Louis D'Abramo - Academia.edu (original) (raw)

Papers by Louis D'Abramo

Research paper thumbnail of Showcasing Research Focusing on Sustainability of Aquaculture Enterprises and Global Food Security

Journal of the World Aquaculture Society, May 3, 2016

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Research paper thumbnail of Global Aquaculture 2050

Journal of the World Aquaculture Society, Feb 1, 2017

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Research paper thumbnail of Post-Harvest Handling and Processing

Freshwater Prawn Culture

... If this applies to freshwater prawns it might have an impact on the management of size variat... more ... If this applies to freshwater prawns it might have an impact on the management of size variation (see Chapter 16) and harvesting. ... According to Rowland et al. (1982), the 1980 US National Aquaculture Plan referred to the problem of M. rosenbergii texture. ...

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Research paper thumbnail of Lipid requirements of shrimp

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Research paper thumbnail of The effects of dietary saturated fat source on weight gain and adiposity are influenced by both sex and total dietary lipid intake in zebrafish

PLOS ONE, 2021

The effects of saturated fat intake on obesity and cardiovascular health remain inconclusive, lik... more The effects of saturated fat intake on obesity and cardiovascular health remain inconclusive, likely due in part to their varied nature and interactions with other nutrients. Investigating the synergistic effects of different saturated fat sources with other dietary lipid components will help establish more accurate nutritional guidelines for dietary fat intake. Over the past two decades, zebrafish (Danio rerio) have been established as an attractive model system to address questions regarding contributions of dietary lipid intake to diet-induced obesity in humans. The goal of the present study was to assess interactions of three different saturated fat sources (milk fat, palm oil, and coconut oil) with sex and total dietary lipid intake on weight gain and body composition in adult zebrafish. Larvae were raised on live feeds until 28 days post fertilization, and then fed a formulated maintenance diet until three months of age. An eight-week feeding trial was then initiated, in which...

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Research paper thumbnail of Climate change: Response and role of global aquaculture

Journal of the World Aquaculture Society, 2019

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Research paper thumbnail of Aquaculture Research Priorities for the Next Decade: A Global Perspective

Journal of the World Aquaculture Society, 2018

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Research paper thumbnail of Global Aquaculture 2050

Journal of the World Aquaculture Society, 2017

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Research paper thumbnail of Showcasing Research Focusing on Sustainability of Aquaculture Enterprises and Global Food Security

Journal of the World Aquaculture Society, 2016

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Research paper thumbnail of Feeding Larval Gulf Killifish: Total Replacement of Artemia Nauplii and Co‐Feeding from Hatch

North American Journal of Aquaculture, 2016

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Research paper thumbnail of Harvest of crayfish as an ecosystem service of wetlands compared to production systems with planted forage

Aquaculture Economics & Management, 2016

ABSTRACT Crayfish harvest as an ecosystem service of moist-soil wetlands in the Mississippi Alluv... more ABSTRACT Crayfish harvest as an ecosystem service of moist-soil wetlands in the Mississippi Alluvial Valley (MAV) was evaluated using estimates of crayfish yield and operational costs to create enterprise budgets. The average daily yield of crayfish was 2.13 lb/acre (95% CI = 1.19–3.00) and yield did not differ between wetlands dominated with Red Swamp Crayfish or White River Crayfish. Four hypothetical scenarios of harvest operations revealed annual costs associated with harvesting crayfish to be 163.89–370.75/acre.AlthoughthesecostswerelowerthanestimatedcostscurrentlyassociatedwithharvestingcrayfishfromfieldswithplantedforageinLouisiana(163.89–370.75/acre. Although these costs were lower than estimated costs currently associated with harvesting crayfish from fields with planted forage in Louisiana (163.89–370.75/acre.AlthoughthesecostswerelowerthanestimatedcostscurrentlyassociatedwithharvestingcrayfishfromfieldswithplantedforageinLouisiana(749.96/acre), a three-fold reduction in crayfish yield (lb/trap/day) from moist-soil wetlands resulted in an increase in the break-even selling price from 1.25/lbinLouisianato1.25/lb in Louisiana to 1.25/lbinLouisianato1.70–$3.86/lb in the MAV. Although this enterprise will likely not compete with the Louisiana rice-crayfish industry, harvesting crayfish from moist-soil wetlands may contribute to ecosystem services provided by wetlands and aid in the reduction of the quantity of crayfish products imported into the U.S. market.

