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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Feeding behaviour of lions (phanthera leo ) on a small reserve

Lehmann, MB, Funston, PJ, Owen, CR, Slotow, R 12 November 2007 (has links)
The prey selection and predatory behaviour of a single pride of lions (Panthera leo) was studied in the 8500 ha Karongwe Game Reserve from 1999–2005. The study focused on the difference between prey selection in the first three years when a two-male coalition was present with a similar period thereafter when one of the males was removed and subadult males dispersed from the pride. A total of 662 kills were recorded, with blue wildebeest (Connochaetes taurinus), warthog (Phacochoerus africanus), waterbuck (Kobus ellipsiprymnus), zebra (Equus burchelli) and impala (Aepyceros melampus) being the most preferred species. Although there was preference for these species, and adult prey were favoured, there was no significant selection for prey size, age or gender. There was a significant difference in the number of kills made when the two-male coalition was present as opposed to the single pride male. The solitary pride male spent significantly more time with the females and shared most of their kills, and during this period dispersing subadult males killed a substantial amount of prey when separated from the pride. Knowledge on predator feeding behaviour is important for managers to assess impact on prey populations in small reserves in order to manage them correctly, thereby preventing depletion of such populations.
2

Própolis no desempenho produtivo de juvenis de pacú criados em tanque rede e arraçoados com baixa e alta frequência alimentar

Agostinho, Lucas Miyabara [UNESP] 13 July 2010 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:28:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-07-13Bitstream added on 2014-06-13T19:36:56Z : No. of bitstreams: 1 agostinho_lm_me_botfmvz.pdf: 249237 bytes, checksum: 93653668e8214e03647537b124f87ed0 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Universidade Estadual Paulista (UNESP) / O cultivo intensivo de peixes em tanque-rede pode induzir ao estresse fisiológico, promovendo queda de desempenho do animal e da imunocompetencia. A utilização de imunoestimulantes, como a própolis, pode melhorar a imunidade inata dos animais e fornecer resistência a patogenos durante períodos de estresse elevado. Os objetivos deste trabalho foram avaliar o efeito da própolis em juvenis de pacu, criados em tanques-rede e arraçoados com baixas e altas frequências alimentares, por meio do desempenho produtivo e das enzimas intestinais. Foram utilizados juvenis de pacu (Piaractus mesopotamicus), distribuídos em 18 tanques-rede com estocagem de 90 alevinos/m3 com peso médio inicial de 27,57±7,21 g. Foram utilizados três níveis de própolis incorporada na ração comercial, nos seguintes tratamentos: 0,0; 1,0 e 10,0 g de própolis/kg de ração, fornecidas em duas frequências alimentares: quatro e 24 vezes ao dia em um delineamento fatorial (3x2) e com taxa de alimentação de 7,0%. Os resultados foram analisados por ANOVA, seguida do teste de Tukey para comparação de médias. A suplementação de própolis na dieta melhorou o ganho de peso dos animais, na frequência alimentar de 24 vezes ao dia. Entretanto, quando a frequência alimentar foi menor os níveis de própolis não melhoraram o ganho de peso / Intensive fish farming in net cages can lead to physiological stress, thus impairing animal performance and resistance to diseases. The use of immunostimulants, such as propolis, can bring benefits mainly in the initial phases of the culture. This work aimed at evaluating the effect of propolis in juveniles of Pacu, reared in net cages and fed high and low feeding frequencies, by analyzing their performance and digestive enzmes. Pacus were distributed in 18 cages with 90 fish/m3 and 27.57±7.21 g. Three levels of propolis were added in fish diet (0.0; 1.0 and 10.0g/kg) supplied in two feeding frequencies (four and 24/day) in a factorial arrangement (3x2) and a feeding rate corresponding to 7% of fish weight. Results were analyzed by ANOVA and Tukey test comparison of averages.Fish diet with propolis with a feeding frequency of 24 times a day resulted in improved weight gain
3

Optimising cow traffic in automatic milking systems : with emphasis on feeding patterns, cow welfare and productivity /

Melin, Martin, January 2005 (has links) (PDF)
Diss. (sammanfattning). Uppsala : Sveriges lantbruksuniv. / Härtill 4 uppsatser.
4

