Statistical analysis of frequencies and proportions of cytologically classified spermatogenic cells in the hermaphroditic snail<i>Lymnaea stagnalis.</i>2. Effects of copulation

Jong-Brink, Marijke de; Jager, J. C.; Jong, J. T.L.

doi:10.1080/01688170.1985.10510139

Cited by 2 publications

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References 8 publications

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“…If so, the detection of effects of external or internal (e.g. copulation [10]) factors on spermatogenesis will be hampered. Thus a study on diurnal variations seems necessary as a basis for further studies on spermatogenesis.…”

Section: Introductionmentioning

confidence: 98%

Statistical analysis of frequencies and proportions of cytologically classified spermatogenic cells in the hermaphroditic snailLymnaea stagnalis.1. A study of diurnal variations

Jong-Brink

Jager

Bolwerk

et al. 1985

International Journal of Invertebrate Reproduction and Developm

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Diurnal vanattons in spermatogenesis in the hermaphroditic snail Lymnaea stagnalis were studied by counting Sertoli cells classified according to their developmental stage (I-IV). The levels of the frequencies of these stages were studied in a field population of non-copulating snails during a 24 h period. The results were extensively analysed with statistical methods.Non-copulating snails sampled at the same time during a 24 h period appeared to be homogeneous with respect to the frequency distributions of Sertoli cells over the distinguished stages, except for the snails sampled at 5.00 a.m. This inhomogeneity coincided with lowest values or changes of environmental factors measured. The relative frequencies of stage III ('ripe' spermatids) showed a significant fluctuating pattern, whereas those of stage IV (spermiation) remained at a very constant level.

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Section: Introductionmentioning

confidence: 98%

Statistical analysis of frequencies and proportions of cytologically classified spermatogenic cells in the hermaphroditic snailLymnaea stagnalis.1. A study of diurnal variations

Jong-Brink

Jager

Bolwerk

et al. 1985

International Journal of Invertebrate Reproduction and Developm

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Investimento na função masculina em Biomphalaria tenagophila (ORBIGNY) (MOLLUSCA, PLANORBIDAE) avaliado pelo número de espermatozóides

Monteiro

Kawano

1998

Rev. Bras. Biol.

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Investment in male function of Biomphalaria tenagophila (ORBIGNY) (MOLLUSCA, PLANORBIDAE) estimated by spermatozoa numbersBiomphalaria tenagophila is a simultaneous hermaphrodite whose male function investment was estimated by counting spermatozoa from ovotestis and seminal vesicle, under different experimental conditions during the copulation process. As a new technique, spermatozoa were separated in a detergent solution. In all experimental conditions the seminal vesicle contained at least twice as many spermatozoa as the ovotestis to the order of a hundred thousand in ovotestis compared with three or four hundred thousands in the seminal vesicle. There is evidence that the spermatozoa transferred in the copulation process originate from the donnor's seminal vesicle, and the balance of the number of spermatozoa in the seminal vesicle was restored in less than 24 hours.Key words: Biomphalaria tenagophila, mollusca, spermatozoa, numbers, couting. RESUMOBiomphalaria tenagophila é um hermafrodita simultâneo cujo investimento na função masculina foi avaliado pela contagem de espermatozóides do ovoteste e da vesícula seminal, sob diferentes condições experimentais, durante o processo de cópula. Foi criada uma nova técnica para contar espermatozóides separados em uma solução de alquilbenzeno sulfonato de sódio. Em todas as condições experimentais, a vesícula seminal teve mais do dobro de espermatozóides do ovoteste: da ordem de uma centena de milhar para três ou quatro centenas de milhares. Há evidências de que os espermatozóides transferidos no processo de cópula procederam da vesícula seminal do doador e que o equilíbrio do número de espermatozóides na vesícula seminal era restabelecido em menos de 24 horas.

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Statistical analysis of frequencies and proportions of cytologically classified spermatogenic cells in the hermaphroditic snailLymnaea stagnalis.2. Effects of copulation

Cited by 2 publications

References 8 publications

Statistical analysis of frequencies and proportions of cytologically classified spermatogenic cells in the hermaphroditic snailLymnaea stagnalis.1. A study of diurnal variations

Statistical analysis of frequencies and proportions of cytologically classified spermatogenic cells in the hermaphroditic snailLymnaea stagnalis.1. A study of diurnal variations

Investimento na função masculina em Biomphalaria tenagophila (ORBIGNY) (MOLLUSCA, PLANORBIDAE) avaliado pelo número de espermatozóides

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