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Research paper thumbnail of Contributor contact details

Shellfish Safety and Quality, 2009

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Research paper thumbnail of Production and Associated Economics of Channel Catfish Fed Different Practical Diets in the Fingerling–Stocker Phase of Culture

North American Journal of Aquaculture, 2008

Two practical diets that differed in cost based upon protein sources were evaluated as treatments... more Two practical diets that differed in cost based upon protein sources were evaluated as treatments relative to production and associated economics of the fingerling–stocker phase of culture for channel catfish Ictalurus punctatus. The commercially manufactured fingerling feeds contained approximately 35% crude protein and were fed to fingerling channel catfish (mean weight = 13.8 g; mean length = 12.2 cm, respectively) stocked into experimental earthen ponds (0.05 ha) at a density of 123,550 fish/ha. There were five replicates (ponds) per treatment. The fish were fed daily to satiation, unless some physical or biological factor warranted an abstention of one or more days. After 180 d, all ponds were harvested by seine and then completely drained. Mean individual harvest weight and length of fish fed the high-cost practical diet were significantly greater than those of fish fed the low-cost diet. Survival and feed conversion ratios were not significantly different between dietary treatment groups. The percentage of harvested fish exceeding 114 g, a size that escapes predation by cormorants Phalacrocorax spp., ranged from 47% to 56% for the low-cost treatment and from 72% to 77% for the high-cost treatment. Individual stocker production cost was US$0.217 for the low-cost dietary treatment and 0.258forthehigh−costtreatment.Economicanalyseswereusedtocomparethethree−phase(modular)productionscheme(whichincorporatedthetwodiet−dependentfingerling–stockermanagementscenarios)withthetraditionalmultiple−batchsystem(partialharvestandtoppingoff).Totalproductioncostsforthethree−phasesystemwere0.258 for the high-cost treatment. Economic analyses were used to compare the three-phase (modular) production scheme (which incorporated the two diet-dependent fingerling–stocker management scenarios) with the traditional multiple-batch system (partial harvest and topping off). Total production costs for the three-phase system were 0.258forthehigh−costtreatment.Economicanalyseswereusedtocomparethethree−phase(modular)productionscheme(whichincorporatedthetwodiet−dependentfingerling–stockermanagementscenarios)withthetraditionalmultiple−batchsystem(partialharvestandtoppingoff).Totalproductioncostsforthethree−phasesystemwere0.04–0.24 per kilogram less than those of the multiple-batch production system. Total cost of food fish production in the three-phase system ranged from 1.406(low−costdiet)to1.406 (low-cost diet) to 1.406(low−costdiet)to1.417 (high-cost diet) per kilogram. The fingerling–stocker phase offers a variety of management options to meet different production goals, and the three-phase system appears to be a cost-effective alternative management strategy for the farming of channel catfish.

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Research paper thumbnail of Distribution of euphausiid assemblages in the Mediterranean Sea

Marine Biology, 1972

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Research paper thumbnail of Effect of Stocking Weight and Stocking Density on Production of Hybrid Striped Bass (Sunshine) in Earthen Ponds in the Second Phase of a 2-Phase System

Journal of the World Aquaculture Society, 2004

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Research paper thumbnail of Lobster nutrition

CRC handbook of mariculture, 1983

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Research paper thumbnail of Evaluation of a Fingerling-to-Stocker Phase as Part of a New Production Strategy for the Commercial Farming of Channel Catfish

