Effects of 12 factors on burbot Lota lota (L., 1758) weaning performances using fractional factorial design experiment

Trabelsi, Awatef; Gardeur, Jean-Noël; Teletchea, Fabrice; Fontaine, Pascal

doi:10.1016/j.aquaculture.2011.03.027

Cited by 34 publications

(39 citation statements)

References 41 publications

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“…The principle of these systems is the use of multiple spatial niches and, in aquaculture, asynchronicity of biological rhythms between species (Trabelsi et al, 2011) to minimize competition. This opens a wide range of possibilities that need to be explored, either experimentally or by modeling, to determine the species combinations, ratios and management strategies offering the greatest farm-scale production, health Dumont, González-García, Thomas, Fortun-Lamothe, Ducrot, Dourmad and Tichit and environmental benefits (I24).…”

Section: Design and Evaluation Of Apsmentioning

confidence: 99%

Forty research issues for the redesign of animal production systems in the 21st century

Dumont

García

Thomas

et al. 2014

Animal

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Agroecology offers a scientific and operational framework for redesigning animal production systems (APS) so that they better cope with the coming challenges. Grounded in the stimulation and valorization of natural processes to reduce inputs and pollutions in agroecosystems, it opens a challenging research agenda for the animal science community. In this paper, we identify key research issues that define this agenda. We first stress the need to assess animal robustness by measurable traits, to analyze trade-offs between production and adaptation traits at within-breed and between-breed level, and to better understand how group selection, epigenetics and animal learning shape performance. Second, we propose research on the nutritive value of alternative feed resources, including the environmental impacts of producing these resources and their associated non-provisioning services. Third, we look at how the design of APS based on agroecological principles valorizes interactions between system components and promotes biological diversity at multiple scales to increase system resilience. Addressing such challenges requires a collection of theories and models (concept-knowledge theory, viability theory, companion modeling, etc.). Acknowledging the ecology of contexts and analyzing the rationales behind traditional small-scale systems will increase our understanding of mechanisms contributing to the success or failure of agroecological practices and systems. Fourth, the large-scale development of agroecological products will require analysis of resistance to change among farmers and other actors in the food chain. Certifications and market-based incentives could be an important lever for the expansion of agroecological alternatives in APS. Finally, we question the suitability of current agriculture extension services and public funding mechanisms for scaling-up agroecological practices and systems.

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Section: Design and Evaluation Of Apsmentioning

confidence: 99%

Forty research issues for the redesign of animal production systems in the 21st century

Dumont

García

Thomas

et al. 2014

Animal

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“…However, the survival rate was variable ranging from 58% to 78% and the artificial dry feed optimal for weaning was not defined. Trabelsi, Gardeur, Teletchea, and Fontaine (2011) investigated the effect of 12 environmental and feeding related factors on L. lota weaning performances using fractional factorial design. Low water salinity, the mode of dry feed administration, and a long weaning period significantly increased the survival rate (Trabelsi, Gardeur, Teletchea, & Fontaine, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Trabelsi, Gardeur, Teletchea, and Fontaine (2011) investigated the effect of 12 environmental and feeding related factors on L. lota weaning performances using fractional factorial design. Low water salinity, the mode of dry feed administration, and a long weaning period significantly increased the survival rate (Trabelsi, Gardeur, Teletchea, & Fontaine, 2011). Wocher, Harsányi, and Schwarz (2012) reported that weaning of L. lota was possible only with a specific feed type and the specific growth rate was 9.7% day -1 and the survival rate 13.5%.…”

Section: Introductionmentioning

confidence: 99%

Weaning of Burbot, Lota lota (L.) from Live to Dry Feed Using NaCl as Dietary Attractant

