Consulta: creatorFacets:"Preuss, Bastien"
Registros recuperados: 4
Data/hora: 06/06/2024 14:54:16

Avantages et inconvénients de la stéréo vidéo : applicabilité au protocole pour STAVIRO
Provedor de dados: 5
Autores: Powell, Abigail; Pelletier, Dominique; Roman, William; Giraud-carrier, Charlotte; Jac, Cyrielle; Gins, Niels; Preuss, Bastien.
La stéréo vidéo repose sur l’utilisation synchronisée de 2 caméras permettant de produire une image en 3 dimensions. Elle permet par triangulation d’obtenir une estimation précise de la taille de chaque individu et de mesurer les distances. En 2007 en Nouvelle Calédonie l’ IFREMER a développé des systèmes mono-vidéo autonomes et rotatifs (STAVIRO et MICADO). La caméra est déployée 12 minutes depuis un bateau sans immersion de plongeurs, le temps d’effectuer 3 rotations complètes. L’objectif de l’étude est de réaliser un bilan comparatif entre l’utilisation d’un système STAVIRO classique et l’utilisation d’un système équipé en stéréo vidéo. 59 stations ont été réalisées entre le 2 et le 13 juin 2014 dans le lagon sud ouest de la Nouvelle Calédonie.
Tipo: Text
Palavras-chave: Stéréo vidéo; Système vidéo rotatif; Vidéo sous-marine; Aires marines protégées.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00274/38570/37094.pdf

Considering multiple-species attributes to understand better the effects of successive changes in protection status on a coral reef fish assemblage
Provedor de dados: 5
Autores: Preuss, Bastien; Pelletier, Dominique; Wantiez, Laurent; Letourneur, Yves; Sarramegna, Sebastien; Kulbicki, Michel; Galzin, Rene; Ferraris, Jocelyne.
The response of fish assemblages to changes in protection status is a major issue for both biodiversity conservation and fishery management. In New Caledonia, the Abore reef marine reserve harbours more than 500 fish species, and has been subjected to changes in protection status since 1988. The present study investigates the impact of these changes on a wide subset of species (213), based on underwater visual counts collected before the opening and after the closure to fishing of this marine protected area (MPA). We analysed the spatial and temporal variability in fish assemblage attributable to protection status, explicitly considering habitat. To understand the successive responses of fish assemblage to fishing and protection, the assessment models...
Tipo: Text
Palavras-chave: MPA effect; Fishing effect; Fish assemblage; Coral reef ecosystem; Assessment model.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6130.pdf

Evaluating Management Scenarios for Fished Resources of the New Caledonian Lagoon Using a Spatially-Explicit Model
Provedor de dados: 5
Autores: Preuss, Bastien; Pelletier, Dominique; Wantiez, Laurent.
In the New Caledonian lagoon, fish populations live in a highly-fragmented habitat and seascape, and many are exploited by commercial, recreational and subsistence fishers. Although fishing has been increasing over decades, fisheries sustainability has not been assessed. We used the ISIS-Fish tool to build a spatially-explicit dynamic model for two major fish resources: spangled emperor and coral trout. The model was constructed and parameterized from many existing data habitat, fish populations, and fishing pressures. After calibration, it was used to simulate the outcomes of several management scenarios including MPA, size limitation, and increase in commercial fisher number. Results showed that depending on the species, an MPA could result in a...
Tipo: Text
Palavras-chave: Fish population dynamics; Spatially-explicit model; Management scenario assessment; Spangled emperor; Coral trout; New Caledonian lagoon.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00598/71022/69426.pdf

Decadal increase in the number of recreational users is concentrated in no-take marine reserves
Provedor de dados: 5
Autores: Gonson, Charles; Pelletier, Dominique; Gamp, Elodie; Preuss, Bastien; Jollit, Isabelle; Ferraris, Jocelyne.
In coastal areas, demographic increase is likely to result in greater numbers of recreational users, with potential consequences on marine biodiversity. These effects may also occur within Marine Protected Areas (MPAs), which are popular with recreational users. Our analysis builds on data collected over a ten-year period during three year-round surveys to appraise changes in recreational boating activities in coral ecosystems. Results show that the number of boaters has greatly increased, particularly so within MPAs during weekends and the warm season, when peaks in boat numbers have become more frequent. We also observed that the number of anchored boats has increased over the period. These changes may be resulting in biophysical impacts that could be...
Tipo: Text
Palavras-chave: Recreational uses; MPA; Coral reef ecosystem; Spatio-temporal pattern; New Caledonia; Mooring practices.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00327/43776/44014.pdf