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Biblioteca Digital do IPB (53.442 recursos)

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CA - Resumos em Proceedings Não Indexados ao ISI

Mostrando recursos 1 - 20 de 120

  1. Effect of the temperature in the honey quality

    Pascoal, Ananias; Lopes, Sara; Estevinho, Leticia M.; Carvalho, Marieta
    Honey is the natural sweet substance produced by Apis mellifera bees from the nectar of plants, secretions of living parts of plants, or excretions of plant-sucking insects on the living parts of plants, which the bees collect, transform by combining with specific substances of their own, deposit, dehydrate, store and leave in the honeycomb to ripen and mature (Decreto-Lei nº214/2003). This product can suffer alterations if the conditions of conservation and storage are not appropriate. The objective of this work was to evaluate the effect of the temperature in the physical-chemical and microbiological parameters of monofloral honeys stored for 4...

  2. Evaluation of the sensory quality of monofloral honey

    Estevinho, Leticia M.; Lopes, Sara; Pascoal, Ananias; Carvalho, Marieta
    Honey is an alimentary product much appreciated due to his aroma, flavor and nutritional characteristics. The sensorial analysis is important in the evaluation of the quality and authenticity of monofloral honeys. It considers attributes as color, aroma, consistence and flavor, which are interlinked and depend on the volatile compounds related with the fragrance of the flowers where the nectar was collected. The aroma and the flavor are also related directly with honeys’ color. The objective of this work was to evaluate the pollinic profile and the sensorial characteristics of four honeys from biological mode of production. The pollen analysis indicated that all of the...

  3. Main reasons for honey bee colony mortality in Portugal. A snapshot of beekeepers' beliefs

    Pires, Sância; Murilhas, António; Russo, Paulo; Valério, Maria; Gonçalves, Manuel
    To investigate claims of abnormally high honey bee colony mortality in Portugal during 2011, a survey was carried out via telephone interviews. It included 662 (≈ 4%) registered Portuguese beekeepers and followed the basic 'Coloss' questionnaire. Interviewees were selected accounting for total numbers of colonies and the geographical distribution of their apiaries across the country. The 'sampling grid' was set to 5 beekeepers per county, fully covering continental Portugal and jointly considering the autumn and winter periods. The overall annual colony mortality that beekeepers historically regard as 'natural' for their own apiaries is 9.7 ± 0.2 (mean ± standard error...

  4. Nosema distribution across Portugal. Results from the first nationwide survey (2011-12)

    Pires, Sância; Murilhas, António; Russo, Paulo; Valério, Maria; Gonçalves, Manuel
    A nationwide field sampling exercise was launched in 2011, to address mounting anecdotal evidence of atypically high honey bee colony mortalities of unexplained origin occurring throughout Portugal. The first approach was to contact 662 beekeepers (≈ 4% of the registered Portuguese beekeepers), via telephone interviews with a view to formulating an 'educated guess' regarding the cases where Nosema apis / Nosema ceranae seemed more likely to have had a role in colony mortality/morbidity. Interviewees were selected accounting for their total numbers of colonies and the geographical distribution of their apiaries across the country. The 'interviewee grid' was set to 5...

  5. Os suínos de raça Bísara: caracterização biométrica

    Carvalho, Marieta; Gomes, Graciete
    Este trabalho teve como objectivo contribuir para a caracterização biométrica dos suínos de raça Bísara, nascidos, criados e abatidos nas explorações dos criadores/agricultores, submetidos a condições de produção tradicionais e tendo como finalidade o autoconsumo. Neste sentido, no concelho de Vinhais, em 15 explorações, no mês de Janeiro de 1999 medimos 15 animais adultos: 7 machos castrados e 8 fêmeas. Os machos tinham uma idade compreendida entre os 15 e os 20 meses, com uma média de 18,57±1,90 meses. As fêmeas tinham uma idade compreendida entre os 15 e 23 meses, com uma média de 18,88±2,48 meses. Verificamos que existe uma grande...

  6. Efeito do tipo de músculo na qualidade organoléptica da carne de suínos da raça Bísara

    Carvalho, Marieta; Azevedo, Jorge
    As características organolépticas interessam, quer à indústria cárnea, quer ao consumidor, assumindo particular importância no que respeita à carne de raça suína Bísara, devido às elevadas expectativas do consumidor face a um produto, à partida, de alta qualidade, que beneficia da designação DOP (CARVALHO, 2009). Este trabalho tem como objetivo apresentar os resultados obtidos na perceção global e consensual entre os provadores acerca das características: aroma, tenrura, textura, suculência, sabor e apreciação global em três músculos, semímembranosus {SM), bíceps femorís {BF) e longíssímus thoracis et lumborum (LTL) em suínos da raça Bísara. Utilizaram-se 45 porcos (28 fêmeas e 17 machos), pertencentes à Unidade Experimental da UTAD, alimentados com...

