Tegillarca

Abstract: Summary This study investigated accumulation of Vibrio parahaemolyticus in granulated ark shell clam (Tegillarca granosas) exposed to contaminated water and survival of V. parahaemolyticus in the clams during cold storage and heating processes. Vibrio parahaemolyticus could be accumulated in clams to a level similar to that of contaminated water within 12 h of exposure of clams to contaminated water at temperatures between 9 and 33 °C. Keeping clams stored at 5 and 0 °C for 10 days resulted in 1.98 and 2.32 log MPN g−1 reductions of V. parahaemolyticus, respectively, in the clams. Frozen storage at −18 °C for 15 days or at −30 °C for 30 days were capable of reducing V. parahaemolyticus from 4.05 log MPN g−1 to non-detectable levels (< 3 MPN g−1). A heating process in hot water at 80 °C or higher for 1 min also reduced V. parahaemolyticus in the clams to non-detectable levels.

Abstract: The blood clam Tegillarca (Anadara) rhombea is one of the important bivalves that show the presence of haemoglobin in its blood as against haemocyanin that is present in other bivalves. The haematological characteristics of this clam found along the south west coast of Maharashtra, India were studied from February 2014 to March 2015, excluding June-July 2015 due to heavy monsoon, in randomly selected specimens. The blood showed the presence of red blood corpuscles with round nucleus, white blood corpuscles with kidney bean shaped nucleus and non-nucleated platelets. The average count of RBCs was 1.76 X 109 per ml, WBCs 4.87 X 106 per ml. and platelets were 66 X 108 per µl. Haemoglobin (Hb) was found in the range of 2.03 to 8.87 gdL-1 and seen to be increasing with size. The general trend in the relationship between blood parameters and body size is that the bigger the animal, the higher the values of its haematological parameters.