Consulta: subjectFacets:"Intestinal enzymes"
Registros recuperados: 5
Data/hora: 03/06/2024 18:32:15

Substitution of live food by formulated diets in marine fish larvae
Provedor de dados: 5
Autores: Cahu, Chantal; Zambonino, Jose-luis.
Until recently, it was considered impossible to feed newly hatched marine fish species with a compound diet. Substituting a compound diet for live prey was performed several weeks after hatching, depending on the species. Compound diets were well ingested at the early stage but larvae died with a gut full of food, suggesting that larvae were unable to digest the compound diet. The hypothesis was that younger larvae have insufficient digestive enzymes to thrive on compound diets, and that exogenous enzymes, provided from live prey, are necessary for early stages.The organogenesis of marine fish larvae is not completely achieved at hatching and histological studies have revealed that the anatomy of the digestive tract undergoes developmental changes over...
Tipo: Text
Palavras-chave: Protein; Phospholipid; Pancreatic enzymes; Microparticulate diet; Intestinal enzymes; Protein hydrolysate; Gut maturation; Fish larvae.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-447.pdf

Ontogeny of the gastrointestinal tract of marine fish larvae
Provedor de dados: 5
Autores: Zambonino, Jose-luis; Cahu, Chantal.
Marine fish larvae undergo major morphological and cellular changes during the first month of life. The ontogeny of the gastrointestinal tract combines these two aspects of the larval development and is very interesting in that the timing of functional changes appears genetically hard-wired. The goal of this paper is to give an overview of the gastrointestinal development process in marine fish larvae, with particular attention to three species: sea bass; red drum; and sole, since the description of gut maturation in fish larvae was initiated during the last decade with these species. During the early stages, marine fish larvae exhibit particular digestive features. Concerning the exocrine pancreas, amylase expression decreases with age from the third week...
Tipo: Text
Palavras-chave: Proteins; Pancreatic enzymes; Lipids; Larvae feeds; Intestinal enzymes; Glucides; Fish larvae; Enzyme expression; Digestion; Development; Aquaculture.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-650.pdf

Ontogeny of the digestive tract of thick lipped grey mullet (Chelon labrosus) larvae reared in "mesocosms"
Provedor de dados: 5
Autores: Zouiten, Dora; Ben Khemis, I; Besbes, R; Cahu, Chantal.
This work describes the ontogeny of the digestive tract in thick lipped grey mullet (Chelon labrosus) larvae reared until day 36 post-hatching with the semi-extensive technology in mesocosms. Diet was constituted by live preys, rotifers, Arternia and wild zooplankton, then compound diet was added from day 20 (p. h.). Linear growth, weight growth and digestive enzymes specific activities were studied during larval ontogeny. Pancreatic enzymes (trypsin and amylase) and intestinal enzymes (leucine-alanine peptidase "Leu-ala", aminopeptidase N "AN" and alkaline phosphatase "AP") were assayed in larvae sampled throughout the rearing trial to evaluate gastrointestinal maturation along the development.   The trypsin specific activities were very high during the...
Tipo: Text
Palavras-chave: Pancreatic enzymes; Intestinal enzymes; Fish larvae; Mesocosm; Chelan labrosus.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4585.pdf

Feral pigeons in urban environments: dietary flexibility and enzymatic digestion?
Provedor de dados: 97
Autores: CIMINARI,MARÍA EUGENIA; DEL VALLE MOYANO,GRACIELA; CHEDIACK,JUAN GABRIEL; CAVIEDES-VIDAL,ENRIQUE.
Columba livia, original from Europe, is at present widely distributed all over the world. These granivores colonized urban environments where the availability of crops and seeds is not always permanent and, for that are forced to exploit other resources with different composition, e.g. high protein foodstuff. Thus, feral pigeons should have the ability to survive on a diet rich in protein as they do with starchy items by having an adequate digestive biochemical machinery to process it. Phylogenetical and functional hypothesis has been proposed linking dietary flexibility and enzyme lability. All Passeriformes studied to date show the expected positive correlation between aminopeptidase-N and dietary protein but not for intestinal carbohydrases. Conversely,...
Tipo: Journal article
Palavras-chave: Feral pigeons; Dietary flexibility; Digestive plasticity; Intestinal enzymes; Pancreatic enzymes.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200011

Are levels of digestive enzyme activity related to the natural diet in passerine birds?
Provedor de dados: 48
Autores: Ramírez-Otárola,Natalia; Sabat,Pablo.
Digestive capabilities, such as the rates nutrient hydrolysis and absorption, may affect energy intake and ultimately feeding behavior. In birds, a high diversity in gut biochemical capabilities seems to support the existence of a correlation between the morphology and physiology of the intestinal tract and chemical features of the natural diet. However, studies correlating the activity of digestive enzymes and the feeding habits at an evolutionary scale are scarce. We investigated the effect of dietary habits on the digestive physiological characteristics of eight species of passerine birds from Central Chile. The Order Passeriformes is a speciose group with a broad dietary spectrum that includes omnivorous, granivorous and insectivorous species. We...
Tipo: Journal article
Palavras-chave: Birds; Diet; Intestinal enzymes; Passeriformes; Food habits; Adaptation.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000100011