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Registros recuperados: 6
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Canopy characteristics, animal behavior and forage intake by goats grazing on Tanzania-grass pasture with different heights - doi: 10.4025/actascianimsci.v34i4.14544 Animal Sciences
Ribeiro, Aline Mendes; Universidade Federal do Piauí; Oliveira, Maria Elizabete de; Universidade Federal do Piauí; Silva, Patrícia Carvalho da; Universidade Federal do Piauí; Rufino, Marcelo de Oliveira Alves; Universidade Federal do Piauí; Rodrigues, Marcônio Martins; Universidade Federal do Piauí; Santos, Maurílio Souza dos; Universidade Federal do Piauí.
This study evaluated the influence of Tanzania-grass sward height (30, 50, 70 and 90 cm) on the morphological characteristics of the canopy, grazing behavior and forage intake by adult Anglo Nubian female goats. A completely randomized experimental design was employed, with two replicates in space and two replicates in time. Six animals were used to assess the grazing behavior, and four, the ingestion process. The rise in sward height increased the forage and leaf mass, the percentages of stem and dead material, and reduced the leaf stem-1 ratio. Above 50 cm there was an increase in grazing time and a decrease in leisure time. A positive linear correlation was detected between sward height and bite depth. The consumed forage mass, ingestion rate and daily...
Tipo: Pesquisa de campo Palavras-chave: 5.04.04.00-8 consumption; Forage production; Bite rate; Ingestion rate; Grazing time.
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/14544
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Feeding the pearl oyster Pinctada margaritifera during reproductive conditioning ArchiMer
Le Moullac, Gilles; Soyez, Claude; Sham-koua, Manaarii; Levy, Peva; Moriceau, Jacques; Vonau, Vincent; Maihota, Mayalen; Cochard, Jean-claude.
This study aimed to model the food intake of P. margaritifera in order to examine the relationship between food level and reproductive activity. The effect of microalgae concentration on ingestion rate and assimilation efficiency was studied over a broad concentration range, using a mixture of Isochrysis galbana and Chaetoceros gracilis. Reproductive effort was assessed using three microalgae concentrations of 0.5, 7 and 18 cell μL-1. Reproductive status was assessed by gonad development index (GDI) – the ratio of the gonad surface to the visceral mass surface – and histological analysis of the gonad based on the presence (continuous or discontinuous) or the absence of gonial cells (GC). Ingestion is a saturating function of seston concentration for...
Tipo: Text Palavras-chave: Pinctada margaritifera; Food level; Ingestion rate; Reproduction; Gametogenesis.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00050/16085/13562.pdf
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Jellyfish as an alternative source of food for opportunistic fishes ArchiMer
Marques, Raquel; Bouvier, Corinne; Darnaude, Audrey M.; Molinero, Juan-carlos; Przybyla, Cyrille; Soriano, Solenn; Tomasini, Jean-antoine; Bonnet, Delphine.
Although scientific interest on jellyfish ecology has substantially increased in the last decades, little is known on the role of potential predators shaping their population dynamics. Jellyfish were long considered as ‘dead ends’ within food webs, and therefore overlooked as potential food source for higher trophic levels, e.g. fishes. Here this question is tackled by using comprehensive laboratory experiments assessing fish predation on jellyfish. The approach included all the life stages (polyps, ephyrae and medusa) of Aurelia sp. versus more traditional aquaculture feeds in an easily farmed opportunistic fish, the gilthead seabream Sparus aurata (L.). Results revealed that all life stages of Aurelia sp. were accepted as a source of food by S. aurata,...
Tipo: Text Palavras-chave: Aurelia sp.; Predation; Fish; Sparus aurata; Ingestion rate; Energy pathways.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00349/46018/46026.pdf
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Physiological responses of female and male black-lip pearl oysters (Pinctada margaritifera) to different temperatures and concentrations of food ArchiMer
Chavez-villalba, Jorge; Soyez, Claude; Aurentz, Hermann; Le Moullac, Gilles.
