| Title |
Physiological responses to short-term fasting among herbivorous, omnivorous, and carnivorous fishes
|
|---|---|
| Published in |
Journal of Comparative Physiology B, March 2014
|
| DOI | 10.1007/s00360-014-0813-4 |
| Pubmed ID | |
| Authors |
Ryan D. Day, Ian R. Tibbetts, Stephen M. Secor |
| Abstract |
We explored the integrated role of dietary specialization and feeding periodicity on the response of the gastrointestinal tract of teleosts fishes to short-term (7-10 days) fasting and refeeding. Fasted and fed herbivorous grass carp (Ctenopharyngodon idella), omnivorous channel catfish (Ictalurus punctatus), and carnivorous largemouth bass (Micropterus salmoides) were compared for digestive organ masses, intestinal morphology, gastrointestinal pH, and the specific activities and total intestinal capacities of the intestinal hydrolases aminopeptidase (APN) and maltase and intestinal nutrient transporters. All three species experience intestinal hypertrophy with feeding as noted by significant increases in enterocyte dimensions. Of the three, only I. punctatus experienced a postprandial increase in intestinal length, and only C. idella experienced significant modulation of intestinal microvillus length. Feeding resulted in acidification of the stomachs of I. punctatus and M. salmoides. Predicted to exhibit a relatively modest set of postprandial responses because of their more frequent feeding habits, C. idella only experienced increases in APN and maltase activity with feeding and no significant regulation of nutrient uptake. Significant regulation of hydrolase activities and nutrient uptake were exhibited by I. punctatus and M. salmoides, with I. punctatus experiencing the most comprehensive set of responses. As predicted by food habits, there was an interspecific gradient in intestinal length and glucose uptake extending from longer intestines and greater glucose uptake for the herbivorous C. idella, intermediate lengths and glucose uptake for the omnivorous I. punctatus, and shorter intestines and reduced glucose uptake for the carnivorous M. salmoides. Among teleosts fishes, short episodes of fasting lead to significant alterations in intestinal form and function that are rapidly restored with feeding. |
X Demographics
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Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Scientists | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 74 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 74 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 15 | 20% |
| Student > Master | 12 | 16% |
| Student > Ph. D. Student | 9 | 12% |
| Student > Bachelor | 7 | 9% |
| Student > Doctoral Student | 7 | 9% |
| Other | 8 | 11% |
| Unknown | 16 | 22% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 36 | 49% |
| Biochemistry, Genetics and Molecular Biology | 8 | 11% |
| Environmental Science | 2 | 3% |
| Immunology and Microbiology | 2 | 3% |
| Engineering | 2 | 3% |
| Other | 5 | 7% |
| Unknown | 19 | 26% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 11 March 2014.
All research outputs
#19,854,405
of 24,395,432 outputs
Outputs from Journal of Comparative Physiology B
#648
of 840 outputs
Outputs of similar age
#166,242
of 225,915 outputs
Outputs of similar age from Journal of Comparative Physiology B
#4
of 7 outputs
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