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Author Bissonnette, T.H.
Title Modification of Mammalian Sexual Cycles Type Journal Article
Year (up) 1935 Publication Journal of Experimental Biology Abbreviated Journal
Volume 12 Issue Pages 315-320
Keywords Animals
Abstract 1. Cases are given in which female ferrets, already coming into, or in, oestrus as the result of artificially increased lighting in winter and spring, underwent regression or were retarded in their activation by reduction of either intensity or duration of daily illumination.

2. In some cases activation was resumed when light time or intensity was increased again.

3. These results are taken to indicate that, in female ferrets, any inherent rhythm or cycle of sexual activity is modified either naturally or artificially by changes of the cycles of duration and intensity of the light to which they are exposed daily, and so made to correspond in phases with the seasons, or changed therefrom. The rising daily illumination in spring and the falling one in late summer and autumn probably accelerate and retard the sexual activity of the female ferret, or accelerate the onset of anoestrus in late summer and autumn.

4. The data on modification of sexual cycles or activity in ferrets, so far obtained, are consistent with these conclusions.
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Notes Approved no
Call Number GFZ @ kyba @ Serial 2397
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Author Beebe, W.
Title Rediscovery of the Bermuda cahow Type Journal Article
Year (up) 1935 Publication Bulletin of the New York Zoological Society Abbreviated Journal
Volume 38 Issue Pages 187-190
Keywords Animals
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Call Number GFZ @ kyba @ Serial 2556
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Author Matzke, E. B.
Title The Effect of Street Lights in Delaying Leaf-Fall in Certain Trees Type Journal Article
Year (up) 1936 Publication American Journal of Botany Abbreviated Journal Amer. J. of Botany
Volume 23 Issue 6 Pages 446-452
Keywords Plants; trees; Carolina poplar; Populus canadensis; London plane; Platanus acerifolia; sycamore; Platanus occidentalis; crack willow; Salix fragilis; New York; New York City
Abstract Street lights in the City of New York cause a retention of the leaves of certain trees: Carolina poplar (Populus canadensis), London plane (Platanus acerifolia), sycamore (Platanus occidentalis), and crack willow (Salix fragilis). Illuminated portions of a tree retain their leaves; shaded portions of the same tree do not. One side of a tree, or the lower part, may thus have numerous leaves, while the other side, and the upper part, may be entirely devoid of foliage. A relatively weak light, at a distance of as much as 45 feet from the tip of the nearest branch, may cause retention of numerous leaves. Light intensity as low as 1 foot candle, or less, may be effective. Some leaves may be retained at least a month, others more than that, beyond the normal season. The orientation of the light with respect to the tree – i.e., north, east, south, and west – is not significant. In Populus canadensis all of the leaves ultimately fall, abscission apparently taking place at the base of the petiole. In Platanus acerifolia and Platanus occidentalis some of the leaves are retained until killed by low temperature; then some of them break off above the base of the petiole. Leaves of the Populus and Platanus species discussed remain green unusually long when receiving additional illumination. Leaves of these same trees do not emerge from the buds earlier in the spring as a result of the additional illumination.
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Publisher JSTOR Place of Publication Editor
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ISSN 0002-9122 ISBN Medium
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Notes Approved no
Call Number IDA @ john @ Serial 1394
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Author Bissonnette, T.H.
Title Modification of mammalian sexual cycles. V. The avenue of reception of sexually stimulating light Type Journal Article
Year (up) 1936 Publication Journal of Comparative Psychology Abbreviated Journal Journal of Comparative Psychology
Volume 22 Issue 1 Pages 93-103
Keywords Animals
Abstract The author subjected female ferrets of controlled previous light and sexual history to added nightly lighting (1) without hoods, (2) with hoods which exposed the eyes through holes, and (3) with heads covered by light-tight hoods. The conditions of decreased light on the eyes were associated with delayed oestrus. “The facts indicate that the eyes are the receptors for photo-periodic sexual stimulation in ferrets, mediated by the anterior hypophysis, and that closing their eyes in sleep does not prevent the activation.”
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ISSN 0093-4127 ISBN Medium
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Notes Approved no
Call Number GFZ @ kyba @ Serial 2400
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Author Hallock, H.C.
Title Recent Developments in the Use of Electric Light Traps to Catch the Asiatic Garden Beetle Type Journal Article
Year (up) 1936 Publication Journal of the New York Entomological Society Abbreviated Journal
Volume 44 Issue 4 Pages 261-279
Keywords Animals
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Notes Approved no
Call Number GFZ @ kyba @ Serial 2401
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