Results 171 to 180 of about 4,582 (192)

Cytotoxicity potential of chemical constituents isolated and derivatised from Rhinella marina venom

Toxicon, 2021
Chemical compounds from skin secretions from toads of Bufonidae family have been long-studied. In the search for new molecules with pharmacological action, the 3β-OH groups of bufadienolides are commonly derivatised using acetyl groups. This work described the isolation and/or structural elucidation of isolated and derivatised compounds from the venom ...
Evaldo Dos Santos Monção, Filho, Mariana Helena, Chaves, Paulo Michel Pinheiro, Ferreira, Cláudia, Pessoa, Daisy Jereissati Barbosa, Lima, Sarah Sant' Anna, Maranhão, Domingos, de Jesus Rodrigues, Gerardo Magela, Vieira Júnior   +7 more
openaire   +2 more sources

Do cane toads(Rhinella marina) impact desert spring ecosystems?

The Proceedings of the Royal Society of Queensland, 2013
Since their introduction in 1935, cane toads (Rhinella marina (Linnaeus, 1758)) have established and spread throughout north and north-eastern Australia. Cane toad impacts to terrestrial ecosystems are well documented, but impacts to aquatic ecosystems are less well known.
Clifford, S. E., Steward, A. L., Negus, P. M., Blessing, J. J., Marshall, J. C.   +4 more
openaire   +1 more source

URINARY CORTICOSTERONE CONCENTRATIONS IN FREE-RANGING AND MANAGED CANE TOADS (RHINELLA MARINA)

Journal of Zoo and Wildlife Medicine, 2021
Approximately 40% of amphibian species are threatened with extinction. The welfare of amphibians maintained under managed care as assurance populations is of vital importance to guard against extinction and provide a viable source population for future reintroduction.
Tarra, Freel, Elizabeth, Koutsos, Larry J, Minter, Troy N, Tollefson, Frank, Ridgley, Janine L, Brown, Dustin, Smith, Heather, Scott, Kimberly, Ange-van Heugten   +8 more
openaire   +2 more sources

Cane toad (Rhinella marina) vitamin A, vitamin E, and carotenoid kinetics

Zoo Biology, 2021
AbstractMany amphibian species are threatened with extinction. Understanding their vitamin A (retinol), E (alpha‐tocopherol), and carotenoid requirements is vital, as normal levels of these nutrients have a known connection to breeding success with abnormal levels leading to disease. This research examined vitamins A, E, and carotenoids (apocarotenoid,
Tarra Freel, Elizabeth Koutsos, Larry J. Minter, Troy Tollefson, Frank Ridgley, Dustin Smith, Heather Scott, Kimberly Ange‐van Heugten   +7 more
openaire   +2 more sources

Splenic immunotoxicity in developing cane toads (Rhinella marina) from Bermuda

Environmental Toxicology and Chemistry, 2016
Abstract   The impacts of contaminated sediment from 2 ponds in Bermuda on immune function in newly metamorphosed cane toads were examined. In the present study, a partial life-cycle experiment exposing Gosner stage 20 cane toad tadpoles to pond sediment and laboratory culture water through ...
Douglas J, Fort, Michael, Mathis, Chelsea E, Fort, Hayley M, Fort, Troy D, Fort, Donald W, Linzey, Jamie P, Bacon   +6 more
openaire   +2 more sources

Rhinella marina

Rhinella marina is a large toad identified mainly by all cranial crests well developed; head wider than long; snout rounded in dorsal view; parotoid glands longer than wide, with triangular to ovoid shape, with indistinct borders; and dorsal skin covered by irregularly scattered warts (Easteal 1986; Kwet et al.
Valencia-Zuleta, Alejandro, Milto, Konstantin D., Maciel, Natan M.   +2 more
openaire   +1 more source

The enduring toxicity of road-killed cane toads (Rhinella marina)

Biological Invasions, 2011
The primary ecological impact of invasive cane toads (Rhinella marina) in Australia is mediated by their powerful toxins, which are fatal to many native species. Toads use roads as invasion corridors and feeding sites, resulting in frequent road-kills. The flattened, desiccated toad carcasses remain highly toxic despite being heated daily to >40°C for ...
Michael Crossland, Gregory Brown, Richard Shine   +2 more
openaire   +1 more source

A genetic perspective on rapid evolution in cane toads (Rhinella marina)

Molecular Ecology, 2015
AbstractThe process of biological invasion exposes a species to novel pressures, in terms of both the environments it encounters and the evolutionary consequences of range expansion. Several invaders have been shown to exhibit rapid evolutionary changes in response to those pressures, thus providing robust opportunities to clarify the processes at work
Lee A, Rollins, Mark F, Richardson, Richard, Shine   +2 more
openaire   +2 more sources

Investigation of Potassium Chloride for Euthanasia of Anesthetized Marine Toads (Rhinella marina)

Journal of Herpetological Medicine and Surgery, 2021
Euthanasia techniques in amphibians are poorly described and sparsely validated. This study investigated potassium chloride (KCl) for euthanasia of anesthetized marine toads ( Rhinella marina ). Twenty three toads were immersed in buffered MS-222 (2 g/L) for five minutes (min) beyond loss of righting reflex, manually removed, and randomly administered ...
Meghan M. Louis, Gregory Scott, Dustin Smith, Brigid V. Troan, Larry J. Minter, Julie A. Balko   +5 more
openaire   +1 more source

The Effects of Conspecific Alarm Cues on Larval Cane Toads (Rhinella marina)

Journal of Chemical Ecology, 2019
Many aquatic organisms detect and avoid damage-released cues from conspecifics, but the chemical basis of such responses, and the effects of prolonged exposure to such cues, remain poorly understood. Injured tadpoles of the cane toad (Rhinella marina) produce chemical cues that induce avoidance by conspecific tadpoles; and chronic exposure to those ...
Michael R. Crossland, Angela A. Salim, Robert J. Capon, Richard Shine   +3 more
openaire   +3 more sources