SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Estudio comparado de la alimentación entre algunos predadores de alto nivel trófico de la comunidad marina del norte y centro de patagonia

Bas, C..

El ciclo de vida de los cangrejos verdaderos (Crustacea, Brachyura) incluye en la mayoria de los casos cuatro etapas. Una etapa embrionaria, en la cual los huevos en desarrollo protegidos por una membrana de varias capas, se mantienen adheridos a los ple6podas de la hembra, expuestos a las mismas condiciones ambientales que el adulto . Posteriormente una etapa larval planct6nica y finalmente una fase juvenil y una adulta, ambas bent6nicas en igual o diferente ambiente . Muy frecuentemente [as historias de vida de los organismos son referidas como rigidamente definidas para cada especie, sin embargo existen numerosos ejemplos en invertebrados donde las caracteristicas del desarrollo y la reproducci6n de una especie son ampliamente influenciadas y...

Tipo: Theses and Dissertations

Palavras-chave: Salinity effects; Temperature effects; Life cycle; Comparative studies; Larval development; Embryonic development; Feeding; Reproduction; Seasonal variations; Feeding; Embryonic development; Life cycle; Reproduction; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_2545; Http://aims.fao.org/aos/agrovoc/c_4317; Http://aims.fao.org/aos/agrovoc/c_6507.

Ano: 2001

URL: http://hdl.handle.net/1834/2972

Efecto de diferentes niveles de alimentación para Clarias gariepinus en preceba

Koen Alonso, M..

The comparative analysis of the food habits between top predator allows the evaluation of how these species use the trophic resources. They also make possible the study of potentially competitive relationships and the role of these predators in the regulation and structure of the community. The marine community of northern and central Patagonia is structured on the tri-trophic system composed by the Argentine anchovy (Engraulis anchoita), the Argentine shortfin squid (Illex argentinus), and Argentine hake (Merluccius hubbsi). Several marine mammals and elasmobranchs use these species as food resources. For this reason, the objective of this work was to analyze comparatively the diet of the South American sea lion (Otaria flavescens), the dusky dolphin...

Tipo: Theses and Dissertations

Palavras-chave: Feeding; Predators; Diets; Trophic relationships; Feeding; Predators; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_6163.

Ano: 1999

URL: http://hdl.handle.net/1834/2954

Llanes Iglesias, J.; Toledo Pérez, J..

Se evaluaron cuatro niveles de alimentación en el comportamiento productivo de Clarias gariepinus (8,0 + 0,01 g de peso medio inicial) en la etapa de preceba, mediante un diseño completamente aleatorizado. Los tratamientos fueron: TI- Pienso vegetal al 5 % del peso corporal; TII- Pienso vegetal al 3 % y desechos pesqueros al 2 % del peso corporal; TIII- Pienso vegetal al 3 % y desechos pesqueros al 2 % en base seca (que representó el 6 % en base húmeda) del peso corporal y TIV- Pienso vegetal y desechos pesqueros según Tabla del Laboratorio de Nutrición. Los mejores crecimientos (p < 0,001) se encontraron con los tratamientos TIII y TIV (111,2 y 116 g de pesos finales, respectivamente), los que se correspondieron con los niveles de alimentación más...

Tipo: Journal Contribution

Palavras-chave: Fish wastes; Feeding.

Ano: 2012

URL: http://hdl.handle.net/1834/5705

Desarrollo de un banco de reproductores de Róbalo (Centropomus undecimalis, Bloch 1792): I. Manejo del alimento

Conducta alimentaria del camarón Litopenaeus vannamei durante la época invernal en estanques de tierra

Fraga, I.; Reyes, R.; Ortega, N.; Regueira, E.; Font, R.; Bravo, A..

In order to establish the management methods in snook Centropomus undecimalis (Bloch, 1792) broodstock (initial average weight 960 g), during 18 month three phases were developed. Fishes were marked, measured, weighed and distributed in 5 m3 fiber glass tanks (stock density 1.3 kg/m3). In the first phase (3 month), different feeding schedules were applied: 1. feeding in alternate days; 2. feeding every day excluding weekends; 3. feeding twice a day. Before maturation phase and during three month, enriched semi humid food was supplied. Finally, during 12 month, artificial feed was supplied. The appetite dynamics in fishes was influenced by the feeding schedule applied. When food was offered in alternate days, higher consumption was observed. Females showed...

