Results 41 to 50 of about 303 (146)

Beyond Habitat: How Anuran Skin Texture Shapes Plant Dispersal in Neotropical Wetlands

Freshwater Biology, Volume 71, Issue 7, July 2026.
ABSTRACT Dispersal is a key process structuring wetland plant communities, yet epizoochory by amphibians remains a little‐known mechanism of passive plant dispersal. This study evaluated the potential role of Neotropical anurans as vectors of plant propagules through external adhesion in coastal wetlands.
Andressa Adolfo, Pedro Hoffmann, Andy J. Green, Milena Rosa Pereira, Leonardo F. B. Moreira, Cristina Stenert, Leonardo Maltchik   +6 more
wiley   +1 more source

Evolved pesticide tolerance influences susceptibility to parasites in amphibians

Evolutionary Applications, Volume 10, Issue 8, Page 802-812, September 2017., 2017
Abstract Because ecosystems throughout the globe are contaminated with pesticides, there is a need to understand how natural populations cope with pesticides and the implications for ecological interactions. From an evolutionary perspective, there is evidence that pesticide tolerance can be achieved via two mechanisms: selection for constitutive ...
Jessica Hua, Vanessa P. Wuerthner, Devin K. Jones, Brian Mattes, Rickey D. Cothran, Rick A. Relyea, Jason T. Hoverman   +6 more
wiley   +1 more source

Arsenic absorption and excretion in chronically exposed developing toad Rhinella arenarum

Environmental Toxicology and Pharmacology, 2017
We assessed the toxicodynamics of As in developing Rhinella arenarum toad embryos and larvae exposed from fertilization to 0.01-10mgAsL-1. We determined As content in toad embryos and larvae by X-ray fluorescence spectrometry. Toad embryos and larvae actively bioaccumulated As, reaching tissue concentrations more than one-thousand higher than control ...
Mardirosian, Mariana Noelia, Bieczynski, Flavia, Luquet, Carlos Marcelo, Pérez, Carlos A., Bongiovanni, Guillermina Azucena, Lascano, Cecilia Ines, Venturino, Andres   +6 more
openaire   +3 more sources

Metamorphosis and lncRNAs: A Close Relationship

genesis, Volume 64, Issue 2, April 2026.
ABSTRACT The classical definition of metamorphosis is a post‐embryonic transformation, such as from a tadpole to a froglet. However, recent studies suggest this process occurs to some degree in all vertebrates, as the underlying endocrine and molecular pathways are highly conserved. With the advent of high‐throughput sequencing, transcriptomic data for
H. Herrera‐Orozco, H. A. Pérez‐Mendoza   +1 more
wiley   +1 more source

Evaluation and Validation of a Semiautomatic Image Analysis Method: Quantification of Nares Cell Proliferation of Rhinella arenarum (Anura) Detected with the Avidin‐Biotin Complex/Peroxidase, DAB

Journal of Histology, Volume 2015, Issue 1, 2015., 2015
The current report presents the development and application of a novel methodological approach for computer‐based methods of processing and analysis of proliferative tissues labeled by ABC‐peroxidase method using 3, 3′‐diaminobenzidine (DAB) as chromogen. This semiautomatic method is proposed to replace the classical manual approach, widely accepted as
Javier Eduardo Diaz Zamboni, Daniela Osella, Enrique Valentín Paravani, Víctor Hugo Casco, Carlo Pellicciari   +4 more
wiley   +1 more source

Retention and delayed extinction of an instrumental task in the toad Rhinella arenarum. Effect of the overtraining

Avances en Psicología Latinoamericana, 2017
Amphibians and mammals share common basic mechanisms for associative learning. However, it has been observed that certain reinforcement paradigms produce opposite results.
Rubén Néstor Muzio, Martín Miguel Puddington, Mauricio Roberto Papini   +2 more
doaj   +1 more source

Age Structure and Size Variation in Three Closely Related Species of Casque‐Headed Frogs of the Genus Trachycephalus (Hylidae: Lophyohylini)

Acta Zoologica, Volume 106, Issue 4, Page 485-492, October 2025.
ABSTRACT Parreira. I.P. 2025. Age structure and size variation in three closely related species of casque‐headed frogs of the genus Trachycephalus (Hylidae: Lophyohylini)—Acta zoologica (Estocolmo). This study provides insights into longevity, sexual maturity and growth curves in closely related casque‐headed treefrogs distributed across distinct ...
Isabella Parreira, Fernanda B. Passaglia, Pedro P. de Queiroz, Anderson K. S. De‐Lima, Reuber A. Brandão   +4 more
wiley   +1 more source

Estradiol and reproduction in the South American toad Rhinella arenarum (Amphibian, Anura)

General and Comparative Endocrinology, 2019
Rhinella arenarum is a South American toad with wide geographic distribution. Testes of this toad produce high amount of androgens during the non reproductive season and shift steroid synthesis from androgens to 5α-pregnanedione during the breeding. In addition, plasma estradiol (E2) in males of this species shows seasonal variations but, since testes ...
Scaia, María Florencia, Volonteri, María Clara, Czuchlej, Silvia Cristina, Ceballos, Nora Raquel   +3 more
openaire   +6 more sources

Morphological Changes in Skin Glands During Development in Rhinella Arenarum (Anura: Bufonidae) [PDF]

The Anatomical Record, 2015
ABSTRACTAvoiding predation is critical to survival of animals; chemical defenses represent a common strategy among amphibians. In this study, we examined histologically the morphology of skin glands and types of secretions related to chemical skin defense during ontogeny of Rhinella arenarum.
Regueira, Eleonora, Dávila, Camila, Hermida, Gladys Noemí   +2 more
openaire   +3 more sources

Agroecosystems under conventional and organic management: hematological analysis of anuran for environmental health assessment

Environmental Advances
Conventional agriculture's high-intensity practices, involving agrochemicals and inorganic nutrients, pose a significant threat to biodiversity. On the other hand, organic farming offers a more environmentally friendly and low-intensity alternative ...
Zulma Anahí Salinas, María Selene Babini, Clarisa de Lourdes Bionda, Adolfo Ludovico Martino, Carlos Rafael Lajmanovich   +4 more
doaj   +1 more source