Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus?

One hundred and eighty juveniles of Oreochromis niloticus with a respective smean total length and weight of 7.30 ± 0.5 cm and 7.05 ± 0.5 g and 180 fry of Clarias gariepinus with a mean total length and weight of 14.90 ± 0.1 cm and 32.10 ± 0.5 g were separately cultured in 3 replicates in 18 plastic tanks (1 × 1 × 0.5 m; 200 L), 9 for O. niloticus and 9 for C. gariepinus, for photoperiods of 24 L: 0 D, 0 L: 24 D, and 12 L: 12 D for 13 weeks. Mortality and welfare impairment were evaluated daily. Mortality was significantly higher (P < 0.05) for the 0 L: 24 D photoperiod among O. niloticus and significantly higher (P < 0.05) for the 24 L: 0 D photoperiod among C. gariepinus. In general, mortality was significantly higher (P < 0.05) among O. niloticus than in C. gariepinus, with mortality being very high in the first 5 weeks of culture in the 2 species in all 3 photoperiods. Mortality was probably due to stress in the tanks arising from poor acclimatization to the environmental conditions, feeding inhibition, cannibalism, and maladjustment to the light/dark rhythmic cycle. The 0 L: 24 D photoperiod had a profound effect on the welfare of the juveniles of O. niloticus, and 24 L: 0 D compromised the welfare of the juveniles of C. gariepinus, as shown by the nonintrusive welfare indicators. The 2 unfavorable photoperiods manifested in stress conditions that caused injuries and affected swimming activity, behavior, coloration, and growth. If welfare challenges arising from photoperiodism are taken into account during culture of the species with photoperiodic manipulation, the species' mortality will be decreased and the farmer's profits will increase.

Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus?

One hundred and eighty juveniles of Oreochromis niloticus with a respective smean total length and weight of 7.30 ± 0.5 cm and 7.05 ± 0.5 g and 180 fry of Clarias gariepinus with a mean total length and weight of 14.90 ± 0.1 cm and 32.10 ± 0.5 g were separately cultured in 3 replicates in 18 plastic tanks (1 × 1 × 0.5 m; 200 L), 9 for O. niloticus and 9 for C. gariepinus, for photoperiods of 24 L: 0 D, 0 L: 24 D, and 12 L: 12 D for 13 weeks. Mortality and welfare impairment were evaluated daily. Mortality was significantly higher (P < 0.05) for the 0 L: 24 D photoperiod among O. niloticus and significantly higher (P < 0.05) for the 24 L: 0 D photoperiod among C. gariepinus. In general, mortality was significantly higher (P < 0.05) among O. niloticus than in C. gariepinus, with mortality being very high in the first 5 weeks of culture in the 2 species in all 3 photoperiods. Mortality was probably due to stress in the tanks arising from poor acclimatization to the environmental conditions, feeding inhibition, cannibalism, and maladjustment to the light/dark rhythmic cycle. The 0 L: 24 D photoperiod had a profound effect on the welfare of the juveniles of O. niloticus, and 24 L: 0 D compromised the welfare of the juveniles of C. gariepinus, as shown by the nonintrusive welfare indicators. The 2 unfavorable photoperiods manifested in stress conditions that caused injuries and affected swimming activity, behavior, coloration, and growth. If welfare challenges arising from photoperiodism are taken into account during culture of the species with photoperiodic manipulation, the species' mortality will be decreased and the farmer's profits will increase.

Kaynakça

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Kaynak Göster

Bibtex @ { tbtkzoology152886, journal = {Turkish Journal of Zoology}, issn = {1300-0179}, eissn = {1303-6114}, address = {}, publisher = {TÜBİTAK}, year = {2014}, volume = {38}, pages = {466 - 470}, doi = {10.3906/vet-1309-21}, title = {Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus?}, key = {cite}, author = {Mustapha, Moshood Keke and Oladokun, Olatoyosi Taofeek and Salman, Mubarak Mayowa and Adenıyı, Idris Adewale and Ojo, Dele} }
APA Mustapha, M , Oladokun, O , Salman, M , Adenıyı, I , Ojo, D . (2014). Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus? . Turkish Journal of Zoology , 38 (4) , 466-470 . DOI: 10.3906/vet-1309-21
MLA Mustapha, M , Oladokun, O , Salman, M , Adenıyı, I , Ojo, D . "Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus?" . Turkish Journal of Zoology 38 (2014 ): 466-470 <https://dergipark.org.tr/tr/pub/tbtkzoology/issue/12602/152886>
Chicago Mustapha, M , Oladokun, O , Salman, M , Adenıyı, I , Ojo, D . "Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus?". Turkish Journal of Zoology 38 (2014 ): 466-470
RIS TY - JOUR T1 - Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus? AU - Moshood Keke Mustapha , Olatoyosi Taofeek Oladokun , Mubarak Mayowa Salman , Idris Adewale Adenıyı , Dele Ojo Y1 - 2014 PY - 2014 N1 - doi: 10.3906/vet-1309-21 DO - 10.3906/vet-1309-21 T2 - Turkish Journal of Zoology JF - Journal JO - JOR SP - 466 EP - 470 VL - 38 IS - 4 SN - 1300-0179-1303-6114 M3 - doi: 10.3906/vet-1309-21 UR - https://doi.org/10.3906/vet-1309-21 Y2 - 2021 ER -
EndNote %0 Turkish Journal of Zoology Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus? %A Moshood Keke Mustapha , Olatoyosi Taofeek Oladokun , Mubarak Mayowa Salman , Idris Adewale Adenıyı , Dele Ojo %T Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus? %D 2014 %J Turkish Journal of Zoology %P 1300-0179-1303-6114 %V 38 %N 4 %R doi: 10.3906/vet-1309-21 %U 10.3906/vet-1309-21
ISNAD Mustapha, Moshood Keke , Oladokun, Olatoyosi Taofeek , Salman, Mubarak Mayowa , Adenıyı, Idris Adewale , Ojo, Dele . "Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus?". Turkish Journal of Zoology 38 / 4 (Mayıs 2014): 466-470 . https://doi.org/10.3906/vet-1309-21
AMA Mustapha M , Oladokun O , Salman M , Adenıyı I , Ojo D . Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus?. Turkish Journal of Zoology. 2014; 38(4): 466-470.
Vancouver Mustapha M , Oladokun O , Salman M , Adenıyı I , Ojo D . Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus?. Turkish Journal of Zoology. 2014; 38(4): 466-470.
IEEE M. Mustapha , O. Oladokun , M. Salman , I. Adenıyı ve D. Ojo , "Does light duration (photoperiod) have an effect on the mortality and welfare of cultured Oreochromis niloticus and Clarias gariepinus?", Turkish Journal of Zoology, c. 38, sayı. 4, ss. 466-470, May. 2014, doi:10.3906/vet-1309-21

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