Results 41 to 50 of about 6,161 (248)

Resource use, niche width, and trophic position reveal diverse trophic structure in a tidal freshwater zone fish community. [PDF]

open access: yesJ Fish Biol
Abstract The tidal freshwater zone is an aquatic transition zone that links a river to its estuary and provides an important habitat used in the life cycle of resident and migratory fishes. Yet, information on the trophic structure of fishes in this habitat is scarce. To address this gap, we characterize the trophic structure of a fish community in the
Bowser EE, Tunney TD, Breau C, Hayden B.
europepmc   +2 more sources

Rapid geographic divergence in competitive ability of cane toad larvae (Rhinella marina) during a biological invasion. [PDF]

open access: yesEcology
Abstract Low population densities at the expanding edge of a biological invasion are predicted to reduce intraspecific competition such that invading organisms evolve to prioritize adaptations for rapid rates of population growth and dispersal over those that facilitate success in competitive interactions.
Clarke GS   +3 more
europepmc   +2 more sources

The impacts of habitat disturbance on adult and larval dragonflies (Odonata) in rainforest streams in Sabah, Malaysian Borneo [PDF]

open access: yes, 2017
$\textbf{1.}$ Dragonfly assemblages (Odonata: comprising damselflies, Zygoptera; and dragonflies, Anisoptera) in Southeast Asian rainforests are extremely diverse but increasingly threatened by habitat disturbance, including logging and conversion of ...

core   +2 more sources

Effects of geographic distance and abiotic variables on larval Odonata assemblages in western Amazon savannah lakes

open access: yesAnais da Academia Brasileira de Ciências
Odonata, comprising the suborders Anisoptera and Zygoptera, are important bioindicators of aquatic ecosystem health due to their sensitivity to environmental changes.
EMILY L. OLIVE   +4 more
doaj   +1 more source

The development of sexual differences in body size in Odonata in relation to mating systems

open access: yesEuropean Journal of Entomology, 2007
Adult body size is the result of important environmental, maternal and/or genetic effects acting on animals during development. Here we investigate how sexual size dimorphism (SSD) develops in seven species of Odonata: Anax imperator, Cordulegaster ...
Martin-Alejandro SERRANO-MENESES   +3 more
doaj   +1 more source

Structuring of Dragonfly Communities (Insecta: Odonata) in Eastern Amazon: Effects of Environmental and Spatial Factors in Preserved and Altered Streams

open access: yesInsects, 2019
The evaluation of the effects of environmental factors on natural communities has been one of the principal approaches in ecology; although, over the past decade, increasing importance has been given to spatial factors.
José Max Barbosa Oliveira-Junior   +1 more
doaj   +1 more source

Flight of the dragonflies and damselflies [PDF]

open access: yes, 2016
This work is a synthesis of our current understanding of the mechanics, aerodynamics and visually mediated control of dragonfly and damselfly flight, with the addition of new experimental and computational data in several key areas.
Alexander DE   +29 more
core   +2 more sources

Diagnostic Efficacy of Morphological Characters of Larval \u3ci\u3eTramea Lacerata\u3c/i\u3e Hagen and \u3ci\u3eTramea Onusta\u3c/i\u3e Hagen (Odonata: Libellulidae) in the Prairie Region of Missouri [PDF]

open access: yes, 2018
Distinguishing among species of larvae of the dragonfly genus Tramea historically has been problematic, largely due to conflicting characterizations of the larvae of T. lacerata Hagen and T. onusta Hagen (Odonata: Libellulidae) in the literature.
Landwer, Brett H. P, Sites, Robert W
core   +2 more sources

Neuroptera of the Amazon BasinPart 6. Mantispidae [PDF]

open access: yesActa Amazonica, 1982
The 27 species of Mantispidae known from the Amazon Basin are described, keys are presented to their identification, and distributions recorded. Seven new species are recorded for the first time: Plega beardi, Plega duckei, Plega paraense, Trichoscelia ...
Norman D. Penny
doaj   +1 more source

Andromorphic Crocothemis servilia (Drury) (Odonata: Libellulidae): new records from India

open access: yesRevista Chilena de Entomología, 2019
Six new records of andromorphic Crocothemis servilia from Eastern India are described here. Detail comparisons of the andromorphic female with mature male and female of this species are given.
Arajush Payra
doaj   +1 more source

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