Seasonal Variation in Aquatic Biota in Relation to Physico-Chemical Parameters of Sonmiani, Balochistan, Pakistan
Seasonal Variation in Aquatic Biota in Relation to Physico-Chemical Parameters of Sonmiani, Balochistan, Pakistan
Nasratullah Baloch1*, Naeem Tariq Narejo2, Hamida Narejo3, Muhammad Farooq Hassan4, Muhammad Hanif Chandio5, Faheem Saddar6, Dharti Shahnawaz Thebo7, Ghulam Abbas8 and Shahnaz Rashid8
ABSTRACT
Seasonal variation in phyto- and zooplankton (aquatic biota) in relation to physico-chemical parameters from Sonmiani Bay, Balochistan, Pakistan was studied from January to December 2016. For month-wise analysis of zoo- and phytoplankton was performed by using net of 25 µm mesh size. For the qualitative and computable examination of planktons, the 50 liters of bay water was strained and residue fixed with 5% formalin in sampling bottles. The 99 genera of both the planktons were recorded, which included 52 zoo- and 47 for phytoplankton from the experimental area. Among the zooplankton, Copepods were found to be rich 65% followed by Brachyuran zoa 15% while in case of phytoplankton genus Coscinodiscus were noted to be rich 60% followed by Rhizosolenia 15% during the whole duration of investigations. It reflects that the bay water was found to be rich with primary productivity. Vital physicochemical factor such as pH, temperature, salinity, dissolved oxygen, and transparency were taken into account twice in a month from sampling area during the whole period of research. The temperature found to be varied from 21-35.7oC, pH8.0-8.1, DO 3.57–5.0 mg/l, salinity 34.2-39.9 mg/l and transparency 38.5-53.0 µS/cm. Lastly it was resolved that the atmosphere of Sonmiani bay found to be supportive for the aquatic biota (zoo and phytoplankton) which in turn conducive for the rearing of commercial fish species in it.
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