  7. O coelho bravo e zoonoses emergentes – Tularémia

    Carvalho, Marieta
    O Coelho-bravo europeu (Oryctolagus cuniculus algirus) desempenha um papel preponderante nos nossos ecossistemas. Para além de “animar” a paisagem rural, gera muita riqueza às populações que vivem do negócio da caça, é um alimento para um número elevado de fauna selvagem como: o lince-ibérico (Lynx pardinus), a águia-imperial (Aquila adalberti), o lobo ibérico (Canis lupus), o javali (Sus scrofa), a raposa e outras espécies importantes para o equilíbrio da natureza. Em Portugal e país vizinho, as populações de coelho-bravo têm sofrido um declínio muito acentuado devido: ao êxodo rural, abandono das terras agrícolas, caça pelo Homem excessiva e o aparecimento de...

  8. Impact of measurement errors on alternative predictors of lean meat proportion of lamb carcasses

    Cadavez, Vasco
    The objectives of this study were to evaluate the impact of measurement errors on alternative predictors of lean meat proportion (LMP) of lamb carcasses. Ninety eight lambs (72 males and 26 females) of Churra Galega Bragançana breed were slaughtered, and carcasses were weighed (HCW) approximately 30 min after exsanguination. During carcasses quartering a caliper was used to perform tissue depth measurements, over the maximum depth of longissimus muscle (LM), between the 12th and 13th ribs (C12 ), and between the 3rd and 4th lumbar vertebrae (C3). The C12 and C3 measurements were contaminated with simulated measurement errors, and three distributions for random error were simulated: 1} random error with mean...

  9. Predicting the carcass composition of lambs by a simultaneous equations model

    Cadavez, Vasco
    The objective of this study was to develop models to predict lamb carcass composition by simultaneous equations model (SEM), and to compare t he efficiency of the ordinary least squares (OLS), weight least squares (WLS), and seemingly unrelated regressions (SUR) estimators. Forty male lambs, 22 of Churro Galego Bragançano Portuguese local breed and 18 of Suffolk breed were used. Lambs were slaughtered and carcasses were weighed approximately 30 min after slaughter in order to obtain hot carcass weight (HCW). After cooling at 4°C for 24-h, the subcutaneous fat thickness measurement (C3) was taken between the 12th and 13th ribs. The left side of al l carcasses was dissected into muscle,...

  10. Parâmetros de qualidade da carcaça e da carne de pequenos ruminantes

    Cadavez, Vasco

  11. Study of genetic diversity of dog cão de gado transmontano breed by pedigree analysis

    Rosa, José Luís Nunes; Malovrh, Špela; Kovac, Milena; Cadavez, Vasco
    The objective of this work was to study the genetic diversity of the Portuguese local dog breed Cao de Gado Transmontano by pedigree analysis. Pedigree data of dog breed Cao de Gado Transmontano was taken from the database of the Associação Criadores de Cao de Gado Transmontano concerning the period from 2003 to 2009. The pedigree file completeness was evaluated. The number and the proportion of animals with both parents known, sire known, and dam known were computed using the SQL procedure. Population genetic diversity parameters were computed using the PEDIG software package. The number of founders was 131 animals; however the effective number of founders...

  12. The use of ultrasounds to predict lean meat proportion of lambs carcasses

    Cadavez, Vasco
    The objective or this work was to study the use of ultrasounds to predict lean meat proportion of lamb carcasses. One hundred and twenty lambs (SO males and 40 females) of Churra Bragançana Portuguese local breed with a mean live weight of 23.0±6.9 kg were used. Lambs were scanned using an ALOI(A SSD-500V ultrasound machine. equipped with one probe of 7.5 MHz, at lumbar and sterna I regions. The images were analysed in order to measure the longissimus muscle depth (LD), subcutaneous fat thickness (SF). between the 121h and J31h vertebrae, and breast bone tissue thickness at 3"1 (BT3) sternebrae. Lambs were slaughtered after 24 h...

  13. Estimation of genetic parameters for calving ease for Simmental cattle in Croatia

    Bulic, Vesna; Ivkic, Zdenko; Spehar, Marija; Cadavez, Vasco
    The objective of this study was to estimate the genetic parameters for calving ease of Simmental eau le in Croatia. Data consisted of 135,S92 calves. and pedigree included 639.999 animals. Calving ease was scored from I to 5 (I = unassisted, 2 to 5 =various levels or assistance). Calving ease at first calving. and second or later parities where treated as different traits. Variance components were estimated by REML as implemented in VCE-5 package. Statistical model included age at calving. sex, region-year interaction as fixed effects and owner and direct additive genetic effect as random effects. The estimated heritabilities were 0.1 05±0.005 for calving ease at...

  14. Prediction of lean meat proportion of lambs carcasses

    Cadavez, Vasco
    The objectives of this study were to identify a reduced pertinent set of variables from an original data set of 18 carcass measurements in order to avoid redundancy and collinearity problems or to simplify data analysis and the development of the linear regression models to predict lean meat yield of lamb carcasses. Forty-six (46) male lambs, 26 of Churro Galego Bragançano Portuguese local breed and 20 of Sufolk c breed were used. Lambs were slaughtered and carcasses weighed approximately 30 min after in order to obtain hot carcass weight (HCW). After cooling at 4 o C for 24-h a set of seventeen carcass and tissues measurements were...

