Fabiano Dahlke

• PhD in Animal Science
• Associate Professor at SANTARÉM POLYTECHNIC UNIVERSITY

Context There are pre-hatch factors that can influence performance during the growing phase, such as the egg size and breeder age. Aims Investigate the influence of egg weight and flock age separately on egg characteristics, hatching traits, hatchling weight, and initial offspring performance. Methods Treatments consisted of eggs laid by 28-week-...

The objective of this study was to evaluate the influence of an enzymatic association between phytase and xylanase on the production performance of commercial laying hens reared in cage free system during a complete cycle. A total of 840 Hy-Line Brown laying hens were used from 23 to 88 weeks of age and distributed in a completely randomized design...

The objective of this study was to evaluate the effect of storage time on albumen quality, incubation yield, and hatch window in Pekin ducks (Anas boschas). A total of 1302 eggs were randomly distributed to seven treatments according to the storage time with durations ranging from 1 to 14 days. Each treatment consisted of 186 eggs with a two-day st...

This study aimed to evaluate the quality of free-range eggs stored at room temperature and coated with different levels of cassava starch. A total of 255 fresh eggs coated with a cassava starch solution at the levels of 0, 1, 3, or 5% were used. The eggs remained stored for 28 days at room temperature. The experimental design was completely randomi...

We compared broiler chicken welfare in free-range (FR) and intensive indoor (IN) systems using the Welfare Quality® Protocol. Ten FR and 11 IN farms in Brazil were assessed. Results are shown as either scores ranging from 0 to 100, where higher scores indicate better welfare, or prevalence, where lower prevalence indicates better welfare. In FR, th...

The study aimed to evaluate a commercial blend of functional oils based on liquid from the cashew nutshell and castor oil as a growth promoter in newly weaned piglets. A total of 225 piglets, castrated males and females with 28 days of age were randomly distributed in pens with 15 animals composing three treatments and five repetitions. The treatme...

Ozone gas (O3) is used as an oxidizing agent and can be applied as a sanitizer to control microorganisms and degrade toxic compounds, such as pesticides and mycotoxins, in food industries. Some studies investigated the use of O3 as an agent to reduce pathogenic bacteria such as Salmonella enteritidis. The action of O3 on the eggshell cuticle and st...

Sodium hexametaphosphate binds with calcium present in saliva, preventing dental plaque mineralization. It is widely used in commercial snacks for dogs to aid oral health. Some botanical extracts and propolis reduce halitosis and gingival inflammation by limiting bacterial proliferation. Thus, the aims of this study were to develop baked biscuits u...

INRAPORC® is a mechanistic, dynamic, and deterministic model system that is used in commercial pig production. However, its use is limited as it requires performance information for animals under ad libitum (AL) feed management, which is not provided at all stages of production. Verification of the INRAPORC® calibrations were conducted in this inve...

Decontamination methods of egg change according to the different countries. However, this practice is extremly important, because there may be contamination by a wide range of micoorganisms. In free-range raising systems, in addition to being exposed to the pathogenic microorganisms, hens may be also exposed to a different kinds of fungy, both fiel...

The study aimed to evaluate a commercial blend of functional oils based on liquid from the cashew nutshell and castor oil as a growth promoter in newly weaned piglets. A total of 225 piglets, castrated males and females with 28 days of age were randomly distributed in pens with 15 animals composing three treatments and five repetitions. The treatme...

The present study aimed to compare the composition on the label of dry complete food for adult cats with the nutritional composition determined by chemical analysis, to determine the occurrence of aflatoxins, and to list the most used ingredients. The determined parameters were: crude protein (CP), ether extract in acid hydrolysis (EEA), mineral ma...

During the food production process, qualitative losses are caused by biological contaminants (fungi, mycotoxins, and insects) and chemical contaminants (pesticide residues), widely found in grain storage. Several species of fungi, when they find ideal conditions for their development in the silos, cause damage to the grains (clod formation, grain h...

The objective of this study was to evaluate the effect of supplementation with 100ppm sodium monensin or 0.15% of a blend of functional oils (cashew nut oil + castor oil) on the intestinal microbiota of broilers challenged with three different Eimeria spp. The challenge was accomplished by inoculating broiler chicks with sporulated oocysts of Eimer...

Poultry litter has been utilized to accommodate the birds, providing comfort, depriving the animals of direct contact with excretions and with the floor, also to avoid temperature variation inside the poultry house. However, it provides shelter, hiding place and food for some insects and mites, especially ectoparasites, the principal pests present...

