Consulta: creatorFacets:"Gaertner-mazouni, N."
Registros recuperados: 3
Data/hora: 16/06/2024 17:44:40

Assessing functional diversity: the influence of the number of the functional traits
Provedor de dados: 5
Autores: Legras, Gaëlle; Loiseau, Nicolas; Gaertner, Jean-claude; Poggiale, J-c.; Gaertner-mazouni, N.
The impact of the variation of the number of functional traits on functional diversity assessment is still poorly known. Although the covariation between these two parameters may be desirable in some situations (e.g. if adding functional traits provides relevant new functional information), it may also result from mathematical artefacts and lead to misinterpretation of the results obtained. Here, we have tested the behaviour of a set of nine indices widely used for assessing the three main components of functional diversity (i.e. functional richness, evenness and divergence), according to the variation in the number of functional traits. We found that the number of functional traits may strongly impact the values of most of the indices considered, whatever...
Tipo: Text
Palavras-chave: Functional traits; Dissimilarity metric; Functional diversity; Index sensitivity; Trend analysis.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00503/61438/65561.pdf

Phenotype plasticity, local adaptation, and biofouling influence on growth of the pearl oyster Pinctada margaritifera: A common garden approach
Provedor de dados: 5
Autores: Hulot, V.; Saulnier, Denis; Latchere, O.; Maihota, N.; Gaertner-mazouni, N.
The purpose of our study is to investigate (1) the influence of phenotype plasticity and local adaptation on pearl-oyster physiology by testing the persistence of growth differentiation of two pearl oyster populations (Arutua and Mangareva) in common garden experiment; (2) to quantify the influence of biofouling development on the growth of each pearl oyster population. According to our observations, the growth rate in terms of total oyster weight suggested better growth performance of the pearl oyster Pinctada margaritifera in Mangareva (0.21–0.24 ± 0.01 g.day−1) than Arutua (0.14–0.15 ± 0.01 g.day−1). However, similar growth performances are observed at the Vairao common garden site for oyster stocks from Mangareva (0.07 ± 0.01 mm.day−1 or...
Tipo: Text
Palavras-chave: Pearl oyster; Growth performance; Biofouling; Endogenous factor; Environmental factor; Common garden experiment.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00507/61866/65934.pdf

Impact of pCO2 on the energy, reproduction and growth of the shell of the pearl oyster Pinctada margaritifera
Provedor de dados: 5
Autores: Le Moullac, Gilles; Soyez, Claude; Vidal-dupiol, Jeremie; Belliard, Corinne; Fievet, Julie; Sham-koua, Manaarii; Lo-yat, Alain; Saulnier, Denis; Gaertner-mazouni, N.; Gueguen, Yannick.
The possible consequences of acidification on pearl farming are disruption of oyster metabolism and change in growth. In the laboratory, we studied the impact of pCO2 (3540, 1338 and 541μatm) on the physiology of pearl oysters exposed for 100 days. This experiment was repeated after an interval of one year. Several physiological compartments were examined in pearl oysters: the scope for growth by measuring ingestion, assimilation and oxygen consumption, gametogenesis by means of histological observations, shell growth by measurement and observation by optical and electronic microscopy, and at molecular level by measuring the expression of nine genes of mantle cells implied in the biomineralisation process. Results from both experiments showed that high...
Tipo: Text
Palavras-chave: Global change; Pearl oyster; Bioenergetic; Biomineralization; Pacific Ocean; French Polynesia.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00321/43189/42737.pdf