Results 51 to 60 of about 141,757 (164)

Multiscale Environmental Drivers of Aquatic Insect Assemblages in Cerrado Streams

open access: yesAustral Ecology, Volume 51, Issue 3, March 2026.
Multi‐scale drivers of aquatic insect communities in Cerrado streams. The gradient (from left to right) indicates increasing spatial scale, showing that abundance is influenced by local factors (conductivity, temperature), taxonomic richness responds to agricultural land use at an intermediate scale, and community composition is structured by regional ...
Juliana Simião‐Ferreira   +9 more
wiley   +1 more source

Abundância de tecamebas no plâncton de reservatórios do Estado do Paraná- DOI: 10.4025/actascibiolsci.v26i4.1522

open access: yesActa Scientiarum: Biological Sciences, 2008
Este trabalho teve o objetivo de investigar os padrões de distribuição espacial e temporal da abundância de tecamebas (Rhizopoda) no plâncton de diferentes reservatórios do Estado do Paraná bem como a importância de fatores hidrodinâmicos e morfométricos
Luiz Felipe Machado Velho   +4 more
doaj   +1 more source

Estimação da abundância animal e de populações humanas móveis [PDF]

open access: yes, 2008
A estimação da abundância de populações animais e do número de pessoas de algumas populações humanas móveis é um tema bastante relevante na sociedade actual. Por exemplo, para a definição de quotas de pesca é de extrema importância uma correcta estimação
Afonso, A.   +2 more
core  

Diversity of Terrestrial Malacofauna, Favorable Habitats, and Relationships With Mollusk Size in Urban Environments of Sergipe, Northeastern Brazil

open access: yesBiotropica, Volume 58, Issue 2, March 2026.
The invasive exotic snail Achatina fulica dominates the terrestrial mollusk community in the city of Aracaju, occurring in all sampled urban habitats and being the most abundant species among the individuals collected. In addition, it exhibited a larger shell size and greater total weight, particularly in back gardens. ABSTRACT Terrestrial mollusks can
Pedro D. Lima   +11 more
wiley   +1 more source

Diel variation in abundance and size of the seabob shrimp Xiphopenaeus kroyeri (Crustacea, Penaeoidea) in the Ubatuba region, Southeastern Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2010
The objective of the present study was to analyze diel variation in the abundance and size of the seabob shrimp Xiphopenaeus kroyeri in the Ubatuba region, state of São Paulo, during the year 2000. In each season of the year, collections were made in the
Sabrina M. Simões   +3 more
doaj   +1 more source

Quantificação de mRNA de genes relacionados a resposta imune em abomaso de bovinos infectados com endoparasitos Haemonchus spp. [PDF]

open access: yes, 2011
No sudeste brasileiro os endoparasitos que causam maiores perdas na produção de bovinos são do gênero Haemonchus spp e Cooperia spp. Esses são responsáveis por uma série de alterações tanto na imunidade inata quanto adquirida do hospedeiro. Desta maneira,
ANDRÉO, R.   +5 more
core  

Urbanization Intensity, Vegetation Cover and Plant Vigor Affects Stem Galls Occurrence and Abundance in a Widely Distributed Ruderal Tropical Plant

open access: yesBiotropica, Volume 58, Issue 2, March 2026.
In this study, we demonstrate that urbanization intensity reduces the abundance of stem galls on Turnera subulata, while increased vegetation cover and plant vigor promote higher occurrence and abundance. These findings highlight the importance of native vegetation in sustaining specialized insect‐plant interactions and provide evidence that plant ...
Luziene Seixas   +4 more
wiley   +1 more source

Evaluation of the reserve effect in a marine protected area in Sagres (PNSACV) [PDF]

open access: yes, 2019
Marine Protected Areas (MPAs), especially when set up as marine reserves, have been found beneficial for fish communities and species worldwide. Evaluation of MPA effects needs to be done to understand whether existing protection measures are efficient ...
Běláčková, Adéla
core  

Abundância e sazonalidade de cigarrinhas (Hemiptera, Cicadellidae, Cicadellinae) em vegetação herbácea de pomar de laranja doce, no município de Montenegro, Estado do Rio Grande do Sul, Brasil. [PDF]

open access: yes, 2006
O presente estudo teve por objetivo conhecer a flutuação populacional e a constância de cicadelíneos presentes na vegetação herbácea de um pomar de laranja doce (Citrus sinensis (L.) Osbeck), variedade Valência, em Montenegro, RS.
Ana P. Ott   +31 more
core   +2 more sources

Patch and Landscape Predictors of Mammal Diversity and Their Trait‐Relationships in the Largest Atlantic Forest Island in Brazil

open access: yesBiotropica, Volume 58, Issue 2, March 2026.
Urbanization and habitat fragmentation reshape mammal communities on Santa Catarina Island, one of the largest Atlantic Forest islands in Brazil. Using camera traps across protected forest patches, we show that species richness declines with urban and unvegetated matrices, while abundance increases in smaller and more isolated fragments dominated by ...
Camila Rezende Ayroza   +6 more
wiley   +1 more source

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