Eggshell exposure to both, field and storage toxigenic fungi, is of concern due to their possible metabolites transmission into the inner egg. The presence of fungi contamination in the nests environment, is expected due to its substrate, optimal temperature and humidity.In addition, the age of hens and eggshell increasing pore numbers together wit...

The size of particles of feed and ingredients is important in the regulation of food intake and consequently the performance of broilers. Similarly the presence of oil in the diet can stimulate feed intake and improve the productive characteristics of birds. It was studied the influence of texture (DGM) of the diet (360 μm, 473 μm, or 768 μm) and l...

The size of particles of feed and ingredients is important in the regulation of food intake and consequently the performance of broilers. Similarly the presence of oil in the diet can stimulate feed intake and improve the productive characteristics of birds. It was studied the influence of texture (DGM) of the diet (360 μm, 473 μm, or 768 μm) and l...

Contamination and biodegradation changes of poultry litter that may occur during the breeding stages of poultry and may affect chicken health and meat product safety have been studied. The living organisms most isolated period were insects (mainly Alphitobius sp. and Liposcelis sp.), mites (Acarus sp. and Dermanyssus sp.) and fungi (Trichoderma sp....

Poultry companies develop technical standards in which insecticides from the Pyrethroid Group are used to control insects and ectoparasites in aviary environment. This work presents an investigation through scanning electron microscopy on the macrofauna identification that develops in the poultry house. Although those living organisms are not harmf...

The objective of this study was to access/identify the effects of phosphorus (P) restriction as a result of non-inclusion of monocalcium phosphate on broiler's diet after 21 d of age and the use of high doses of phytase (PHY). Broilers were divided into 4 treatments: positive control (PC), with phosphate inclusion; with phytase (WPHY), a reduction...

The effect of glutamine on the structure of the intestinal mucosa, after suffering any damage is raising interest due to the fact that this amino acid is the main metabolite which nourishes the enterocytes. Yet, the mechanism that promotes proliferation of the intestinal cells is not well known. It might be related with two events: increase of Na ⁺...

Chicken (Gallus gallus domesticus L.) cuts yield of wing (drummette / middle joint / tip), breast (fillet / tenderloin) and leg (drumstick / thigh / feet) of two specific hybrids (Cobb 500 Slow - CB-Slow and Hubbard Flex - HB-Flex) were evaluated. A total of 150 birds of each hybrid (grown in separate sheds under same management) were utilized for...

Dried distillers grains with soluble (DDGS) are co-products of the ethanol industry using corn as a feedstock. Because of its nutritional composition with high content of protein and fiber, combined with low cost, DDGS has been used in animal feed production, although still little known in Brazil for this application, as well as in humans for food....

Over the past years, turkey meat has gained a prominent position in the global market. As lysine (Lys) is among the main essential amino acids (AA) for protein deposition in the carcass, defining Lys requirements can contribute to improving the performance and carcass yield of turkey for meat production. Thus, the objective of this study was to eva...

An experiment was conducted to test the hypothesis that a coarse limestone diet improves productivity, reproductive performance and the calcium utilization of molted broiler breeders. In total, 640 broiler breeder females, 73-week-old and sixty-four 27-week-old cockerels, Cobb 500, were evaluated during 10 weeks, according to a randomized block des...

The aim of this study was to evaluate the possible effects of glutamine and broiler breeder age on the development of intestinal mucosa in broiler chicks during first week of age. For this purpose, 32 one-day-old broiler chicks were distributed according to a completely randomized experimental design in a 2 × 2 factorial arrangement. Treatments con...

The present study aimed to evaluate the effect of thermal processing, press throughput and roller-die gap on pellet physical quality, protein solubility and starch gelatinization in a corn-soybean based broiler diet. The different processing factors were combined in a 2 × 5 × 3 factorial arrangement with eight randomized block consisting of eight p...

An experiment was conducted to test the hypothesis that a coarse limestone diet improves productivity, reproductive performance and the calcium utilization of molted broiler breeders. In total, 640 broiler breeder females, 73-week-old and sixty-four 27-week-old cockerels, Cobb 500, were evaluated during 10 weeks, according to a randomized block des...

