Biography:

In the past Peter G. Beninger has collaborated on articles with Albert Lucas and Mickaël Dutertre. One of their most recent publications is The use of physiological condition indices in marine bivalve aquaculture. Which was published in journal Aquaculture.

More information about Peter G. Beninger research including statistics on their citations can be found on their Copernicus Academic profile page.

Peter G. Beninger's Articles: (5)

The use of physiological condition indices in marine bivalve aquaculture

AbstractThe physiological condition indices most commonly used in bivalve aquaculture are reviewed and evaluated. Two general categories of indices may be distinguished: static and dynamic. Of the static indices reviewed, only one is recommended for use in the culture of early developmental stages — the dry ash weight: total dry weight ratio. In the case of juveniles and adults, the easily-measured dry tissue weight: dry shell weight is recommended for most routine work.The dynamic indices reviewed are based on production estimates, and hence reflect physiological changes over specified time intervals. Of these indices, only net growth efficiency is recommended for use in bivalve aquaculture, and it is applicable to all life stages. While this index gives the most information about the physiological state of the animals comprising a population, it is very difficult to evaluate and is thus most appropriate as a research tool.

Impact of seston characteristics on qualitative particle selection sites and efficiencies in the pseudolamellibranch bivalve Crassostrea gigas

AbstractTo date, knowledge of the qualitative particle selection sites and conditions in the widely-distributed bivalve Crassostrea gigas is incomplete, having focussed either on heterogeneous particles, or on particles intentionally too large to enter the gill principal filament tracts. We used endoscope-directed sampling and the intact diatom-empty, cleaned frustule approach to unambiguously establish qualitative selection sites and the influence of seston quality (varying proportions of intact diatoms and empty, cleaned frustules) and quantity (particle loads) on the degree of qualitative selection. Normally-feeding oysters were presented test mixtures of the naturally-occurring Actinoptychus senarius (small enough to enter the gill principal filaments), and the potential selection sites (gill: dorsal and ventral collecting tracts; labial palps: anteriorly-deposited pseudofaeces), were sampled for comparison with the proportions and concentrations of the ambient medium. Qualitative selection was demonstrated at both the gills and labial palps. Gill selection efficiency was shown to be directly proportional to seston quality and quantity, using a technique independant of pseudofeces mucus content. The oyster gill is thus able to increase ingested food quality when environmental food quality is low and / or when seston concentrations are high, which is typical of oyster habitats. Palp selection efficiency was directly proportional to seston quality, but at the highest concentration tested, no qualitative selection was observed on the labial palps, probably due to overload on these smaller organs. The partial functional redundancy of these key processing organs in heterorhabdic species such as oysters and scallops may enhance their success in high-turbidity habitats.

Strengthening statistical usage in marine ecology

AbstractAlthough within their own disciplines, the statistical, social science, medical, and terrestrial ecology literatures are replete with accounts of the widespread misapplication and misuse of statistical testing and interpretation, awareness of these issues is weak among marine scientists who are not statisticians, but whose work is nonetheless situated within the expanse of marine ecology. Moreover, the major recent developments in statistical approaches in these fields are, as yet, poorly-represented in the marine ecological literature. We present a non-technical review of (1) the most fundamental, yet pervasive, problems concerning classical statistics, with suggestions for improved practice, (2) alternate, often more appropriate and intuitive, approaches to statistical design and interpretation, and (3) the crucial roles of reviewers, and especially of editors and editorial boards. It is hoped that increasing the awareness of these issues will strengthen statistical usage in marine ecology.

Variations in the pallial organ sizes of the invasive oyster, Crassostrea gigas, along an extreme turbidity gradient

AbstractSpatial size variations of labial palps, gills and the adductor muscle of the invasive feral oyster, Crassostrea gigas, were studied along two gradients of suspended particulate matter (SPM) concentrations in the temperate macrotidal Bourgneuf Bay, (annual mean SPM concentration gradient of 21.0–154.0 mg l−1) and the adjacent Loire Estuary (annual mean SPM concentration gradient of 24.1–630.4 mg l−1) on the French Atlantic Coast. The gill-to-palp (G:P) ratios decreased with increasing turbidity, both in the bay and the estuary. Changes in G:P ratios were chiefly related to palp area variations, increasing gradually from low turbidity to very high-turbidity sites, while gill area showed no clear relationship with turbidity conditions. The G:P ratio, showing a significant relationship (r2 = 0.97) with SPM concentrations, is proposed as a pallial organ index of oyster acclimation to turbidity conditions. The area of the striated part of the adductor muscle was always greater than that of the smooth one, and adductor muscle area tended to decrease when SPM concentration increased. These observations show the morphological capacity of the oyster C. gigas to tolerate SPM concentrations above the feeding cessation thresholds previously determined experimentally. They also suggest that pallial organ size variations could help explain the success of recent feral oyster invasions in temperate turbid ecosystems.

Fine-scale spatial distribution of the common lugworm Arenicola marina, and effects of intertidal clam fishing

Highlights•Arenicola marina spatial sampling data were geostatistically analyzed.•A reference site was compared to one subjected to long-term clam fishing.•Reference site shows two types of non-random distributions at different scales.•Fished site shows weaker aggregation and no regular distribution.•Attenuation of spatial pattern at the fished site may alter key biological processes.

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