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| Registros recuperados: 233 | |
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| Tedeschi,Luís Orlindo; Fox,Danny Gene; Sainz,Roberto Daniel; Barioni,Luís Gustavo; Medeiros,Sérgio Raposo de; Boin,Celso. |
| Mathematical models can be used to improve performance, reduce cost of production, and reduce nutrient excretion by accounting for more of the variation in predicting requirements and feed utilization in each unique production situation. Mathematical models can be classified into five or more categories based on their nature and behavior. Determining the appropriate level of aggregation of equations is a major problem in formulating models. The most critical step is to describe the purpose of the model and then to determine the appropriate mix of empirical and mechanistic representations of physiological functions, given development and evaluation dataset availability, inputs typically available and the benefits versus the risks of use associated with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Feeding; Nutrient; Requirement; Supply. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000100015 |
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| Pedreira,Márcio dos Santos; Primavesi,Odo; Lima,Magda Aparecida; Frighetto,Rosa; Oliveira,Simone Gisele de; Berchielli,Telma Teresinha. |
| Ruminal gases, particularly methane, generated during the fermentative process in rumen, represent a partial loss of feed energy and are also pointed to as an important factors in greenhouse effect. This study aimed at quantifying methane (CH4) emission rates from lactating and dry cows and heifers, 24 month-old in average, on pasture under Southeast Brazil tropical conditions, using the tracer gas technique, sulphur hexafluoride (SF6), four animals per category, distributed in four blocks. Measurements were performed in February and June, 2002, with Holstein and Brazilian Dairy Crossbred (Holstein ¾ x Gir (Zebu) ¼), maintained on fertilized Tanzania-grass (Panicum maximum Jacq. cv. Tanzania) and fertilized Brachiaria-grass (Brachiaria decumbens cv.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding; Genetical group; Sulphur hexafluoride; Tropical pastures. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000600004 |
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| Monteiro-Filho,Emygdio L. A.. |
| Along ten years of study of a common dolphin from the brazilian coast, Sotalia brasiliensis Van Beneden, 1874, I could see some occasions of feeding associations of this dolphin with five species of birds, Sula leucogaster (Boddaert, 1783), Fregata magnificens Mathews, 1914, Sterna hirundinacea Lesson, 1831, Larus dominicanus Lichtenstein, 1823 and Phalacrocorax olivaceus Humboldt, 1895. The commonest association observed was between the dolphin and S. leucogaster, and in all the associations was characterized the commensalism, with advantaged to the birds. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sotalia; Cetacea; Sea birds; Feeding; Behaviour. |
| Ano: 1992 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751992000100005 |
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| Hahn,Norma Segatti; Almeida,Vera Lúcia Lescano de; Luz,Karla Danielle Gaspar da. |
| Hoplosternum Uttorale (Hancock, 1828) is an abundant species in the lagoons of the upper Paraná river floodplain. This species was sampled in Patos and Guaraná lagoons in the flood period (November/92-May/93) and low water period (June-October/93). To analyse food contents in the diet were analysed stomach of 91 adults. Twenty seven food items were recorded, among them, Testaceae, Nematoda, microcrustaceans, quironomids and organic detritus were predominant. These items allows to characterize the species as bentivore. To study feeding activity were analized 565 adults stomach contents. Food intake was more intense during flooding. Considering diel variation, the species started to eat during dusk, increasing during night, stopping to eat during daytime. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Siluriformes; Callichthyidae; Hoplosternum Uttorale; Feeding; Diel cycle; Lagoons. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100005 |
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| Aranha,José Marcelo Rocha; Caramaschi,Érica Pellegrini. |
| The population structure, reproductive aspects and feeding of Phalloceros caudimaculatus (Hensel, 1868), Poecilia vivipara Bloch & Schneider (1801), Phalloptychus januarius (Hensel, 1868) e Jenynsia lineata (Jenyns, 1842) were studied in five sampling stations in the Ubatiba stream, municipality of Maricá (State of Rio de Janeiro, Brazil). In relation to the population structure, P. caudimaculatus was more representative upstream; P. vivipara mid-stream and downstream; P. januarius and J. lineata downstream. The species presented preponderance of females, except in the intermediate length classes. The occurence of imatures and females with young pointed out a long reproductive period and favoured areas for reproduction of the four species. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cyprinodontiformes; Population structure; Feeding; Reproduction; Coastal stream. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000300005 |
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| Varoli,Franci Mary Fantinato. |
| This work deals with feeding tests performed in laboratory with Pantopoda species, Tanystylum isabellae Marcus, 1940 and Anoplodactylus stictus Marcus, 1940. Animals (alive and dead) and vegetable foods were offered to males without eggs, males with eggs, females and juveniles Pantopoda. Of the 13 types of food offered to the animals only Sertularia Linnaeus, 1758 (Hydrozoa). Amathia distans Busk, 1886 (Bryozoa), Hyale media (Dana, 1853) (Crustacea, Gammaridea), Caprella danilevskii Czerniavski, 1868 (Crustacea-Caprellidae), Artemia salina Leach, 1812 (Crustacea, Anostraca) e Perna perna (Linné, 1758) (Bivalvia, Mytilidae) were actually eaten. The macroalgae Sargassum C. Agardh, 1820; Padina Adanson, 1763; Chaetomorpha Kützing, 1845 and Ulva Linnaeus.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pantopoda; Sargassum fauna; Feeding. |
