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Catherine Fernandez - One of the best experts on this subject based on the ideXlab platform.

  • Effect of diet on the Biochemical Composition of Paracentrotus lividus (Echinodermata: Echinoidea) under natural and rearing conditions (effect of diet on Biochemical Composition of urchins)
    Comparative Biochemistry and Physiology - A: Comparative Physiology, 1997
    Co-Authors: Catherine Fernandez
    Abstract:

    The Biochemical Composition (expressed as % dry weight) of the test, gut and gonad of Parucentro-tus lividus was estimated. Sea urchin Biochemical Composition was studied in two natural populations of a coastal Mediterranean lagoon and in two rearing stations, one in open sea and one inland. Artificials feeds were administered to the reared urchins in order to evaluate variations in the Biochemical Composition of this species when prcjvided different food resources. The results reveal that, for the natural populations examined in this study, the Biochemical Composition of the gonad, gut, and test do not depend on food availability and, hence on the quantity of food consumed. The comparison between wild and reared sea urchin biochemistry reveala that organ Biochemical Composition is strongly influenced by the quality of the feed. The use of artificial feed containing kh meal (rich in protein), favours a storage of reserves in the gonad, the gut, and even in the test in the form of lipids and/car carbohydrates. This is true for both open sea and inland rearing. COMP HIOC'HEM PHYSIOL. I18A; 4:1377-1384, 1997. 0 1997 Elsevier Science Inc.

  • Effect of diet on Biochemical Composition of Paracentrotus lividus (Echinodermata: Echinoidea) under natural and rearing conditions.
    Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology, 1997
    Co-Authors: Catherine Fernandez
    Abstract:

    The Biochemical Composition (expressed as % dry weight) of the test, gut and gonad of Paracentrotus lividus was estimated. Sea urchin Biochemical Composition was studied in two natural populations of a coastal Mediterranean lagoon and in two rearing stations, one in open sea and one inland. Artificials feeds were administered to the reared urchins in order to evaluate variations in the Biochemical Composition of this species when provided different food resources. The results reveal that, for the natural populations examined in this study, the Biochemical Composition of the gonad, gut, and test do not depend on food availability and, hence on the quantity of food consumed. The comparison between wild and reared sea urchin biochemistry reveals that organ Biochemical Composition is strongly influenced by the quality of the feed. The use of artificial feed containing fish meal (rich in protein), favours a storage of reserves in the gonad, the gut and even in the test in the form of lipids and/or carbohydrates. This is true for both open sea and inland rearing.

  • Effect of diet on the Biochemical Composition of Paracentrotus lividus (Echinodermata: Echinoidea) under natural and rearing conditions (effect of diet on Biochemical Composition of urchins)
    Comparative Biochemistry and Physiology Part A: Physiology, 1997
    Co-Authors: Catherine Fernandez
    Abstract:

    The Biochemical Composition (expressed as % dry weight) of the test, gut and gonad of Paracentrotus lividus was estimated. Sea urchin Biochemical Composition was studied in two natural populations of a coastal Mediterranean lagoon and in two rearing stations, one in open sea and one inland. Artificials feeds were administered to the reared urchins in order to evaluate variations in the Biochemical Composition of this species when provided different food resources. The results reveal that, for the natural populations examined in this study, the Biochemical Composition of the gonad, gut, and test do not depend on food availability and, hence on the quantity of food consumed. The comparison between wild and reared sea urchin biochemistry reveals that organ Biochemical Composition is strongly influenced by the quality of the feed. The use of artificial feed containing fish meal (rich in protein), favours a storage of reserves in the gonad, the gut, and even in the test in the form of lipids and/or carbohydrates. This is true for both open sea and inland rearing.

Milva Pepi - One of the best experts on this subject based on the ideXlab platform.

  • Mediterranean Coastal Lagoons: The Importance of Monitoring in Sediments the Biochemical Composition of Organic Matter.
    International journal of environmental research and public health, 2019
    Co-Authors: Monia Renzi, Francesca Provenza, Sara Pignattelli, Lucrezia Cilenti, Antonietta Specchiulli, Milva Pepi
    Abstract:

    Transitional water ecosystems are targeted by the European Union (EU) Water Framework Directive (WFD, CE 2000/60) monitoring programs in coastal zones. Concerning sediments, activities performed for the WFD focus on a few variables concerning the Biochemical Composition of organic matter. Our research reports the effects of oxygen availability on the Biochemical Composition of organic matter in sediments to highlight levels of targeted variables in time and, according to the depth of sediment layer, both under oxygenated and anoxic conditions in a mesocosm study on sediment cores. Results provide evidence that tested factors of interest (i.e., disturbance type, oxygenic versus anoxic conditions; persistence time of disturbance, 0-14 days; penetration through sedimentary layers, 0-10 cm depth) are able to significantly affect the Biochemical Composition of organic matter in sediments. Large part of the variables considered in this study (total organic carbon (TOC), total phosphorous (TP), total sulphur (TS), Fe, carbohydrates (CHO), total proteins (PRT), biopolymeric carbon (BPC), chlorophyll-a (Chl-a) are significantly affected and correlated to the oxygenation levels and could be good early indicators of important changes of environmental conditions. Monitoring activities performed under WFD guidelines and management strategies of Mediterranean coastal lagoon ecosystems shall include the Biochemical Composition of organic matter in sediment to provide an exhaustive picture of such dynamic ecosystems.

M H Vermue - One of the best experts on this subject based on the ideXlab platform.

  • Effect of cooling in the night on the productivity and Biochemical Composition of Tetraselmis suecica
    Algal Research-Biomass Biofuels and Bioproducts, 2014
    Co-Authors: Michiel H A Michels, J. Camacho-rodríguez, M H Vermue
    Abstract:

    The effect of cooling at night on the 24 hour productivity and Biochemical Composition of Tetraselmis suecica cultivated in a tubular photobioreactor was determined. The hypothesis that cooling at night would decrease the night respiration rate and therefore enhance the net productivity was rejected. The productivity over a 24 hour period and Biochemical Composition were only influenced by the daily light input. Higher carbohydrate and lower protein content were observed in periods with more light. Carbohydrates produced during daylight were used for the protein synthesis at night, while the fatty acid content stayed constant during the day. The rate of carbohydrate loss at night was linearly related to the specific growth rate and therefore to the light history of the microalgae.

Slim Abdelkafi - One of the best experts on this subject based on the ideXlab platform.

  • Effects of nutritional conditions on growth and Biochemical Composition of Tetraselmis sp.
    Lipids in Health and Disease, 2017
    Co-Authors: Mouna Dammak, Bilel Hadrich, Ramzi Miladi, Mohamed Barkallah, Faiez Hentati, Ridha Hachicha, Céline Laroche, Philippe Michaud, Imen Fendri, Slim Abdelkafi
    Abstract:

    Background: This study aimed to maximize biomass concentration, biomass productivity and Biochemical Composition of the marine microalga Tetraselmis sp. Methods: In the current study, Box-Behnken Design was used to model the effect of NaNO 3 , NaH 2 PO 4 , metals and vitamins in the F/2 medium on the growth, total chlorophylls, carotenoids and starch contents. The total chlorophylls content was quantified by spectrophotometry. The FT-IR spectroscopy was used to estimate the Biochemical Compositions of Tetraselmis sp. grown under both optimized medium culture for starch production and standard culture medium.

Manuel Patiño - One of the best experts on this subject based on the ideXlab platform.

  • Growth Rate of the microalga Tetraselmis suecica changes the Biochemical Composition of Artemia species.
    Marine Biotechnology, 2001
    Co-Authors: Jaime Fábregas, Ana Otero, A. Domínguez, Manuel Patiño
    Abstract:

    The impact of different microalgal semicontinuous cultures on growth and Biochemical Composition in the next link of the food chain was tested using the filter feeder Artemia species as a model. The marine microalga Tetraselmis suecica was cultured semicontinuously with renewal rates between 10% and 50% and used to feed Artemia. Microalgal cultures maintained with a low renewal rate that had Biochemical Composition similar to that of the stationary-phase cultures commonly used in aquaculture produced poor growth and survival and low food-conversion efficiency compared to cultures maintained with a high renewal rate. Changes in the renewal rate in microalgal cultures also resulted in important changes in the gross Biochemical Composition of the filter feeder. The gross Biochemical Composition of the Artemia resembled that of the microalgae used as food except for total lipid content. The percentage of protein in the organic fraction of Artemia increased from 45% to 65% of the organic weight with increasing renewal rates in the microalgal cultures, while the carbohydrate percentage decreased under the same conditions. Higher renewal rates resulted in higher lipid percentages in the microalga, but in Artemia the percentage of lipids decreased from 19% of the organic weight with a renewal rate of 10%, to 13% with a renewal rate of 50%. The percentage of all polyunsaturated fatty acids in Artemia, including 20:5n-3, increased slightly with increasing renewal rates in the microalgal cultures. Results emphasize the importance of controlling microalgal nutritional value for the success of aquaculture food chains in which filter feeders are involved.