This study evaluated the effect of different dietary vitamin E levels and different selenium sources on the productive and reproductive performance of broiler breeders. In total 640 females and 64 males between 22 and 52 weeks old were studied. A completely randomized experimental design in factorial arrangement, with 4 treatments of 8 replicates w...

Pelleting is the most popular thermal processing technique in poultry industry. Birds fed pelleted diets have greater feed intake and weight gain, and better feed conversion ratio. However, this better performance can only be achieved, if the pellets remain intact until they are ingested by the birds. Many factors may affect pellet physical quality...

Scientific information on the welfare of broilers reared in alternative systems is scarce. The objective of this study was to assess the welfare of free-range broilers using the Welfare Quality® protocol. Free-range broilers reared in ten farms were observed, and measures were made in broilers of five of these farms. The collected data were transfo...

Scientific information on the welfare of broilers reared in alternative systems is scarce. The objective of this study was to assess the welfare of free-range broilers using the Welfare Quality® protocol. Free-range broilers reared in ten farms were observed, and measures were made in broilers of five of these farms. The collected data were transfo...

The objective of this research was to evaluate the effects of environmental enrichment on the welfare of industrial broiler chickens. Four hundred male broilers, from one to 38 days, were equally distributed in 20 pens of 2m(2), being 10 pens controlled no-enriched boxes (CE) and 10 in environment enriched (EE) with perches, sand tray, cabbage, kal...

Soybeans have high protein and energy content; however, they also contain antinutritional factors that limit inclusion in feeds for nonruminant animals. Therefore, the aim of the present study was to evaluate the influence of feeding raw (RFFS), deactivated (DFFS), or overheated (OFFS) full-fat soybeans on the intestinal health, diet digestibility,...

The present study evaluated the effect of feed particle size, thermal processing different levels of fat inclusion and of moisture addition on the amount of gelatinized starch in a corn-soybean broiler diet. The different processing factors were combined in a 2 x 4 x 4 x 2 factorial arrangement in a three randomized block design consisting of three...

The present study evaluated the effect of feed particle size, thermal processing, several levels of fat inclusion and moisture addition on pellet quality and protein solubility in potassium hydroxide (KOH) in a corn, soybean meal and animal by products based broiler diets. The different processing factors were combined in a 2  4  4  2 factorial...

In recent years, the poultry industry has intensified the search for technologies that provide nutrients to the embryo, especially through in ovo feeding (IOF). Recently, many studies have been conducted to determine what kings of compounds, solutions or nutrients should be introduced into the egg to improve the chicken’s performance and health. Th...

In this study, we evaluated the effect of the grouping of 1-d-old chicks according to initial BW on the subsequent homogeneity and distribution of the weight of the broilers at harvest. Two treatments (placement methods) were tested: in one treatment (random), the chicks’ placement was at random and not grouped by initial weight; in the other treat...

Objetivou-se neste experimento avaliar o impacto da adição de um complexo enzimático nos valores de energia metabolizável e dos coeficientes de digestibilidade do extrato etéreo e nitrogênio da soja integral desativada com diferentes granulometrias em frangos de corte. Foram utilizados 100 frangos, machos, com peso médio de 620g. O delineamento foi...

The proposal of this study was to evaluate the effect of conjugated linoleic acid (CLA) supplementation on swine diets, reared from 65kg body weight up to slaughter (100kg body weight) on animal performance, cut yields and carcass traits. Two hundred crossbred pigs (JSR x PIC) were used, half barrows and half gilts. The treatments were diets with (...

RESUMO O conhecimento dos processos fisiológicos que atuam sobre os suínos aliado a formas racionais e eficientes de exploração do seu potencial genético pode levar a um aumento da produção destes animais. Entre estes processos podemos citar a temperatura corporal, esta é fundamental para o desenvolvimento do animal, principalmente logo após o nasc...

O objetivo foi avaliar o melhor nível de lisina a ser utilizado na ração de fêmeas suínas de primeiro parto em lactação, em relação ao desempenho dos leitões ao desmame, e também avaliar o número de fetos e peso dos leitões no segundo parto. Foram utilizadas inicialmente 50 porcas primíparas em lactação, distribuídas entre os 5 tratamentos (10 anim...

The objective of this experiment was to evaluate the effect of the addition of an enzymatic complex (protease, amylase and celulase) and in two different particle size (GMD – geometric mean diameter 0.650 mm and 1.250mm) on the deactivated full-fat soybean digestibility. One hundred male broilers were used, with average weight of 620g. The experime...

