• Title/Summary/Keyword: 정자형성

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Histological Changes of Androgenic Gland According Reproductive Cycle in Macrobrachium nipponense (De Haan, 1849) (징거미새우, Macrobrachium nipponense 생식주기에 따른 Androgenic Gland의 조직학적 변화)

  • Kim Dae Hyun;Kang Jung Ha;Lee Jae Young;Jeong Jee Hyun;Kim Byung Ki;Han Chang Hee
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.35 no.3
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    • pp.253-258
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    • 2002

  • The androgenic gland secretes a hormone, androgenic gland hormone, which is believed to act on the differentiation of the primary, secondary, and behavioral sex characteristics in most malacostracan crustaceans. Based on the changes in gonado-somatic indexe and histological observation of testis and androgenic gland cell, testicular maturation and spermatogenesis of M. nipponense occurred early in summer (May to July), and generally spermatogenesis was absent in August. It could be, concluded that May to July is the period when adult males of this species are sexually active, and androgenic gland showed signs of increased secretory activity.

  • https://doi.org/10.5657/kfas.2002.35.3.253 인용 PDF KSCI

Morphological Measurement of the Spermatogenic Cells in the Korean Native Pheasant(Phasianus colchicus korpowi) with Image Analyser (영상분석기를 이용한 한국산 꿩의 정자발생세포들의 형태학적 계측)

  • 박영석;양홍현;김인식
    • Korean Journal of Animal Reproduction
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    • v.23 no.1
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    • pp.37-43
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    • 1999

  • The image analyser was used for the measurement of the morphological changes of the spermatogenic cells and seminiferous tubules in the pheasant during the breeding and non breeding season. 1. The seminiferous tubules were enlarged 2.57 times during the breeding season than during the non breeding season. Only Sertoli cells and spermatogonia in the seminiferous tubules can be found during the non breeding season. 2. There is no significantly difference in the ratio of nucleus area against that of cell size in the spermatogonium between breeding and non breeding season. The ratio of area was 28.71% and 29.11%, respectively. However, the enlargement of spermatogonium was noticed during the non breeding season. 3. The highest value of the ratio of the nucleus area against that of cell size among the germ cells was measured 37.40% in the pachytene phase of the spermatocyte during the breeding season. 4. The ratio of nucleus area against that of cell size in the spermatid was 22.53%.

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