Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 9969
Difference in the crab fauna of mangrove areas at a southwest Florida and a northeast Australia location: Implications for leaf litter processing
Existing paradigms suggest that mangrove leaf litter is processed primarily via the detrital pathway in forests in the Caribbean biogeographic realm whereas herbivorous crabs are relatively more important litter processors in the Indo-West Pacific. To test this hypothesis, we used pitfall traps to collect intertidal crabs to characterize the crab fauna in a mangrove estuary in southwest Florida. W
Authors
C.C. McIvor, T. J. Smith
Gonadal steroidogenesis in-vitro from juvenile alligators obtained from contaminated or control lakes
The ubiquitous distribution of many contaminants and the nonlethal, multigenerational effects of such contaminants on reproductive, endocrine, and immune systems have led to concerns that wildlife worldwide are affected. Although the causal agents and effects are known for some species, the underlying physiological mechanisms associated with contaminant-induced reproductive modifications are still
Authors
Louis J. Guillette, Timothy S. Gross, D. A. Gross, A. A. Rooney, H. Franklin Percival
Formation and regression of the corpus luteum of the American alligator
Luteal morphology of the American alligator is unique when compared to other reptiles but is similar to that of its phylogenetic relatives, the birds. The theca is extensively hypertrophied, but the granulosa never fills the cavity formed following the ovulation of the ovum. The formation of the corpus luteum (CL) is correlated with elevated plasma progesterone concentrations, which decline dramat
Authors
L. J. Guillette, A.R. Woodward, Q. You-Xiang, M.C. Cox, J.H. Matter, T. S. Gross
Can Dugongs Survive in Palau?
In August 1991 we surveyed dugongs Dugong dugon in the coastal waters of Palau using methods similar to aerial surveys conducted in 1977, 1978 and 1983. Twenty-six dugongs (including four calves) were seen, a count within the range obtained previously. The rate at which dugongs were seen per unit flight-time was lower than for any of the other surveys, despite the observers being more experienced
Authors
H. Marsh, G. B. Rathbun, T. J. O'Shea, A.R. Preen
Identification of sex in hatchling loggerhead turtles (Caretta caretta) by analysis of steroid concentrations in chorioallantoic/amniotic fluid
A major difficulty in sea turtle conservation is the inability to nonlethally and noninvasively identify the sex of hatchling sea turtles. Traditional sexing techniques such as plasma sex steroid quantification cannot be applied to hatchlings without sacrificing the hatchlings or utilizing invasive procedures. This paper presents a technique for sexing hatchling sea turtles by analysis of sex ster
Authors
T. S. Gross, D.A. Crain, K.A. Bjorndal, A.B. Bolten, R. Carthy
A highly conserved N-terminal sequence for teleost vitellogenin with potential value to the biochemistry, molecular biology and pathology of vitellogenesis
N-terminal amino acid sequences for vitellogenin (Vtg) from six species of teleost fish (striped bass, mummichog, pinfish, brown bullhead, medaka, yellow perch and the sturgeon) are compared with published N-terminal Vtg sequences for the lamprey, clawed frog and domestic chicken. Striped bass and mummichog had 100% identical amino acids between positions 7 and 21, while pinfish, brown bullhead, s
Authors
L.D. Folmar, N. D. Denslow, R.A. Wallace, G. LaFleur, T. S. Gross, S. Bonomelli, C.V. Sullivan
Biogeography and status of the striped newt (Notophthalmus perstriatus) in Georgia, USA
Abstract not supplied at this time
Authors
C. K. Dodd, L.V. LaClaire
Wind damage effects of Hurricane Andrew on mangrove communities along the southwest coast of Florida, USA
On August 24, 1992, Hurricane Andrew downed and defoliated an extensive swath of mangrove trees across the lower Florida peninsula. Permanent field sites were established to assess the extent of forest damage and to monitor the rate and process of forest recovery. Canopy trees suffered the highest mortality particularly for sites within and immediately north of the storm's eyewall. The type and ex
Authors
T.W. Doyle, T. J. Smith, M. B. Robblee
Seasonal abundance and habitat use of selected snakes trapped in xeric and mesic communities of north-central Florida
Abstract not supplied at this time
Authors
C. K. Dodd, R. Franz
The ecology of a sandhills population of the eastern narrow-mouthed toad, Gastrophryne carolinensis, during a drought
Abstract not supplied at this time
Authors
C. K. Dodd
North American box turtles (Terrapene) listed under CITES Appendix II
Abstract not supplied at this time
Authors
C. K. Dodd
Size-dependent, sex-dependent and seasonal changes in insulin-lige growth-factor-I in the loggerhead sea turtle
This study examines size-dependent, sex-dependent, and seasonal fluctuations in plasma insulin-like growth factor-I (IGF-I) concentrations in loggerhead sea turtles (Caretta caretta). Loggerhead turtles (n = 158) were captured in shrimp trawler nets during a 12-month survey in Cape Canaveral Channel, Florida. Plasma samples were analyzed using a validated heterologous radioimmunoassay. Large turtl
Authors
D.A. Crain, A.B. Bolten, K.A. Bjorndal, L. J. Guillette, T. S. Gross