Tipo: Proceedings Paper

Palavras-chave: Fish culture; Feeding; Brood stocks; Fish culture; Feeding; Http://aims.fao.org/aos/agrovoc/c_2918; Http://aims.fao.org/aos/agrovoc/c_2838.

Ano: 2006

URL: http://hdl.handle.net/1834/2077

Resultados de la campaña de evaluación de peces demersales australes efectuada en el verano de 1997.

Alvarez, J.S.; Sorí, M.A.; Pelegrin, E.; Galindo, J..

Esta investigación se realizó en la camaronera CULTIZAZA, Sancti Spiritus, ante la necesidad de continuar profundizando sobre el comportamiento alimentario del camarón blanco del Pacífico Litopenaeus vannamei, como una vía más para mejorar las condiciones financieras y salud de la camaronicultura cubana. Los resultados indicaron que en época de invierno se requiere de mayor vigilancia en el manejo del alimento en los estanques de cultivo respecto al verano, para evitar suministros innecesarios de alimento que incrementarían la contaminación en los estanques, las situaciones de estrés y aparición de enfermedades que conspiran finalmente con la rentabilidad de la granja.

Tipo: Book Section

Palavras-chave: Feeding; Shrimp culture; Feeding; Http://aims.fao.org/aos/agrovoc/c_2838.

Ano: 2011

URL: http://hdl.handle.net/1834/4015

Evaluación De La Harina De [Spirulina Platenses] Como Alimento Y Aditivo Para La Producción De Postlarvas De Camarón Blanco [Litopenaeus Schmitti] (Pérez-Farfante Y Kensley, 1997)

Wöhler, O.C.; Giussi, A.R.; García de la Rosa, S.B.; Sánchez, M.F.; Hansen, J.E.; Cordo, H.D.; Alvarez Colombo, G.L.; Incorvaia, I.S.; Reta, R.; Abachián, V.E..

An assessment survey on the austral fish was carried out during the summer 1997 on both the shelf and slope off southern Argentina. The cruise covered 101,508 nm2 between 45° and 54° 30'S and depths between 50 and 400 m. The survey did not include the area controlled by the United Kingdom. Considering the total area as an undivided stratum, a random sampling was used to estimate demersal fish biomass and a delta distribution-based model to evaluate mean densities. Out of the forty five species caught 28 were bony fish and 17 elasmobranch. Four cephalopod mollusc species were also identified. A biomass of 3.2 million tons (CI(95o/o): 1.90 - 6.06 millions) proved that longtail hake was the most abundant resource within the region followed by common hake...

Tipo: Journal Contribution

Palavras-chave: Demersal fisheries; Fishery surveys; Biomass; Population structure; Feeding; Parasitism; Environmental conditions.

Ano: 1999

URL: http://hdl.handle.net/1834/5782

Studies of the life-history and energetics of marine and brackish-water nematodes: 2. Production, respiration and food uptake by Monhystera disjuncta

Jaime Ceballos, B..

The high cost of using live microalgae and the variations in nutritional value during larval culture constitute a problem for any operation relying on the massive culture of unicellular microalgae. The price of Artemia cysts in the international market and the increasing demand in Cuba, due to the development of the shrimp culture industry, has made the search of feeding alternatives that can of satisfactory diminish the live food consumption in shrimp larviculture, essential. Spirulina platensis meal (SPM), produced commercially in Cuba, has optimal nutritional characteristics to be used as a food ingredient in any aquatic animal culture. For that reason in this thesis we set out to improve the efficiency in the production of Litopenaeus schmitti shrimp...

Tipo: Theses and Dissertations

Palavras-chave: Feeding; Feeding; Http://aims.fao.org/aos/agrovoc/c_2838.

Ano: 2006

URL: http://hdl.handle.net/1834/1547

OMA

Herman, P.M.J.; Vranken, G..

An energy budget was constructed for the marine nematode Monhystera disjuncta. Respiration was measured with a modified Cartesian diver technique, in which the nematodes were kept in agar inside the diver 'head'. The relationship between respiration and body weight was: R=1.53 W0.75. Body growth was exponential during the juvenile phase, with a growth rate equal to 0.61 d-1. After maturation the growth rate fell to 0,17 d-1. Food uptake was measured in experiments with radiolabeled bacteria. In one series of experiments the accumulation of radiolabel in the nematodes was followed. In a second series the decrease in labeling was followed when pre-labeled nematodes fed on...

