Results 91 to 100 of about 5,827 (209)

Atividade externa e coleta de recursos em ninhos naturais por campeiras da abelha canudo Scaptotrigona bipunctata (Hymenoptera, Apidae, Meliponini). [PDF]

open access: yes, 2018
O objetivo desse trabalho foi investigar a atividade externa e a coleta de recursos por campeiras da abelha canudo (Scaptotrigona bipunctata), a partir de dois ninhos naturais.
FREITAS, B. M.   +5 more
core  

An overview of cytogenetics of the tribe Meliponini (Hymenoptera: Apidae)

open access: yesGenetica, 2017
The present study provides a comprehensive review of cytogenetic data on Meliponini and their chromosomal evolution. The compiled data show that only 104 species of stingless bees, representing 32 of the 54 living genera have been studied cytogenetically and that among these species, it is possible to recognize three main groups with n = 9, 15 and 17 ...
Mara Garcia, Tavares   +2 more
openaire   +3 more sources

Reassessing Hybridisation in Australian Tetragonula Stingless Bees Using Multiple Genetic Markers

open access: yesEcology and Evolution, Volume 15, Issue 2, February 2025.
We reassessed previous reports of hybridisation in Australian stingless bees using multiple SNP markers. We find no evidence for contemporary or recent hybridisation, contrary to prior conclusions based on microsatellite data. ABSTRACT We re‐examined reports of hybridisation in three cryptic stingless bee species in the genus Tetragonula in South East ...
James P. Hereward   +4 more
wiley   +1 more source

Oviposition behavior of Plutella xylostella onto cabbages covered with nets [PDF]

open access: yes, 2011
Plusieurs expérimentations de terrains menées en zone tropicale en Afrique et en Asie ont montré l'efficacité des filets anti-insectes pour protéger les cultures de choux contre les Lépidoptères en particulier Plutella xylostella.
Coffi, Hubert Kacou   +3 more
core  

Colony strength and queen replacement in Melipona marginata (Apidae: Meliponini) [PDF]

open access: yesBrazilian Journal of Biology, 2005
Physogastric queens of Melipona marginata were removed from their colonies in order to verify the acceptance of a new queen by workers. Colony strength was evaluated according to queen oviposition rate and comb diameters. Replacement was observed seven times.
openaire   +5 more sources

Tree traits are a stronger predictor of bee traits and species richness than taxonomic diversity

open access: yesFunctional Ecology, Volume 39, Issue 1, Page 281-292, January 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Functional traits help to understand biological diversity and the mechanism by which ecological communities are structured and how they respond to the environment. For example, the high tree species diversity within tropical forests can be grouped into a few functional ...
Adrian González‐Chaves   +5 more
wiley   +1 more source

Ovary Activation in Virgin Queens of Plebeia lucii Moure (Hymenoptera: Meliponini)

open access: yesSociobiology
Stingless bees (Meliponini) are commonly used in meliponiculture and pollination. In colonies of Plebeia lucii Moure (Hymenoptera: Meliponini), a single queen undergoes changes in hormone profiles, as well as physiological, behavioral, transcriptional ...
Ana Paula Pereira Raimundo   +6 more
doaj   +1 more source

Structural and ultrastructural characterization of male reproductive tracts and spermatozoa in fig wasps of the genus Pegoscapus (Hymenoptera, Chalcidoidea) [PDF]

open access: yes, 2008
The three Pegoscapus species present the same internal reproductive tract features comprising testes with a single testicular tubule, seminal vesicles, vasa deferentia, accessory glands and an ejaculatory duct.
Báo, Sônia Nair   +2 more
core   +1 more source

The Influence of the Loss of Brazilian Savanna Vegetation on the Occurrence of Nests of Stingless Bees (Apidae: Meliponini)

open access: yesSociobiology, 2014
The vegetation of the Cerrado, also known as the Brazilian savanna, is rapidly being replaced by agricultural and urban areas. The scope of this study was to evaluate the relationship between the reduction in savanna vegetation and the occurrence of ...
Fabiana Curtopassi Pioker-Hara   +2 more
doaj   +1 more source

Abejas sin aguijón (Apidae: Meliponini) en Loreto, Perú [PDF]

open access: yes, 2019
Las abejas sin aguijón han jugado un papel importante en la subsistencia de los indígenas americanos, proveyéndoles miel, cera y polen; actualmente se están empezando a usar como polinizadores de cultivos. Sin embargo, recientemente estas abejas son motivo de preocupación ya que pueden ser sensibles a la alteración del hábitat, cambios que resultan en ...
Rasmussen, Claus; id_orcid 0000-0003-1529-6548   +1 more
openaire   +2 more sources

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