Auditory selectivity for the acoustic properties of conspecific mate-attracting signals in lower vertebrates and songbirds

Acoustic Properties of Artifical Larnyx Speech

NSSLHA Journal ◽

10.1044/nsshla_16_31 ◽

1988 ◽

Vol 16 ◽

pp. 31-39

Author(s):

Bethann Moffet ◽

Rebekah Pindzola

Keyword(s):

Acoustic Properties

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Acoustic properties of rare-earth alloys Tb0.27Dy0.73(Fe1-xMnx)1.9

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:19945151 ◽

1994 ◽

Vol 04 (C5) ◽

pp. C5-705-C5-708

Author(s):

V. PREOBRAZHENSKY ◽

I. DUBENKO ◽

N. ECONOMOV ◽

A. ZAIKIN

Keyword(s):

Rare Earth ◽

Acoustic Properties ◽

Rare Earth Alloys

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ACTION OF ENZYME DIGESTED PITUITARY GLANDS OF THE SKIPPER-FROG ON THE OVULATION OF THE SAME

Acta Endocrinologica ◽

10.1530/acta.0.xxxiii0255 ◽

1960 ◽

Vol XXXIII (II) ◽

pp. 255-260 ◽

Cited By ~ 3

Author(s):

L. S. Ramaswami ◽

A. B. Lakshman

Keyword(s):

Pituitary Gland ◽

Constant Temperature ◽

Constant Temperature Bath ◽

Predominant Role ◽

Lower Vertebrates ◽

Pituitary Glands ◽

Stimulating Factor

ABSTRACT By using enzymes, the gonadotrophic factors in the skipper-frog pituitary glands have been selectively inactivated or destroyed. By incubating a known number of pituitary gland homogenate with ptyalin in a constant temperature bath for 5–6 h the follicle-stimulating factor is inactivated; with trypsin or pepsin, the luteinizing factor is inactivated. Bioassay on gravid skipper-frogs indicate that the ptyalin digested homogenate brings about profuse spawning while the trypsin or pepsin digested homogenates do not. When a combination of ptyalin digested and trypsin digested homogenates is injected into fresh gravid skipper-frogs, poor spawning is brought about. These experiments show that the luteinizing factor alone brings about more profuse spawning than when it is combined with the follicle-stimulating factor. It is likely, therefore, that in the lower vertebrates the luteinizing factor of the pituitary gland plays a more predominant role. The exact proportions in which the different dosages for the control and test animals are administered are also tabulated.

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