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Influence of periphyton substrates and rearing density on Liza aurata growth and production in marine nursery ponds ArchiMer
Richard, Marion; Maurice, Julien-thomas; Anginot, Aurore; Paticat, Francois; Verdegem, M. C. J.; Hussenot, Jerome.
The main objectives of this investigation were to test the effects of (i) the presence of periphyton substrates, (ii) rearing density and (iii) supplemental feeding with dry feed on the growth and production of golden mullet (Liza aurata) juveniles. Twenty-six 1 m(2)-cages were installed in a French marine pond from April till June 2008. Mullets were stocked in cages with or without substrate at a density of 0, 20,40 or 60 individuals per cage. Each treatment was carried out in triplicate. In addition, 20 fish were put in three tanks and fed ad libitum with dry feed. The results showed that (i) although mullets were seen to graze on periphyton substrates, their presence did not affect,mullet growth and production. In future studies, meshed substrates could...
Tipo: Text Palavras-chave: Periphyton; Mullet; Extensive aquaculture; Artificial substrate; Marine pond.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00029/14067/11614.pdf
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New developments in recirculating aquaculture systems in Europe: A perspective on environmental sustainability ArchiMer
Martins, C. I. M.; Eding, E. H.; Verdegem, M. C. J.; Heinsbroek, L. T. N.; Schneider, O.; Blancheton, Jean-paul; Roque D'Orbcastel, Emmanuelle; Verreth, J. A. J..
The dual objective of sustainable aquaculture, i.e., to produce food while sustaining natural resources is achieved only when production systems with a minimum ecological impact are used. Recirculating aquaculture systems (RASs) provide opportunities to reduce water usage and to improve waste management and nutrient recycling. RAS makes intensive fish production compatible with environmental sustainability. This review aims to summarize the most recent developments within RAS that have contributed to the environmental sustainability of the European aquaculture sector. The review first shows the ongoing expansion of RAS production by species and country in Europe. Life cycle analysis showed that feed, fish production and waste and energy are the principal...
Tipo: Text Palavras-chave: Intensive systems; Ecological impact; Waste; Water re-use; Denitrification.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00021/13190/10273.pdf
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Submersion time, depth, substrate type and sampling method as variation sources of marine periphyton ArchiMer
Richard, Marion; Trottier, C.; Verdegem, M. C. J.; Hussenot, Jerome.
Periphyton is an additional food source in African and Asian brackish and freshwater fish ponds. The present study was a preliminary assessment of periphyton development on artificial substrates in temperate marine ponds. The effects of submersion time, substrate type, water depth, and total or partial sampling methods on the quantity and quality of periphyton collected, were evaluated. Four types of substrate (W: wooden poles, S: smooth fiber-glass strips, m: mosquito screen (1 mm-mesh) and M: garden netting (5 mm-mesh)) were deployed in a marine pond, and periphyton was collected 15 and 30 days later. The total amount of periphyton per substrate unit was collected as one sample or as 5 sub-samples. Results showed that (i) periphyton biomass in a marine...
Tipo: Text Palavras-chave: Aquaculture; Marine pond; Artificial substrate; Fouling; Periphyton.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-7422.pdf
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