Results 31 to 40 of about 1,210 (117)

Variabilidade no conteúdo calórico de plantas vasculares em dois reservatórios do Estado do Paraná - DOI: 10.4025/actascibiolsci.v26i2.1611

open access: yesActa Scientiarum: Biological Sciences, 2008
Com o intuito de quantificar o conteúdo calórico das plantas vasculares de dois reservatórios do Estado do Paraná, bem como sua variabilidade espacial e entre grupos ecológicos, foram realizadas amostragens em dezembro de 2002, nas zonas fluvial, de ...
Elãine Christine dos Santos Dourado   +2 more
doaj   +1 more source

Historical shifts, geographic biases, and biological constraints shape mammal species discovery

open access: yesJournal of Systematics and Evolution, Volume 64, Issue 3, Page 536-547, May 2026.
Taxonomic descriptions of mammals have become more robust from 1990 to 2025, with increased specimen sampling, broader comparisons, and more integrative methods. However, disparities remain: tropical and small‐bodied species are less comprehensively described, reflecting ongoing geographic and biological biases.
Matheus de T. Moroti   +5 more
wiley   +1 more source

Sensibilidade Espectral dos Índices de Vegetação: GNDVI, NDVI e EVI na Mata Ciliar do Reservatório de Serrinha II – PE, Brasil

open access: yesRevista Brasileira de Cartografia, 2021
Matas ciliares são florestas associadas a córregos, rios e lagos possuindo influência na proteção dos ecossistemas de ações antrópicas. O objetivo deste estudo foi identificar as alterações nas áreas de mata ciliar da Caatinga, a partir da sensibilidade ...
Ubiratan Joaquim da Silva Junior   +3 more
doaj   +1 more source

Taxonomic treatment, geographic distribution and preliminar conservation status of Croton sect. Barhamia subsect. Barhamia (Euphorbiaceae) in Brazil

open access: yesNordic Journal of Botany, Volume 2026, Issue 3, March 2026.
The genus Croton (Euphorbiaceae) is an exceptionally megadiverse genus, encompassing roughly 1200 species that are predominantly distributed across tropical regions globally. For the New World, the genus is organized into three subgenera (Adenophylli, Geiseleria and Quadrilobi) and 31 sections, with C. sect. Barhamia standing out with its approximately
Nicolas Giovanny Burilli   +2 more
wiley   +1 more source

Serology for brucellosis in free-ranging crab-eating foxes (Cerdocyon thous) and brown-nosed coatis (Nasua nasua) from Brazilian Pantanal

open access: yesCiência Rural, 2014
A serological survey in free-ranging crab-eating foxes (Canidae: Cerdocyon thous) and brown-nosed coatis (Procyonidae: Nasua nasua) was performed in the Nhecolândia sub-region of the Brazilian Pantanal to evaluate the presence of anti-smooth Brucella ...
Elaine Maria Seles Dorneles   +8 more
doaj   +1 more source

Life history induces markedly divergent insect responses to habitat loss

open access: yesJournal of Animal Ecology, Volume 95, Issue 1, Page 54-64, January 2026.
This study pioneers the use of deep learning to rapidly assess over 22,000 Amazonian insects, revealing life history‐dependent winners and losers from forest loss. It shows that terrestrial insects decline while aquatic insects thrive, with body size influencing dispersal, offering key insights for biodiversity conservation in tropical fragmented ...
Lucas F. Colares   +2 more
wiley   +1 more source

A longitudinal study of Angiostrongylus cantonensis in an urban population of Rattus norvegicus in Brazil: the influences of seasonality and host features on the pattern of infection

open access: yesParasites & Vectors, 2014
Background The nematode Angiostrongylus cantonensis is a zoonotic parasite and the most important cause of eosinophilic meningitis worldwide in humans. In Brazil, this disease has been reported in the states of Espírito Santo and Pernambuco. The parasite
Raquel O Simões   +5 more
doaj   +1 more source

Guinea pigs experimentally infected with vaccinia virus replicate and shed, but do not transmit the virus Cobaias infectadas experimentalmente com vírus vaccínia replicam e excretam, porém não transmitem o vírus

open access: yesCiência Rural, 2012
The origin of vaccinia viruses (VACV) associated with vesicular disease in cattle and humans in Southeast Brazil remains uncertain, yet the role of wild species in virus transmission has been suggested.
Juliana Felipetto Cargnelutti   +3 more
doaj   +1 more source

Small Seismic Sources to Improve Survey Efficiency at Reduced Environmental Impact: Case Study From the Brazilian Pre‐Salt

open access: yesGeophysical Prospecting, Volume 73, Issue 9, November 2025.
ABSTRACT In Brazil, concerns about marine life have resulted in strong restrictions on seismic operations, with a minimum distance of 60 km between source vessels and an exclusion zone of 1000 m for marine mammals. These restrictions impact survey efficiency, duration, logistics and cost. Optimized and physically smaller seismic sources may reduce cost
Felipe Capuzzo   +4 more
wiley   +1 more source

Aspectos ecológicos de Procamallanus (Spirocamallanus) pintoi parasita de Corydoras paleatus (Jenyns, 1842) (Siluriformes: Callichthyidae) em reservatórios do Estado do Paraná, Brasil - DOI: 10.4025/actascibiolsci.v27i3.1280

open access: yesActa Scientiarum: Biological Sciences, 2008
O presente trabalho objetivou realizar um estudo ecológico em 124 espécimes de Corydoras paleatus (Jenyns, 1842), coletados entre julho de 2001 a dezembro de 2002, em cinco reservatórios no Estado do Paraná.
Kennya Fernanda Ito   +3 more
doaj   +1 more source

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