Results 41 to 50 of about 10,978,714 (364)

Convergent evolution in toothed whale cochleae

open access: yesBMC Evolutionary Biology, 2019
Background Odontocetes (toothed whales) are the most species-rich marine mammal lineage. The catalyst for their evolutionary success is echolocation - a form of biological sonar that uses high-frequency sound, produced in the forehead and ultimately ...
Travis Park   +4 more
doaj   +1 more source

Synthetic and Semi-Synthetic Microplastic Ingestion by Mesopelagic Fishes From Tristan da Cunha and St Helena, South Atlantic

open access: yesFrontiers in Marine Science, 2021
Mesopelagic fishes were sampled around Tristan da Cunha and St Helena in the South Atlantic from the RRS Discovery at depths down to 1000 m. Sampling was part of the Blue Belt Programme, a marine survey of British Overseas Territories funded by the ...
Alexandra R. McGoran   +4 more
doaj   +1 more source

Development of novel multiplex microsatellite polymerase chain reactions to enable high-throughput population genetic studies of Schistosoma haematobium

open access: yesParasites & Vectors, 2015
Background Human urogenital schistosomiasis caused by Schistosoma haematobium is widely distributed across Africa and is increasingly targeted for control and regional elimination.
B. L. Webster   +12 more
doaj   +1 more source

Transcriptomic evidence for visual adaptation during the aquatic to terrestrial metamorphosis in leopard frogs

open access: yesBMC Biology, 2022
Background Differences in morphology, ecology, and behavior through ontogeny can result in opposing selective pressures at different life stages. Most animals, however, transition through two or more distinct phenotypic phases, which is hypothesized to ...
Ryan K. Schott   +6 more
doaj   +1 more source

The Deep History of Life [PDF]

open access: yesThe Biomedical & Life Sciences Collection, 2012
The conventional fossil record is built of hard parts—bones, shells, and decay-resistant organic tissues buried in the sediments that accumulate on floodplains, in lakes, and on the seafloor. In the 1950s, geologists first began the routine application of radioactive decay to problems of geologic age.
openaire   +2 more sources

Legacies in life histories [PDF]

open access: yesIntegrative and Comparative Biology, 2006
Complex life-histories are common in nature, have many important biological consequences, and are an important focal area for integrative biology. For organisms with complex life-histories, a legacy is something handed down from an ancestor or previous stage, and can be genetic, nutritional/provisional, experiential, as well as the result of random ...
Benjamin G. Miner, Dianna K. Padilla
openaire   +3 more sources

The Tsimane Health and Life History Project: Integrating anthropology and biomedicine

open access: yesEvolutionary Anthropology (print), 2017
The Tsimane Health and Life History Project, an integrated bio‐behavioral study of the human life course, is designed to test competing hypotheses of human life‐history evolution.
M. Gurven   +7 more
semanticscholar   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

open access: yesPopulation Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Quo Vadis Venomics? A Roadmap to Neglected Venomous Invertebrates

open access: yesToxins, 2014
Venomics research is being revolutionized by the increased use of sensitive -omics techniques to identify venom toxins and their transcripts in both well studied and neglected venomous taxa.
Bjoern Marcus von Reumont   +2 more
doaj   +1 more source

Metabarcoding unsorted kick‐samples facilitates macroinvertebrate‐based biomonitoring with increased taxonomic resolution, while outperforming environmental DNA

open access: yesEnvironmental DNA, 2021
While previous studies have highlighted the potential of DNA‐based methods for the biomonitoring of freshwater macroinvertebrates, a limited number have investigated homogenization of bulk samples that include debris, in order to reduce sample‐processing
Lyndall Pereira‐da‐Conceicoa   +5 more
doaj   +1 more source

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