Melanomacrophage centers aggregation in P. lineatus spleen as bio–indicator of environmental change

Abstract

ObjectiveTo monitor the water quality parameters and climatic impact on the health condition of the fish through pathology study of Marine catfish spleen using Melano-macrophage centers (MMCs) aggregation as a biomarker Marine catfishes along the parangipettai coast of Tamil Nadu. MethodsReplicate samples were done for all the seasons along the coast. Condition factor (K) and Histopathology technique, were used to evaluate the condition. ResultsThe result revealed the Condition factor (K) of fish was minimum in winter 1.0874 and maximum in summer 1.6726. Histology show the number of MMCs aggregation in spleen 59.5 ±8.3 MMCs/mm2 was observed in at post monsoon and 2-5 MMCs/mm2 in summer. Anova shows significantly different at P<0.05. The MMCs aggregation excited 30/mm2 when the water temperature is below 22°C and reaches maximum at temperatures of below 20 °C. The MMCs were correlated with water temperature shows positive correlation mean drop in water temperature may also reason for MMCs aggregation in spleen. ConclusionThe rise in temperature causes effect in health of the fish which was indicated in condition factor and MMCs aggregation. Animals are vulnerable to disease due to lowering of temperature and other environmental conditions. The MMCs aggregation can be used as bio–indicators for environmental.