Results 41 to 50 of about 3,168 (183)

Determinação do potencial larvófago de Poecilia reticulata em condições domésticas de controle biológico

Cadernos de Saúde Coletiva, 2014
Configurada como um dos mais importantes problemas de saúde pública do mundo, a dengue atinge especialmente países com clima tropical, como o Brasil. O controle biológico por meio da utilização de peixes larvófagos aparece como alternativa para reduzir ...
Boscolli Barbosa Pereira, Eidis Antônio de Oliveira   +1 more
doaj   +1 more source

SPERMATOGONIES ET SPERMATOCYTES FLAGELLÉS CHEZ POECILIA RETICULATA (TÉLÉOSTÉENS CYPRINODONTIFORMES) [PDF]

Annales de Biologie Animale Biochimie Biophysique, 1969
La présence d'un flagelle sur des spermatogonies et spermatocytes et de 2 flagelles sur des spermatides est décrite chez le Guppy (Poecilia reticulata). Les flagelles présents sur les gonies et spermatocytes sont plus courts que ceux des spermatides et débouchent directement hors des cellules. Le mode de formation des flagelles est discuté.
Billard, Roland, Fléchon, J.-E., Escaffre, Anne-Marie   +2 more
openaire   +2 more sources

Individual variation in perceived density of conspecifics and its impacts on the realization of ecological niches

Oikos, EarlyView.
Animals gather information about their surroundings, including their social environment, using a wide range of sensory modalities. Variation in reception, processing and interpretation of information (cues or signals) can lead to differences in how individuals perceive their local environment. Yet, how individual differences in environmental perception
Ane Liv Berthelsen, Barbara A. Caspers, Nayden Chakarov, Alexandra K. Childs, Angelica Coculla, Melanie Dammhahn, Maria Moiron, Max Mühlenhaupt, Caroline Müller, Jules Petit, Tim M. Rapp, Nora K. E. Schulz, Svenja Stoehr, David L. J. Vendrami   +13 more
wiley   +1 more source

Bandwagon effects in a floral market: Early pollinator acquisition offsets colour disadvantages in less attractive flowers

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Flowers with striking colours or scents are often considered to have an advantage in the competition for pollinators. However, if pollinators copy others to avoid exploration costs in changing environments, less attractive flowers may benefit from acquiring early ...
Lina G. Kawaguchi, Kazuharu Ohashi, Akihiro Konuma, Yukihiko Toquenaga   +3 more
wiley   +1 more source

Functional response predicts invasiveness but not trophic impact

Journal of Animal Ecology, EarlyView.
This comparative analysis challenges the current paradigm that pre‐invasion functional response magnitude serves as a reliable predictor of post‐invasion ecological impact and highlights the need to distinguish between pre‐adaptation in native ranges and realized performance in invaded ecosystems.
Marine A. Courtois, Chloé Souques, Yann Voituron, Loïc Teulier, Vincent Médoc, François‐Xavier Dechaume‐Moncharmont   +5 more
wiley   +1 more source

Capacidad larvívora del gold fish (carassius auratus auratus) y del guppy salvaje (poecilia reticulata) sobre larvas de aedes aegypti en condiciones de laboratorio

Revista Científica, 2010
El control biológico de vectores de importancia médica se presenta como una alternativa al uso de plaguicidas. La utilización de peces larvívoros se promueve como una nueva estrategia para el control de vectores.
Nereida Valero, Eddy Meleán, Mery Maldonado, Milagros MontieL, Yraima Larreal, Luz Marina Espina   +5 more
doaj  

LA SPERMATOGENÈSE DE POECILIA RETICULATA. II. — LA PRODUCTION SPERMATOGÉNÉTIQUE [PDF]

Annales de Biologie Animale Biochimie Biophysique, 1969
La production spermatogénétique de Poecilia reticulata est de 36 spermatozeugmes par jour soit environ 750 000 spermatozoïdes. Dans cette espèce, le canal testiculaire apparaît comme un véritable organe de stockage desspermatozoïdes qui n'assure pas une élimination régulière des spermatozeugmes ce qui conduit à une grande hétérogénéité dans l'âge des ...
Billard, Roland, Puissant, Claudine
openaire   +2 more sources

A wild‐caught rosy barb Pethia conchonius in a British urban pond underscores the need to prevent aquarium releases

Journal of Fish Biology, EarlyView.
Abstract A specimen of rosy barb Pethia conchonius of 51 mm standard length, encountered in an urban pond in London, is reported. This small cyprinid is native to lakes and streams in subtropical regions of southern Asia and is commonly sold as an ornamental fish.
Peter J. Barry, Phil I. Davison, Luke Pearson, Gordon H. Copp   +3 more
wiley   +1 more source

Sequencing and characterization of the guppy (Poecilia reticulata) transcriptome [PDF]

BMC Genomics, 2011
Next-generation sequencing is providing researchers with a relatively fast and affordable option for developing genomic resources for organisms that are not among the traditional genetic models. Here we present a de novo assembly of the guppy (Poecilia reticulata) transcriptome using 454 sequence reads, and we evaluate potential uses of this ...
Fraser, Bonnie A, Weadick, Cameron J, Janowitz, Ilana, Rodd, F H, Hughes, Kimberly A   +4 more
openaire   +4 more sources

Linking rivers, mixing faunas: How artificial connectivity between the Middle and Upper Paraná River basins shapes fish diversity in a tributary of the Itaipu Reservoir, Brazil

Journal of Fish Biology, EarlyView.
Abstract This work aimed to investigate the distribution and occurrence of fish species along the São Francisco Falso Braço Norte (SFFBN) River basin, a tributary of the Middle Paraná River basin now artificially connected to the Upper Paraná ecoregion, to evaluate how such connectivity may affect the biogeographic distribution and regional composition
Lucas E. P. Kampfert, João C. Maicrovicz, Daniel R. Blanco, Denise Lange, Carla S. Pavanelli, Heleno Brandão   +5 more
wiley   +1 more source