Results 31 to 40 of about 1,997 (202)

Comunidades de prática digitais e sustentabilidade da aquicultura na Amazônia brasileira. O caso da rede social on-line WhatsApp “Peixe de Rondônia”

Revista de Economia e Sociologia Rural, 2021
Resumo: Este artigo destaca uma rede de aquicultores na região centro-este da Amazônia brasileira, com base em discussões do grupo WhatsApp “Peixe de Rondônia”, entre agosto de 2016 e outubro de 2017, acerca de soluções para superar os desafios ...
Marcos Cesar Santos, Lívia Madureira, Aurineide Alves Braga, Carlos Peixeira Marques   +3 more
doaj   +1 more source

Spatial Structure Explains Morphological Variation Better Than Climatic Gradients in the South American Rattlesnake (Crotalus durissus)

Ecology and Evolution, Volume 16, Issue 3, March 2026.
We evaluated whether climatic gradients or spatial structure better explain body size variation in the South American rattlesnake (Crotalus durissus) across its wide geographic range. After explicitly accounting for spatial autocorrelation, climatic variables were not significant predictors of body size in either sex, whereas sex‐specific spatial ...
Mileny Otani, Henrique Caldeira Costa, Cláudio Henrique Zawadzki, Diego J. Santana   +3 more
wiley   +1 more source

Recent advances in fish hatchery management Avanços recentes em larvicultura

Revista Brasileira de Zootecnia, 2010
The advancement of aquaculture has often been bottlenecked because of the lack of seed, but once that bottleneck was overcome there was rapid growth. Recent examples of advances in hatchery technology leading to increased production are sea bream and ...
Ronald P. Phelps
doaj   +1 more source

Disentangling the Components Shaping Aquatic Richness Over Spatial Scales in Extreme Climatic Events

Freshwater Biology, Volume 71, Issue 3, March 2026.
ABSTRACT Species richness in a region can be partitioned into three components: (1) spatial aggregation of individuals, (2) variation in total individual density and (3) species abundance distribution (SAD). However, it remains unclear how the influence of these components on richness changes under extreme climatic events.
Laura A. Ortega‐Corredor, Alfonso Pineda, Claudia Costa Bonecker, Angelo Antonio Agostinho, Luzia Cleide Rodrigues   +4 more
wiley   +1 more source

Impacto das atividades de aqüicultura e sistemas de tratamento de efluentes com macrófitas aquáticas í  relato de caso

Boletim do Instituto de Pesca, 2018
Os efluentes de aquicultura são ricos em nitrogênio, fósforo e matéria orgí­¢nica e contribuem para a eutrofização dos corpos de água receptores, além de ocasionar redução ou alteração da biodiversidade.
Gustavo Gonzaga Henry-Silva, Antonio Fernando Monteiro Camargo   +1 more
doaj  

The Role of Elevation, Connectivity and Land Cover on Migratory and Non‐Migratory Fish Communities in an Amazonian Riverine System

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 2, February 2026.
ABSTRACT Dams and deforestation are key drivers of freshwater biodiversity loss in the Amazon, as they alter river connectivity, water quality and habitat structure. This study investigates how connectivity (Reach Connectivity Index—RCI), elevation and natural land cover influence the diversity and composition of fish assemblages in a highly fragmented
Izaias Médice Fernandes, Hugmar Pains da Silva, Giulianna Rondineli Carmassi, Alberto Luciano Carmassi, Cláudio Henrique Zawadzki, Jhony Vendrusculo, Luzia da Silva Lourenço   +6 more
wiley   +1 more source

Métodos de estudos de sustentabilidade aplicados a aquicultura [PDF]

Revista Brasileira de Zootecnia, 2007
O objetivo deste artigo é introduzir reflexões sobre as estratégias de interconexão da aqüicultura no contexto sócio-ambiental, conclamando os atores comprometidos com o setor a pesquisar e utilizar métodos de viabilidade em conformidade com o princípio da sustentabilidade.
Eler, Márcia Noélia, Millani, Thiago José   +1 more
openaire   +3 more sources

Hydroclimatic Trends Suggest Declining Water Resources in the Cascade Reservoirs of the Tocantins River

Hydrological Processes, Volume 40, Issue 2, February 2026.
This study characterised the hydroclimatology of the seven reservoirs of the Tocantins River, along 1500 km of river and during more than 12 years of sampling, where we analysed climatic variables such as precipitation, global solar radiation, net evaporation, and air temperature, in addition to hydrological variables such as discharge and net ...
Idelina Gomes da Silva, José Luiz Cabral da Silva Júnior, Bárbara Dunck   +2 more
wiley   +1 more source

Phylogeny and historical biogeography of the Pachira sensu lato clade (Bombacoideae, Malvaceae) with a new infrageneric classification

TAXON, Volume 75, Issue 1, February 2026.
Abstract We explore phylogenetic relationships within the Pachira sensu lato clade (Bombacoideae, Malvaceae), test the monophyly of the genera Eriotheca and Pachira, and investigate their biogeographic history. The Pachira s.l. clade comprises ca. 72 species that traditionally have been placed in Eriotheca and Pachira. We sampled ca. 79% of its species
Vania Nobuko Yoshikawa, Júlia Sousa Siqueira, William S. Alverson, Rafaela Passos Camargo, Alexandre Wagner Silva Hilsdorf, Letícia Rafaela de Morais, Flávia Fonseca Pezzini, Marília Cristina Duarte   +7 more
wiley   +1 more source

MATURAÇÃO OVARIANA DE Astyanax altiparanae APÓS DESOVA EM SISTEMA DE RECIRCULAÇÃO DE ÁGUA

Boletim do Instituto de Pesca, 2018
Neste estudo, avaliamos a possibilidade de obtenção de desovas sucessivas de Astyanax altiparanae mantidos em biotério. Para isso, 104 indiví­­duos foram distribuí­­dos aleatoriamente em quatro caixas (10 fêmeas e 16 machos em cada) e mantidos a uma ...
Lieschen Valeria Guerra LIRA, Rafael Yutaka KURADOMI, Thiago GONÇALVES de Souza, Patrick HAINFELLNER, Sergio Ricardo BATLOUNI   +4 more
doaj   +1 more source