|
|
|
| Registros recuperados: 233 | |
|
| |
|
| |
|
|
| Leal,A.M.O.; Moreira,A.C.. |
| Temporal organization is an important feature of biological systems and its main function is to facilitate adaptation of the organism to the environment. The daily variation of biological variables arises from an internal time-keeping system. The major action of the environment is to synchronize the internal clock to a period of exactly 24 h. The light-dark cycle, food ingestion, barometric pressure, acoustic stimuli, scents and social cues have been mentioned as synchronizers or" zeitgebers". The circadian rhythmicity of plasma corticosteroids has been well characterized in man and in rats and evidence has been accumulated showing daily rhythmicity at every level of the hypothalamic-pituitary-adrenal (HPA) axis. Studies of restricted feeding in rats are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding; Glucocorticoids; CRH; ACTH; Circadian rhythm. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001200003 |
| |
|
|
| Natchev, N.; Tzankov, N.; Vergilov, V.; Kummer, S.; Handschuh, S.. |
| The snake-eyed skink Ablepharus kitaibelii is one of the smallest European lizards, but despite its minute size it is able to feed on comparatively large prey. Here we investigate the diet of A. kitaibelii and the mechanisms that allow the skink to overpower relatively large and even noxious prey. High-speed cinematography showed that A. kitaibelii uses a series of shaking and battering movements to immobilise and kill prey prior to swallowing. During this process, the skinks rises up on the hind limbs and then whacks the prey sidewise on the substrate by twisting the trunk, neck and head laterally. Our analysis showed that the shaking kinematics is very uniform among the investigated specimens. The morphological investigation of the cranio-cervical system... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Evolution; Feeding; Neck; Odontoid; Parallel; Skink; ΜCT; 42.82. |
| Ano: 2015 |
URL: http://www.repository.naturalis.nl/record/515947 |
| |
|
|
| Spivak,Eduardo D.; Bas,Claudia C.; Luppi,Tomás A.. |
| ABSTRACT Two populations of the Southwestern Atlantic burrowing crab, Neohelice granulata (Dana, 1851), are separated by only 190 km. They inhabit bays that drain into a Patagonian gulf in the southernmost limit of the geographical distribution of the species: San Antonio Bay (SAO) and San José Gulf (RSJ). The population from SAO has been extensively studied, whereas that of RSJ has not. The main goal of this study is to compare the ecological and habitat characteristics of the two populations, based on samples collected on successive days during the middle of the reproductive season of the crab. The substrate of SAO is composed of a high proportion of gravel and scarce organic matter, whereas the substrate of RSJ presents twice as much silt and clay, and... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Argentine; Estuaries; Crab; Fecundity; Feeding; Growth; Maturity; Sediment. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000604001 |
| |
|
| |
|
|
| Amara, Rachid; Mahe, K; Le Pape, Olivier; Desroy, N. |
| Growth, condition, diet and spatial distribution of the solenette Buglossidium luteum (Risso, 1810) were investigated along the coasts of the French Atlantic, eastern English Channel and Southern Bight of the North Sea. Distribution and habitat preferences of solenette were analysed in relation to physical and biological features presumed to influence fish distribution. B. luteum was patchily distributed and concentrated in shallow muddy and muddy-sand bottoms moderately influenced by estuarine waters (euhaline waters). In the studied area, solenette seemed to find habitats suitable for growth. Food availability was not assumed to be a limiting factor for solenette distribution in contrast to abiotic factors such as salinity. |
| Tipo: Text |
Palavras-chave: Solenette; Habitat suitability; Distribution; Feeding; Growth. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-777.pdf |
| |
|
|
| Djeghri, Nicolas; Atkinson, Angus; Fileman, Elaine S.; Harmer, Rachel A.; Widdicombe, Claire E.; Mcevoy, Andrea J.; Cornwell, Louise; Mayor, Daniel J.. |
