. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ACTIVITY RHYTHMS IN BATS 19 correction. In both instances nocturnality was established, but, as in other species, the pattern of adjustment depended upon the relationship of light to the activity of the animal (see DeCoursey, 1961. 1963 for a discussion of this point). Noc- turnal activity has also been noted for two other species of bats under laboratory conditions (Griffin and "Welsh, 1937; Kowalski, 1955). The demonstration of rhythmic activity deviating slightly from 24 hours in cycle length, for bats in a constant
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ACTIVITY RHYTHMS IN BATS 19 correction. In both instances nocturnality was established, but, as in other species, the pattern of adjustment depended upon the relationship of light to the activity of the animal (see DeCoursey, 1961. 1963 for a discussion of this point). Noc- turnal activity has also been noted for two other species of bats under laboratory conditions (Griffin and "Welsh, 1937; Kowalski, 1955). The demonstration of rhythmic activity deviating slightly from 24 hours in cycle length, for bats in a constant environment, and the subsequent locking of the phase in an L: D regime was considered conclusive evidence for regulation of activity by both endogenous and exogenous factors. Whether cyclic factors other than light are significant has not yet been extensively investigated for bats. Griffin and. FIGURE 4. Cutaway diagram of the Wendelsheim loft. Single lines mark flight routes from roosting areas in Rooms 1 or 4 to outside of church, with broken line for that part of route not visible in diagram. See text. Welsh (1937) suggest that feeding clues may be important for some individuals, in the absence of light clues, but Kowalski (1955) found no evidence for such a conclusion. As a consequence of the above experiments, the question arose as to the manner in which the bats detected the environmental changes to which they would eventually synchronize their activity. In the second series of experiments, the three horseshoe bats were placed in the artificial cave room for several months with room light on at midnight and off at noon. Preliminary observations revealed that the bats hung. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Wo
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
