Gordon H Rodda (Former Employee)
Science and Products
Filter Total Items: 68
The impact of the introduction of the colubrid snake Boiga irregularis on Guam's lizards The impact of the introduction of the colubrid snake Boiga irregularis on Guam's lizards
The extirpation of Guam's forest avifauna has been attributed to the accidental introduction and subsequent irruption of the brown tree snake, Boiga irregularis. However, recent dietary studies of this nocturnal arboreal snake indicate that it now preys primarily on lizards, not birds. We evaluated the effect the snake has had on Guam's lizards by contrasting lizard communities on Guam...
Authors
G.H. Rodda, T. H. Fritts
The mating behavior of Iguana iguana The mating behavior of Iguana iguana
Over a 19 month period I observed the social behaviors of individually recognized green iguanas, Iguana iguana, at three sites in the llanos of Venezuela. The behavior of iguanas outside the mating season differed from that seen during the mating season in three major ways: (1) during normal waking hours outside the breeding season, adult iguanas spent the majority of time immobile...
Authors
G.H. Rodda
Trapping the arboreal snake Boiga irregularis Trapping the arboreal snake Boiga irregularis
The snake Boiga irregularis, an exotic on Guam, has eliminated the majority of the native vertebrates there. We tested traps designed to control this arboreal snake during three periods of 20-41 days in 1988 and 1989. The relative trapping successes with different baits and trap configurations indicated that this snake will not readily push through a visually obstructed entrance. However...
Authors
Gordon H. Rodda, O. Eugene Maughan, Thomas H. Fritts, Renee Rondeau
The distributional patterns of reptiles and amphibians in the Mariana Islands The distributional patterns of reptiles and amphibians in the Mariana Islands
No abstract available.
Authors
G.H. Rodda, T. H. Fritts, J. Reichel
The nesting behavior of the Green Iguana, Iguana iguana, in the llanos of Venezuela The nesting behavior of the Green Iguana, Iguana iguana, in the llanos of Venezuela
No abstract available.
Authors
G.H. Rodda, A. Grajal
The brown tree snake, an introduced pest species in the central Pacific Islands The brown tree snake, an introduced pest species in the central Pacific Islands
The reproduction of endangered Mariana crows (Corvus kubaryi) is intensively monitored, nests are protected, and (when necessary) eggs or young are moved to the safety of lab conditions until they are less vulnerable to the threats in natural habitats. Barriers on tree trunks and judicious pruning of adjacent trees are used in attempts to exclude snakes from nest trees. Two birds unique...
Authors
Thomas H. Fritts, Gordon H. Rodda
Prey preference and seasonal predation by oystercatchers on limpets at San Nicolas Island, California, USA Prey preference and seasonal predation by oystercatchers on limpets at San Nicolas Island, California, USA
No abstract available.
Authors
D. R. Lindberg, K.I. Warheit, J. A. Estes
The orientation and navigation of juvenile alligators: evidence of magnetic sensitivity The orientation and navigation of juvenile alligators: evidence of magnetic sensitivity
Displaced juvenile alligators, Alligator mississipiensis, were released on land in a 9 m diameter dodecagonal arena to test their ability to orient in the absence of terrestrial landmarks. Navigational ability seemed to improve with age. When displaced along a fairly direct route yearlings (age 7–14 months) compensated for their displacement, moving in the direction from the arena to...
Authors
Gordon H. Rodda
Non-USGS Publications**
Rodda, G.H. 2003. Biology and reproduction of Iguana iguana in the wild. In: Biology, husbandry, and medicine of the green iguana. Malabar, Florida: Kreiger Publishing. 1-27.
Rodda, G.H. 1984. The orientation and navigation of juvenile alligators: evidence of magnetic sensitivity. Journal of Comparative Physiology A. 154(5): 649-658.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 68
The impact of the introduction of the colubrid snake Boiga irregularis on Guam's lizards The impact of the introduction of the colubrid snake Boiga irregularis on Guam's lizards
The extirpation of Guam's forest avifauna has been attributed to the accidental introduction and subsequent irruption of the brown tree snake, Boiga irregularis. However, recent dietary studies of this nocturnal arboreal snake indicate that it now preys primarily on lizards, not birds. We evaluated the effect the snake has had on Guam's lizards by contrasting lizard communities on Guam...
Authors
G.H. Rodda, T. H. Fritts
The mating behavior of Iguana iguana The mating behavior of Iguana iguana
Over a 19 month period I observed the social behaviors of individually recognized green iguanas, Iguana iguana, at three sites in the llanos of Venezuela. The behavior of iguanas outside the mating season differed from that seen during the mating season in three major ways: (1) during normal waking hours outside the breeding season, adult iguanas spent the majority of time immobile...
Authors
G.H. Rodda
Trapping the arboreal snake Boiga irregularis Trapping the arboreal snake Boiga irregularis
The snake Boiga irregularis, an exotic on Guam, has eliminated the majority of the native vertebrates there. We tested traps designed to control this arboreal snake during three periods of 20-41 days in 1988 and 1989. The relative trapping successes with different baits and trap configurations indicated that this snake will not readily push through a visually obstructed entrance. However...
Authors
Gordon H. Rodda, O. Eugene Maughan, Thomas H. Fritts, Renee Rondeau
The distributional patterns of reptiles and amphibians in the Mariana Islands The distributional patterns of reptiles and amphibians in the Mariana Islands
No abstract available.
Authors
G.H. Rodda, T. H. Fritts, J. Reichel
The nesting behavior of the Green Iguana, Iguana iguana, in the llanos of Venezuela The nesting behavior of the Green Iguana, Iguana iguana, in the llanos of Venezuela
No abstract available.
Authors
G.H. Rodda, A. Grajal
The brown tree snake, an introduced pest species in the central Pacific Islands The brown tree snake, an introduced pest species in the central Pacific Islands
The reproduction of endangered Mariana crows (Corvus kubaryi) is intensively monitored, nests are protected, and (when necessary) eggs or young are moved to the safety of lab conditions until they are less vulnerable to the threats in natural habitats. Barriers on tree trunks and judicious pruning of adjacent trees are used in attempts to exclude snakes from nest trees. Two birds unique...
Authors
Thomas H. Fritts, Gordon H. Rodda
Prey preference and seasonal predation by oystercatchers on limpets at San Nicolas Island, California, USA Prey preference and seasonal predation by oystercatchers on limpets at San Nicolas Island, California, USA
No abstract available.
Authors
D. R. Lindberg, K.I. Warheit, J. A. Estes
The orientation and navigation of juvenile alligators: evidence of magnetic sensitivity The orientation and navigation of juvenile alligators: evidence of magnetic sensitivity
Displaced juvenile alligators, Alligator mississipiensis, were released on land in a 9 m diameter dodecagonal arena to test their ability to orient in the absence of terrestrial landmarks. Navigational ability seemed to improve with age. When displaced along a fairly direct route yearlings (age 7–14 months) compensated for their displacement, moving in the direction from the arena to...
Authors
Gordon H. Rodda
Non-USGS Publications**
Rodda, G.H. 2003. Biology and reproduction of Iguana iguana in the wild. In: Biology, husbandry, and medicine of the green iguana. Malabar, Florida: Kreiger Publishing. 1-27.
Rodda, G.H. 1984. The orientation and navigation of juvenile alligators: evidence of magnetic sensitivity. Journal of Comparative Physiology A. 154(5): 649-658.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.