Sediment and water characteristics of selected prawn farming sites at Cochinudduring premonsoon months

摘要

This paper deals with the studies on sediment and water characteristics of selected shrimpudfarming ponds located at Puthuvyppu and Valappu villages of Vypeen in the vicinity ofudCochin carried out during premonsoon period (March-May 2001). Areawise distribution ofudsediment and water characteristics revealed that smaller and medium sized ponds wereudrelatively more fertile than the larger sized ponds. Overall mean values of nutrients in sedimentudand water indicated that ponds at Puthuvyppu village (with high tidal influence) were relativelyudmore fertile than those ponds at Valappu. TSS and primary productivity values also showedudthe same trend. Highly significant positive correlation was observed between clay and silt,udorganic carbon and available potassium, nitrite-N in sediment and water, salinity and TSS andudwater pH and dissolved oxygen.