M. Saleem, J. Aftab, S. Kahkashan, N. A. Kalhoro, W. Ahmad


Diurnal (24 hours) observations of dissolved nutrients, Chlorophyll-a, water quality (salinity, dissolved oxygen, temperature, pH and suspended solidmatter) were recorded at one site in the Hajamro Creek of Indus Delta during the North East Monsoon period. The zoo- and phyto-plankton were recorded during low and high tides. Primary productivity was measured only during the day time. Dissolved nutrient concentration ranges were NH4 (1.81 µM -12.30 µM), NO3 (0.03 µM -1.48 µM), NO2 (0.04 µM -0.122 µM), PO4 (0.45 µM -1.69 µM), SiO3 (4.84 µM -24.49 µM) and averages were 6.41, 0.28, 0.055, 0.722, 12.12 µM respectively. The suspended load ranged from 36.0 mg/l to 87.8 mg/l, pH from 8.24 to 8.38, temperature from 18.73 oC to 22.37 oC and salinity from 35.995 ppt - 37.062 ppt. Higher Chlorophyll-a concentration was recorded during the high tide in daytime and its range was 0.45 µg/l - 1.69 µg/l while its average concentration was 1.94 µg/l. The moderate value of primary productivity was recorded to be (0.475 g C/m3 /day). Eleven groups of zooplankton were identified. Copepods were the main species which were abundant during high tide. Bivalve, fish eggs, crab and polychaete larvae were observed during low tide. The present study shows that high amounts of suspended solids, dissolved nutrients (phosphate, silicate, nitrate and ammonia) and relatively more salinity in sea water were recorded during low tide. Presence of adequate dissolved nutrients and high turbidity is probably restricting productivity in the Hajamro Creek.

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S. Wafar, A. G. Untawale and M. Wafar, Estuarine

Coastal and Shelf Science 44 (1997) 111.

A. A. Memon, Devastation of the Indus River

Delta. Proc. World Water & Environmental

Resources Congress, American Society of Civil

Engineers, Environmental and Water Resources

Institute, Anchorage, Alaska, May 14-19 (2005).

M. M. Rabbani, A. D. Razzaq and A.-ur- Rehman,

Effect of fish catch population dynamics of

unicellular algae in the Hajamro Creek, eds. S.

Quraishee, A. Farah, S. H. N. Rizvi, M. Y. Khan,

M. Moazzam and J. Ahmed. Proc. Fish. Policy and

Planning 17 (1986) 232.

P. J. Harrison, N. Khan, K. Yin, M. Saleem, N.

Bano, M. Nisa, S. I. Ahmed, S. H. N. Rizvi and F.

Azam, Mar. Ecol. Pro. Ser. 157 (1997) 13.

S. H. N. Rizvi, M. Saleem and J. Baquer,

Productivity of Gharo Creek in relation to its

fisheries potential. G. S. Quraishee, A. Farah, S. H.

N. Rizvi, M. Y. Khan, M. Moazzam and J. Ahmed.

(eds.). Proc. Fish. Policy and Planning 16 (1986)

M. Saleem and F. -ur-Rahim, Diurnal fluctuation of

nutrient flux in a polluted estuary, (eds.) M. F.

Thompson and N. Trimizi, Proc. Arabian Sea and

Living Mar. Res. and the Env. (1995) 681.

T. R. Parsons, Y. Maita and C. M. Lalli, A manual

of chemical and biological methods for seawater

analysis. Pergamon Press: Oxford, UK. ISBN 0-08-

-4.XIV, (1984)173.

F.A.O. Manual of methods in the aquatic

environment research, Part-1, Methods for

detection, measurement and monitoring of water

pollution. F.A.O Fisheries Technical Paper No. 137


A practical hand book of seawater analysis,

Bulletin 167 (2nd edit.). Fish. Res. Board of Canada

Ottawa, eds. D. J-Strickland and T.R. Parsons


K. Kathiresan, Intern. J. Mar. Sci. 2(10) (2012) 70.

K. Kathiresan, Hydrobiologia 430: (2000) 185.

(ed.) T. J. Pandian, Recent Advances in Indian

Aquatic Research.© 2000 Kluwer Academic

Publishers. Printed in the Netherlands. A review of

studies on Pichavaram Mangrove, Southeast India.

C. F D'Elia, K. L Webb and J. W. Porter, Bull. Mar.

Sci. 31 (1981) 903.

Jr. G. M Simmons. Mar. Ecol., Prog. Ser. 84 (1992)

C. M. Rutkowski, W. C. Burnett, R. Liverson and J.

P. Chanton, Estuaries 22 (4) (1999)1033.

D. R. Corbett, J. Chanton, W. Burnett, K. Dillon, C.

Rutkowski and J. W. Fourqurean, Limnol.

Oceanogr. 44 (4) (1999)1045.

R. A. Jahnke, C. R. Alexander and J. E. Kostka,

Estuar.Coast. Shelf Sci. 56 (2003) 641.

J. L. Bowen, K. D. Kroeger, G. Tomasky, W. J.

Pabich, M. L. Cole, R. H. Carmichael and I.

Valiela, Applied Geochemistry 22 (2007) 175.


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