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| Histological Observation of Ovary Development in Xenocypris microlepis |
| LIU Min,XIONG Bang-xi,L(U) Guang-jun |
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Abstract Annual changes in ovaries and oocyte development were histologically observed in Xenocypris microlepis collected monthly in Daoguanhe Reservoir, Hubei Province from Autumn 2007 to August 2008. The development of the ovary underwent six consequent stages while oocytes had five phases, with species specificity from phase Ⅲ. The ovary was under the developing stage before spawning in March. The spawn occurred from April to July, and peaked in May and June. In late July and August, the ovary was in a stage of degeneration after spawning, and then it returned to stageⅡin September and October. From November to February of the following year, the ovary aws in stage Ⅲin the winter. A histological observation of the oocyte development showed that the fish was in a successive process and female seemed to be able to spawn twice, even three times, in one spawning season.
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Received: 25 March 2010
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