North American Journal of Aquaculture, 2007

ABSTRACT Within a three-phase production strategy for farming channel catfish Ictalurus punctatus... more ABSTRACT Within a three-phase production strategy for farming channel catfish Ictalurus punctatus, the second phase, fingerling to stocker production, was evaluated. A complementary economic analysis compared the cost of producing stockers, food-size fish net returns, and overall cost of production for a three-phase production system with that of the traditional multiple-batch system. Pond run fingerlings (mean length = 10.7 cm; mean weight = 10 g) were stocked into 0.05-ha experimental earthen ponds at densities of 98,840, 123,550, and 148,260 per hectare. They were fed floating fingerling feed with 36% crude protein to satiation during a 180-d grow-out period. At harvest, mean survival (63.7–72.6%) and mean feed conversion ratio (1.5–1.6) did not differ significantly among treatments. Mean harvested biomass (kg/ha) ranged from 5,766.5 to 9,135.6 and increased as density increased. Mean harvest weight (85.8–94.3 g) decreased as density increased but was not statistically different among treatments. Stocker cost of production was US$0.17, 0.18,and0.18, and 0.18,and0.22 per stocker for the highest, medium, and lowest initial fingerling stocking treatments, respectively. For the higher stocking rates, total food-size cost of production (variable and fixed costs) was 1.37/kg,whichwas1.37/kg, which was 1.37/kg,whichwas0.02/kg to $0.28/kg less than the production costs of food-size catfish in multiple-batch production systems. The mean harvest weight goal of 113.5 g was not achieved in any treatment, but a slightly larger fingerling stocking size combined with seasonal water temperatures should produce the desired weight for stocking into the third phase (final grow out) of production. The estimated production cost for the three-phase system appears to be less than that of the multiple-batch system. In addition, the three-phase system offers other advantages, such as better inventory control and minimal loss from bird depredation. This broad management concept has the flexibility to be modified to meet the needs of individual operations.

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Research paper thumbnail of Sustainable aquafeed and aquaculture production systems as impacted by challenges of global food security and climate change

Journal of the World Aquaculture Society

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Research paper thumbnail of Uso de la técnica del intestino invertido como un modelo de estudio de digestión y absorción en el atún aleta azul (Thunnus orientalis)

... 2008. Uso de la técnica del intestino invertido como un modelo de estudio de digestión y abso... more ... 2008. Uso de la técnica del intestino invertido como un modelo de estudio de digestión y absorción en el atún aleta azul (Thunnus orientali. ... 132 Conclusiones y Recomendaciones Este es el primer trabajo que describe la cinética de absorción de un pool de aminoácidos en ...

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Research paper thumbnail of Achieving sustainable aquaculture: Historical and current perspectives and future needs and challenges

Journal of the World Aquaculture Society

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Research paper thumbnail of Showcasing Research Focusing on Sustainability of Aquaculture Enterprises and Global Food Security

Journal of the World Aquaculture Society, May 3, 2016

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Global Aquaculture 2050

Journal of the World Aquaculture Society, Feb 1, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Post-Harvest Handling and Processing

Freshwater Prawn Culture

... If this applies to freshwater prawns it might have an impact on the management of size variat... more ... If this applies to freshwater prawns it might have an impact on the management of size variation (see Chapter 16) and harvesting. ... According to Rowland et al. (1982), the 1980 US National Aquaculture Plan referred to the problem of M. rosenbergii texture. ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Lipid requirements of shrimp

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The effects of dietary saturated fat source on weight gain and adiposity are influenced by both sex and total dietary lipid intake in zebrafish

PLOS ONE, 2021

The effects of saturated fat intake on obesity and cardiovascular health remain inconclusive, lik... more The effects of saturated fat intake on obesity and cardiovascular health remain inconclusive, likely due in part to their varied nature and interactions with other nutrients. Investigating the synergistic effects of different saturated fat sources with other dietary lipid components will help establish more accurate nutritional guidelines for dietary fat intake. Over the past two decades, zebrafish (Danio rerio) have been established as an attractive model system to address questions regarding contributions of dietary lipid intake to diet-induced obesity in humans. The goal of the present study was to assess interactions of three different saturated fat sources (milk fat, palm oil, and coconut oil) with sex and total dietary lipid intake on weight gain and body composition in adult zebrafish. Larvae were raised on live feeds until 28 days post fertilization, and then fed a formulated maintenance diet until three months of age. An eight-week feeding trial was then initiated, in which...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Climate change: Response and role of global aquaculture

Journal of the World Aquaculture Society, 2019

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Aquaculture Research Priorities for the Next Decade: A Global Perspective