Studies of the life-history and energetics of marine and brackish-water nematodes: 1. Demography of Monhystera disjuncta at different temperature and feeding conditions

Palavras-chave: Bioenergetics; Brackishwater environment; Energy budget; Energy flow; Feeding; Life history; Meiobenthos; Respiration; Monhystera disjuncta; Nematoda [Nematodes].

Ano: 1988

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3146

OMA

Vranken, G.; Herman, P.M.J.; Heip, C.H.R..

Aspects of the demography of Monhystera disjuncta were investigated at different feeding conditions (monoxenic cultures with different bacterial strains, and different densities in the feeding suspension with one strain). Embryonic development time, minimum generation time, egg deposition rate and adult longevity depend on temperature, quality and quantity of food offered. Body mass at maturity is an allometric function of food density. It is shown that a previously inferred selectivity in food uptake is an artifact of culture conditions. pH buffering and addition of sterols permit culture of the species on a wide variety of bacterial strains. M. disjuncta is less well adapted to take advantage of high food density...

Feeding of the brine shrimp Artemia on yeast: effect of mechanical disturbance, animal density, water quality and light intensity

Palavras-chave: Bioenergetics; Brackishwater environment; Cultured organisms; Feeding; Life history; Marine environment; Meiobenthos; Temperature effects; Water temperature; Monhystera disjuncta.

Ano: 1988

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3159

OMA

Coutteau, P.; Sorgeloos, P..

Details are given of experiments conducted to determine the effects of tank culture conditions on the feeding of Artemia. Mechanical disturbance, animal density and water quality were found to affect the feeding rate of Artemia. The importance of culture conditions in maintaining a rate of food consumption which does not limit the growth of the brine shrimp is stressed.

Optimal Contracting for Cattle Feeding: An Assessment of Climatic Conditions

Palavras-chave: Brine shrimp culture; Culture tanks; Feeding; Water quality; Artemia.

Ano: 1989

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2811

AgEcon

Rahman, Shaikh Mahfuzur.

A unique approach using a biophysical growth model from the animal science literature is used to examine optimal contract cattle feeding behavior under alternative climatic conditions. The examination of incentives and outcomes in an unusually comprehensive contract parameter and behavioral space is made possible by combining simulated feedlot and carcass performance of a large set of cattle with public price and weather data. The model uniquely fits typical risk aversion levels and rationalizes existing contract types. The results show that optimal cattle feeding contract varies with climatic condition, but there is a tendency to replace cost-of-gain contracts with yardage-feed contracts as grid pricing has emerged.

Tipo: Conference Paper or Presentation

Palavras-chave: Cattle; Feeding; Contracts; Climate; Industrial Organization; D80.

Ano: 2010

URL: http://purl.umn.edu/61451

Breeding and feeding pigs in Australia and Vietnam

AgEcon

Tisdell, Clement A.; Wilson, Clevo.

This report establishes that ACIAR Research Project AS2/1994/023, ‘Breeding and feeding pigs in Australia and Vietnam’ (supported by ACIAR from July 1995 to the end of 2000) has yielded an extraordinarily high rate of economic return on the funds invested. The collaborating agencies were the Department of Primary Industries, Queensland, James Cook University and The University of Queensland in Australia, and the Institute of Agricultural Sciences of South Vietnam in Vietnam. The best estimate benefit–cost ratio for investment in this project is at least 159:1 with a corresponding internal rate of return of 900% and a net present value of A$496 million. This is a total value, not an annual value. To give context to the number A$496 m, in 2000, 1.3 million...

Tipo: Book

Palavras-chave: Pig; Vietnam; Australia; Breeding; Feeding; High rate of return; High impact; High economic return; DPI QLD; James Cook University; University of QLD; Institute of Agricultural Sciences of South Vietnam; Benefit-cost ratio; Net present value; Internal rate of return; Significant returns; Genetic; Nutrition; Pork; Agribusiness; Farm Management; Food Consumption/Nutrition/Food Safety; International Development; Livestock Production/Industries; Production Economics.

