Laura Star

Laura Star
Schothorst Feed Research · Poultry team

About

30
Publications
8,739
Reads
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585
Citations
Citations since 2017
7 Research Items
308 Citations
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20172018201920202021202220230102030405060
20172018201920202021202220230102030405060
Introduction
Laura Star currently works at the Poultry team, Schothorst Feed Research, and as professor at the Applied Agricultural University Dronten.

Publications

Publications (30)
Article
Full-text available
Circular economic principals of production are based on material flows through the system with minimum external inputs, recycling of resources, generating minimum waste, emissions, or pollution. Agriculture presents a major opportunity for the utilization of wastes, by‐products and co‐products in the development of a circular economy via the design...
Article
Full-text available
Different combinations of gut health-promoting dietary interventions were tested to support broilers during different stages of Eimeria infection. One-day-old male Ross 308 broilers (n=720) were randomly assigned to one of six dietary treatments, with six pens per treatment and 20 birds per pen, for 35 days. At 7 days of age (d7), all birds were in...
Article
Full-text available
The aim of the study was to test the interaction between Thr and Gly in low crude protein (CP) diets in 7 to 28 d broilers on production performance and plasma metabolites. A total of 2,040 broilers were allocated to 17 treatments. A positive control (PC) diet (20.5% CP) was formulated to be adequate in dietary Thr and Gly. A negative control (NC)...
Article
Full-text available
Feather pecking is a key welfare challenge in laying hen husbandry. Feeding of live Hermetia illucens larvae could provide a possible solution to reduce feather pecking in hens. This research investigates effects of dispensing live H. illucens larvae to non-beak trimmed older laying hens on production performance, behavior and welfare. Control trea...
Conference Paper
Full-text available
Inclusion of insects in animal feed is promising for poultry behaviour and welfare. The aim of this study was to feed black soldier fly (BSF; Hermetia illucens ) larvae to Bovans Brown laying hens and to study the effects on pecking and foraging behaviours. Live BSF larvae were fed to hens from 20-36 wks of age. Four feeding treatments were used, w...
Conference Paper
Aim was to test the effect of a low crude protein (CP) diet with added L-tryptophan (Trp) and L-valine (Val) on production performance of Bovans Brown laying hens from 28 to 39 weeks of age. The trial was performed with five treatments and twelve replicates with twelve birds per replicate. Treatment 1 (positive control, PC) received a diet with 16....
Conference Paper
Full-text available
This trial was designed to study the interaction between Thr and Gly in 7-28d broilers. A total of 2,040 broilers were allocated to 17 treatments. A positive control (PC) diet (20.5% CP) was formulated to be adequate in essential AA. A negative control (NC) diet (18.5% CP, deficient in Thr and Gly) was supplemented with L-Thr and Gly to obtain a 4...
Article
It was hypothesized that P supply by feed in alternative housing systems can be lowered without negative effects on bone quality and production performance. Therefore, the objectives of the current study were 1) to update the retainable phosphorus (rP) needs of two modern laying hen breeds from 36 to 90 weeks of age housed in an aviary system, 2) t...
Article
Fosfor is een belangrijke voedingsstof voor leghennen, onder andere voor botontwikkeling en eivorming, maar speelt ook een grote rol bij milieubelasting. Onderzoek naar de fosforbehoefte van leghennen is gedateerd. Daarom is een onderzoek gestart naar de fosforbehoefte van de huidige leghennen. De moderne leghen met een hoge productie en goede legp...
Article
Full-text available
The objective of the current study was to determine the bioavailability of an organic zinc source (Availa-Zn) compared with zinc sulfate in a European-type broiler diet. A total of 480 one-day-old male Ross 308 broilers were housed in 48 digestibility cages (10 birds per cage), being randomly divided over 9 treatments. At d 3, the number of birds w...
Article
Full-text available
The aim of this study was to determine the threonine requirement of broilers during a subclinical Clostridium infection. Three experiments were performed: experiments 1 and 2 to investigate the dose-response of threonine supplementation during infection and experiment 3 to validate the threonine requirement during infection. In each experiment, 1-d...
Article
Full-text available
In dit rapport wordt voor de pluimveehouderij een overzicht gegeven van voermaatregelen, die een verlaging geven van de ammoniakemissie in traditionele stallen. Verder wordt in dit rapport ingegaan op mogelijkheden tot controle van deze voermaatregelen. Daarnaast zijn mogelijke positieve en negatieve neveneffecten van voermaatregelen op diergezondh...
Article
Full-text available
Effects of early life experience with climatic (heat) and hygienic [lipopolysaccharide (LPS)] stress on adaptability to the same stressors in later life were studied in laying hens. Chicks were exposed to 37 degrees C for 24 h at d 5 of age (n = 12) or were i.v.-administered once with 1 mg/kg of BW of LPS at 6 wk of age (n = 12), whereas a control...
Article
Full-text available
Effects of long-term climatic stress (heat exposure), short-term hygienic stress [lipopolysaccharide (LPS)], or a combination of both challenges on performance of 4 layer lines were investigated. The lines were earlier characterized by natural humoral immune competence and survival rate. At 22 wk of age, 80 hens per line were randomly divided over...
Article
Full-text available
Effects of long-term climatic stress (heat exposure), short-term hygienic stress [lipopolysaccharide (LPS)], or combined exposure to these stressors on endocrine and oxidative stress parameters of 4 layer lines (B1, WA, WB, and WF) were investigated. The lines were earlier characterized for natural humoral immune competence and survival rate. Eight...
Article
The combination of breeding for increased production and the intensification of housing conditions have resulted in increased occurrence of behavioral, physiological, and immunological disorders. These disorders affect health and welfare of production animals negatively. For future livestock systems, it is important to consider how to manage and br...
Article
Full-text available
Effects of long-term climatic stress (heat exposure), short-term hygienic stress [lipopolysaccharide (LPS)], or a combination of both challenges on the immune competence of 4 layer lines was investigated. The lines were earlier characterized for natural humoral immune competence and survival rate. Eighty hens per line were randomly divided over 2 i...
Article
Full-text available
The relation between survival and levels of humoral components of innate (and specific) immune competence of laying hens was investigated in a population of 1,063 laying hens from 12 purebred layer lines. Natural immune competence of the chickens was studied by measuring levels of natural antibodies (NAb) binding to keyhole limpet hemocyanin (KLH)...
Article
Full-text available
Immune modulation of poultry by airborne pathogen-associated molecular patterns (PAMP) was studied. White and Brown layer chicks were exposed intratracheally during 5 consecutive days at 7 wk of age with Escherichia coli-derived lipopolysaccharide (LPS), Saccharomyces cerevisiae-derived 1,3 beta-glucan (BGL), a combination of both, or PBS as a cont...

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