Results 61 to 70 of about 29,436 (338)

Human density and sampling time explain richness of anurans in the brazilian biomes

open access: yesCaldasia, 2021
Anuran richness patterns are strongly influenced by environmental factors. However, investigations on this issue have focused on the influence of abiotic factors without considering the joint effect of many existing variables, including the data sampling
Arielson dos Santos Protázio   +2 more
doaj   +1 more source

Diversity of amphibians in rice fields from northeastern Argentina [PDF]

open access: yes, 2008
Se registró y analizó la diversidad y riqueza de una comunidad de anfibios que habita campos de arroz en el nordeste de Ar.gentina. Las muestras fueron obtenidas en el período comprendido entre octubre 2001 y junio 2003.
Duré Pitteri, Marta Inés   +3 more
core  

Geographic body size variation in ectotherms: effects of seasonality on an anuran from the southern temperate forest [PDF]

open access: yes, 2015
Indexación: Web of Science; Scopus.Background: Body size variation has played a central role in biogeographical research, however, most studies have aimed to describe trends rather than search for underlying mechanisms.
Cunningham, AA   +2 more
core   +2 more sources

Vm–MSI: a Vancomycin–Antimicrobial Peptide Conjugate Combating Resistant Bacteria and Broadening the Antimicrobial Spectrum

open access: yesAdvanced Science, EarlyView.
A series of vancomycin‐antimicrobial peptide conjugates is synthesized and evaluated to identify the optimal combination. Vm‐MSI, selected from multiple candidates, exhibited potent activity against vancomycin‐resistant and Gram‐negative bacteria by disrupting membranes and inducing oxidative stress, thereby expanding vancomycin's antibacterial ...
Shuangyu Li   +7 more
wiley   +1 more source

Feeding Mechanisms in Anuran Tadpoles [PDF]

open access: yesNature, 1950
I CAN confirm that the method of mucous cord feeding referred to by Dodd1 plays a part in the natural lives of tadpoles of Rana temporaria, Bufo bufo and Bombina variegata living under natural or semi-natural conditions. It is, however, remarkable that among the many tadpoles which have been examined, definite mucous cords have been seen in only a few.
openaire   +2 more sources

Electrical Control of the Transduction Channels’ Gating Force in Mechanosensory Hair Cells

open access: yesAdvanced Science, EarlyView.
The inner ear's hair cells rely on mechanosensitive ion channels to convert vibrations of their hair‐bundle into electrical signals. We show that varying the electrical potential (U) across the sensory epithelium modulates a key determinant of mechanosensitivity—the gating force (FG)—by modulating the gating swing (d), ranging from the size of the ...
Achille Joliot   +2 more
wiley   +1 more source

Frog Skin Innate Immune Defences: Sensing and Surviving Pathogens

open access: yesFrontiers in Immunology, 2019
Amphibian skin is a mucosal surface in direct and continuous contact with a microbially diverse and laden aquatic and/or terrestrial environment. As such, frog skin is an important innate immune organ and first line of defence against pathogens in the ...
Joseph F. A. Varga   +2 more
doaj   +1 more source

Does chronic exposure to ammonium during the pre-metamorphic stages promote hindlimb abnormality in anuran metamorphs? A comparison between natural-habitat and agrosystem frogs

open access: yesActa Herpetologica, 2020
Despite their detrimental effects on locomotion, prevalence of hindlimb abnormalities is increasing in anuran populations worldwide. Among others, agrochemical pollution during the larval stage is a potential cause. However, populations exposed to such a
Sonia Zambrano-Fernández   +2 more
doaj   +1 more source

Intradermal infections by chigger mites (Hannemania spp.) in the Andean frog Telmatobius atacamensis (Anura, Telmatobiidae) [PDF]

open access: yes, 2015
Here, we report the infection of adults of the Andean frog Telmatobius atacamensis (Anura, Telmatobiidae) by leeuwenhoekiid mites of the genus Hannemania and describe the histological characteristics of the normal and infected skin and the mite's larval ...
Goldberg, Francisco Javier   +1 more
core  

REPRODUCTION AND HABITAT OF TEN BRAZILIAN FROGS (ANURA) [PDF]

open access: yes, 2008
Basic data on habitat, behavior, and reproduction arelacking for most Neotropical frog species and even highertaxonomic groups (Crump 1974; Haddad and Prado2005), particularly for those restricted to the AtlanticForest.
Facure, Katia G., Giaretta, Ariovaldo A.
core   +2 more sources

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