Correlative cyclical changes in the hypophysis and gonads of necturus maculosus Rafinesque. I. The male

Aplington, H. W.

doi:10.1002/aja.1000700203

Am. J. Anat.

1942

DOI: 10.1002/aja.1000700203

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Correlative cyclical changes in the hypophysis and gonads of necturus maculosus Rafinesque. I. The male

H. W. Aplington

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1944

1968

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Cited by 16 publications

References 24 publications

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Seasonal cytological changes in the anterior hypophysis of the garter snake

Hartmann

1944

Am. J. Anat.

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FOUR TEXT FIQURES AND OXYE PLATE (TWELVE FlGURES)The present study was made in an attempt to determine the normal variations exhibited throughout the year by the cells of the pars distalis of the hypophysis of the male garter snake. The relative percentages of these cells were found to be considerably different at different seasons, and certain cytological changes accompanying the quhitative fluctuations were detectable. The possible relation between tbese seasonal changes and the male reproductive cycle is briefly considered, and mill be reported in detail in the future.From the literature that has accumulated in recent years as a result, of morphological, developmental, and experimental studies on the hypophyeis, the desirability of studying normal structural changes in the gland in relation to physiological phenomena of tho organism becomes increasingly important. An understanding of such normal variations in the anterior hypophysis is felt to be of value not only as an addition to the fund of basic information on the anterior hypophysis in general, but also as a basis for understanding and evaluating experimental work already reported, and as a reference point

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Seasonal cytological changes in the anterior hypophysis of the garter snake

Hartmann

1944

Am. J. Anat.

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Seasonal and sexual variation in the pituitary gland of Triturus viridescens

Dent

1961

Anat. Rec.

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Although the cyclic changes of the gonads (Humphrey, '26; Adams, '40) and the thyroid gland (Morgan and Fales, '42) have been followed carefully in Triturus viridescens, month-by-month examination of the pituitary gland has not been reported. Copeland ('43) and Kent ('45), however, have made detailed investigations of the general cytology of the pituitary in this animal and have given some consideration to its appearance during the different seasons of the year.The present study amplifies the results of the previous investigations of pituitary cytology in T. viridescens and describes variations in the numbers and form of the cell types of the pars distalis, particularly the globular basophil. Some of the information given herein has been Qited in abstract (Dent, '56). MATERIALS AND METHODSOver a period of two years specimens of Triturus (Diemyctylus) viridescens viridescens Rafinesque were collected between the 18th and 20th days of each month from a pond near Charlottesville, Virginia. The animals were brought immediately to the laboratory. Without delay the pituitary glands were exposed, fixed in situ with 9 parts of Susa solution plus one part saturated aqueous solution of picric acid (Halmi, '52), and removed. The immediate fixation of the glands seemed desirable since changes in endocrine glands are thought to result from keeping animals under laboratory conditions. Thyroid glands and gonads were also removed and fixed.The preserved glands were sectioned, the pituitaries at 4 p and the others at 10 p. The pituitary sections were stained

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Cellular changes in the pituitary of necturus following thyroidectomy

Aplington

1962

Anat. Rec.

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Correlative cyclical changes in the hypophysis and gonads of necturus maculosus Rafinesque. I. The male

Cited by 16 publications

References 24 publications

Seasonal cytological changes in the anterior hypophysis of the garter snake

Seasonal cytological changes in the anterior hypophysis of the garter snake

Seasonal and sexual variation in the pituitary gland of Triturus viridescens

Cellular changes in the pituitary of necturus following thyroidectomy

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