This work was carried out to evaluate the use of Bacillus subtilis probiotic C-3102 (1010cfu/g) in diets with or without growth promoters on the performance of broilers in the period from 1 to 42 days of age. It was used 1,200 Cobb line broilers, distributed in a complete randomized block with five diets: negative controller (without promoters); Ba...

Temperatures continuously higher and lower than the standard incubation temperature by 3°C from embryonic d 16 until embryonic d 18.5 result in differential effects on embryonic development, the hatching process, and embryonic metabolism. Embryos in the high-temperature group were forced into a state of malnutrition by the temperature treatment, as...

The present study aimed to determinate optimum lysine levels to be used in the ration of primiparous sows in lactation, in relation to piglets performance at weaning. Fifty primiparous sows in lactation were used, and distributed among five treatments (10 animals per treatments), and each treatments contained different levels of digestible lysine i...

An experiment was conducted to investigate the influence of feed form and corn particle size on the performance, uniformity, intestinal pH, and allometry of gastrointestinal organs of turkeys. A completely randomized experimental design in a 2 x 3 factorial arrangement-2 feed forms (crumbled and micropelleted) and 3 corn particle sizes (380, 606, a...

Resumo: Com o crescimento da produção de perus no Brasil e considerando a sua importância no mercado mundial, as informações disponíveis na literatura sobre exigências de aminoácidos são escassas, antigas e não é raro encontrar formulações com base em proteína bruta. Neste estudo avaliou-se o efeito da utilização de rações com diferentes níveis de...

Influência da granulometria do calcário da ração na qualidade da casca de ovos de matrizes avícolas de segundo ciclo Resumo: O objetivo deste trabalho foi avaliar o efeito de diferentes granulometrias do calcário em rações de matrizes, na fase pós-muda, sobre a qualidade da casca dos ovos. Foram utilizadas 640 reprodutoras, distribuídas em um delin...

Influência da granulometria do calcário da ração sobre as características de incubação de ovos de matrizes avícolas de segundo ciclo Resumo: O objetivo deste trabalho foi avaliar o efeito de diferentes granulometrias do calcário em rações de matrizes, de segundo ciclo, sobre variáveis de incubação. Foram utilizadas 640 reprodutoras, distribuídas em...

1 Parte da dissertação de mestrado do primeiro autor 2 Mestrandos do Programa de Pós-graduação em Ciências Veterinárias – UFPR/Curitiba. Resumo: A avicultura é responsável pelo consumo de mais de 50% de todas as rações produzidas no Brasil e, desse total, grande parte é fornecida na forma peletizada, o que permite melhorias no desempenho animal. A...

The processing of diets means change the structure of an ingredient in natural state to achieve the maximum potential nutrition, to improve the performance of animals. The more processing plants used in animal feed are the expansion, extrusion, and mainly the pelleting. The process of pellet is an agglomeration of particles ground of an ingredient...

The processing of diets means change the structure of an ingredient in natural state to achieve the maximum potential nutrition, to improve the performance of animals. The more processing plants used in animal feed are the expansion, extrusion, and mainly the pelleting. The process of pellet is an agglomeration of particles ground of an ingredient...

Existem vários fatores que podem afetar o desempenho e rendimento dos frangos de corte, independentemente dos níveis nutricionais utilizados nas dietas, como a idade da matriz e o peso do ovo. Neste trabalho, foram avaliados os possíveis efeitos que a idade da matriz e o peso do ovo à incubação exercem sobre o desempenho zootécnico e rendimento de...

O objetivo deste trabalho foi verificar se a ingestão diária de diferentes quantidades de lisina digestível, pelas fêmeas suínas primíparas em lactação, influencia o desempenho produtivo, reprodutivo e o perfil sangüíneo dessas matrizes. Utilizaram-se inicialmente 50 porcas primíparas em lactação, distribuídas em 5 tratamentos (10 animais por trata...

O objetivo do trabalho foi avaliar as alterações tegumentares (morfogênese da pena), em embriões de frangos de corte de linhagens de diferentes padrões de crescimento, obtidos de ovos incubados sob diferentes temperaturas. Os ovos foram obtidos de matrizes das linhagens Cobb 500 e ISA JA57, distribuídos proporcionalmente em três incubadoras. Do pri...

