Results 21 to 30 of about 15,181 (147)

Redescripción de Parodon caliensis y Saccodon dariensis (Characiformes: Parodontidae)

open access: yesRevista de Biología Tropical, 2010
La familia Parodontidae es un grupo de peces Characiformes distribuidos a través de Sur América y parte de Panamá, contiene tres géneros: Apareiodon Eigenmann 1916, Parodon Valenciennes 1849 y Saccodon Kner 1863, con 28 especies reconocidas y dos géneros
Alejandro Londoño-Burbano   +1 more
doaj   +2 more sources

Recursive formulas for Welschinger invariants of the projective plane [PDF]

open access: yes, 2010
Welschinger invariants of the real projective plane can be computed via the enumeration of enriched graphs, called marked floor diagrams. By a purely combinatorial study of these objects, we prove a Caporaso-Harris type formula which allows one to ...
Arroyo, Aubin   +2 more
core   +2 more sources

Two new species of Hemibrycon (Characiformes, Characidae) from the Magdalena River, Colombia

open access: yesAnimal Biodiversity and Conservation, 2009
Hemibrycon brevispini sp. n. se diferencia de sus congéneres por la presencia de ganchos reducidos en todas las aletas y por una proyección alargada sobre el cuarto arco neural ventral más cercana a la primera apófisis post-cigótica neural.
C. Román-Valencia, D. K. Arcila-Mesa
doaj   +1 more source

The Atmospheric Monitoring Strategy for the Cherenkov Telescope Array [PDF]

open access: yes, 2015
The Imaging Atmospheric Cherenkov Technique (IACT) is unusual in astronomy as the atmosphere actually forms an intrinsic part of the detector system, with telescopes indirectly detecting very high energy particles by the generation and transport of ...
Doro M   +7 more
core   +2 more sources

Exhaled Nitric Oxide is Not a Biomarker for Pulmonary Tuberculosis. [PDF]

open access: yes, 2018
To reduce transmission of tuberculosis (TB) in resource-limited countries where TB remains a major cause of mortality, novel diagnostic tools are urgently needed.
Aston   +28 more
core   +1 more source

Evaluating the empirical basis for threat attribution in the IUCN Red List

open access: yesConservation Biology, EarlyView.
Abstract Understanding the impacts of different threats on species is key to successful conservation interventions and policies. The International Union for Conservation of Nature (IUCN) assesses threats to species, and the organization's Red List of Threatened Species is a key conservation tool.
Ena Humphries   +5 more
wiley   +1 more source

Morfogeometría de los peces del género Hyphessobrycon (Characiformes: Characidae), grupo heterorhabdus, en Venezuela

open access: yesRevista de Biología Tropical, 2010
El género Hyphessobrycon es uno de los más numerosos y morfológicamente complejos de la familia Characidae, incluye 122 especies válidas, de las cuales 17 están en Venezuela.
Carlos A García-Alzate   +2 more
doaj   +2 more sources

An overview of the postcranial osteology of caecilians (Gymnophiona, Lissamphibia)

open access: yesThe Anatomical Record, Volume 309, Issue 3, Page 674-699, March 2026.
Abstract Caecilians comprise a relatively small (~220 species) group (Gymnophiona) of snake‐like or worm‐like, mostly tropical amphibians. Most adult caecilians are fossorial, although some species may live in aquatic or semi‐aquatic environments, either as larvae or adults.
Rodolfo Otávio Santos   +2 more
wiley   +1 more source

A review of the Japanese longline fishery for tunas and billfishes in the Eastern Pacific Ocean, 1971-1980 [PDF]

open access: yes, 1987
ENGLISH: This report reviews the Japanese longline fishery for tunas and billfishes in the eastern Pacific Ocean during 1971-1980, extending the studies made by other investigators, which covered the 1956-1970 period.
Bayliff, William H., Miyabe, Naozumi
core  

Indigenous peoples and local community reports of climate change impacts on biodiversity

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract Climate change impacts on biodiversity have been primarily studied through ecological research methods, largely ignoring other knowledge systems. Indigenous and local knowledge systems include rich observations of changes in biodiversity that can inform climate change adaptation planning and environmental stewardship.
Albert Cruz‐Gispert   +5 more
wiley   +1 more source

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