Ano: 2001

URL: http://purl.umn.edu/47695

TAKARMÁNYOZÁSI VIZSGÁLATOK EREDMÉNYEI AZ ÖKOLÓGIAI BÁRÁNYNEVELÉSBEN

AgEcon

Monori, Istvan; Feher, Alajos; Csizi, Istvan; Czimbalmos, Robert.

Az ökológiai gazdálkodás hazai terjedésével felértékelődnek a juhászat sajá-tosságaival foglalkozó kutatások. Az ágazaton belül a báránynevelés takarmá-nyozási kérdéseivel foglalkozó munkánk során – módszertani kérdések megoldá-sa mellett – a hatékonyság javítási lehetőségeit keressük. A kísérletek első éve azt mutatja, hogy az ökológiai gazdálkodásban a báránytakarmánnyal nem sikerült olyan hozamot és olyan naturális hatékonyságot produkálni, mint a konvencio-nális gazdálkodásban az évek során kialakult speciális báránytápokkal. Kísérle-teink alapján a takarmányozás hatékonyságának javításánál a hozamok szerepe kiemelkedő, mert csak a költségcsökkentés nem tűnik járható útnak. A gazdál-kodók számára új takarmányozási technológiák kidolgozása és a...

Tipo: Journal Article

Palavras-chave: Ökológiai gazdálkodás; Takarmányozás; Báránynevelés; Bioélelmiszer; Naturális és gazdasági hatékonyság; Ecological farming; Feeding; Lamb rearing; Organic food; Natural and economic effectiveness; Agribusiness; Livestock Production/Industries.

Ano: 2007

URL: http://purl.umn.edu/57689

Performance, carcass yield, and meat quality of free-range broilers fed wet grain corn silage

Rev. Bras. Ciênc. Avic.

Saldanha,ESPB; Mendes,AA; Pizzolante,CC; Takahashi,SE; Komiyama,CM; Garcia,RG; Balog Neto,A; Paz,ICLA; Garcia,EA; Dalanezi,JA; Quinteiro,RR.

This study aimed at evaluating the effect of total replacement of dry corn by wet grain corn silage (WGCS) in the feed of label broilers older than 28 days of age on performance, mortality, carcass, parts, breast meat and thighs meat yields, and meat quality. A mixed-sex flock of 448 ISA S 757-N (naked-neck ISA JA Label) day-old chicks was randomly distributed in to randomized block experimental design with four treatments (T1 - with no WGCS; T2 - WGCS between 28 and 83 days; T3 - WGCS between 42 and 83 days; and T4 - WGCS between 63 and 83 days) and four replicates of 28 birds each. Birds were raised under the same management and feeding conditions until 28 days of age, when they started to have free access to paddock with pasture (at least 3m²/bird) and...

Effect of squash seed meal (Cucurbita moschata) on broiler performance, sensory meat quality, and blood lipid profile

Palavras-chave: Feeding; Label chickens; Production; Rearing system.

Ano: 2006

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000200007

Rev. Bras. Ciênc. Avic.

Aguilar,YM; Yero,OM; Navarro,MIV; Hurtado,CAB; López,JAC; Mejía,LBG.

In this experiment, 240 Cobb-500® broilers reared from1 to 49 days, and distributed according to a completely experimental randomized design with four treatments of four replicates each in order to evaluate the effect of the dietary inclusion of 0, 33, 66 or 100 g/kg of squash seed meal (SSM) (Cucurbita moschata) on the performance, carcass yield, serum lipid profile and sensory meat quality of broilers. Significant differences (p<0.05) were detected in performance, carcass weight, weight and breast yield, and leg weight. The best results were obtained with 33 and 66 g/kg as compared to the control diet and 100 g SSM /kg. Abdominal fat decreased with the inclusion of 66 and 100 g SSM / kg, but the sensory quality of breast and thighs was not affected by...

Effects of sex, host-plant deprivation and presence of conspecific immatures on the cannibalistic behavior of wild Ascia monuste orseis (Godart) (Lepidoptera, Pieridae)

Palavras-chave: Broilers; Feeding; Lipids; Squash seed meal.

Ano: 2011

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000400001

Rev. Bras. entomol.

