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Author Haim, A.; Heth, G.; Pratt, H.; Nevo, E.
Title Photoperiodic effects on thermoregulation in a 'blind' subterranean mammal Type Journal Article
Year 1983 Publication J Exp Biol Abbreviated Journal
Volume 107 Issue Pages 59-64
Keywords Animals
Abstract Thermoregulatory responses to changes in photoperiod were studied in the ‘blind’ mole rat Spalax ehrenbergi (Nehring). Acclimation of cold-sensitive individuals to short photoperiod (8L:16D) at an ambient temperature (Ta) of 22 degrees C increased their thermoregulatory capacity in cold conditions, when compared to individuals which were acclimated to a photoperiod of 12L:12D at the same Ta. Acclimation of cold-resistant individuals to Ta = 17 degrees C but with a photoperiod of 16L:8D caused a decrease in thermoregulatory capacity. Evaluation of the visual pathway through the visual-evoked potentials showed that the mole rat does not respond to flash stimuli and can thus be considered to be effectively blind.
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Call Number LoNNe @ christopher.kyba @ Serial 422
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Author Hoffmann, K.
Title Photoperiod, Pineal, Melatonin and Reproduction in Hamsters Type Journal Article
Year 1979 Publication Progress in Brain Research Abbreviated Journal
Volume 52 Issue Pages 397–415
Keywords Animals
Abstract This chapter discusses the experiments done on male hamsters. It should be noted, however, that corresponding results have been obtained in females in nearly all cases, regardless of whether photoperiodic effects, the results after pineal manipulations or after application of melatonin are considered. Many mammalian species show a marked annual cycle of gonadal and other functions. In a number of cases it has been shown that the photoperiod, that is, the length of the daily light cycle and its changes, are involved in the regulation of this cycle. The pineal has been shown to participate in the transduction of photoperiodic effects of short photoperiods leading to regression and also of long photoperiods stimulating recrudescence. The latter effect is not only a suppression of antigonadotrophic effects from the pineal, but a positive stimulation. The exact role of melatonin in the photoperiodic mechanism and its site of action are still unclear. Strong effects of melatonin application have been found in photoperiodic mammals. Recent experiments suggest that not only the amount of melatonin, but its pattern of synthesis and release may be important in the conveyance of photoperiodic effects. No support for the assumption that the site of action of melatonin is the pineal itself has been found in experiments with pinealectomized animals.
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Call Number LoNNe @ christopher.kyba @ Serial 424
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Author McFarlane, R.W.
Title Disorientation of loggerhead hatchlings by artificial road lighting Type Journal Article
Year 1963 Publication Copeia Abbreviated Journal
Volume 1963 Issue 1 Pages 153
Keywords Animals
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Call Number LoNNe @ christopher.kyba @ Serial 427
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Author Howell, J.C.; Laskey, A.R.; Tanner, J.T.
Title Bird Mortality at Airport Ceilometers Type Journal Article
Year 1954 Publication The Wilson Bulletin Abbreviated Journal
Volume 66 Issue 3 Pages 207-215
Keywords Animals
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Call Number LoNNe @ christopher.kyba @ Serial 430
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Author Rowan, W.
Title Relation of Light to Bird Migration and Developmental Changes. Type Journal Article
Year 1925 Publication Nature Abbreviated Journal
Volume 115 Issue Pages 494-495
Keywords Animals
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Call Number LoNNe @ christopher.kyba @ Serial 431
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