Mansar wetland (winter monomictic) is rain fed . Lake was stocked with Cyprinus carpio communis & Cyprinus carpio specularis, after mass mortality of local trash fish, in February 1997. Presently , in winter, selective mortality of adult exotic carps only, weighing about 1 kg, seen during late Dec (2014) to early Feb (2015). Fish mortality was high in the month of January (Generally 5-21 dead fishes seen during different visits). Among these, mortality percentage of Cyprinus carpio communis and Cyprinus carpio specularis was about 90% and 10%, respectively. Anybody who is worked or working on fish mortality (specially Carp) . Please suggest me the links or papers for sorting out the main reasons for this selective fish mortality. I have pics also, if any body wants to see I will send.
what are the other reasons, besides the low DO in the water body.
every word, suggestion and information counts
Fish mortality is also related to type and density of phytoplankton. HAB species cause direct mortality.