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Keywords: digestion
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Journal Articles
J Exp Biol (2019) 222 (14): jeb190470.
Published: 15 July 2019
...Chris N. Glover; Alyssa M. Weinrauch ABSTRACT The hagfishes provide valuable insight into the physiology of feeding, digestion and nutrient absorption by virtue of unusual and unique features of their biology. For example, members of this group undergo long periods of fasting, and are the only...
Journal Articles
J Exp Biol (2019) 222 (7): jeb187484.
Published: 1 April 2019
... in enzyme activity supported. Digestion Gastrointestinal tract Ionoregulation Ion-poor water Metabolic enzymes Blind-ended digitations known as caeca are associated with the gastrointestinal tract of slightly more than half of known fish species ( Hossain and Dutta, 1996...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (7): jeb201079.
Published: 1 April 2019
... needed for gastric acid secretion during digestion. This hypothesis is partially based on the unique crocodilian vascular anatomy where a left aorta (LAo) arises from the right ventricle, and appears to preferentially supply the gastrointestinal system, whereas the right aorta emerges from the left...
Journal Articles
J Exp Biol (2017) 220 (19): 3565–3570.
Published: 1 October 2017
...Harvey B. Lillywhite ABSTRACT An important question related to the survival of dehydrating animals is whether feeding provides a net gain of water – contributing postprandial free water and metabolic water – or, alternatively, whether digestion and assimilation of ingested food incur a net loss...
Journal Articles
J Exp Biol (2017) 220 (18): 3355–3362.
Published: 15 September 2017
... blood digestion. Only ingested proteins were able to trigger this abrupt increase in abdominal pH. The ingestion of amino acids, even at high concentrations, did not induce alkalinisation. During blood digestion, the thoracic midgut remains acidic, becoming a suitable compartment for carbohydrate...
Journal Articles
J Exp Biol (2016) 219 (13): 1969–1973.
Published: 1 July 2016
...Michael W. Butler; Thomas J. Lutz; H. Bobby Fokidis; Zachary R. Stahlschmidt ABSTRACT While eating has substantial benefits in terms of both nutrient and energy acquisition, there are physiological costs associated with digesting and metabolizing a meal. Frequently, these costs have been documented...
Journal Articles
J Exp Biol (2016) 219 (12): 1903–1912.
Published: 15 June 2016
... material. It has been hypothesized that physiological or microbial limitations may constrain the evolution of herbivory in lizards. Herbivorous lizards exhibit adaptations in digestive morphology and function that allow them to better assimilate plant material. However, it is unknown whether these traits...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (22): 3570–3579.
Published: 1 November 2015
...Alexander G. S. Jackson; Szu-Yun Leu; Neil B. Ford; James W. Hicks ABSTRACT Snakes exhibit large factorial increments in oxygen consumption during digestion and physical activity, and long-lasting sub-maximal increments during reproduction. Under natural conditions, all three physiological states...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (21): 3425–3434.
Published: 1 November 2015
... microbiome. Using six western grey kangaroos ( Macropus fuliginosus ) and four red kangaroos ( Macropus rufus ), we measured daily absolute CH 4 production in vivo as well as CH 4 yield (CH 4 per unit of intake of dry matter, gross energy or digestible fibre) by open-circuit respirometry. Two food intake...
Journal Articles
J Exp Biol (2015) 218 (17): 2666–2669.
Published: 1 September 2015
... 22 6 2015 © 2015. Published by The Company of Biologists Ltd 2015 Summary: The capacity of birds to hydrolyze glucosides and release toxins conjugated to sugars, which was uncertain, is shown to be low compared with that of rodents. Cytosolic β-glucosidase Digestion Enzyme...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (22): 3958–3961.
Published: 15 November 2014
... of temperature from 30 to 40°C in the snake Python regius . of fasting snakes increased exponentially with temperature whereas of digesting snakes at high temperatures plateaued at a level 3- to 4-fold above fasting. The high and sustained aerobic metabolism over the entire temperature range was supported...
Journal Articles
In collection:
Cardiology articles
J Exp Biol (2014) 217 (10): 1784–1789.
Published: 15 May 2014
... response to digestion, though the triggers of this response are unknown. Here, we hypothesized that an O 2 supply–demand mismatch stimulates postprandial cardiac enlargement in Burmese pythons. To test this hypothesis, we rendered animals anemic prior to feeding, essentially halving blood oxygen content...
Journal Articles
J Exp Biol (2013) 216 (17): 3350–3357.
Published: 1 September 2013
... (NPV) increased both consumption and excretion, but reduced growth rate and conversion efficiency of ingested and digested food in larvae of a noctuid moth, Spodoptera litura . While the effects of DCV infection on the mass of flies in the present study have some similarities to pathologies described...
Journal Articles
J Exp Biol (2013) 216 (2): 329–337.
Published: 15 January 2013
... digestive efficiency as locusts in which the GIT was not enlarged. Thus, plasticity of the GIT did not improve nutritional homeostasis, but increased the rate of nutrient uptake. * Author for correspondence ( fiona.clissold@sydney.edu.au ) † Present address: Laboratory of Protein Synthesis...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (19): 3394–3402.
Published: 1 October 2012
... local midgut contraction, thus decreasing metabolic activity and increasing the time the food bolus remains in this region, allowing increased time for chemical digestion and the absorption of nutrients. This is in line with the suggestion that these peptides function as neurotransmitters...
Journal Articles
J Exp Biol (2012) 215 (11): 1965–1974.
Published: 1 June 2012
... of animals, while behaviour determines which environments are encountered. Here, we identified changes in the behavioural selection of external salinity in Fundulus heteroclitus , an estuarine teleost, as a consequence of digesting a meal. Fish that consumed high levels of dietary calcium exhibited a higher...
Journal Articles
J Exp Biol (2012) 215 (9): 1435–1441.
Published: 1 May 2012
... ); and an insectivorous bat, Kuhl’s pipistrelle ( Pipistrellus kuhlii ). Because these fleas are not known to occur on bats, we hypothesized that the fleas’ feeding performance (i.e. feeding and digestion rates) would be higher when feeding on their natural host than on either of the bats that they do not naturally...
Journal Articles
J Exp Biol (2012) 215 (8): 1259–1265.
Published: 15 April 2012
... investigated the feeding and energy expenditure for digestion in two flea species Parapulex chephrenis and Xenopsylla ramesis on a principal host ( Acomys cahirinus and Meriones crassus , respectively) and eight auxiliary host species. We predicted that fleas would perform better – that is (i) a higher...
Journal Articles
J Exp Biol (2012) 215 (1): 185–196.
Published: 1 January 2012
... are stimulated with feeding. In contrast, fasted water snakes secreted gastric acid and intestinal base at rates similar to those of digesting snakes. We observed no difference between fasted and fed individuals for either species in gastric or intestinal transepithelial potential and conductance...
Journal Articles
J Exp Biol (2010) 213 (17): 2950–2957.
Published: 1 September 2010
... and a β-glucosidase. * Author for correspondence ( balla@deakin.edu.au ) 17 5 2010 © 2010. 2010 Crustacea Gecarcoidea natalis digestion cellulose glucohydrolase Herbivorous terrestrial crustaceans, such as gecarcinid land crabs, consume a wide range of plant material...