Several examples of vertebrate predators switching to invasive prey include the previously threatened Lake Erie water snake, Nerodia
sipedon insularum (Conant & Clay, 1937) (Squamata: Colubridae), whose preferred prey is now the exotic Eurasian round goby, Neogobius melanostomus (Pallas, 1814) (Perciformes: Gobiidae) (King et al.
Agkistrodon, Chiasson et ah, 1989; Crotalus and Sistrurus, Stille, 1987; Nerodia
, Thamnophis, Chiasson and Lowe, 1989).
2011), and also the snakes Helicops leopardinus (Schlegel, 1837) (Rego and Vicente, 1988), Nerodia
Ontogeny of predatory behaviour in the aquatic specialist snake, Nerodia
rhombifer, during the first year of life.
First record of Nerodia
erythrogaster bogerti (Conant, 1953) (Serpentes: Colubridae) from the state of Chihuahua, Mexico.
clarkii clarkii (Gulf Saltmarsh Watersnake): Predation.
Blem and Killeen (1993) reported that Agkistrodon piscivorus and Nerodia
taxispilota exhibited higher scotophase metabolic rates in snakes that were acclimated to a reverse photoperiod and tested in complete darkness.
Ontogenetic changes in growth efficiency in laboratory-reared water snakes of the genus Nerodia
Common Name Scientific Name Atlantic salt marsh Nerodia
clarkii taeniata snake Concho water Nerodia
paucimaculata snake Copperbelly water Nerodia
erythrogaster neglecta snake Eastern indigo Drymarchon corais couperi snake Giant garter snake Thamnophis gigas Lake Erie Nerodia
sipedon insularum water snake New Mexico Crotalus willardi obscurus ridge-nose rattlesnake San Francisco Thamnophis sirtalis tetrataenia garter snake Whipsnake Masticophis lateralis euryxanthus (striped racer), Alameda Common Name Range[dagger] Status[double dagger] Atlantic salt marsh FL (coastal areas of T snake Volusin, Brevard and Indian River counties) Concho water TX (Concho and Colorado T snake river basins of the Rolling Plains) Copperbelly water IL, IN, MI, OH, KY T snake (IN north of 40[degrees] N.
erythrogaster, the red-bellied water snake, is a water snake that is commonly found hundreds of meters from a source of water.
erythrogaster neglecta (Conant, 1949), Copper-bellied Watersnake (I)
Key words: behavioral thermoregulation; body temperature, preferred; ectotherms at northern latitudes; gestation; Nerodia
sipedon; postprandial thermophily; radiotelemetry; reproductive vs.