| Ano: 1994 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751994000400005 |
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| Branco,Joaquim Olinto. |
| From July 1996 to June 1997, in Armação do Itapocoroy, Penha, Santa Catarina State, Brazil, monthly census were done in three areas of traditional fishery and Itacolomis islands. A total of 10021 seabirds were registered, belonging to eight species, five genus and four families. The average number of seabirds per dragging varied between 80,2 and 113,6. Sterna spp, appeared at first in 43,3% of the released by-catch, followed by Larus dominicanus Lichtenstein, 1823, Fregata magnificens Matheus, 1914, Phalacrocorax brasilianus (Humboldt, 1805) and Sula leucogaster Boddaert, 1783. The average size of the fish consumed by the seabirds oscillated from 8,3 cm (Sterna spp.) to 18,5 cm (F. magnificens), with an average time from 6,12 to 7,55 minutes per by-catch... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seabirds; By-catch; Feeding. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000100033 |
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| Albertoni,Edélti Faria; Palma-Silva,Cleber; Esteves,Francisco de Assis. |
| Three species of shrimp, Farfantepenaeus brasiliensis (Latreille, 1817), F. paulensis (Pérez-Farfante, 1967) (Penaeidae) and Macrobrachium acanthurus (Wiegmann, 1836) (Palaemonidae) were sampled at the Imboassica lagoon (Rio de Janeiro State, Brazil), in order to estimate the overlap of dietary niches and electivity of their prey, through the analysis of the fauna associated with the macroalgae Chara and of the benthic fauna on the sediment. The overlap of dietary niches was estimated using five indexes. A total of 495 F. brasiliensis, 131 F. paulensis and 102 M. acanthurus stomachs were examined. The results of the different indexes of niche overlap exhibited the same general trend in the three species, indicating a high degree of homogeneity in the diet... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding; Farfantepenaeus brasiliensis; Farfantepenaeus paulensis; Macrobrachium acanthurus; Stomach contents. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000100017 |
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| Aranha,José Marcelo R.; Caramaschi,Érica P.; Caramaschi,Ulisses. |
| Patterns of spatial occupation, feeding, and reproductive period of two species, Corydoras aeneus and Corydoras gr. carlae (Siluroidei, Callichthyidae), coexistents in the Alambari River (Botucatu, São Paulo), were studied. High diet overlap, partial spatial segregation, and well differentiated reproductive strategies were verified. These findings do not permit to evidence the occurrence of competitive interactions between the analysed species. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Siluroidei; Callichthyidae; Spatial occupation; Feeding; Reproductive period. |
| Ano: 1993 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751993000300013 |
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| LEITE,Rosseval Galdino; ARAUJO-LIMA,Carlos A.R.M.. |
| Information on larval fish feeding is essential for understanding their trophic relations, including the management in conditions totally or partially controlled by humans. An experiment was designed to evaluate the larval diets of three commercially important species. Four varzea-lakes and the adjacent river were sampled with bongo and hand nets from January 1993 to November 1995. Larval diets were evaluated by length-classes and capture sites, and were tested by two factor ANOVA. The larvae were feeding in all habitats, except in the flooded forests. The three species had different diets, which varied with their length and lake. The rotifers were the main initial food item of the three species, replaced by fish larvae in Brycon cephalus, cladocerans in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Brazil; Feeding; Fish larvae; Food size. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672002000300499 |
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| SILVA,Nathália Carina dos Santos; COSTA,Aluízio José Lopes da; LOUVISE,José; SOARES,Bruno Eleres; REIS,Vanessa Cristine e Souza; ALBRECHT,Míriam Pilz; CARAMASCHI,Érica Pellegrini. |
| ABSTRACTResource partitioning is important for species coexistence. Species with similar ecomorphology are potential competitors, especially when phylogenetically close, due to niche conservatism. The aim of this study was to investigate the resource partitioning among populations of two species of lebiasinids (Copella nigrofasciata and Pyrrhulina aff. brevis) that co-occur in a first-order Amazonian stream, analyzing the trophic ecology, feeding strategies and ecomorphological attributes related to the use of food and space by these species. Fish were captured in May and September 2010. The stomach contents of 60 individuals were analyzed and quantified volumetrically to characterize the feeding ecology of both species. Eleven morphological attributes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding; Coexistence; Spatial segregation; Copella nigrofasciata; Pyrrhulina aff. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000100025 |
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| GARCÍA-ROSALES,Aaron; ARRIAGA-NOGUΕΖ,Alicia; RAMÍREZ-BAUTISTA,Aurelio. |