| There has been an upsurge of interest in trait-based approaches to zooplankton, modelling the seasonal changes in the feeding modes of zooplankton in relation to phytoplankton traits such as size or motility. We examined this link at two English Channel plankton monitoring sites south of Plymouth (L4 and El). At L4 there was a general transition from diatoms in spring to motile microplankton in summer and autumn, but this was not mirrored in the succession of copepod feeding traits; for example the ambushing Oithona similis dominated during the spring diatom bloom. At nearby El we measured seasonality of food and grazers, finding strong variation between 2014 and 2015 but overall low mesozooplankton biomass (median 4.5 mg C m(-3)). We also made a seasonal... |
| Tipo: Text |
Palavras-chave: Copepod; Zooplankton biomass; Feeding; Selectivity; Intraguild predation; Predator-prey size ratio; Western Channel Observatory; Sloppy feeding. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00616/72783/83484.pdf |
| |
|
| |
|
| |
|
| |
|
|
| Goulletquer, Philippe; Geairon, Philippe; Faury, Nicole; Razet, Daniel; Soletchnik, Patrick; Gras, Paul; Adessi, L.. |
| In European waters, significant economic damages to wooden structures are caused by bivalves molluscs and crustaceans. Treatments like copper-chrome-arsenic mixtures (CCA) were designed to prevent settlement of these wood borer species. However, limited and conflicting evidence regarding the toxicity to non-target organisms are available in the literature. This report aims to provide insights regarding the CCA leachates' toxicity to an important aquaculture species, the blue mussel Mytilus edulis for which much information on normal and stressed physiology is available for purposes of comparisons. The mussels are usually considered as a particularly suitable species for biological monitoring (Smaal and Widdows, 1994). To address the CCA leachate issue, two... |
| Tipo: Text |
Palavras-chave: Bivalvia; Mussel; Mytilus edulis; Copper-chrome-arsenic (CCA); Treatment; Feeding; Absorption. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00043/15437/12788.pdf |
| |
|
|
| Gaignon, Jean-louis; Petton, Bruno; Quemener, Loic. |
| During larval rearing phase of turbot, a substantial variability in survival and growth is frequently observed. In this paper, we studied the effects of hydrodynamics in larvae rearing tanks on the survival and the growth of fed and starved larvae, using the following conditions: water flows of 600 and 1200 ml.mn(-1), constant and progressive ones, air flows of 10 and 30 ml.mn(-1), downward and upward water circulation, with direction change during the rearing phase. We also studied the interactions between water circulation direction and feeding conditions by (1) shifting the first feeding day (4 occasions, at 8 hours intervals, from 52 to 76 hours after 95% of hatching) and (2) using 2 amounts of preys (which differ by a factor 3). The results show that... |
| Tipo: Text |
Palavras-chave: Turbot; Techniques d'élevage; Alimentation; Turbot; Rearing methods; Feeding. |
| Ano: 1998 |
URL: https://archimer.ifremer.fr/doc/00447/55837/62120.pdf |
| |
|
|
| Gonzalez, Ricardo; Mingant, Christian; Petton, Bruno; Robert, Rene. |
| In contrast with the Japanese oyster Crassostrea gigas and the Manila clam Ruditapes philippinarum, Ostrea edulis seed production in the hatchery has been reported to be erratic, with sudden and unexplained larval and post-metamorphosis mortalities. Fecundity and initial larval quality have been related to broodstock conditioning, but effects on larval development and metamorphosis remain poorly understood. In addition, molluscan larval mortalities have been often associated with bacterial contamination and flow-through techniques may help to overcome this problem. Both aspects have been considered in the present work. O. edulis broodstock were conditioned at 19 °C and fed three different microalgal diets. Two were single-species diets: Rhodomonas salina... |
| Tipo: Text |
Palavras-chave: Ostrea edulis; Feeding; Broodstock conditioning; Larval development; Flow-through. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00090/20093/17732.pdf |
| |
|
|
| Ribeiro,Marinaldo Divino; Pereira,José Carlos; Queiroz,Augusto César de; Bettero,Vitor Pereira; Mantovani,Hilário Cuquetto; Silva,Cássio José da. |
| This study aimed to evaluate the effect of intraruminal infusion of propionic acid (RPA) associated to two (80:20 and 60:40) forage:concentrate ratios (FCR), for young bulls. Four Holstein × Zebu crossbred young bulls with average age of 7 months and 160 kg of body weight (BW) were distributed to a 4 × 4 Latin square design. A total mixed ration, isonitrogenous diets, was ad libitum fed to animals. The propionic acid was obtained by fermentation of reconstituted milk whey by the consortium of bacteria Enterococcus sp. and Veillonella sp.. Daily and along with the supply of solid feeds, 2 L of the compound containing propionic acid were intrainfused in the rumen. There was no RPA × FCR interaction for the intake of nutrients, except for total digestible... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria ruminal; Digestibility; Feeding; Milk whey; Organic acids. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000500023 |
