A histopathological description is given of the black gill disease in Kuruma prawn Penaeus japonicus. The inflammatory responses of P. japonieus against Fusarium solani are haemocytic infiltration, haemocytic encapsulation, melanization and collagen-like fihre deposition. These responses are more pronounced in lesions in the exoskeleton than in the gill lamellae.
. Atkinsiella hamanaensis sp. nov. a marine mastigomycete isolated from ova of the mangrove crab, Scylla serrata (Forsskål), is described and illustrated. The fungus grew over a temperature range of 15–32°C, with an optimum of 29–32°C. Its growth was observed in peptone‐yeast extract glucose broth containing 1–5% NaCl, with optimum growth at 2–3% NaCl concentration. At 6% or more NaCl concentration, growth was inhibited. Its pH tolerance ranged from 4 to 9.
From a stock culture of Cylindrotheca sp., non-motile colony-forming cells were observed and isolated. Colony-forming cells produced both single cells and colony-forming cells in liquid media, the rate of single cell production varied among clones. The single cells derived from colony-forming cells were also isolated, which were able to produce both colony-forming cells and single cells in liquid media. The cells derived from colony-forming cells never moved on the agar surface.
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