Results 41 to 50 of about 97,165 (165)

Efeito de sistemas de manejo nas propriedades físicas de um latossolo vermelho-escuro Effect of soil management on soil physical properties of an oxisol

Ciência Rural, 1997
Este trabalho foi realizado em 1995 na área experimental da Universidade de Cruz Alta, UNICRUZ, Cruz Alta - RS, com o objetivo de avaliar a influência de diferentes sistemas de manejo do solo nas propriedades físicas de um latossolo vermelho-escuro ...
Deonir Secco, Clovis Orlando Da Ros, Jackson Ernani Fiorin, Carlito Veck Pautz, Luciano Pasa   +4 more
doaj   +1 more source

Complex multitrophic species interactions and fitness costs: Intricate consequences of jasmonate and salicylate induced plant defences

Journal of Animal Ecology, Volume 95, Issue 10, Page 1859-1875, October 2026.
This study reveals how long‐term activation of jasmonic and salicylic acid signalling reshapes arthropod communities and plant fitness across seasons. By showing that induced defences generate contrasting outcomes and cascading trade‐offs across trophic levels, it challenges the assumption that induced resistance is uniformly beneficial in natural ...
Mônica F. Kersch‐Becker, Guilherme P. Pinheiro, Thaís S. Schweller, Martin Pareja, Victoria M. Pocius, José R. Trigo, Gustavo Q. Romero   +6 more
wiley   +1 more source

Densidade relativa de um líquido

, 2011
O experimento propõe a aplicação do método de determinação da densidade relativa de um líquido, para avaliação da sua purezaEnsino Médio ...
Centro Experimental de Ciências - Escola Superior de Biotecnologia da Universidade Católica Portuguesa
core   +2 more sources

Effects of group size on agonistic behaviors of commercially housed growing pigs Efecto del tamaño del grupo sobre la conducta agonística de cerdos en crecimiento alojados en instalaciones comerciales Efeitos do tamanho do grupo sobre a conduta agonística de suínos em crescimento alojados em instalações comerciais

Revista Colombiana de Ciencias Pecuarias, 2012
Objective: this study was conducted to understand the effects of group size on the agonistic behaviors of pigs reared at differing pen densities. Methods: thirty groups of pigs (a total of 350 individuals) housed at low, medium, and high group density (5,
Shin-Jae Rhim
doaj  

Seasonal and spatial variation of the epilithic diatoms: case study of an organic pollution gradient in a subtropical region of southern Brazil

Acta Limnologica Brasiliensia
: Aim This study aimed to understand the seasonal variation of epilithic diatoms in the Gravataí River regarding their composition and density along the river, as well as the respective relationships with local limnological variables.
Saionara Eliane Salomoni, Odete Rocha, Lezilda Carvalho Torgan   +2 more
doaj   +1 more source

A global assessment of animal community responses to agricultural management

Conservation Biology, Volume 40, Issue 5, October 2026.
Abstract Transitions in agricultural management through crop and noncrop diversification on intensively managed croplands or pastures have benefited biodiversity. However, the extent to which agricultural management benefits species communities present in undisturbed ecosystems remains largely unclear.
Susana López Rodríguez, Hanneke van ‘t Veen, Solen Le Clec'h, Rob Alkemade   +3 more
wiley   +1 more source

Atributos físicos da qualidade de um solo sob sistema agroflorestal Physical features of soil quality under an agroforestry system

Pesquisa Agropecuária Brasileira, 2004
Os sistemas agroflorestais são uma alternativa sustentável de produção agropecuária. O objetivo deste trabalho foi avaliar a qualidade de um solo sob sistema agroflorestal, mediante a quantificação dos seguintes atributos físicos do solo: densidade ...
Rodrigo Carvalho, Wenceslau J. Goedert, Marcio Silveira Armando   +2 more
doaj   +1 more source

Identifying hotspots of faunal data deficiency to direct urgent research and monitoring

Conservation Biology, Volume 40, Issue 5, October 2026.
Abstract Data deficiency is a substantial challenge for extinction risk assessments because incomplete data means we cannot accurately identify priority protected areas for conservation. Here, we use the International Union for Conservation of Nature (IUCN) distributions of amphibians, sharks and rays, fish, mammals, birds, and reptiles to identify ...
Matt W. Hayward, Danielle Verdon‐Kidd, K. Colyvas, Ellen Saxon, Andrea S. Griffin   +4 more
wiley   +1 more source

Viabilidade econômica do cultivo de carpa comum (cyprinus carpio linnaeus, 1758) em monocultivo em densidades diferentes Economical viability of the common carp (Cyprinus carpio Linnaeus, 1758) cultivation in monocultivations in different densities

Ciência e Agrotecnologia, 2004
Objetivou-se com esta pesquisa estudar o efeito econômico do povoamento de alevinos I de carpa comum (Cyprinus carpio LINNAEUS, 1758) com densidade diferenciada e com alimentação artificial e adubação química.
Álvaro Graeff
doaj   +1 more source

Spatio‐Temporal Dynamics of Asian Clams in Two Mediterranean Canals

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 9, September 2026.
ABSTRACT The rapid spread of the non‐native invasive Asian clam (Corbicula spp.) has been linked to the catastrophic decline of native freshwater mussel assemblages in Europe and North and South America. This study evaluates the spatio‐temporal dynamics and shell size structure of the Asian clam within two Mediterranean canals: Canal Imperial de Aragón
Keiko Nakamura, Joaquín Guerrero‐Campo, Beatriz Gimeno, Eva Elbaile, Carlos Salinas, Joaquim Boix, Miguel Ángel Muñoz Yanguas, Ronaldo Sousa, Francesc Mesquita‐Joanes   +8 more
wiley   +1 more source