Lahnsteiner¹,

Kletzl²

2017

JAS

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Weaning of 150 days post hatch Lota lota from live feed (zooplankton) to formulated dry feed (FDF) was investigated. L. lota could not be forced from live feed to FDF. They refused FDF for periods up to 21 d. Body mass decreased for 20%, condition factor for 15%, and hepatosomatic index for 50%. In 21 days lasting co-feeding experiments with FDF and live feed L. lota selected exclusively the live feed organisms. NaCl in a concentration of 5% was a dietary feeding attractant for L. lota. When FDF was supplemented with 5% NaCl, L. lota could be abruptly weaned from live to dry feed. During a 21 d lasting experiment body mass increased for circa 40%, total length for 10%, condition factor for 5% and hepatosomatic index remained constant. These values were similar to live zooplankton feeding. However, increased mortality of > 20% was recorded for fish fed with the 5% NaCl containing FDF. To reduce mortality FDF was supplemented with zooplankton meal to upgrade its quality and extruded to optimize its density and sedimentation rate. With the adjusted FDF mortality rates were reduced to < 5%. Using the optimized dry feed easy and sustainable weaning protocols were developed where NaCl and zooplankton meal were gradually reduced to adapt fish to pure FDF.

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“…Therefore, the knowledge of the biology of the first days of the burbot larvae life may be crucial for effective intensive larviculture of the species. Especially, ineffective procedures applied in the first days of life may affect growth differentiation and in consequence may lead to increased level of cannibalism, which is very problematic in the case of burbot (Jensen et al 2011;Trabelsi et al 2011) similar to other predators (Baras et al 2003). The published data include a series of studies related to rearing larvae of this species under controlled conditions.…”

mentioning

confidence: 99%

“…Currently, mainly due to river regulations, over-fishing, thermal anomalies and pollutions, the burbot has become an endangered species over almost the entire area of its occurrence (Lauri et al 1998;Kjellman and Eloranta 2002;Kjellman 2003;Hardy et al 2008). The constantly decreasing size of the burbot population in the natural environment and the rapidly increasing interest in intensive aquaculture of this species (due to the high price, liver considered as a delicacy and tasty boneless flesh) created the urgent need for development of effective procedures of production of fry under controlled conditions (Wolnicki 2001;Wolnicki et al 2002;Harzevili et al 2003;_ Zarski et al 2009_ Zarski et al , 2010Jensen et al 2011;Trabelsi et al 2011;Wocher et al 2011).…”

mentioning

confidence: 99%

Dynamics of yolk sac and oil droplet utilization and behavioural aspects of swim bladder inflation in burbot, Lota lota L., larvae during the first days of life, under laboratory conditions

et al. 2013

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The study concerns investigation of early larval development of burbot, Lota lota. As part of a two-year study, the first 15 days (until the end of yolk sac resorption) of burbot larvae development under controlled conditions were examined. The aim of the study was to observe the moment of swim bladder inflation and the behavioural aspects of this process, as well as the analysis of yolk and oil droplet resorption and the beginning of exogenous nutrition. It was observed that larvae began to inflate their swim bladder on the 3rd day posthatch. On 5 DPH, none of the larvae without an inflated bladder was able to swim up the distance separating it (10 cm) from the water surface. Since 9 DPH, 50 % of larvae started exogenous feeding, and the absence of yolk was observed on 13 DPH and oil droplet on 14 DPH, while on 15 DPH, 100 % of feeding larvae were observed. The presented results indicate that the analyzed period is critical for burbot, and it is characterized by a high mortality rate (over 60 %). Additionally, the results suggest that, under controlled conditions, the latest moment when burbot larvae should be given exogenous food is 9-10 DPH and until the moment of the swim bladder inflation, larvae should be kept in tanks with a low water depth (up to 10 cm). The data presented in this study could have a significant influence on the efficiency of larvae rearing, both for aquaculture and for restocking purposes.

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Effects of 12 factors on burbot Lota lota (L., 1758) weaning performances using fractional factorial design experiment

Cited by 34 publications

References 41 publications

Forty research issues for the redesign of animal production systems in the 21st century

Forty research issues for the redesign of animal production systems in the 21st century

Weaning of Burbot, Lota lota (L.) from Live to Dry Feed Using NaCl as Dietary Attractant

Dynamics of yolk sac and oil droplet utilization and behavioural aspects of swim bladder inflation in burbot, Lota lota L., larvae during the first days of life, under laboratory conditions

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