Consulta: subjectFacets:"Physiological state"
Registros recuperados: 3
Data/hora: 02/06/2024 07:30:10

Réponse écophysiologique de l'huître creuse Crassostrea gigas à la variabilité spatio-temporelle des facteurs environnementaux. Etude par modélisation écologique
Provedor de dados: 5
Autores: Grangere, Karine.
The spatial and temporal variability in biotic and abiotic environmental factors influence the ecophysiological response of bivalves (growth, reproduction and survival). In this study, the physiological status of cultivated oysters in the Baie des Veys ecosystem was studied using an ecosystem model which simulates ecophysiological processes of oysters (growth, maintenance and reproduction) and environmental processes which control oyster responses (river inputs, meteorology, hydrodynamic). In order to assess the spatial and temporal scales of variability in this ecosystem, two modelling approaches were developed. Temporal variability from the seasonal to the inter-annual scale was studied using a box model. Results showed that the variability in...
Tipo: Text
Palavras-chave: Baie desVeys; Terrestrial inputs; Physiological state; Hydrodynamism; Oyster mortality; Primary production; Ecological model; Crassostrea gigas; Baie des Veys; Apports terrigènes; État physiologique; Hydrodynamisme; Mortalités d'huîtres; Productivité primaire; Modèles écologiques; Crassostrea gigas.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/these-6785.pdf

Interacting effects of Hydrobia ulvae bioturbation and microphytobenthos on the erodibility of mudflat sediments
Provedor de dados: 5
Autores: Orvain, Francis; Sauriau, Pierre-guy; Sygut, A; Joassard, Lucette; Le Hir, Pierre.
Microphytobenthos-macrofauna sediment interactions and their effects on sediment erodability were examined in laboratory experiments. Sediment beds were manipulated in a tidal mesocosm to produce diatom mats in exponential or in stationary phases of development after 6, 8 or 11 d of culture. These sediment beds were used in flume experiments to investigate the influence of bioturbation by the gastropod Hydrobia ulvae on both sediment and pigment resuspension as a function of the physiological state of the microphytobenthic mats. In most experiments, only a surface layer was resuspended. A model was used to analyse in detail the contribution of each variable to this surface-layer erosion. Bioturbation was the major factor controlling resuspension, and its...
Tipo: Text
Palavras-chave: Sediment; Bioturbation; Erosion; Model; Hydrobia ulvae; Physiological state; Microphytobenthos; Resuspension.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-3780.pdf

Flexible use of patch marks in an insect predator: effect of sex, hunger state, and patch quality
Provedor de dados: 19
Autores: Nakashima, Yoshitaka; Teshiba, Mayumi; Hirose, Yoshimi; 仲島, 義貴.
1. Patch marks that allow the subsequent avoidance of marked areas may be used by small animals to increase foraging efficiency. This study is the first to demonstrate the presence of a patch-marking system in insect predators. Furthermore, the marking system is found only in females, and factors such as hunger state and patch quality play a key role in determining whether a female will re-investigate a self-marked patch.  2. Females of the insect predator Orius sauteri avoided areas where the female itself had searched previously but did not avoid areas searched by conspecific females when deprived of prey for 24 h. There was no evidence that males use such a patch-marking system, indicating the presence of a sex difference in patch-mark use.  3. Females...
Palavras-chave: Anthocoridae; Foraging efficiency; Patch mark; Patch time; Physiological state; Prey availability; Sex difference.
Ano: 2002
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/805