The study was designed to evaluate the productive consequences of fasting neonatal chicks obtained from strains genetically divergent for growing. Four hundred eight chicks from three strains, 160 from breeders selected for high growth rate and excellent feed conversion ratio (Cobb 500), 160 from breeders not selected for fast growth (JA57), and 16...

Effects of yolk sac removal (deutectomy) upon performance of chicks from three divergent strains were tested to evaluate the importance of endogenous nutrition on the post-hatch phase. Chicks from three different strains (Hy-Line W98, Cobb 500, and JA57) were submitted to a surgery procedure after hatching. Half of them had the residual yolk remove...

The addition of fitase enzyme (500FTU kg-1) was evaluated, in diets of different particle size (Average Geometric Diameter - AGD) for broiler chicken at the initial phase. Birds were distributed in a totally randomized experimental design, in factorial model 2 (AGD - 680 µm and 430µm) x 2 (enzyme - with or without Fitase). Diets with fitase inclusi...

Neste estudo foi avaliada a adição da enzima fitase (500FTU kg-1) em dietas de diferentes granulometrias (Diâmetro Geométrico Médio - DGM) para frangos de corte na fase inicial. As aves foram distribuídas em um delineamento experimental inteiramente ao acaso, em esquema fatorial 2 (DGM - 680µm e 430µm) x 2 (enzima - com ou sem Fitase). As dietas co...

The feed intake and performance of the broilers fed with different levels of dietary energy in the starter diet to 21 days of age were evaluated. In Experiment 1 it was evaluated the performance of birds fed to 2,900 and 3,200kcal ME kg-1 diets, and the results show that ME intake was highest for birds 3,200kcal ME kg-1 on the 7th day of age. Feed...

Avaliou-se a capacidade tamponante(CT) de diferentes ingredientes e dietas para leitões,por meio de diferentes medidas: pH inicial (pHi),acidez ou alcalinidade tituláveis (AT) e CT. Foramutilizadas 32 amostras de diferentes ingredientes,pré-misturas e dietas, classificadas como aminoácidos,suplementos minerais, cereais e subprodutos,soja e subprodu...

Este estudo foi realizado com o objetivo de avaliar o efeito da forma física da ração sobre o desempenho, a utilização dos nutrientes das rações e o desenvolvimento do trato disgestório de pintos de corte na primeira semana de vida. Foram utilizados 150 pintos machos Cobb distribuídos ao acaso em três tratamentos com cinco repetições de dez aves. O...

This experiment was conducted to evaluate the effect of different physical form of pre-starter diet on performance, nutrient utilization and development of gastrointestinal tract of broiler chicks during the first week of age. A total of 150-day-old male broiler chicks was allotted to a completely randomized design with three treatments and five re...

There are several factors that can affect the performance and efficiency of broiler, regardless of the levels used in nutritional diets, such as breeder age and egg weight. In this study, were evaluated the effects of breeder age and egg weight carry on the performance and carcass yield of broilers. The birds were allocated in a completely randomiz...

Foi avaliado um probiótico termo-resistente,liofilizado e encapsulado, composto de Bacilluscereus (ATCC 9634) 4,0 x l08 UFC/g e Bacillus subtilis(CCT 3131) 4,0 x l08 UFC/g, incorporado emuma ração comercial para cães com o objetivo deavaliar sua viabilidade durante o período de umano, e o seu efeito imunoestimulante quando fornecidoàs dietas. No pr...

In order to evaluate the effects of broiler genotype and of heat exposure on performance, carcass characteristics, and protein and fat accretion, six hundred one-day-old male broilers were randomly assigned in a 2 x 3 factorial arrangement, according to the following factors: genetic group (selected and non-selected broilers) and pair-feeding schem...

Buffering capacity (BC) of several feeds and diets for pigs was evaluated by different ways: initial pH (pHi), titratable acidity or alkalinity (AT) and BC. For the experiment were used 32 samples of different ingredients, mineral supplement mix and diets, classified as amino acids, mineral supplements, cereals and its raw products, soybean and its...

The time of viability of a thermostable probiótica (TR) in extruded and mealy formulations for dog food and their imunoestimulant effects indogs were evaluated. A commercial, lyophilized,thermostable and encapsulated probiotic,composed of Bacillus cereus (ATCC 9634) 4,0 xl08 UFC/g; Bacillus subtilis (ATCC 3131) 4,0 x l08UFC/g, was incorporated in a...