Santana,Alessandra F. K.; Zago,Rosana C.; Zucoloto,Fernando S..

Effects of sex, host-plant deprivation and presence of conspecific immatures on the cannibalistic behavior of wild Ascia monuste orseis (Godart) (Lepidoptera, Pieridae). The specialist cabbage caterpillar Ascia monuste orseis (Lepidoptera, Pieridae) feeds on plants of the Brassicaceae family, but may eventually ingest conspecific eggs and larvae during the larval stage. The present study examines feeding behavior of 4th and 5th instar cabbage caterpillars in relation to sex, host-plant deprivation and presence of conspecifics. We recorded number of egg ingested per larvae, developmental indices and duration of feeding, exploratory and resting behavior. Kale deprived caterpillars presented high rates of cannibalism, development delay and decreased...

Use of food resources and resource partitioning among five syntopic species of Hypostomus (Teleostei: Loricariidae) in an Atlantic Forest river in southern Brazil

Palavras-chave: Brassicaceae; Cannibalism; Feeding; Herbivorous insects.

Ano: 2011

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000100015

Abilhoa,Vinicius; Valduga,Marcos O.; Frehse,Fabricio de A.; Vitule,Jean R.S..

ABSTRACT We analyzed the diet and resource partitioning among five syntopic species of Hypostomus Lacépède, 1803 in the Corumbataí River in southeastern Brazil. The gut contents of 352 individuals were assessed and 21 food items were identified and quantified under an optical microscope. The food items found in the gut contents indicate that these suckermouth loricariids are bottom-dwelling detritivorous/periphytivorous catfishes. PERMANOVA and SIMPER analyses indicated variation in the consumption of some resources, and the contribution of periphytic algae was primarily responsible for such dissimilarity. ECOSIM analyses of dietary overlap showed evidence of resource sharing among all species in the dry and rainy periods. This is most likely the result of...

Diet of Brachycephalus brunneus (Anura: Brachycephalidae): in the Atlantic Rainforest of Paraná, southern Brazil

Palavras-chave: Armoured catfish; Feeding; Food overlap; Periphyton; Siluriformes.

Ano: 2016

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000600700

Fontoura,Pedro Luiz; Ribeiro,Luiz Fernando; Pie,Marcio Roberto.

Saddleback toads (Brachycephalidae: Brachycephalus) are a remarkable group of highly endemic species from the southern Atlantic Rainforest of Brazil. They are brightly colored, diurnal, minute frogs that live in the leaf litter of high-elevation cloud forests. Little is known about the natural history of these frogs, particularly their diet. In the present study we provide the first published account of a Brachycephalus species diet. Specimens of Brachycephalus brunneus Ribeiro, Alves, Haddad & Reis, 2005 (N = 20) were collected from two locations in the Serra do Mar mountain range in the state of Paraná, southern Brazil. A total of 137 food items were recorded, with Acari being the most common item (62.4%). This prevalence is much higher than the...

The foraging behavior of the Large-headed Flatbill, Ramphotrigon megacephalum and the Dusky-tailed Flatbill, Ramphotrigon fuscicauda (Aves: Tyrannidae)

Palavras-chave: Acari; Feeding; Foraging; Litter frog.

Ano: 2011

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000500019

Melo,Tomaz Nascimento de; Guilherme,Edson.

ABSTRACT Southwestern Amazonia has great bird diversity which includes birds specialized in bamboo forests. In this region, bamboo is considered a key element of the landscape. The objective of this study was to investigate and describe the foraging behavior of the Large-headed Flatbill, Ramphotrigon megacephalum (Swainson, 1835) and the Dusky-tailed Flatbill, Ramphotrigon fuscicauda Chapman, 1925, which occur sympatrically in the region and are considered bamboo specialists. This study was conducted between November 2013 and September 2014, within two fragments in the eastern portion of the state of Acre: Fazenda Experimental Catuaba, in the municipality of Senador Guiomard; and Reserva Florestal Humaitá, in Porto Acre. A total of 109 and 97 foraging...

Great unexpected differences between two populations of the intertidal crab Neohelice granulata inhabiting close but contrasting habitats (Crustacea: Decapoda: Brachyura)

Palavras-chave: Bamboo; Feeding; Flycatchers; Guadua; Specialization.

Ano: 2016

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000600301