The Impact of Spent Mushroom Compost and Fertilizer on Esophagus Histological Indices of Some Cultured Warm Water Species

We investigated the impact of button mushroom compost and fertilizer on tissues structure of four cultured warm water species at Shahid Ahmadian Khorramshahr, Khuzestan Province, and southern Iran. Juveniles with an average weight of 69. 60 ± 1. 28 gr for two months in six pools with button mushroom compost and fertilizers in warm water fish culture were fed. During breeding, treatment groups and control were fed by button mushroom compost and chemical fertilizer. At the end of the stipulated time and biometrics, 5 mm tissue samples removed from the middle part of the esophagus after tissue preparing sections staining with (H & E), were studied using light microscope equipped with Dinolite lens. Number of goblet cells and thickness of epithelium of the esophagus in the treatment group were increased compared to the control group in silver carp and big head species. However, in common carp and grass carp, it was unemployed. Moreover, thickness of the muscular layer of the esophagus in four species in treatment than the control group was more of significant difference (P<0. 05).