Studies on the digestive enzymes of the stomachless bonefish Carassius auratus gibelio (bloch): Endopeptidases

Jany, Klaus-Dieter

doi:10.1016/0305-0491(76)90091-2

Cited by 50 publications

(43 citation statements)

References 31 publications

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“…In fact, the pH optimum of the intestinal mucosa trypsin in all fish species was found at high pH values (Yoshinaka et al 1984;García-Carreňo et al 2002;Hau and Benjakul 2006). In most of the fish species, trypsin is unstable at pH below 6.0 (Jany 1976;Pavlisko et al 1997Pavlisko et al , 1999Hau and Benjakul 2006). However the traces of enzyme activity are sometimes observed at pH 4.0 (Pavlisko et al 1997;Hau and Benjakul 2006;Kishimura et al 2008).…”

Section: Discussionmentioning

confidence: 95%

Influence of pH upon the activity of glycosidases and proteinases of intestinal mucosa, chyme and microbiota in fish

Кузьмина

Skvortsova

Zolotareva

et al. 2010

Fish Physiol Biochem

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It is shown that amylolytic and proteolytic activity of the intestinal mucosa, the chyme and the intestinal flora in the fishes, zander Zander lucioperca (L.), perch Perca fluviatilis L., bream Abramis brama (L.) and roach Rutilus rutilus (L.), belonging according to their feeding habits to different ecological groups at the same pH values as well as in the pH range from 5.0 to 10.0 considerably varies. The glycosidase pH optimum of the mucosa and intestinal microbiota is 7.0, whereas that of the chyme varies from 6.0 (in roach) to 8.0 (in bream). pH optimum of the mucosa proteinases in all fish species is 10.0, whereas that of the chyme and the bacterial flora can be observed in all the range of pH values.

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Section: Discussionmentioning

confidence: 95%

Influence of pH upon the activity of glycosidases and proteinases of intestinal mucosa, chyme and microbiota in fish

Кузьмина

Skvortsova

Zolotareva

et al. 2010

Fish Physiol Biochem

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“…Its function in proteinolysis is based both on the action of pepsin and on the acid denaturation of food proteins. Denatured protein is hydrolized much easier by alkaline proteases than is native protein (Jany 1976). Recent research has unequivocally demonstrated the importance of amino acids for the nutritional physiology of larvae (e.g.…”

Section: Discussionmentioning

confidence: 99%

The development of functional digestive and metabolic organs in turbot, Scophthalmus maximus

et al. 1994

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The functional status of organ systems involved into the processing of exogenous food is critical for the survival and growth of fish early life stages. The present study on laboratory-reared larval turbot, ScophthaImus maximus, provides an overview on the ontogeny of structure and functions involved in digestion, absorption and metabolism of nutrients. At start of exogenous feeding the intestine of larval turbot is anatomically differentiated, with enterocytes displaying an adult-type ultrastructure and being able to process lipids. At the microvillous border of the enterocytes, enzymes of contact digestion such as aminopeptidase are found. The ultrastructure of the exocrine pancreatic cells is fully differentiated from hatching onwards. Likewise, substantial activities of trypsintype proteases are present. A stomach anlage exists in firstfeeding larvae; however, the stomach becomes functional (appearance of gastric glands and pepsin secretion) only during metamorphosis. Liver parenchymal cells already display a functional ultrastructure during the endotrophic phase; with onset of exogenous feeding they develop pronounced diet-related changes of their energy stores. Larval respiration is not executed by the gills since respiratory surface of these structures develops only towards metamorphosis. The energy generation of larval muscle tissue depends on aerobic metabolism, whereas glycolytic activCommunicated by O. Kinne, Oldendorf/Luhe H. Segner I (m) 9 W. Kloas

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“…Water temperature and feeding frequency are two important components affecting growth, which have been studied in several fish species such as Channel catfish [38], European seabass [39], rainbow trout [40,41], Tiger Puffer [42], tilapia [24], pikeperch [43], and Asian seabass [44]. Temperature affects food consumption, digestion rate, and growth rate through variations in metabolism [15,45], use of nutrients and energy [18,46], and digestive enzyme activities [17,[47][48][49]. Although optimal temperature and feeding frequency differ in various species, most fish have their specific peaks of maximum food consumption, optimum growth, and preferred range of temperature [50].…”

Section: Optimal Temperature and Feeding Frequencymentioning

confidence: 99%

Effects of temperature and feeding frequency on ingestion and growth for rare minnow

Luo

Wang

2015

Physiology & Behavior

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Studies on the digestive enzymes of the stomachless bonefish Carassius auratus gibelio (bloch): Endopeptidases

Cited by 50 publications

References 31 publications

Influence of pH upon the activity of glycosidases and proteinases of intestinal mucosa, chyme and microbiota in fish

Influence of pH upon the activity of glycosidases and proteinases of intestinal mucosa, chyme and microbiota in fish

The development of functional digestive and metabolic organs in turbot, Scophthalmus maximus

Effects of temperature and feeding frequency on ingestion and growth for rare minnow

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