Consulta: creatorFacets:"Schuck, Lucie"
Registros recuperados: 3
Data/hora: 02/06/2024 14:38:23

Using underwater video to assess megabenthic community vulnerability to trawling in the Grande Vasière (Bay of Biscay)
Provedor de dados: 5
Autores: Merillet, Laurene; Mouchet, Maud; Robert, Marianne; Salaun, Michele; Schuck, Lucie; Vaz, Sandrine; Kopp, Dorothee.
Trawling activities are considered to be one of the main sources of disturbance to the seabed worldwide. We aimed to disentangle the dominance of environmental variations and trawling intensity in order to explain the distribution of diversity patterns over 152 sampling sites in the French trawl fishing-ground, the Grande Vasière. Using a towed underwater video device, we identified 39 taxa to the finest taxonomic level possible, which were clustered according to their vulnerability to trawling disturbance based on functional traits. Using generalized linear models, we investigated whether the density distribution of each vulnerability group was sensitive to trawling intensity and habitat characteristics. Our analyses revealed a structuring effect of depth...
Tipo: Text
Palavras-chave: Bay of Biscay; Biodiversity; Bottom trawl; Fishing; Underwater video; Vulnerability.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00406/51741/52436.pdf

Influence of Temperature and Pearl Rotation on Biomineralization in the Pearl Oyster Pinctada margaritifera
Provedor de dados: 5
Autores: Le Moullac, Gilles; Schuck, Lucie; Chabrier, Sebastien; Belliard, Corinne; Lyonnard, Pierre; Broustal, Floriane; Soyez, Claude; Saulnier, Denis; Brahmi, Chloe; Ky, Chin-long; Beliaeff, Benoit.
The objective of this study was to observe the impact of temperature on pearl formation using  an integrative approach describing the rotation of the pearls, the rate of nacre deposition, the  thickness of the aragonite tablets and the biomineralizing potential of the pearl sac tissue  though the expression level of some key genes. Fifty pearl oysters were grafted with  magnetized nuclei to allow the rotation of the pearls to be described. Four months later, 32 of  these pearl oysters were exposed to four temperatures (22, 26, 30 and 34°C) for 2 weeks.  Results showed that the rotation speed differed according to the movement direction: pearls  with axial movement (AM) had a significantly higher rotation speed than those with random  movement (RM). Pearl...
Tipo: Text
Palavras-chave: Magnetometer; Rotation speed; Nacre growth; Nacre thickness; Gene expression; Pmarg-Pif177.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00450/56196/57753.pdf

Underwater video offers new insights into community structure in the Grande Vasière (Bay of Biscay)
Provedor de dados: 5
Autores: Merillet, Laurene; Robert, Marianne; Salaun, Michele; Schuck, Lucie; Mouchet, Maud; Kopp, Dorothee.
Based on towed underwater videos, diversity patterns and their main environmental and anthropogenic drivers were assessed in the “Grande Vasière” (northeast Bay of Biscay), one of the main French fishing grounds. The density of bentho-demersal megafauna was recorded along 152 transects in this area in 2014. The highest number of taxa and densities were observed on the external margin of the Grande Vasière, in deep areas with low fishing intensity. The highest levels of taxa evenness were located on the central and coastal parts that are shallower and exposed to medium to high trawling intensity. Multivariate analysis identified four different communities driven by fishing intensity, depth, sediment type and bottom current speed. We distinguished three...
Tipo: Text
Palavras-chave: Biodiversity patterns; Indicator species; Fishing and environmental variables.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00441/55261/56796.pdf