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Showing 1 to 20 of 51 for “"stocking density"”.
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The effects of stocking density and housing on feed efficiency and growth performance of broiler chickens
… The research aimed at determining the effects of stocking density and housing type on broiler performance, welfare, and economic implications. High stocking density is a strategy used by broiler farmers to maximize floor space, but it can have adverse effects on chickens, including lower growth …
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Effect of stocking density at the feeding rack and social rank on the behaviour of Icelandic heifers
Overstocking of Icelandic dairy heifers with regard to the animal feeding place ratio has become more common during the last years. Rather little is known about the behavioural consequences for heifers of this management procedure, which imposes a competitive situation on the animals. The aim of …
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The effects of dietary forage, social hierarchy, and stocking density on stress in lactating cows during relocation
… effects of forage fiber, social hierarchy, and stocking density on stress in lactating cows during relocation to new dairy facilities. In experiment one, 23 lactating cows were fed a basal ration, or the basal ration plus grass or alfalfa hay at 10% of DM offered from 3 wk pre-move to 9 wk …
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Chicken or fish? Do environmental complexity and stocking density impact affective states of broiler chickens and rainbow trout?
… are housed in barren environments under high stocking densities, due to an emphasis on production efficiency. These monotonous housing conditions do not provide broilers or trout with the ability to perform functional, highly-motivated behaviors and increase their susceptibility to excessive …
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Stocking Density, Strain Performance, and Feeding Method Evaluation of Cage Reared Rainbow Trout (Salmo gairdneri) in Eastern South Dakota
… landowners for personal consumption. Maximum stocking density (fish/m3) was not determined. Densities greater than those used would have been needed to determine the optimum stocking rate. The use of a deeper culture cage (3 m) was justified in this area due to the high water temperatures that …
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The Effects of Stocking Density and Feeding Frequency on Aggressive and Cannibalistic Behaviors in Larval Hatchery-Reared Spotted Seatrout, <i>Cynosion nebulosus</i>
… the larval stages. </p> <p>The manipulation of stocking density as well as feeding frequency might be used to reduce aggression and cannibalism. The goal of this study was to determine the effects of stocking density and feeding frequency on aggressive and cannibalistic behaviors in larval …
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Harvest Efficiency, Forage Trampling, and Litter Decomposition of Mob Grazing
High stocking density “mob” grazing is a recent phenomenon that is being promoted by a few practitioners, but has not undergone rigorous scientific testing. Producers have claimed “mob” grazing can generate many benefits in terms of forage production and overall grassland health. The objective of …
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Movement and Mortality of White-tailed Deer in Southwest Minnesota
… limited permanent cover, high hunter density, high road density, low predator density, and large fluctuations in seasonal climate. These factors were significant influences on movement and mortality of deer in southwest Minnesota. Data from this study will be used to improve …
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Effect of the methanolic extract of Cassia abbreviata in the oxidative stress caused by overcrowding in indigenous chickens
… aim of this work was to assess the effect of the stocking density on the growth performance of indigenous chickens and to evaluate the effect of Cassia abbreviata extract on the oxidative stress in chickens caused by overcrowding. Phytochemical screening of Cassia abbreviata revealed the presence …
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Assessment of behaviour and egg production of laying hens kept in cages and floor systems on a commercial farm in South Africa
… and in different housing systems with different stocking densities. The study assessed the behaviour and production parameters of laying hens kept in cages and floor systems during daytime hours (7:00 AM to 3:00 PM), focusing on dustbathing, nesting, feather pecking, and perching behaviours, as …
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The cultivation of Ulva lactuca (chlorophyta) in an integrated aquaculture system, for the production of abalone feed and the bioremediation of aquaculture effluent
… both 12 and 20 volume exchanges per day, using a stocking density of 3 kgm·2 on both farms. Approximately 70 % of the ammonium is removed during the day and 60 % at night at JSP in both turbot and abalone treatments, while at I & J in the abalone treatments, 90 % and 80 % of the ammonium is …
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Influência de fatores ambientais na incidência do vírus da infecção hipodermal e necrose hematopoiética (IHHNV) no camarão Litopenaeus vannamei cultivado em fazendas do Estado do Rio Grande do Norte (RN)
… environmental factors as salinity, temperature, stocking density, dissolved oxygen and rainfall in the IHHNV incidence in L. vannamei grown in farms, in the RN state. To determine the IHHNV prevalence were used 1089 samples of L. vannamei collected in seven farms. To perform the study about the …
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The economic feasibility of introducing aquaculture into traditional farming systems in Arizona
… production system. Using budget analysis, a fish stocking density of six fish per cubic meter and a ditch capacity of 2,925 m3 appear to provide the optimal production scenario, if the percentage of fish reaching harvestable size is improved from 66 percent to at least 80 percent. This density has …
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The Survival and Growth of Fish in a Settled Industrial-Domestic Effluent
… (control) 50% and 100% effluent, when flow rate,stocking density, food supply and dissolved oxygen levels were controlled...
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Rangeland condition in the Tembe Traditional Area, Maputaland, KwaZulu-Natal, South Africa
… out of other people’s cultivated land. Overstocking the grazing area was not occurring at the time of the study as the stocking density was well below the area’s capacity. The general perception of the majority of the cattle owners was that their cattle were in a good condition. An analysis …
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The feasibility of a commercial-scale recirculating aquaculture system integrating sea urchins (Tripneustes gratilla) and seaweed (Ulva)
… to determine optimal T. gratilla basket depth, stocking density and quantification methodology to allow for the accurate prediction of T. gratilla nitrogen emissions. The literature indicates that production of various urchin species is reduced when cultivated in deeper baskets, in contrast to …
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Happy Chickens: Novel Physiological and Behavioral Measures of Cumulative Experience in Broilers and Laying Hens
… commercial laying hens are often barren, high-density environments with an emphasis on production efficiency. These housing conditions limit birds' ability to display species-specific behaviors, can negatively impact health, and may contribute to negative cumulative experience. Cumulative …
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Environmental impact of stocked Mulloway (Argyrosomus japonicus) in New South Wales estuaries
Studies were undertaken for estuarine stocking of mulloway Argyrosomus japonicus to develop efficient marking techniques; to identify key habitats and migratory patterns of stocked fish; to evaluate the diet and growth of stocked fish and recruitment to commercial fisheries; and to develop a …
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Modelling of Biomass Production Potential of Poplar in Short Rotation Plantations on Agricultural Lands of Saxony, Germany
… planted on arable Saxon land under different stocking densities. Empirical data collected from several experimental areas were used. Site productivity has been predicted depending on stand age and site variables using a two-step model. In step one age and site variables were used to model …
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