@article{oai:ir.kagoshima-u.ac.jp:00007874, author = {NAKAMURA, Kaworu}, issue = {1}, journal = {鹿児島大学水産学部紀要=Memoirs of Faculty of Fisheries Kagoshima University}, month = {2016-10-28}, note = {The larval prawn Penaeus japonicus has been reported to experience mass mortality during its limited period of development, especially at such stages as early postlarvae. In this experiment, the lymphoid organ was detected histologically in th larvae and its differentiation process was observed from the basal area of the 2nd antenna. Its shape was a tubular body possessing a connective-tissue sheath and a central lumen, differing from the adult organ in its structure and distribution. A variation was recognized in its size during developmental stages of the larvae. By transcription of the histological sections of the organ and weighing those of copied figures, it was revealed that the size value was high at the mysis 3 and postlarva 1-3. Reversely, lower values were obtained at the stages of the postlarva 4 and 10. In relation to these changes in the size of the organ at each stage, its involvement in the resistance to diseases was suggested.}, pages = {215--220}, title = {Lymphoid Organ and Its Developmental Property of Larval Prawn Penaeus japonicus}, volume = {36}, year = {} }