Variation of lymphoid activity in the sp
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Ragnar Fänge; Bengt Silverin
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Article
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1985
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John Wiley and Sons
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English
⚖ 702 KB
The size and microscopic structure of the spleen of the migratory pied flycatcher (Ficedula hypoleuca) show marked changes during the reproductive cycle. Upon the spring return to their northern breeding sites, the birds have a small spleen with little lymphoid activity and a poorly developed red pu