Serial sections prepared from 0. 5 to 30 days posthatch (DPH) larvae and fry
Thunnus east (Temminck Schlegel 1844), stained with hematoxylin-eosin and examined by light microscopy for the development of immune body. At the beginning of the kidneys is present at 0. 5dph, undifferentiated stem cells began to appear on 2dph, and 7dph random small lasix 100 mg lymphocytes were present. Thymus was first evident in 5dph, located on the fourth gill arch, small lymphocytes appeared to 7dph, and 15dph foreign thymocytic zone and inner zone of epithelioid seen. Spleen progenitor present at 2dph, located near the intestines, and it consisted of 12dph mass sinusoids filled with red blood cells remained mainly erythroid throughout the studied period. These results show that the development of the immune system in this species is premature in comparison with other marine teleost fish. .
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