A Comparative Study on the Water Quality of Two Nilotic Canals in the Delta of Egypt

Effect of climate change on growth and reproduction of Nile tilapia (Oreochromis niloticus, L.) from Bahr Shebeen Canal, Delta of Egypt.

“…Consequently, spawning of O. niloticus, in this study, is predicted to extend from February to September. Khallaf et al (2016b) reported similar results, since GSI of O. niloticus of BSC peaked in February, April, and September. The seasonal GSI for males ranged between 0.18 to 0.34 and peaked in winter and summer, while GSI of females ranged between 0.98 to 1.93 and peaked in spring only, this may explain the low condition of females in spring.…”

“…In general, when there will be sexual activity, the condition coefficient of fish is higher preparing for the subsequent event. Khallaf et al (2016b) revealed that O. niloticus of BSC had the highest values of K during November, April and July only. These changes may be attributed to the change of duration of the study and the variations of water physicochemical parameters.…”

A comparative biological study on Oreochromis niloticus from two Nilotic Canals in the Delta of Egypt

“…Bahr Shebeen Canal (BSC) ( Fig. 1) is an irrigation canal with a depth of 3-5 meters and about 30 m wide, and extends about 80 kms through three different governorates in the Delta of Egypt (Khallaf and Alne-na-ei, 1987;Khallaf et al, 2016). It is surrounded by two major cities, various villages, and cultivable lands, while shore plants are rare due to human interference, especially in town's vicinity because of shore protection works, during water closure in winter (15 January to 15 February), no submerged plants are noticed.…”

“…Although BHC and KHC are considered canals belonging to the River Nile system, but KHC receives agricultural drainage from the surrounding fields, illegal domestic sewage effluents from the surrounding villages, and industrial wastes from the city of Quesna, besides the factory of refuse recycling at Sharanis village. Each channel is considered a semi-independent ecosystem (Khallaf et al, 2016).…”

“…The growth of fish is responsive to various environmental factors, such as physico-chemical factors and fishing (Ricker, 1975;Khallaf et al, 2016). In this respect, less polluted Bahr She been (BSC), and polluted Khadraweya (KHC) Nilotic canals represent a challenge to research and assess each canal condition on fish.…”