Digestive enzymes in 11 freshwater teleost fish species in relation to food habit and niche segregation

Chakrabarti, Ipsit; Gani, Md.A.; Chaki, Korak Kanti; Sur, Runa; Misra, K. K.

doi:10.1016/0300-9629(95)00072-f

Cited by 177 publications

(146 citation statements)

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“…This may be because starch digestion and glucose absorption occurs mainly in the anterior part of the intestine [38]. Highest amylase activity was detected in the lower part of the intestine in Channa striata, middle intestine in Notopterus notopterus and Puntius japonicus, oesophagusin O. niloticus, upper intestine in H. molitrix and C. carpio [33]. Similarly, Papoutsoglou & Lyndon [39] reported higher amylase activity in the posterior intestine, followed by anterior intestine in parrot fish (Sparisomo cretense L).…”

Section: Discussionmentioning

confidence: 98%

“…Different sections of the gut do not necessarily possess the same capacity for the digestion and absorption of a given nutrient. Though many digestive enzymes are restricted to specific sections of digestive tract in contrast with other higher vertebrates [33], amylase in fish is reported to be localised throughout the gastrointestinal tract [34,35]. Amylase is secreted more in the hepatopancreas than in the intestine of carps [36].…”

Section: Discussionmentioning

confidence: 99%

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Digestive Enzyme Activities in Different Size Groups and Segments of the Digestive Tract in Labeo Rohita (Day, 1878)

Umalatha¹,

Nimmagadda²,

Jp³

et al. 2016

JAMB

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Digestive Enzyme Activities in Different Size Groups and Segments of the Digestive Tract in Labeo Rohita (Day, 1878)

Umalatha¹,

Nimmagadda²,

Jp³

et al. 2016

JAMB

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“…Polysiphonia made up the largest part, 29% of the identifiable material, but this value is likely an underestimate, because the cell wall of this alga is susceptible to gastric acid, and therefore the cell contents are easily accessed by enzymes such as α-Amylase and protenase that are active in the stomachs (Chakrabarti et al 1995), and digested rapidly (Zemke-White et al 2000;Hata and Kato 2002). Conversely, corticated algae, Gelidiella sp.…”

Section: Discussionmentioning

confidence: 99%

Food habits of the farmer damselfishStegastes nigricansinferred by stomach content, stable isotope, and fatty acid composition analyses

Hata

Umezawa

2011

Ecological Research

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This content has not been published or submitted for publication elsewhere in any language, and all authors have contributed significantly, and are in agreement with the content of the manuscript. 2 AbstractThe territorial damselfish, Stegastes nigricans, maintains algal farms by excluding invading herbivores and weeding unpalatable algae from its territories. In Okinawa, Japan, S. nigricans farms are exclusively dominated by Polysiphonia sp., a highly digestible filamentous rhodophyte. This study was aimed at determining the diet of S.nigricans in Okinawa and its dependency on these almost-monoculture algal farms based on stomach contents and chemical analyses. Stomach content analyses revealed that all available food items in the algal farms (i.e., algae, benthic animal inhabitants, trapped detritus) were contained in fish stomachs, but amorphous organic matter accounted for 68% of the contents. Therefore, carbon and nitrogen stable isotope ratios and fatty acid (FA) compositions were analyzed to trace items actually assimilated in their bodies. Stable isotope analyses showed that benthic animals were an important food source even for this farmer fish. Two essential FAs (EFA), 20:4n6 and 20:5n3, which are produced only by rhodophytes among available food items, were rich in the muscle tissue of S. nigricans as well as in algal mats and detritus, suggesting that algal mats contribute EFAs to S. nigricans directly and indirectly through the food web. In conclusion, S. nigricans ingested algal mats, detritus and benthic animals maintained within its farm. Algae and detritus were original sources of EFAs, and benthic animals, which were much more abundant in the farms than in outside territories, provided a nitrogen-rich dietary source for the fish.

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“…In the present study, experiments were conducted in two reservoirs (oligotrophic versus eutrophic). The activities of digestive peptidases and β-glucosidase were assayed, since these enzymes could be affected by the feeding habits and by ecological conditions (Chakrabarti 1995;Kuz'mina et al 1996Kuz'mina et al , 2003. P. maculatus is an omnivorous species with tendency to carnivory (Duarte el al.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, before specific comparisons between the two reservoirs, one must point out that these hydrolases are promising biomarker for future studies given the acceptable low intraspecific variations and the easy assaying of their activities with chromogenic or natural substrates. Chakrabarti et al (1995) investigated the enzymatic activities (alpha-amylase, cellulase, invertase, esterase, acidic and alkaline peptidases) of eleven teleostean fishes and found that the activities were higher in the intestine than in the stomach or in the liver, independently of the feeding habit. Difficulty in finding clear biochemical indicators of feeding habits made it even more difficult to compare among the individuals from different environments, such as oligotrophic and eutrophic ones.…”

Section: Discussionmentioning

confidence: 99%

Enzymatic Activity in the Gastrointestinal Tract of Pimelodus maculatus (Teleostei, Siluriformes) in Two Neotropical Reservoirs with Different Trophic Conditions

Duarte

Bemquerer

Araújo

2015

Braz. arch. biol. technol.

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Enzymatic activities for digestion of proteins and carbohydrates were compared among three organs of the digestive system of Pimelodus maculatus in two reservoirs with different trophic conditions during the winter of 2006. The aim was to test the hypothesis that enzymatic activity for the digestion of proteins and carbohydrates differed among organs and that such activities differ between the trophic state of the environment. Enzymatic activities were determined through the assays of specificity for trypsin, chymotrypsin and β-glucosidase enzymes. The intestine had higher trypsin-like enzymatic activities compared to the stomach and liver. The highest β-glucosidase activity was found in the liver compared to the stomach and intestine in the oligotrophic reservoir only. Overall, enzymatic activity did not differ between the eutrophic and oligotrophic reservoirs, although the intestinal chymotrypsin was comparatively higher in the eutrophic reservoir and the hepatic β-glucosidase was higher in the oligotrophicreservoir. These findings indicated that most digestive activity occurred in the intestine for P. maculatus, which was probably related to its omnivorous/carnivorous feeding habits. The highest proteolytic activity in the intestine was expected for most fishes, but the high hepatic β-glucosidase in the oligotrophic reservoir was unexpected. The hepatic β-glucosidase as well as the intestinal chymotrypsin-like activity could be considered as the candidates for biomarkers of environmental quality.

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Digestive enzymes in 11 freshwater teleost fish species in relation to food habit and niche segregation

Cited by 177 publications

References 11 publications

Digestive Enzyme Activities in Different Size Groups and Segments of the Digestive Tract in Labeo Rohita (Day, 1878)

Digestive Enzyme Activities in Different Size Groups and Segments of the Digestive Tract in Labeo Rohita (Day, 1878)

Food habits of the farmer damselfishStegastes nigricansinferred by stomach content, stable isotope, and fatty acid composition analyses

Enzymatic Activity in the Gastrointestinal Tract of Pimelodus maculatus (Teleostei, Siluriformes) in Two Neotropical Reservoirs with Different Trophic Conditions

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