Journal of the World Aquaculture Society, 2018

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Global Aquaculture 2050

Journal of the World Aquaculture Society, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Showcasing Research Focusing on Sustainability of Aquaculture Enterprises and Global Food Security

Journal of the World Aquaculture Society, 2016

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Feeding Larval Gulf Killifish: Total Replacement of Artemia Nauplii and Co‐Feeding from Hatch

North American Journal of Aquaculture, 2016

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Harvest of crayfish as an ecosystem service of wetlands compared to production systems with planted forage

Aquaculture Economics & Management, 2016

ABSTRACT Crayfish harvest as an ecosystem service of moist-soil wetlands in the Mississippi Alluv... more ABSTRACT Crayfish harvest as an ecosystem service of moist-soil wetlands in the Mississippi Alluvial Valley (MAV) was evaluated using estimates of crayfish yield and operational costs to create enterprise budgets. The average daily yield of crayfish was 2.13 lb/acre (95% CI = 1.19–3.00) and yield did not differ between wetlands dominated with Red Swamp Crayfish or White River Crayfish. Four hypothetical scenarios of harvest operations revealed annual costs associated with harvesting crayfish to be 163.89–370.75/acre.AlthoughthesecostswerelowerthanestimatedcostscurrentlyassociatedwithharvestingcrayfishfromfieldswithplantedforageinLouisiana(163.89–370.75/acre. Although these costs were lower than estimated costs currently associated with harvesting crayfish from fields with planted forage in Louisiana (163.89–370.75/acre.AlthoughthesecostswerelowerthanestimatedcostscurrentlyassociatedwithharvestingcrayfishfromfieldswithplantedforageinLouisiana(749.96/acre), a three-fold reduction in crayfish yield (lb/trap/day) from moist-soil wetlands resulted in an increase in the break-even selling price from 1.25/lbinLouisianato1.25/lb in Louisiana to 1.25/lbinLouisianato1.70–$3.86/lb in the MAV. Although this enterprise will likely not compete with the Louisiana rice-crayfish industry, harvesting crayfish from moist-soil wetlands may contribute to ecosystem services provided by wetlands and aid in the reduction of the quantity of crayfish products imported into the U.S. market.

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Research paper thumbnail of Contributor contact details

Shellfish Safety and Quality, 2009

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Research paper thumbnail of Production and Associated Economics of Channel Catfish Fed Different Practical Diets in the Fingerling–Stocker Phase of Culture

North American Journal of Aquaculture, 2008

Two practical diets that differed in cost based upon protein sources were evaluated as treatments... more Two practical diets that differed in cost based upon protein sources were evaluated as treatments relative to production and associated economics of the fingerling–stocker phase of culture for channel catfish Ictalurus punctatus. The commercially manufactured fingerling feeds contained approximately 35% crude protein and were fed to fingerling channel catfish (mean weight = 13.8 g; mean length = 12.2 cm, respectively) stocked into experimental earthen ponds (0.05 ha) at a density of 123,550 fish/ha. There were five replicates (ponds) per treatment. The fish were fed daily to satiation, unless some physical or biological factor warranted an abstention of one or more days. After 180 d, all ponds were harvested by seine and then completely drained. Mean individual harvest weight and length of fish fed the high-cost practical diet were significantly greater than those of fish fed the low-cost diet. Survival and feed conversion ratios were not significantly different between dietary treatment groups. The percentage of harvested fish exceeding 114 g, a size that escapes predation by cormorants Phalacrocorax spp., ranged from 47% to 56% for the low-cost treatment and from 72% to 77% for the high-cost treatment. Individual stocker production cost was US$0.217 for the low-cost dietary treatment and 0.258forthehigh−costtreatment.Economicanalyseswereusedtocomparethethree−phase(modular)productionscheme(whichincorporatedthetwodiet−dependentfingerling–stockermanagementscenarios)withthetraditionalmultiple−batchsystem(partialharvestandtoppingoff).Totalproductioncostsforthethree−phasesystemwere0.258 for the high-cost treatment. Economic analyses were used to compare the three-phase (modular) production scheme (which incorporated the two diet-dependent fingerling–stocker management scenarios) with the traditional multiple-batch system (partial harvest and topping off). Total production costs for the three-phase system were 0.258forthehigh−costtreatment.Economicanalyseswereusedtocomparethethree−phase(modular)productionscheme(whichincorporatedthetwodiet−dependentfingerling–stockermanagementscenarios)withthetraditionalmultiple−batchsystem(partialharvestandtoppingoff).Totalproductioncostsforthethree−phasesystemwere0.04–0.24 per kilogram less than those of the multiple-batch production system. Total cost of food fish production in the three-phase system ranged from 1.406(low−costdiet)to1.406 (low-cost diet) to 1.406(low−costdiet)to1.417 (high-cost diet) per kilogram. The fingerling–stocker phase offers a variety of management options to meet different production goals, and the three-phase system appears to be a cost-effective alternative management strategy for the farming of channel catfish.

