Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Post-prandial protease activity in the digestive tract of African catfish Clarias gariepinus larvae fed decapsulated cysts of Artemia
Autore:
Garcia-Ortega, A; Verreth, J; Segner, H;
Indirizzi:
Ctr Environm Res Leipzig Halle, Dept Chem Ecotoxicol, D-04301 Leipzig, Germany Ctr Environm Res Leipzig Halle Leipzig Germany D-04301 Leipzig, Germany Wageningen Univ, Wageningen Inst Anim Sci, Fish Culture & Fisheries Grp, NL-6700 AH Wageningen, Netherlands Wageningen Univ Wageningen Netherlands NL-6700 AH ageningen, Netherlands
Titolo Testata:
FISH PHYSIOLOGY AND BIOCHEMISTRY
fascicolo: 3, volume: 22, anno: 2000,
pagine: 237 - 244
SICI:
0920-1742(200004)22:3<237:PPAITD>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
BRINE SHRIMP ARTEMIA; DICENTRARCHUS-LABRAX LARVAE; SEABREAM SPARUS-AURATA; CLUPEA-HARENGUS; BURCHELL LARVAE; ENZYMES; TRYPSIN; BASS; FEED; ASSIMILATION;
Keywords:
digestive enzymes; enzymatic response; feeding; fish larvae; live food; protease; trypsin;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Garcia-Ortega, A CIAD Unidad Mazatlan, Mazatlan 82010, Sinaloa, Mexico CIAD Unidad Mazatlan Mazatlan Sinaloa Mexico 82010 exico
Citazione:
A. Garcia-Ortega et al., "Post-prandial protease activity in the digestive tract of African catfish Clarias gariepinus larvae fed decapsulated cysts of Artemia", FISH PHYS B, 22(3), 2000, pp. 237-244

Abstract

The alkaline proteolytic activity in the gut of African catfish larvae wasstudied during short time ranges from 30 min to 4 h after ingestion of decapsulated Artemia cysts. The variation in total protease and trypsin activities during the day was monitored during starvation, after one single meal ingestion, and during continuous feeding. In starved larvae the enzymatic activity was low and did not change in time. No significant endogenous secretion of digestive enzymes was detected. The level of alkaline proteolytic activity found in starved larvae was further considered as the basal level. In larvae fed only one meal during the day, the enzyme activity significantly increased from 3 h post-feeding up to a maximum level found 12 h after feeding. In the larvae receiving a meal every 4 h, the effect of feeding on the proteolytic activity was significantly different from the one in fish fed only once a day. The total protease activity in this dietary treatment changed according to the time of feeding and fluctuated around a constant level, which was intermediate between the maximum and the basal level. No rhythmic cycle of enzyme production in the fish was observed when the proteolytic activity was studied during a cycle of 24 h. When specific trypsin activity was measured, a similar pattern was found as with the total protease. The contribution of digestive enzymes from Artemia to the total digestion of food by the catfish larvae was calculated to be less than 1% of the totalamount of the proteolytic activity measured in the larval gut.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 05:38:30