Sodium and potassium regulation : with special reference to the athletic horse /

Jansson, Anna, January 1900 (has links) (PDF)
Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniv. / Härtill 5 uppsatser.
5

Technical and management tools in dairy production : improvements in automatic milking systems and detection of cows with deviating behaviour /

Oostra, Huibert H., January 2005 (has links) (PDF)
Diss. (sammanfattning) Alnarp : Sveriges lantbruksuniversitet, 2005. / Härtill 5 uppsatser.
6

Effects of restricted feeding schedule during development and gestation on gilt and sow performance

Schneider, Jason Dean January 1900 (has links)
Doctor of Philosophy / Department of Animal Sciences and Industry / Jim L. Nelssen / The overall objective of these experiments was to develop management and feeding programs to increase sow longevity and productivity by improving welfare conditions. In Exp. 1, 208 gestating sows and 288 gestating gilts were utilized to determine the effect of feeding frequency (2 vs. 6) on performance and welfare issues. Feeding frequency had no affect on growth and reproductive performance in gestating sows; however, increasing the feeding frequency did improve the welfare measurements in this trial. Gilts fed six times a day did have increase ADG during d 0 to 42; however, there was no affect on performance from d 42 to farrowing. In Exp. 2 (630 pigs in 4 studies), increasing the feeding frequency (2 vs. 6) of a restricted feeding level increased growth performance of finishing pigs. This affect is likely due to the increase of available energy above maintenance when compared with the gestating sows. In Exp. 3, different feed drops used for delivering feed were evaluated. The Accu and the Ultra feed drops were more accurate than the Econo feed drop at angles of 90, 75, and 60°. The difference in accuracy is potentially related to the way that the drops attach to the feed line. However, the amount of feed that is collected in each drop appears to increase linearly as the feeder settings are increased. Thus, regression equations for the angle of the feed drop can be developed to adjust for the variability in the amount of accumulated feed. In Exp. 4, Alimet® was used to determine the TID TSAA:Lys ratio for ADG and G:F of 63 and 66% for Genetiporc and 61 and 56% for PIC pigs weighing between 10 to 20 kg. In Exp. 5, the optimal TID Lys:Calorie ratio was estimated to be 3.7 and 4.1 g Lys/Mcal ME for the Genetiporc and PIC pigs weighing between 10 to 20 kg . The ratios were than validated at two energy levels and the amount of TID Lys that was used for lean gain was similar for both genetic lines at approximately 20 g of Lys for each kg of gain.
7

Própolis no desempenho produtivo de juvenis de pacú criados em tanque rede e arraçoados com baixa e alta frequência alimentar /

Agostinho, Lucas Miyabara, 1984- January 2010 (has links)
Orientador: Ricardo de Oliveira Orsi / Banca: Margarida Maria Barros / Banca: Lidia Maria Ruv C Barreto / Resumo: O cultivo intensivo de peixes em tanque-rede pode induzir ao estresse fisiológico, promovendo queda de desempenho do animal e da imunocompetencia. A utilização de imunoestimulantes, como a própolis, pode melhorar a imunidade inata dos animais e fornecer resistência a patogenos durante períodos de estresse elevado. Os objetivos deste trabalho foram avaliar o efeito da própolis em juvenis de pacu, criados em tanques-rede e arraçoados com baixas e altas frequências alimentares, por meio do desempenho produtivo e das enzimas intestinais. Foram utilizados juvenis de pacu (Piaractus mesopotamicus), distribuídos em 18 tanques-rede com estocagem de 90 alevinos/m3 com peso médio inicial de 27,57±7,21 g. Foram utilizados três níveis de própolis incorporada na ração comercial, nos seguintes tratamentos: 0,0; 1,0 e 10,0 g de própolis/kg de ração, fornecidas em duas frequências alimentares: quatro e 24 vezes ao dia em um delineamento fatorial (3x2) e com taxa de alimentação de 7,0%. Os resultados foram analisados por ANOVA, seguida do teste de Tukey para comparação de médias. A suplementação de própolis na dieta melhorou o ganho de peso dos animais, na frequência alimentar de 24 vezes ao dia. Entretanto, quando a frequência alimentar foi menor os níveis de própolis não melhoraram o ganho de peso / Abstract: Intensive fish farming in net cages can lead to physiological stress, thus impairing animal performance and resistance to diseases. The use of immunostimulants, such as propolis, can bring benefits mainly in the initial phases of the culture. This work aimed at evaluating the effect of propolis in juveniles of Pacu, reared in net cages and fed high and low feeding frequencies, by analyzing their performance and digestive enzmes. Pacus were distributed in 18 cages with 90 fish/m3 and 27.57±7.21 g. Three levels of propolis were added in fish diet (0.0; 1.0 and 10.0g/kg) supplied in two feeding frequencies (four and 24/day) in a factorial arrangement (3x2) and a feeding rate corresponding to 7% of fish weight. Results were analyzed by ANOVA and Tukey test comparison of averages.Fish diet with propolis with a feeding frequency of 24 times a day resulted in improved weight gain / Mestre
8

