Publications by authors named "Jean Luc Hornick"

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  • * Three distinct types of breeders were identified based on herd size and breeding practices, with most housing being traditional and free-ranging, and nutrition primarily from fodders and food scraps.
  • * Health challenges like disease and predation were significant issues, yet guinea pig breeding served as an important income source for households, suggesting potential improvements in techniques and the formation of economic groups could enhance food security.
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This study aimed to determine the effects of air sac injection of rosemary essential oil at different concentrations in ovo in quail eggs on hatching rate, relative chick weight at hatching, and embryonic mortality rate. A total of 1060 Japanese quail eggs were divided into four groups: negative control (non-injected), positive control (30 µL sterile distilled water/egg), and two treated groups with 1 and 3 µL oil/egg, respectively. The concentration of 3 µL/egg showed a toxic effect on embryonic development, as revealed by the significantly ( = 0.

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  • - The study investigated how dietary supplementation with green tea by-products (GTBP) affects blood parameters, growth performance, carcass characteristics, and meat quality in finishing pigs over a 10-week period.
  • - Four dietary treatments were tested, including a control diet and three experimental diets with varying GTBP levels, but no significant differences were found in daily feed intake or growth rates; however, backfat thickness decreased with higher GTBP.
  • - Results showed that GTBP supplementation improved pork quality by reducing cholesterol and increasing protein and omega-3 content, suggesting it could be beneficial for pig health and meat quality without negatively affecting performance.
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Sulla flexuosa ( L.) is an endemic legume growing in some Mediterranean areas in rainfed and cold mountainous conditions. It could be used in goat diets as an alternative protein source instead of alfalfa to supplement forest rangeland.

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The recent development of advanced electronic sensors to monitor and record animal grazing activity provides a real opportunity to facilitate understanding of their behavioral responses. This study aimed to characterize the grazing activity and protein−energy requirements of grazing dairy goats in a Mediterranean woodland in northern Morocco by combining two sensors, the Global Positioning System (GPS) and three axis accelerometers. An experiment was conducted in a representative woodland with eight dairy goats.

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In Senegal, sheep breeds have adapted to their environment and play a key socio-economic role. This study aimed to explore the genetic diversity and structure of four Senegalese sheep breeds (Peul-peul, Djallonke, Touabire, and Ladoum) and their relationships with global sheep breeds. To that end, forty-seven sheep were genotyped using the OvineSNP50 BeadChip, and these genotypic data were analysed with those of 73 sheep breeds representative of worldwide ovine diversity (2729 animals).

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In dairy farms automatic milking systems and grazing, traffic to the robot is the cornerstone of profitability as higher milking frequency enhances milk yield. In this study, we investigated whether shortening the minimum milking interval (MMI), i.e.

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  • The study investigates the gut microbiota of the endangered Barbary macaque for the first time, examining the effects of tourist food provision on these bacterial communities.
  • Researchers collected 12 faecal samples from two groups: one exposed to tourist food and one that fed in the wild, and analyzed the bacterial composition using DNA sequencing.
  • Results indicated that tourism dramatically altered the macaques' gut microbiota, likely due to a low-fiber diet from human food, which could negatively affect their overall health.
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The Global Positioning System (GPS) and sensors technologies are increasingly used to study the grazing behavior of animals. This work was conducted to understand the grazing behavior and energy balance of goats browsing in forest rangeland using GPS and sensors technologies. Forage availability was estimated using the quadrat method during three grazing seasons.

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  • The study tested the impact of replacing soybean oil with sacha inchi oil, both with and without a medicinal plant supplement, on broiler chickens.
  • Results showed that while the different diets did not significantly affect overall chicken growth or meat quality, the inclusion of sacha inchi oil and the plant supplement increased the omega-3 fat content in the breast meat.
  • Additionally, the diet with sacha inchi oil and the plant supplement led to lower cholesterol levels in the meat compared to the traditional soybean oil diet.
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The olive cake (OC) and the cactus cladodes (CC) are two alternative feed resources widely available in the southern Mediterranean region that could be used in ruminants' diet. Their impact on the rumen bacterial ecosystem is unknown. This work aims to evaluate their effects on the microbial community and meat fatty acids of goat's kids.

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Background And Aim: Alternative natural materials to antibiotics for improving digestive health and growth performance are needed due to strengthening regulations related to the use of antibiotic growth promoters. The study aimed to evaluate the effects of medicinal plants mixture (60% L., 15% L.

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The aim of this study was to investigate the effect of meal (TM) and/or olive leaf powder (OL) supplementation to quail diet on animal performance, carcass yield and some blood parameters. One hundred and forty-four 1-day-old Japanese quails (body weight: 29.9 ± 0.

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Forest rangelands contribute largely to goat diets in the Mediterranean area. Information about browsed plant quality is essential for adequate feeding management. The purpose of this study was to evaluate the temporal changes in chemical composition and in vitro digestibility of the main plant species selected by goats in the Southern Mediterranean forest rangeland during two consecutive years; these were very contrasted (dry and wet).