This study was designed to measure responses of four-year-old black-lip pearl oysters (Pinctada margaritifera) to different temperatures and food concentrations and to identify the energy requirements of each sex. Oysters were fed a monospecific microalgal diet of Isochrysis affinis galbana (T-iso). Measurements of oxygen consumption and ingestion rates were carried out at 24 degrees C and 27 degrees C and at two algal (T-iso) concentrations: 5000 and 30 000 cell ml(-1). Glycogen content in adductor muscle, absorption efficiency and scope for growth were also estimated. Females and males responded differently to environmental factors, with food level being the most influential parameter. Oxygen consumption and absorption efficiency were significantly...
Tipo: Text Palavras-chave: Food supply; Ingestion rate; Glycogen; Oxygen consumption; Scope for growth; Pearl oyster.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00157/26855/24980.pdf
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Влияние условий питания на скорость потребления и переваривания пищи у лопастного гребневика Mnemiopsis leidyi IBSS Repository
Финенко, Г. А.; Романова, З. А.; Аболмасова, Г. И.; Аннинский, Б. Е.; Губарева, Е. С.; Бат, Л.; Кидейс, А..
Изучен эффект условий питания (концентрации пищи, объема экспериментальных сосудов) на скорость по­требления, фильтруемый объем и время переваривания у лопастного гребневика-вселенца в Черное море Mnemiopsis leidyi. Установлено, что связь между скоростью питания (I, экз экз -1 ) и концентрацией пищи (С, экз л -1) описывается уравнением прямой 1 = 0.374 С + 1.731 с высоким коэффициентом детерминации 0.869. Объем воды, освобожденный животным от пищевых организмов в единицу времени, практически остается постоянным в широком диапазоне исследованных концентраций, составляя в среднем 0.294±0.076 л г -1 сы­рой массы час -1 у животных длиной 20 - 30 мм. У крупных гребневиков 40-50 мм он вдвое ниже-0.129±0.038 лг -1 сырой массы час -1. В диапазоне исследованных...
Tipo: Journal Contribution Palavras-chave: Mnemiopsis leidyi; Скорость питания; Интенсивность фильтрации; Время переваривания; Черное море; Ingestion rate; Clearance rate; Digestion time; Ctenophore Ingestion Digestion Digestion http://aims.fao.org/aos/agrovoc/c_2271.
Ano: 2005 URL: http://repository.ibss.org.ua/dspace/handle/99011/195
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Время переваривания пищи и интенсивность питания личинок гребневика Mnemiopsis leidyi A. Agassiz (Ctenophora, Lobata). IBSS Repository
Финенко, Г. А.; Павловская, Т. В.; Романова, З. А.; Аболмасова, Г. И.; Дацык, Н. А..
Изучено влияние условий питания (вид и концентрация пищи, размер хищника и жертвы, количество жертв в кишечнике) на время переваривания и скорость потребления пищи у личинок лопастного гребневика Mnemiopsis leidyi. Время переваривания у личинок длиной 0.5 – 9.5 мм при потреблении пищевых объектов 9 видов, различающихся по размерам более чем на порядок (от 0.15 – науплии акарции до 1.8 мм – личинки креветок), зависело от вида пищи и размеров личинок, снижаясь по мере роста личинок и уменьшения размера жертв. Связь между скоростью питания (R, экз.–1) и концентрацией пищи (N, экз. л–1) описывалась линейным уравнением R = 0.04N – 0.71 и R = 0.02N + 2.4 при потреблении науплий Acartia sp. 5 и 9 мм личинками мнемиопсиса соответственно. В диапазоне...
Tipo: Journal Contribution Palavras-chave: Mnemiopsis leidyi; Время переваривания; Микрозоопланктон; Освобождённый объём; Скорость питания; Суточный рацион; Digestion time; Microzooplankton; Clearance rate; Ingestion rate; Feeding rate; Daily ration; Час травлення; Мікрозоопланктон; Звільнений об’єм; Швидкість живлення; Добовий раціон.
Ano: 2008 URL: http://repository.ibss.org.ua/dspace/handle/99011/822
Registros recuperados: 6
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