FREQÜÊNCIA DE SUPLEMENTAÇÃO E FONTE DE NITROGÊNIO SUPLEMENTAR E SUA RELAÇÃO COM O VALOR ALIMENTAR DE DIETAS BASEADAS EM FENO DE QUICUIO (Pennisetum clandestinum) FORNECIDAS PARA OVINOS / FEEDING FREQUENCY AND DEGRADABLE NITROGEN SOURCE IN RELATION TO FEEDING VALUE AND UTILIZATION OF KIKUIO GRASS (Pennisetum Clandestinum) HAY BASED DIETS

Cadorin Junior, Rui Luiz 15 February 2008 (has links)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / An in vivo digestibility experiment was conducted to evaluate the influence of degradable nitrogen source and feeding frequency on the digestion process and utilization of kikuio grass hay. Eight castrated male lamb (35 ± 4 Kg live weight) maintained in individual metabolic cage, were used in a 2x2 factorial experiment according to a replicated 4x4 Latin Square design. Treatments tested were the combination of two supplement feeding frequencies: once (morning) or twice (morning and aftermoon) daily, and two supplements, based on cassava meal plus calcium caseinate or cassava meal plus urea. For all treatments kikuio hay was fed ad. Libitum and the supplements were fed at a rate of 7 g/Kg live weight daily. Animals supplemented twice day consumed higher quantity of the gross fractions, either in absolute values or in proportion to live weight or metabolic weight (P<0,05) and they tended to consume higher quantity of digestible energy and to synthesize more microbial protein (P<0,10). Feeding frequency did not influence the digestibility. When calcium caseinate was fed animal tended (P<0,10) to have higher dry matter intake in relation to live weight and higher organic matter intake in relation to metabolic weight. There was interaction between nitrogen source × frequency of supplementation on intake of both digestible organic matter and digestible energy. Animals receiving supplement with calcium caseinate twice a day and supplemented with urea once a day have higher intake of theses fractions. Animals supplemented once a day presented higher rumen sugar concentration (P<0,05), but pH as well as ammonia and peptides + aminoacid concentration were not affected by supplementation frequencys. Higher concentrations of NH3 and lower concentrations of pep+aa were observed in animals supplemented with urea (P<0,05). The supplement feeding frequency did not influence the digestion process and forage utilization when the nitrogen source was urea, but when the nitrogen source was calcium caseinate, supplementation twice daily improves intake and nutrients offer to the animals. / Para avaliar se as freqüências de oferta de suplemento, com diferentes tipos de nitrogênio degradável, influenciam os processos de digestão e a utilização do feno de uma gramínea tropical, foi realizado um estudo de digestibilidade in vivo, utilizando oito ovinos machos castrados (PV médio 35 ± 4 Kg), mantidos em gaiolas de metabolismo individuais em um delineamento duplo quadrado latino 4x4 em um esquema fatorial 2x2. Como volumoso foi utilizado feno de capim quicuio (Pennisetum clandestinum) com 70 dias de rebrota, como suplemento foi utilizada uma mistura a base de farinha de mandioca mais uréia ou caseinato de cálcio, além de uma mistura de sal mineral comercial e melaço em pó. Os tratamentos foram duas freqüências de suplementação × duas fontes de nitrogênio. As combinações foram suplementação com farinha de mandioca mais caseinato fornecido uma vez ao dia (manhã) e duas vezes ao dia (manhã e tarde) e suplementação com farinha de mandioca mais uréia uma vez ao dia (manhã) e duas vezes ao dia (manhã e tarde) à nível de 7 g/Kg de PV. O volumoso foi fornecido Ad. Libitum duas vezes ao dia (manhã e tarde). Os animais quando suplementados duas vezes ao dia consumiram maior quantidade das frações brutas, tanto em valores absolutos, como em proporção ao PV ou peso metabólico (P<0,05) e tenderam a consumir maior quantidade de energia digestível e a sintetizar mais proteína microbiana (P<0,10). A freqüência de suplementação não influenciou na digestibilidade e a eficiência da síntese de proteína microbiana. Somente houve uma tendência de quando os animais foram suplementados com caseinato consumirem maior quantidade de matéria seca em relação ao peso vivo e matéria orgânica em g/Kg de peso metabólico (P<0,10), não havendo mais nenhum efeito da suplementação com diferentes fontes de nitrogênio degradável no rúmen. Houve interação fonte de nitrogênio × freqüência de suplementação no consumo de matéria orgânica digestível e energia digestível onde os animais quando recebendo suplemento com caseinato duas vezes ao dia e quando suplementados com uréia uma vez ao dia consumiram mais destas frações. Quando os animais foram suplementados uma vez por dia apresentaram maiores concentrações ruminais de açucares (CHO) (P<0,05), e o pH, amônia (NH3) e peptídeos + aminoácidos (pep+aa) não foram influenciados pelas diferentes freqüências de suplementação. Maiores concentrações ruminais de NH3 e menores de pep+aa foram observadas quando os animais foram suplementados com uréia (P<0,05). A suplementação com farinha de mandioca mais caseinato fornecido duas vezes ao dia manifestou ser superior as demais suplementações, no entanto os mecanismos não ficaram bem estabelecidos, necessitando estudos adicionais.
9

