Relative mass of litter was less for the giant gartersnake than for the Butler's gartersnake (Thamnophis
butleri; mean = 0.562 g; Ford and Killebrew, 1983) and black-necked gartersnake (Thamnophis
cyrtopsis; 0.614 g; Vitt, 1975), but similar to many other gartersnakes (range, 0.200-0.277 g; seigel and Fitch, 1984; Larsen et al., 1993).
Similarly, exposure of male garter snakes (Thamnophis
sirtalis) to females of different sizes causes them to alter their courtship criteria (Shine et al., 2006).
Five of these, i.e., common kingsnake (Lampropeltis getula), eastern racer (Coluber constrictor), eastern rat snake (Elaphe obsoleta), western ribbon snake (Thamnophis
proximus) and copperhead (Agkistrodon contortrix), are considered to be generalists in their habitat and/or their prey preferences (Conant & Collins 1998).
cadaverina) and several mesophilic reptiles (e.g., two-striped garter snake Thamnophis
hammondii, California striped racer Masticophis lateralis) that are fairly widespread in the Californian Province, have widely fragmented distributions associated with palm oases to the south in the central peninsula (Grismer, 2002).
Differential predation on metamorphic anurans by garter snakes (Thamnophis
): social behavior as a possible defense.
Three species, the western cottonmouth (Agkistrodon piscivorus leucostoma), the eastern yellow-bellied racer (Coluber constrictor flaviventris) and the Texas garter snake (Thamnophis
sirtalis annectans), accounted for 58% of all individuals captured.
(1996) mentioned that most of Tamaulipas is an area of intergrades between subspecies of Thamnophis
In the dunes of Tamaulipas, the reptile fauna includes four lizards (six-lined racerunner, Texas horned lizard Phrynosoma cornutum, glass lizard Ophisaurus incomptus, and northern keeled earless lizard Holbrookia propinqua), a snake (western ribbon snake Thamnophis
proximus), and a turtle (Texas tortoise Gopherus berlandieri).
-- Reproductive tissue was examined from 120 museum specimens of Thamnophis
cyrtopsis from Arizona, New Mexico, Texas and the Mexican state of Sonora.
Homogeneity of the genetic variance-covariance matrix for predator traits in two natural populations of the garter snake Thamnophis
Contribution 10 the knowledge of the brood size of Storeria storerioides (Cope, 1865) and Thamnophis
pulchrilatus (Cope, 1884) at Distrito Federal, Mexico.
One-way Single- double- Species funnel funnel Amphibians Acris crepitans 0 1 Bufo valliceps 5 4 Gastrophryne olivaceus 0 5 Rana catesbeiana 4 5 Rana sphenocephala 0 2 Scaphiopus holbrookii 0 1 Scaphiopus hurteri 2 0 Total 11 18 Reptiles Agkistrodon contortrix 4 0 Coluber constrictor 1 4 Elaphe obsoleta 1 2 Nerodia rhombifer 0 3 Thamnophis
proximus 1 11 Cnemidophorus 3 0 sexlineatus Sceloporus olivaceus 1 2 Sceloporus undulatus 2 12 Scincella lateralis 0 5 Total 13 39 Mammals Sigmodon hispidus 8 19 Total herpetofauna 24 57 Total vertebrates 32 76