Results 51 to 60 of about 1,960 (289)

Parâmetros de controle de estilos fluviais na bacia hidrográfica do alto curso do rio Piranhas, semiárido paraibano

open access: yes, 2020
This study occurred in a drainage basin in the semi-arid region of Paraíba and aimed to analyze the relationship between the controls parameter used in the longitudinal profile of the upper course of the Piranhas River with their river styles.
Souza, Jonas Otaviano Praça de   +1 more
core   +1 more source

Echinoderm‐Inspired Autonomy for Soft‐Legged Robots

open access: yesAdvanced Robotics Research, EarlyView.
Inspired by echinoderms, a modular soft robot achieves autonomous phototaxis without a central controller or explicit communication. Each limb independently adapts its actuation timing through local sensing and short‐term memory. Coordination emerges purely from physical interactions, demonstrating resilience to changes in morphology, environment, and ...
Harmannus A. H. Schomaker   +2 more
wiley   +1 more source

Zwischen gebratenen Goldfischen und tanzenden Piranhas

open access: yes, 2015
Almond, David (2014). Der Junge, der mit den Piranhas schwamm. Hörbuch, Hörcompany. 336 Min., 16,95 €. „ Wie würde es euch gefallen, wenn jemand aus eurer Familie euer Zuhause zu einer Fischfabrik verwandeln würde?“ Stanley Potts ist ein Waisenjunge, der
Pläsken, Cornelia
core   +1 more source

A Pentaradial and Bilateral Combined Photoreception System in the Sea Cucumber is Mediated by a Blue Light‐Sensitive R‐Opsin

open access: yesAdvanced Science, EarlyView.
The sea cucumber Holothuria leucospilota detects blue and adjacent wavelengths of light via an r‐opsin with a maximum absorption at 459 nm. In the oral tentacles, papillae, and tube feet, distinct light‐sensing structures with specialized morphologies are formed, constituting a unique pentaradial and bilateral combined photoreception system.
Jiasheng Huang   +20 more
wiley   +1 more source

Metazoan endoparasites of Pygocentrus nattereri (Characiformes: Serrasalminae) in the Negro River, Pantanal, Brazil

open access: yesRevista Brasileira de Parasitologia Veterinária
In the period of October 2007 to August 2008, 152 specimens ofPygocentrus nattereri were caught in the Negro River in the Nhecolândia region, central Pantanal wetland, State of Mato Grosso do Sul, Brazil.
Wagner Vicentin   +5 more
doaj   +1 more source

Bite force mechanics and allometry of piranha (Serrasalmidae)

open access: yesJournal of the Mechanical Behavior of Biomedical Materials, 2021
The bite force of the piranha (Serrasalmidae) has drawn considerable attention due to its ability to effectively capture and masticate prey. Herein, we analyze theoretical anterior bite forces using a lever approach and compare them to in-vivo maximum bite forces.
Audrey, Velasco-Hogan, Marc A, Meyers
openaire   +3 more sources

Ánalise meteorológica, produtividade e crescimento do milho irrigado durante as estações de verão e inverno no sertão alagoano

open access: yes, 2023
The maize growing season throughout the year can influence its growth and productivity, since edaphoclimatic conditions vary between seasons. This study aimed to analyze the agrometeorological variables and evaluate the productivity and growth of corn ...
Nunes, Willyane Ferreira
core  

The boy who swam with piranhas

open access: yes, 2012
Stanley Potts is just an ordinary boy, but when all the jobs in Fish Quay disappear his Uncle Ernie develops an extraordinary fascination with canning fish.
Almond, D
core   +3 more sources

Underground Signals: The Ecological Power of Root Volatiles

open access: yesAdvanced Science, EarlyView.
Root volatiles mediate rhizosphere chemical communication, shaping interactions among plants, microbes, herbivores, and natural enemies. Their production, transport, and perception underpin ecological adaptation, multitrophic interactions, and plant resilience, offering opportunities for sustainable crop protection, resilient agroecosystems, and ...
Xueyao Cao   +31 more
wiley   +1 more source

Sociedade e meio ambiente no Sertão do Rio Piranhas, Capitania da Paraíba do Norte, século XVIII

open access: yesRevista Principia, 2012
A ocupação da América Portuguesa passou por diferentes etapas. Em um primeiro momento, as povoações se concentraram nas zonas litorâneas e, posteriormente, se deu um maior investimento na ocupação dos sertões.
Ana Paula da Cruz Pereira de Moraes   +2 more
doaj   +1 more source

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