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Seasonal anatomical variations in the testes of European pike, Esox lucius L.
Author(s) -
Hoffmann R.,
Wondrak P.,
Groth W.
Publication year - 1980
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1980.tb03727.x
Subject(s) - pike , esox , biology , spermatogenesis , stage (stratigraphy) , reproduction , fish <actinopterygii> , fishery , zoology , ecology , endocrinology , paleontology
The seasonal development of the testes in European pike was examined using wild fish and biopsies from pike housed in tanks. The size of the tubules and the different cell types were measured and their histological appearance described. Four stages of development can be distinguished during the annual cycle. They are: (I) the stage of rest from June to August; (II) the stage of development from September to November with intensive spermatogenesis; (III) the stage of maturity from December to March/April with spermatogenesis completed; and (IV) the post‐spawning stage from March to May.