In order to evaluate the effect of energy intake and broiler genotype on performance, carcass yield, and fat deposition, 600 one-day-old male chicks from two different genetic groups (AgRoss 308 - commercial line and PCLC - Embrapa non-improved line) were fed diets with different metabolizable energy level (2950, 3200 and 3450 kcal/kg). A completel...

The objective of this experiment was to evaluate the effect of a probiotic (Bacillus subtilis, strain DSM 17299) in broiler diets on feed intake, weight gain, and feed conversion ratio. The experiment included 1,200 male Ross broilers from 1 to 42 days of age. Birds were randomly allocated to 4 treatments, with 10 replicates of 30 birds. The follo...

A produção industrial de frangos de corte desafia de maneira importante o bem-estar das aves. O objetivo deste foi melhorar o grau de bem-estar de frangos de corte, através do fornecimento de poleiros e da avaliação de seu impacto no bem-estar dos animais. Foram utilizados 360 frangos de corte, machos, criadosde 1 a 42 dias de idade, em dois tratam...

Industrial broiler production presents important challenges to the welfare of the birds. The objective of this work was to increase broiler welfare through the inclusion of perches and the evaluation of their impact on the welfare of the animals. Three hundred and sixty male birds were raised from day 1to 42 in two treatments, with six boxes per tr...

Este estudo foi conduzido para avaliar o efeito do jejum entre o nascimento e o alojamento sobre o consumo de ração, ganho de peso, conversão alimentar e viabilidade criatória até 42 dias de idade; perda de peso e consumo de ração no período que suceder ao nascimento, em frangos de corte provenientes de matrizes de diferentes idades. Foram utilizad...

In the latest years more attention has been given to mechanisms for bird adaptation at post-hatching period by management of environmental conditions and formulations of diets offered during this period when digestive, immune, and thermo-regulating systems suffer slight changes. In post-hatching period, digestive system is anatomically complete, bu...

Utilizaram-se 600 ovos embrionados, provenientes de matrizes de 32, 43 e 60 semanas de idade, da linhagem Cobb – 500, incubados a 37,8°C e 60% de umidade. Foram analisados peso do ovo, peso dos ovos aos 19 dias de incubação, tempo de incubação, perda de peso do ovo durante a incubação, peso dos pintainhos no momento do nascimento e na retirada do n...

O objetivo deste trabalho foi avaliar o desempenho de frangos, entre 42 e 49 dias, alimentados com dietas de baixa proteína e criados em diferentes temperaturas. Foram utilizados 360 frangos, machos, Cobb-500, distribuídos em um delineamento inteiramente ao acaso em esquema fatorial 3x3 (temperatura ambiente de 20, 25 e 32ºC e dietas com teores de...

The objective of this work was to evaluate broilers performance, from 42 to 49days, fed on low-protein diet and reared under different temperatures. Three hundred and sixty male broilers from Cobb-500 strain were randomly housed in a 3x3 factorial arrangement (environmental temperature of 20, 25 and 32ºC and crude protein levels of 18.0, 16.5 and 1...

The supplementation of vegetal diets with L-methionine (100% molar), methionine hydroxyl analogue (HMB) (88% molar) or DL-methionine (99% molar) was compared as to the performance of broilers allocated in cages and submitted to cyclic heat stress (CHS). The trial was carried out from 21 to 42 days of age. Two levels of synthetic methionine were sup...

Foi avaliado o empenamento de frangos de corte alimentados com dietas suplementadas com diferentes fontes e níveis de selênio (Se), criados sob diferentes condições de temperatura. Foram utilizados 720 pintainhos, Cobb-500, em um delineamento inteiramente ao acaso em esquema fatorial 3 x 2 x 2 (3 temperaturas ambiente: termoneutra, fria e quente; 2...

Foram avaliados os parâmetros zootécnicos de frangos de corte alimentados com dietas suplementadas com diferentes fontes e níveis de selênio (Se), criados sob diferentes condições de temperatura. Foram utilizados 720 pintainhos, Cobb-500, em um delineamento inteiramente ao acaso em esquema fatorial 3 x 2 x 2 (3 temperaturas ambiente: termoneutra, f...

Feather growth, plasmatic levels of T3 and T4 and body temperature were evaluated in broiler raised under different temperatures. The two evaluated broiler lines were Cobb-500 and ISA-Label JA57. One hundred and eighty birds of each line were raised under cold, neutral or hot temperatures in a complete randomized design with 3 x 2 factorial scheme...