This study investigates the effects of toxic and non-toxic dinoflatellates on two sympatric bivalves, the clam Mulinia edulis and the mussel Mytilus chilensis. Groups of bivalves were fed one of three diets: (i) the toxic paralytic shellfish producing (PSP) Alexandrium catenella + Isochrysis galbana; (ii) the non-toxic Alexandrium affine + Isochrysis galbana and (iii) the control diet of Isochr...

Rotifers are widely used in hatcheries to feed small-sized aquatic larvae although one of their disadvantages is the lack zinc and selenium 5- 30-fold lower than copepods, respectively. To improve rotifers quality, different concentrations (2, 4, 5 10 mg L−1 each mineral) were added medium microalgae Isochrysis aff. galbana Nannochloropsis oculata for 4 days, then harvested concentrated rotifer...

Research was carried out into the effect of partial and total fishmeal (FM) replacement by a vegetable animal proteins blend, as well inclusion microalgae in diets for gilthead seabream (Sparus aurata L.). Fish 64 g on initial weight were fed until apparent satiation 88 days. The control diet (FM100) contained FM main protein source, whilst FM25, FM10 FM0 diets, replaced 75%, 90% 100%, respecti...

This work describes a method to model the optical properties over the (400-750 nm) spectral range of a dense microalgal culture using the chemical and physical properties of the algal cells. The method was based on a specific program called AlgaSim coupled with the adding-doubling method: at the individual cell scale, AlgaSim simulates the spectral properties of one model, three-layer spherical...

Clam spat Venerupis pullastra were fed for 4 wk on &ets of 2 species of microalgae supplied singly or mixed. Microalgae were Isochrysis galbana and Tetraselmis suecica, species normally used in bivalve hatcheries. Observed growth responses were high for mixed and I. galbana diets and intermediate for the T suecica diet. A slightly higher growth rate was obtained with the mixed diet than with th...

This study compared the growth and biomass production of Isochrysis galbana under hetero-, mixo-, and phototrophic conditions using different organic carbon sources. The growth of I. galbana was inhibited in heterotrophy but was enhanced in mixotrophy compared to that in phototrophy. Subsequently, the influences of organic carbon and environmental factors (light and salinity) on the growth of I...

This study focused on determining the effects of antibiotics on microalgae used as food for scallop larvae. Six different dose levels of chloramphenicol, erythromycin, and furazolidone were added to cultures of Isochrysis galbana and Chaetoceros gracilis. An in vivo experiment was subsequently conducted to determine the effect of chloramphenicol and erythromycin on larval survival of the Pacifi...