 28959 individual of fish belonging to9 families and 19 species were collected, 11 of them of native species and 8 of alienspecies. The numerical dominance index value (D3) of the highest three abundantspecies comprised 74.26% of the total fish caught, included Planiliza abu (Al-Keshny) 38.2% ; Coptodon zilli (Tilapia red abdomen) 29.41% and Carassiusauratus (Prussian carp) 6.65%. The total weight of fish caught 2,190,680 tan,highest weight 312,242kg achieved in July, while lowest weight 41,590 kg found inSeptember. The weight dominance index value (D3) of the highest three species inweight recorded 1,409,973 tan of the total weight of fish caught included C. zilli(Tilapia red abdomen) 659,994 kg , S. triostegus (Jerry fresh water) 495,784 kg andO. aureus (Blue tilapia) 245,195kg.The annual rate value for diversity, richness andevenness indices amounted 1.88, 1.75 and 0.64, respectively. Some of physical andchemical properties were studied such as water temperature which ranged from11.5°C in January to 31.02°C in August month, dissolved oxygen ranged from 2.24mg/l in September to 9.9mg/l in February, salinity varied from 1.37‰ in Novemberto 3.76‰ in September and pH which ranged from 7.4 in June to 8.15 in December.Jaccard Similarity Index (Ss%) was used to know the similarity degree between themonthly catch samples. Also associations between distribution of fish species andthe environmental variables were quantified by using canonical correspondenceanalysis (CCA(.

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