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  • This paper examines how physiological factors like lactation stage and parity affect milk yield and composition, focusing on milk and blood fatty acid concentrations, blood metabolites, and hormones in early lactation cows.
  • The study involved 32 Holstein cows from five Belgian farms and analyzed their milk and blood samples during the first 150 days of lactation while they were fed a normal grass silage-based diet.
  • Findings indicate that as lactation continues, certain milk fatty acids and blood metabolites change significantly, revealing greater body reserve mobilization in first-time mothers compared to those who have lactated before.
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This study aimed at evaluating the impact of a diet supplemented with leaves on the productive performance and gastrointestinal parasites (GI) eggs/oocysts shedding of sheep (Pelibuey breed). Twenty-two non-lactating ewes were used. They were randomly allocated to two similar groups in terms of age, weight, body condition score (BCS), and GI parasites status.

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The aim of this study was to further develop and extensively describe a surgical technique in order to realise long-term fetal blood sampling in the bovine species. Eleven Holstein-Friesian 6- to 8-month pregnant cows (4-10 years old) were used for this study. Gestational age on the day of surgery varied from approximately 180 days (n = 1) to 240 days (minimum: 232 days, maximum 252 days; n = 10).

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  • Over 25% of dairy farms globally use automatic milking systems (AMS), prompting research on integrating AMS with grazing practices due to benefits for animal welfare and production costs.
  • A meta-analysis of 43 studies revealed that pasture-based AMS often leads to lower milking frequency (MF) and subsequently lower milk yield (MY), particularly in systems where grazed grass is a primary diet component.
  • Management strategies that maintain higher MF and MY involve supplementing cow diets with concentrates or mixed rations, which vary based on geographic and climatic conditions.
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  • - This study compared the digestive and metabolic traits of Sahelian (S) and Majorera (M) goat breeds using six lactating females from each breed under controlled feeding conditions.
  • - Majorera goats showed higher dry matter intake, energy intake, and milk energy output compared to Sahelian goats, although both breeds had similar nutrient digestibility and energy conversion efficiency.
  • - The findings suggest that while Majorera goats produce more milk and consume more feed, they are more reliant on nutrient-dense diets and have lower urinary nitrogen excretion than Sahelian goats.
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The objective of this work was to observe the effect of three different dry-period diets on blood metabolites ( = 9) and the production and fatty acid (FA) profile of milk ( = 19) in the peripartum period. In this study, 32 Holstein dairy cows, during their dry period, were divided in 3 different diet groups, as follows: the CONC diet (n = 11) was based on concentrate meal and straw, the CORN diet (n = 11) was based on corn silage, and the MIXED diet (n = 10) was based on corn and grass silages. According to our results, the variations of C18:2n-6, C18:3n-3, non-esterified fatty acid (NEFA), NEFA/cholesterol ratio, and albumin were significantly ( < 0.

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Mediterranean forest rangelands offer an important feed source for goats. Concerns about grazing strategies and management schemes in order to ensure the rangeland sustainability of Southern Mediterranean forest have revived interest in the foraging behavior of goats. This study was conducted to investigate the seasonal changes of feeding behavior of grazing goats in the Southern Mediterranean forest rangeland of Northern Morocco during two consecutive years beginning in 2016.

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  • The study aimed to assess how different levels of wet rice distillers' by-product (RDP) in pig diets impact growth, nutrient digestibility, blood profiles, and gut microbiome in weaned piglets.
  • 48 castrated male piglets were divided into three groups receiving diets with varying RDP levels (0%, 15%, and 30%) over 35 days, using chromium oxide to measure digestibility.
  • Results showed that higher RDP levels improved daily weight gain and feed efficiency, but altered gut microbiota and reduced some blood parameters, indicating a complex interaction between RDP levels and piglet health.
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Objective: This study aims at investigating the productive performance, metabolic, and hematological profiles of Algerian local rabbits does during their first pregnancy and according to dietary protein content.

Materials And Methods: A total of 52 nulliparous rabbit does, 3,116 ± 72.9 g live weight, were allocated individually to three groups (17/18 females per group) being on isoenergetic diets [2,600 kcal Digestible Energy (DE)/kg] that differ in their digestible protein content by 15%, 17%, and 19%, respectively, for L, M, and H diets.

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The aim of this study was to evaluate the effects of diets containing rice distillers' by-product (RDP) on growth performance, carcass characteristics, meat quality, and gut microbiota of fattening pigs. Twenty-four crossbred finishing pigs (Duroc × Landrace × Yorkshire), 56.9 ± 3.

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In South-East Asia, rice distillers' by-product (RDP) is a widely abundant feedstuff whose adequate incorporation into pig diets is still questionable. Especially, effects of RDP on nutrient digestibility of growing pigs fed corn-soybean meal-based diet are lacking. The objective of this study was to determine nutrient digestibility and energy value of ordinary (ORDP) and glutinous (GRDP) rice distillers' by-product in growing pigs.

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