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Research paper thumbnail of Distribution of euphausiid assemblages in the Mediterranean Sea

Marine Biology, 1972

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Effect of Stocking Weight and Stocking Density on Production of Hybrid Striped Bass (Sunshine) in Earthen Ponds in the Second Phase of a 2-Phase System

Journal of the World Aquaculture Society, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Lobster nutrition

CRC handbook of mariculture, 1983

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Evaluation of a Fingerling-to-Stocker Phase as Part of a New Production Strategy for the Commercial Farming of Channel Catfish

North American Journal of Aquaculture, 2007

ABSTRACT Within a three-phase production strategy for farming channel catfish Ictalurus punctatus... more ABSTRACT Within a three-phase production strategy for farming channel catfish Ictalurus punctatus, the second phase, fingerling to stocker production, was evaluated. A complementary economic analysis compared the cost of producing stockers, food-size fish net returns, and overall cost of production for a three-phase production system with that of the traditional multiple-batch system. Pond run fingerlings (mean length = 10.7 cm; mean weight = 10 g) were stocked into 0.05-ha experimental earthen ponds at densities of 98,840, 123,550, and 148,260 per hectare. They were fed floating fingerling feed with 36% crude protein to satiation during a 180-d grow-out period. At harvest, mean survival (63.7–72.6%) and mean feed conversion ratio (1.5–1.6) did not differ significantly among treatments. Mean harvested biomass (kg/ha) ranged from 5,766.5 to 9,135.6 and increased as density increased. Mean harvest weight (85.8–94.3 g) decreased as density increased but was not statistically different among treatments. Stocker cost of production was US$0.17, 0.18,and0.18, and 0.18,and0.22 per stocker for the highest, medium, and lowest initial fingerling stocking treatments, respectively. For the higher stocking rates, total food-size cost of production (variable and fixed costs) was 1.37/kg,whichwas1.37/kg, which was 1.37/kg,whichwas0.02/kg to $0.28/kg less than the production costs of food-size catfish in multiple-batch production systems. The mean harvest weight goal of 113.5 g was not achieved in any treatment, but a slightly larger fingerling stocking size combined with seasonal water temperatures should produce the desired weight for stocking into the third phase (final grow out) of production. The estimated production cost for the three-phase system appears to be less than that of the multiple-batch system. In addition, the three-phase system offers other advantages, such as better inventory control and minimal loss from bird depredation. This broad management concept has the flexibility to be modified to meet the needs of individual operations.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Sustainable aquafeed and aquaculture production systems as impacted by challenges of global food security and climate change

Journal of the World Aquaculture Society

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Uso de la técnica del intestino invertido como un modelo de estudio de digestión y absorción en el atún aleta azul (Thunnus orientalis)

... 2008. Uso de la técnica del intestino invertido como un modelo de estudio de digestión y abso... more ... 2008. Uso de la técnica del intestino invertido como un modelo de estudio de digestión y absorción en el atún aleta azul (Thunnus orientali. ... 132 Conclusiones y Recomendaciones Este es el primer trabajo que describe la cinética de absorción de un pool de aminoácidos en ...

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Research paper thumbnail of Achieving sustainable aquaculture: Historical and current perspectives and future needs and challenges

Journal of the World Aquaculture Society

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