  15. Interrelationships among predictors of lamb carcass composition

    Cadavez, Vasco
    The objective of th is study was to identify a reduced set of variables from an original data set of 18 carcass measurements in order to avoid redundancy, collinearity problems, and to simplify the development of models to predict lambs carcass composition. One hundred and twenty-six lambs, 86 mules and 40 females, of Churra Galega Bragançana Portuguese local breed were slaughtered, and carcasses were weighed (HCW) approximately 30 min after exsanguination. After cooling at 4°C tor 24 ha set of seventeen carcass measurements were recorded, and data interrelationships were analysed following the common factor analysis procedure. All variables were highly and positively correlated with HCW (r >...

  16. Pecuária e sociedade: ameaças e oportunidades para as raças autóctones portuguesas.

    Sousa, Fernando Ruivo de
    As raças autóctones portuguesas tiveram um papel de grande relevo na sociedade portuguesa no período pré-industrial. O país possui um número significativo de raças autóctones: 14 raças de bovinos, 15 de ovinos, 6 de caprinos, 3 de suínos, 4 de equídeos e 3 de galináceos. A mecanização e a industrialização da agricultura, associada à necessidade de aumentar de forma muito significativa a produção de bens alimentares a um baixo custo, conduziu a generalidade das populações de raças autóctones a efectivos que os colocavam em perigo de extinção. No ano de 1994, a introdução das medidas Agro ambientais na PAC, associada ao...

  17. Serological survey of Map infection in goats in the Northeast of Portugal

    Quintas, Hélder; Coelho, Cláudia A.; Valentim, Ramiro; Vila, Ana Grau; Prendes, Sergio Marques; Maurício, Raimundo; Mendonça, Álvaro
    The aim of this work was to study the seroprevalence of paratuberculosis in the Northeast of Portugal in order to discern its economic impact, and to prioritize the allocation of disease control resources. The goat flocks studied were located in the region of Trás-os-Montes e Alto Douro, Northeast of Portugal and included 3 counties (Macedo de Cavaleiros, Mirandela and Alfandega da Fé). In each flock, veterinary practitioners collected blood samples from at least 2 years old goats between May and July 2011. A goat flock was defined to be paratuberculosis seropositive if at least one seropositive adult goat was present....

  18. Efficiency of somatic cell count and california mastitis test in the diagnosis of subclinical mastitis in terrincha ewes

    Mendonça, Álvaro; Machado, M.; Tavares, A.; Quintas, Hélder; Valentim, Ramiro; Maurício, Raimundo; Cardoso, Manuel
    This study aimed to compare the efficiency of microbiological test with Californian Mastitis Test and somatic cell count in the diagnosis of Subclinical Mastitis (SM) in Terrincha sheep. Twenty-seven of a flock of about 200 Terrincha ewes (local breed) were studied for a period of 9 weeks (n > 497 samples). Milk samples were aseptically collected from each half udder once a week. At the same time, another sampled was collected from the bulk tank. After being transported to Lab under refrigeration all samples were immediately processed. The tests performed were the total microbial count (PCA), the Californian Mastitis Test...

  19. Advance of the breeding season and artificial insemination with frozen semen in Portuguese Serrana goats

    Valentim, Ramiro; Cortez, Maria de Fátima Cardoso Azevedo; Azevedo, Jorge; Pereira, Francisco José Sá; Mendonça, Álvaro; Quintas, Hélder; Maurício, Raimundo; Simões, João; Barbosa, Larissa; Correia, Teresa Montenegro
    This study aimed to compare the efficiency of melatonin and/or a short-term FGA treatment in the advance of the breeding season in Serrana goats. Fertility after artificial insemination (AI) with frozen semen was also assessed. Material and Methods This experiment took place at Bragança (latitude 41° 49' N, longitude 6° 40' W and altitude 720 meters) and involved 65 adult Serrana goats. At early March, 32 goats received a melatonin implant (18 mg) – melatonin group. The other 33 remained as control group. Fifty days later all goats were injected with 100 micrograms of PGF2alfa. Simultaneously a vaginal sponge with 20 mg...

  20. Hormonal control of the breeding activity in Churra Galega Bragançana ewes

    Correia, Teresa Montenegro; Azevedo, Jorge; Mendonça, Álvaro; Maurício, Raimundo; Cardoso, Manuel; Velasco, Helena; Quintas, Hélder; Fontes, Paulo; Simões, João; Barbosa, Larissa; Valentim, Ramiro
    This study aimed to evaluate the efficiency of different hormonal treatments to control the breeding activity in Churra Galega Bragançana (CGB) ewes. Material and Methods This experiment took place at Bragança (latitude 41° 49' N, longitude 6° 40' W, altitude 720 meters) and involved 94 adult CGB ewes. At March 9, 25 ewes received a melatonin implant (18 mg) – Melatonin. Forty-five days later a vaginal sponge with 20 mg of FGA was inserted in all ewes. FGA treatment lasted for 12 days. Twenty-four hours before sponge removal 32 non-melatonin treated ewes were injected with 500 UI of eCG (D-1). At sponge...

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