Results 41 to 50 of about 10,342 (185)

Tadpole Domination in Graphs

open access: yesمجلة بغداد للعلوم, 2018
A new type of the connected domination parameters called tadpole domination number of a graph is introduced. Tadpole domination number for some standard graphs is determined, and some bounds for this number are obtained. Additionally, a new graph, finite,
Baghdad Science Journal
doaj   +1 more source

Ranid Herpesvirus 3 Infection in Common Frog Rana temporaria Tadpoles

open access: yesEmerging Infectious Diseases, 2023
Ranid herpesvirus 3 (RaHV3) is a recently discovered virus associated with skin disease in frogs. We detected RaHV3 DNA in free-ranging common frog (Rana temporaria) tadpoles, consistent with premetamorphic infection.
Francesco C. Origgi, Annette Taugbøl
doaj   +1 more source

Welcome to the Jungle: An Examination of the Making of Science Standards

open access: yesScience Education, EarlyView.
ABSTRACT Nearly 50 million public school students in the United States are required to learn the content prescribed by state‐mandated science standards. Although much is known about the implementation of science standards and teachers' perceptions of them, the development process of these standards remains unclear.
Allison M. Esparza, Joanne K. Olson
wiley   +1 more source

Numbers, neighbors, and hungry predators: What makes chemically defended aposematic prey susceptible to predation?

open access: yesEcology and Evolution, 2020
Many chemically defended aposematic species are characterized by relatively low toxin levels, which enables predators to include them in their diets under certain circumstances.
Jan M. Kaczmarek   +3 more
doaj   +1 more source

The 5T Paradox of Triclosan: From Toiletries to Toxic Trash, a Growing Threat to Humanity

open access: yesEnvironmental Toxicology, EarlyView.
ABSTRACT Triclosan (TCS) persists as a contaminant of concern in the Anthropocene, despite regulatory actions. Environmental dissemination continues through wastewater effluents, biosolid application, and improper disposal practices. This narrative review synthesizes current evidence regarding triclosan's environmental fate, transformation pathways ...
Temitope Aribigbola   +10 more
wiley   +1 more source

Exposure to Structurally Related Organophosphate Esters Elicits Distinct Metabolomic Perturbations in Daphnia magna

open access: yesEnvironmental Toxicology, EarlyView.
ABSTRACT Organophosphate esters (OPEs) are found ubiquitously in the environment and exposure to these chemicals has induced behavioral, developmental, and morphological impairments in several model organisms. Yet there is still a lack of understanding of how sub‐lethal exposure disrupts organism function at the molecular‐level, especially for Daphnia ...
Salwa Hajir   +4 more
wiley   +1 more source

Effects of Density and Food Availability on the Growth of Captive‐Reared Eastern Hellbenders

open access: yesZoo Biology, EarlyView.
Our experiments demonstrate that food is the major factor limiting captive‐reared Hellbender growth and that increasing rearing density to the tested levels does not negatively impact growth. Implementing these changes may result in larger, more robust Hellbenders and increase the success of reintroduction programs.
Shelby M. Royal   +4 more
wiley   +1 more source

Taxonomic revision and phylogenetic position of Osteocephalus festae (Anura, Hylidae) with description of its larva

open access: yesZooKeys, 2010
Osteocephalus festae is an Amazonian species recently resurrected from a synonymy with O. buckleyi. Because few specimens are known, its morphological variation, diagnostic characters, and distribution are poorly understood.
Santiago Ron   +3 more
doaj   +1 more source

Prey group cohesion mediates the outcome of predator–prey interactions under artificial lighting

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract The highest rates of piscivorous predation in the field have been recorded during crepuscular light levels associated with sunrise and sunset or artificial lighting at night (ALAN).
Jessica R. Frey   +5 more
wiley   +1 more source

Spillover dynamics and asynchronous temporal fluctuations in host density and competence drive fungal parasite persistence in multi‐host, seasonal communities

open access: yesJournal of Animal Ecology, EarlyView.
In this study, the authors develop a new model to show that species contributions to parasite persistence can have strong, asynchronous temporal variability, often limiting the effectiveness of targeted seasonal parasite control. The model is broadly applicable for partitioning who, when, and what drive parasite persistence in multi‐host seasonal ...
Sarah A. R. Schrock   +5 more
wiley   +1 more source

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