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Ontogeny of immune system organs in northern bluefin tuna (Thunnus orientalis, Temminck and Schlegel 1844)
journal contribution
posted on 2023-05-16, 13:29 authored by Watts, M, Kato, K, Munday, BL, Burke, CMSerial sections, prepared from 0.5 to 30 days post-hatch (dph) larval and juvenile Thunnus orientalis (Temminck & Schlegel 1844), were stained with haematoxylin and eosin and examined by light microscopy for immune organ development. The early kidney was present at 0.5 dph, undifferentiated stem cells began to appear at 2 dph, and by 7 dph occasional small lymphocytes were present. The thymus was first obvious at 5 dph, located above the fourth branchial arch, small lymphocytes appeared at 7 dph, and by 15 dph an outer thymocytic zone and an inner epithelioid zone were visible. The progenitor spleen was present at 2 dph, located close to the gut, and by 12 dph it consisted of a mass of sinusoids filled with red blood cells, and remained mainly erythroid throughout the period studied. These results suggest that development of immune organs in this species is precocious relative to other marine teleosts.
History
Publication title
Aquaculture ResearchVolume
34Pagination
13-21ISSN
1355-557XDepartment/School
Institute for Marine and Antarctic StudiesPublisher
Blackwell Publishing LtdPlace of publication
Oxford, EnglandRepository Status
- Restricted