| |
|
|
| Cresoni-Pereira,Carla; Zucoloto,Fernando Sérgio. |
| Using artificial solid diets, experiments were performed with Anastrepha obliqua (Macquart, 1835) wild females in order to verify the influence of different quantities of brewer yeast on the performance and compensation behavior to unbalanced diets ingestion. The observed parameters were egg production, ingestion, diet efficiency and survival in the reproductive phase. Results indicated that there was no compensatory ingestion to different quantities of yeast and that the diet with 12.5g of yeast provided the best performance. The absence of compensatory ingestion is discussed based on the yeast phagostimulation and on the costs involved in solid diets ingestion. The relation between the analyzed parameters and the protein quantities in the diet were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Protein; Feeding; West Indian; Fruit fly. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212001000200007 |
| |
|
|
| Jaime Ceballos, B.; Tamayo Cuellar, L.. |
| Se realizó un ensayo bifactorial de 28 días, en condiciones de laboratorio, con el objetivo de determinar la combinación adecuada entre la tasa de alimentación y el nivel proteico en el alimento, para el cultivo a baja salinidad (2ups) de juveniles de camarón blanco Litopeneaus vannamei (Pérez-Farfante y Kensley, 1997) con peso húmedo promedio inicial de0.06g y 26mm de talla inicial promedio, procedentes de un criadero comercial (“YAGUACAM”; provincia Cienfuegos, Cuba). El nivel proteico y la tasa de alimentación fueron evaluados mediante la combinación de 4 proporciones de proteína (20, 25, 30 y 35%) en el alimento comercial (Api-Camarón®) y tres raciones: baja, media y alta, luego de estimar el (10, 15 y 20% de la biomasa) respectivamente. En... |
| Tipo: Preprint |
Palavras-chave: Feeding. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4513 |
| |
|
| |
|
|
| Canizares,Gil Ignacio Lara; Gonçalves,Heraldo Cesar; Rodrigues,Luciana; Marques,Raquel Ornelas; Komiyama,Claudia Marie; Medeiros,Brenda Batista Lemos; Gomes,Helen Fernanda Barros; Arruda,Guilherme Mendes Machado Franco de. |
| The objective of this experiment was to evaluate levels of replacement (0, 33, 67 and 100%) of corn silage with fresh sugarcane in dairy-goat diets on the ingestive behavior of these animals. Eight lactating Alpine goats (after lactation peak) with a live weight of 51.95±3.29 kg were distributed into two 4 × 4 Latin squares according to their milk production. Animals were placed in individual pens where they received diets ad libitum, twice a day, with a roughage:concentrate ratio of 40:60, during 72 days of experiment. The evaluated variables were time spent feeding (TSF), ruminating (TSR), idle (TSI) and chewing (TSC), dry matter intake (DMI), neutral detergent fiber intake (NDFI), feeding efficiency of dry matter (FEDM) and neutral detergent fiber... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chewing; Feeding; Ruminal bolus; Rumination. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014001200648 |
| |
|
|
| Santos,Rafael Dantas dos; Pereira,Luiz Gustavo Ribeiro; Neves,André Luis Alves; Araújo,Gherman Garcia Leal de; Aragão,Alex Santos Lustosa de; Chizzotti,Mário Luiz. |
| The objective of this study was to evaluate the daily intake and total apparent digestibility of dry matter, organic matter, crude protein, gross energy, ether extract, neutral detergent fiber, acid detergent fiber, total and non-fibrous carbohydrates, total digestible nutrients, energy intake and nitrogen balance of silages of six maize varieties with early or super early cycles recommended to Northeast Brazil. Twenty-four male castrated lambs were lodged in metabolic cages. A completely randomized design with six treatments and four replications was used, with means compared by Tukey test at 5%. There were no differences among varieties for any of the evaluated variables regarding intake and apparent digestibility. Concerning the intake of digestible... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding; Nutrition; Sheep; Ruminants; Supplementation; Zea mays. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200040 |
| |
| Registros recuperados: 233 | |
|
|
|
