. Altitudinal ecology of Agama tuberculata Gray in the western Himalayas. Agama tuberculata; Agama tuberculata; Lizards; Altitude, Influence of. 24 UNIV. KANSAS MUS. NAT. HIST. MISC. No. 83. 1973 1974 Fig. 17. Growth records for low altitude female (circles) and unsexed (triangles) .4. tiiberciilata. Lines and symbols as in Fig. 14. 111 Agama caucasica examined in Russia. In- creased herbivory among larger individuals may be possible because they have the physical strength to adequately macerate large amounts of vegeta- tion (Sokol, 1967). Also, Pough (1973) and Troyer (1984) proposed th
. Altitudinal ecology of Agama tuberculata Gray in the western Himalayas. Agama tuberculata; Agama tuberculata; Lizards; Altitude, Influence of. 24 UNIV. KANSAS MUS. NAT. HIST. MISC. No. 83. 1973 1974 Fig. 17. Growth records for low altitude female (circles) and unsexed (triangles) .4. tiiberciilata. Lines and symbols as in Fig. 14. 111 Agama caucasica examined in Russia. In- creased herbivory among larger individuals may be possible because they have the physical strength to adequately macerate large amounts of vegeta- tion (Sokol, 1967). Also, Pough (1973) and Troyer (1984) proposed that the higher energy require- ment per body weight of small lizards is met by eating energy-rich insects, whereas adults find it difficult to catch active insects so they ingest more plant material which requires much less of an expenditure of energy to procure. Increasing her- bivory with increasing age has also been found in various iguanids; for example, Pefaurand Duellman (1980) noted it xnLiolaeniusninltlJonnisoi'ihc high Andes. Increase in the animal component of the did in the monsoons is to be expected because during that season a wide variety of insects are generally available. Also, some other taxa of invertebrates, such as millipedes and snails, are more active then. Spiders were taken in the same or smaller percent volume in the monsoons compared with other seasons. This may be a result of decreased abun- dance of spiders or the increased abundance of insects. Qualitative dietary differences in addition to the animal versus plant component are also evident between age classes. Hatchlings at high altitude had a much greater proportion of spiders in their diet than did older lizards during late November- early December. The greatly reduced availability of insects at this time of year may account for most of this difference. Studies of food habits inEumeces c'iirc'i>liis (Mount. 1963), Cnemidophorus hyperyf lints hcUlliii^i (Bostic. 1966). and Sceloporus uncliilatii
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Keywords: ., bookcentury1900, booksubjectaltitudeinfluenc, booksubjectlizards