Vliv četnosti krmení na růst telat v období mléčné výživy / Effect of feeding frequency on the growth of calves in the dairy nutrition

TOMANOVÁ, Jana January 2014 (has links)
Ensuring proper nutrition to young cattle is essential for its growth and development during rearing and the subsequent performance, including maintenance of the health of animals. Attention is deservedly paid mainly to colostrum nutrition, but also milk nutrition. However there are great reserves due to caregivers work habits and ingrained practices are the highest risk factors that decide the success of rearing. The aim of this thesis was to evaluate the effect of feeding frequency on the growth intensity of calves during the milk diet. The observation of calves was carried out from May 2013 to February 2014. Total of 60 randomly selected calves - heifers of the Czech Fleckvieh cattle were analysed. Heifers were divided into two groups (2x30): one group was fed 2 times per day and the second group was fed 3 times per day by the same amount of milk.
10

Vliv hmotnosti ryb, teploty vody, krmení a hustoty obsádky na spotřebu kyslíku a produkci metabolitů v intenzivním chovu tilápie nilské (Oreochromis niloticus) / Effect of temperature, fish size and feeding on oxygen consumption and ammonia excretion in the Nile tilapia (Oreochromis niloticus)

DENKOVÁ, Adéla January 2012 (has links)
Aim of this work were to assessed the impact of feeding, temperature, stocking density, fish size and water temperature on ammonia excretion and oxygen consumption of Nile tilapia (Oreochromis niloticus) in recirculating system. Concentration (saturation) of oxygen, water temperature and pH were measured using multimeter and concentration of ammonia was assessed by direct Nessler method. For assessing of effect of fish size, three groups of tilapias weighed 25, 65 and 140 g were established, each group in four replicates. For assessing of effect of feeding was tilapias (body weight 65g) divided into groups fed continuously, two meals per day and four meals per day, each group in four replicates. For assessing of effect of stocking density was tilapias (body weight 65g) divided into groups of 20, 50 and 80 kg.m-3, each group in four replicates. All experiments were performed for water temperature of 23, 27 and 31 °C and for fed and starved fish. Mean daily oxygen consumption was higher for smaller fish categories than for bigger ones and grow rapidly after feeding. The kind of feeding had impact on diurnal fluctuation of oxygen consumption. It was also confirmed that tilapia can survive low level of oxygen concentration for a quite long period.

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