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3761 résults › Sorting  › By 
Mot-clé : "Biomasse"_x
Source: Erudit

Paramètres gouvernant la prolifération bactérienne dans les réseaux de distribution

Mathieu, L. et al. (1992)

L'étude a permis de suivre l'évolution des caractéristiques physico-chimiques et microbiologiques des eaux dans un réseau de distribution expérimental de taille industrielle, afin de comparer d'une part l'effet du chlore et de la monochloramine sur la biomasse présente dans le système à l' ...

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Source: Ifremer

L'agrégation de thons de sub-surface au sein du système [DCP ancré - macronecton - environnement - pêche] en Martinique : étude hiérarchique par méthodes acoustiques, optiques et halieutiques

Doray, Mathieu (2 juin 2006)

Artificial Fish Aggregating Devices (FADs) are known to concentrate tropical tunas. This aggregative behaviour drastically increases the vulnerability of these species to fishing. Alternatively, FADs can be used as oceanic observatories to study the aggregative behaviour of large pelagic fish. We ...

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Source: Ifremer

Quantification des rejets d'une ferme piscicole de loup (Dicentrarchus labrax l. ) bilans de masse : n, p et c

Garidou, Cécile (1994)

INTRODUCTION: Norway Lobster fisheries in the Celtic Sea are mostly located in the Vllg and Vllh subdivisions. The communal regulation applying to Norway Lobster mesh size has been in effect since 1978. The use of derogative mesh size to catch Norway Lobsters is only allowed if the percentage of ...

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Source: Ifremer

Bilan des connaissances sur la cardine (Lepidorhombus whiffiagonis ). Etude du stock de Mer Celtique.

Aubin-ottonheimer, G (déc. 1985)

This study presents the biology of the species Lepidorhombus whiffiagonis (ecology, nutrition, sexuality, growth weight and length) and its exploitation with the balance of catches in North Atlantic and its fishing in Celtic Sea. Yield and fecundity per recruit related to the fishing effort are ...

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Source: Ifremer

The planktonic food web of the Bizerte lagoon (south-western Mediterranean) during summer: I. Spatial distribution under different anthropogenic pressures

Hlaili, A et al. (juin 2008)

The structure and the trophic interactions of the planktonic food web were investigated during summer 2004 in a coastal lagoon of southwestern Mediterranean Sea. Biomasses of planktonic components as well as bacterial and phytoplankton production and grazing by microzooplankton were quantified at ...

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Source: Ifremer

Inventaire de la biodiversité marine dans le Golfe normano-breton. Echinodermes

Le Mao, Patrick (oct. 2009)

This work is a compilation of faunal datas collected in the normano-breton Gulf, relating to echinoderms. Ce travail est une compilation des données faunistiques collectées dans le golfe normano-breton et se rapportant aux échinodermes. En Manche occidentale, les laboratoires de Roscoff et de ...

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Source: Ifremer

Surveillance écologique et halieutique du site de Flamanville, année 1998

Dreves, Luc et al. (juin 1999)

Monitoring n°16 of the Flamanville nuclear power plant takes into account studies conducted between March and September 1998. Impacts on hydrology, microbiology, phytoplankton, zooplankton, fisheries, intertidal phytobenthos and zoobenthos are reported. This power plant has been in operation for ...

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Source: Ifremer

Ressources génétiques et phylogéographie des huîtres creuses Crassostrea gigas et C. angulata : variabilité, différenciation et adaptation des populations naturelles et introduites

Huvet, Arnaud (18 déc. 2000)

L 'huître creuse japonaise Crassostrea gigas et portugaise C. angulata ont été respectivement décrites par Thunberg (1793) et Lamarck (1819). Mais les similitudes morphologiques et l 'homogénéité des fréquences allozymiques entre populations ont conduit de nombreux auteurs à proposer l' ...

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Source: Ifremer

Free-living and particle-associated prokaryote metabolism in giant kelp forests: Implications for carbon flux in a sub-Antarctic coastal area

Schapira, Mathilde et al. (juin 2012)

Extensive beds of large subtidal kelps are characteristic of many temperate and subpolar coastlines. They provide habitats for a wide range of other species and are sites of high primary production that generate large quantities of water-borne particles and dissolved organic compounds that support ...

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Source: Ifremer

Large-scale patterns of river inputs in southwestern Europe: seasonal and interannual variations and potential eutrophication effects at the coastal zone

Romero, Estela et al. (mai 2013)

We provide data on nutrient export for 28 rivers in southwestern Europe and analyze long-term changes in the context of anthropogenic pressures and regulation policies. Special attention is given to seasonal variations, because the integrated annual values that are usually provided do not allow us ...

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