November publications

Date de publication : Nov 29, 2016 11:8:56 AM

Analysis of community-level mesocosm data based on ecologically meaningful dissimilarity measures and data transformation. has been accepted by Environmental Toxicology and Chemistry.

Written by Cleo Tebby, Sandrine Joachim, Paul J. Van den Brink, Jean-Marc Porcher, and Rémy Beaudouin

• • Datasets : in-house mesocosm experiment with Diclofenac, chlorpyrifos dataset from R's vegan package

  • Compares ordinations produced by the Euclidean distance using log- and Hellinger-transformed data and the Bray-Curtis dissimilarity using raw and log-transformed data.

  • Unconstrained ordinations (MDS) and Principal Response Curves (PRC)

  • Outcome on risk assessment

A bioenergetics model of the entire life-cycle of the three-spined stickleback, Gasterosteus aculeatus.

Accepted for publication in Ecology of Freshwater Fish

A whole life-cycle bioenergetic model based on the Dynamic Energy Budget (DEB) theory was proposed for the three-spined stickleback (Gasterosteus aculeatus). To develop this model, experiments on growth and reproduction were performed: adult and juvenile growth, size at first reproduction, and amount of eggs spawned by females were monitored under different feeding levels and temperatures. The DEB parameters were estimated, using Bayesian statistics, based on the data produced during these experiments and on other data found in the literature. The model fitted accurately the different data used for the calibration process and, in addition, predicted accurately the datasets used to assess its predictability. Our bioenergetic model of the whole life cycle of the three-spined stickleback accounting for environmental variations could contribute in many ways to improved ecological assessment: supporting change of scale from individual to populations; developing new biomarkers of exposure and effect; analysing ecotoxicity tests with biology-based models.