| ABSTRACT The genera Iguana and Ctenosaura belong to the Iguanidae family, and populations of most species of these genera have decreased due to anthropogenic effects. The natural history of most species of this family is poorly known, including Ctenosaura similis. Therefore, this study documents some ecological aspects of the species, such as its feeding habits, and habitat and microhabitat use in a population of Isla Contoy in Quintana Roo, Mexico. The data showed that even though C. similis is distributed throughout the island, individuals more commonly use human construction (buildings) of Parque Nacional Isla Contoy (PNIC) and mangrove areas. Microhabitats most used by all age classes and sexes were rocks and trees. The diet of the species is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal ecology; Animal population; Feeding; Opportunistic species; Reptilia. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000300394 |
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| Barbosa, Moysés Cavichioli; Universidade Federal de Santa Catarina; Neves, Fábio de Fárias; Universidade Federal de Santa Catarina; Cerqueira, Vinicius Ronzani; Universidade Federal de Santa Catarina. |
| O conhecimento da taxa ótima de alimentação para uma determinada espécie não só é importante para promover o maior crescimento e a melhor eficiência na alimentação, mas também para prevenir a deterioração de qualidade de água como resultado do excesso de alimento. O presente estudo teve como objetivo avaliar o desempenho do robalo-peva, Centropomus parallelus cultivado em tanques-rede flutuantes sob o efeito de diferentes taxas alimentares (1; 1,5; 2 e 2,5% da biomassa ao dia e a taxa controle que foi até a saciedade), em condições de cultivo no ambiente natural. Durante 40 dias, cada tratamento foi avaliado em triplicatas e foram verificados os parâmetros biológicos (sobrevivência, taxa de crescimento específico, peso e comprimentos médios finais) e... |
| Tipo: Criação em condições naturais |
Palavras-chave: 5.06.03.00-0 Alimentação; Centropomus parallelus; Crescimento; Cultivo intensivo; Piscicultura Centropomus parallelus; Feeding; Fish culture; Growth; Intensive rearing. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/11413 |
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| Pimentel, Leidiane Reis; Silva, Fabiano Ferreira da; Silva, Robério Rodrigues; Schio, Alex Resende; Rodrigues, Eli Santana de Oliveira; Oliveira, Paulo Andrade de. |
| This study aimed to evaluate the effect of including of palm kernel cake on feeding behavior of lactating crossbred cows. Twelve crossbred Holstein x Zebu cows were distributed in three 4 x 4 latin squares, with the following treatments: control; inclusion of 5%; inclusion of 10%; inclusion of 15% palm kernel cake in the diet dry matter. The animals were observed during four periods as to feeding behavior, 24 hours in each period. There was no effect of inclusion of palm kernel cake (p > 0.05) on time spent on eating, ruminating and idling. The feeding efficiencies of dry matter and corrected neutral detergent fiber, total digestible nutrients, and the rumination efficiency of corrected neutral detergent fiber were not influenced (p > 0.05). There... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavioral activities; Feeding; Feed efficiency; Dry matter; Idle; Rumination. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/23391 |
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| Signor, Altevir; Lewandowski, Vanessa; da Silva, Rodrigo Aguiar; Fries, Edionei Maico; Schuller, Jean Marcel. |
| This study aimed to evaluate the digestibility of plant energetic ingredients, corn, sorghum and wheat bran, with and without phytase supplementation, in silver catfish (Rhamdia voulezi). The experimental design was completely randomized, represented by eight treatments, which consisted of the development of a reference diet and a test diet for each ingredient evaluated (corn, sorghum and wheat bran), with and without supplemental phytase. Diets were formulated so as to contain 70% reference feed and 30% test ingredient. The digestibility coefficients of dry matter and crude protein were significantly influenced only in relation to the evaluated ingredients. Phytase influenced the digestibility coefficients of energy and phosphorus, with interaction... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding; Enzyme; Plant energetic ingredients; Silver catfish. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/32054 |
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| Costa, Simone Almeida Gavilan Leandro da; UERN; Peretti, Danielle; UERN; Pinto Júnior, José Egberto Mesquita; UERN; Fernandes, Maria Aparecida; UERN; Gurgel Júnior, Antonio Maria; UERN. |
| Avaliaram-se a dieta e as variações sazonais na alimentação de Plagioscion squamosissimus, capturados mensalmente, na lagoa do Piató, Assu, Estado do Rio Grande do Norte, entre agosto de 2004 e julho de 2005, com despescas em horários específicos. Em laboratório, após a biometria, os peixes foram abertos e eviscerados. Sob microscópio estereoscópico, analisaram-se os conteúdos estomacais, cujos itens, depois de identificados, tiveram o seu volume medido. Foram calculadas as frequências de ocorrência e volumétrica e o índice alimentar. Agruparam-se os itens em sete categorias principais, e camarão e insetos foram as predominantes. A categorização dos itens permitiu classificar a espécie como carnívora com tendência a carcinofagia-insetivoria. Quanto à... |
| Tipo: Dieta; indice alimentar; variação sazonal |
Palavras-chave: 2.00.00.00-6 Ciências Biológicas Plagioscion squamosissimus; Alimentação; Água doce; Índice alimentar Ecologia Plagioscion squamosissimus; Feeding; Freshwater; Food index. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2140 |
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| Registros recuperados: 233 | |
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