Consulta: subjectFacets:"Environmental constraints"
Registros recuperados: 2
Data/hora: 01/06/2024 08:06:19

Testing the potential effects of shellfish farming on swimming activity and spatial distribution of sole (Solea solea) in a mesocosm
Provedor de dados: 5
Autores: Laffargue, Pascal; Begout, Marie-laure; Lagardere, Francoise.
Restructuring coastal fish nursery habitats by extensive shellfish fanning in the French part of the Bay of Biscay could influence fish physiology and behaviour and affect the ecological performance of the species. The influence of oyster-trestle cultivation installations on sole (Solea solea) swimming behaviour was investigated using an experimental pond mesocosm. A pen was constructed with three interconnected zones (two with bags of live oysters or oyster shells on trestles, and one free zone). Water renewal depended on the tide. Environmental variables were recorded continuously (temperature, oxygen, pH, meteorological data), every 3-5 days (salinity, samples taken for water analysis and estimation of sedimentation rate) or intermittently...
Tipo: Text
Palavras-chave: Tidal pond experiment; Shellfish farming; Flatfish habitat; Fisheries; Environmental constraints; Behavioural responses; Acoustic telemetry.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1848.pdf

Are communication activities shaped by environmental constraints in reverberating and absorbing forest habitats?
Provedor de dados: 42
Autores: Manthevon,Nicolas; Aubin,Thierry; Dabelsteen,Torben; Vielliar,Jacques M.E.
In the dense vegetation of temperate or tropical forests, communication processes are constrained by propagation-induced modifications of the transmitted sounds. The presence of leaves, trunks and branches induces important sound reverberation and absorption leading to diminution of the signal energy as well as qualitative modifications. The aim of this paper is to briefly review the different strategies used by birds to manage with these constraints. At the emitter's level, an adapted emission behavior which takes into account both the physical heterogeneities of the forest environment and the temporal variations of the acoustic constraints, is especially useful to control the active space of signaling. The coding of information into acoustic parameters...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acoustic communication; Propagation-induced modifications; Environmental constraints; Evolution of communication.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200011