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| 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 |
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| 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 |
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| 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 |
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