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Shourbela, Ramy, Tohamy, Hossam, El-Hawarry, Waleed. (1398). Induced spawning of African catfish (Clarias Gariepinus Burchell 1822) after pre-spawning prophylactic disinfection; the breeding performance and tissue histopathological alterations are under scope. سامانه مدیریت نشریات علمی, 19(1), 309-324. doi: 10.22092/ijfs.2018.115523
Ramy Shourbela; Hossam Tohamy; Waleed El-Hawarry. "Induced spawning of African catfish (Clarias Gariepinus Burchell 1822) after pre-spawning prophylactic disinfection; the breeding performance and tissue histopathological alterations are under scope". سامانه مدیریت نشریات علمی, 19, 1, 1398, 309-324. doi: 10.22092/ijfs.2018.115523
Shourbela, Ramy, Tohamy, Hossam, El-Hawarry, Waleed. (1398). 'Induced spawning of African catfish (Clarias Gariepinus Burchell 1822) after pre-spawning prophylactic disinfection; the breeding performance and tissue histopathological alterations are under scope', سامانه مدیریت نشریات علمی, 19(1), pp. 309-324. doi: 10.22092/ijfs.2018.115523
Shourbela, Ramy, Tohamy, Hossam, El-Hawarry, Waleed. Induced spawning of African catfish (Clarias Gariepinus Burchell 1822) after pre-spawning prophylactic disinfection; the breeding performance and tissue histopathological alterations are under scope. سامانه مدیریت نشریات علمی, 1398; 19(1): 309-324. doi: 10.22092/ijfs.2018.115523

Induced spawning of African catfish (Clarias Gariepinus Burchell 1822) after pre-spawning prophylactic disinfection; the breeding performance and tissue histopathological alterations are under scope

Iranian Journal of Fisheries Sciences
مقاله 14، دوره 19، شماره 1، فروردین 2020، صفحه 309-324    اصل مقاله (542.96 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22092/ijfs.2018.115523
نویسندگان
Ramy Shourbela1؛ Hossam Tohamy1؛ Waleed El-Hawarry* 2
1Lecturer
2Ass. Professor
چکیده
Adult African catfish (Clarias gariepinus) were used to investigate the effects of pre-spawning prophylactic disinfection during a seven days quarantine period on the breeding performance and the possible histopathological influences on C. gariepinus brooders. Based on broodfish sex; a total of 36 females were stocked into 6 tanks (6 females tank-1) and 18 males were stoked into other 6 tanks (3 males/tank) signifying three treated groups (T1: T3) of two replicates (6 females + 3 males / replicate). T1 was assigned as a control non-treated broodfish, whereas T2 broodfish was disinfected with formalin (FA) (15 ppm) for 6 h and T3 broodfish were disinfected with malachite green (MG) (1 ppm) for 45 minutes. Brooders treated with MG (T3) delivered lower egg numbers, lower hatching percent and high percentage of larval deformity. Additionally, pronounced histopathological lesions were observed in the liver, testis and ovaries of both the FA and MG- treated catfish that is to give a further explanation for the declined breeding performance of both groups. Herein, the pre-spawning disinfection of C. gariepinus during the quarantine period is not necessary especially when proper management, transportation and handling is to be followed. Nevertheless, if pre-spawning disinfection to be applied; the MG should not be prescribed for C. gariepinus broodfish unless no other cheap and much safer disinfectants rather than FA existed. But still, a future research is required to explore its possible negative effects on both reproductive efficiency and the prospected histopathological changes of broodfish being recovered from FA application.
کلیدواژه‌ها
Induced spawning؛ Clarias gariepinus؛ Pre-spawning quarantine؛ Prophylactic disinfection؛ Spawning performance؛ Tissue histopathology
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