Feeding behavior under predatory risk in Ctenomys talarum: nutritional state and recent experience of a predatory event

2018 ◽  
Vol 64 (2) ◽  
pp. 261-269 ◽  
Author(s):  
Valentina Brachetta ◽  
Cristian E. Schleich ◽  
Roxana R. Zenuto
Keyword(s):  
Feeding Behavior ◽  
Nutritional State ◽  
Recent Experience ◽  
Ctenomys Talarum

Mechanisms of Nutritional Regulation

2012 ◽  
Author(s):  
Stephen J. Simpson ◽  
David Raubenheimer
Keyword(s):  
Feeding Behavior ◽  
Nutrient Intake ◽  
Neural Circuits ◽  
Food Composition ◽  
Nutritional State ◽  
Nutritional Requirements ◽  
Taste Receptors ◽  
Nutritional Regulation ◽  
Limited Supply

This chapter focuses on how animals are able to regulate their intake and use of multiple nutrients. To regulate the balance of nutrients eaten, an animal needs to assess the composition of available foods in relation to its nutritional requirements. Integration of information about food composition and nutritional state occurs both at the periphery, by nutrient-specific modulation of taste receptors, and more centrally as signals from systemic and peripheral sources converge onto the neural circuits that control feeding behavior. Meanwhile, postingestive regulatory responses can assist in rebalancing an imbalanced nutrient intake. Once digested and absorbed across the gut, nutrient supplies can be further rebalanced by differentially voiding excess nutrients and conserving nutrients that are in limited supply.

scholarly journals A role for the locus coeruleus in the modulation of feeding

2019 ◽  
Author(s):  
Natale R. Sciolino ◽  
Christopher M. Mazzone ◽  
Nicholas W. Plummer ◽  
Irina Evsyukova ◽  
Jaisal Amin ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Locus Coeruleus ◽  
Lateral Hypothalamus ◽  
Nutritional State ◽  
Causal Role ◽  
Noradrenergic Neurons ◽  
Direct Activation ◽  
Endogenous Activity ◽  
Emotion Memory

SUMMARYNoradrenergic neurons of the locus coeruleus (LC-NE) are known to play an important role in arousal, emotion, memory and cognition. In the present study, we use fiber photometry combined with chemogenetic and optogenetic approaches to demonstrate a previously unrecognized role for LC-NE neurons in the modulation of feeding. We show that endogenous activity of LC-NE neurons is enhanced while approaching food and suppressed during feeding. These changes in LC activity during feeding behavior are attenuated as mice approach satiety, demonstrating that nutritional state modulates LC responses to food. Direct activation of LC-NE neurons results in the suppression of feeding. Further, activation of an LC projection to the lateral hypothalamus also suppresses feeding. Together, these findings demonstrate a direct causal role for LC-NE activity in the modulation of feeding.

Regulation of feeding behavior in adult Drosophila melanogaster varies with feeding regime and nutritional state.

1994 ◽  
Vol 197 (1) ◽  
pp. 215-235 ◽  
Author(s):  
R S Edgecomb ◽  
C E Harth ◽  
A M Schneiderman
Keyword(s):  
Drosophila Melanogaster ◽  
Feeding Behavior ◽  
Nutritional State ◽  
Food Storage ◽  
Crop Size ◽  
Feeding Regime ◽  
Single Meal ◽  
Ad Libitum ◽  
Adult Drosophila ◽  
Over Time

The regulation of feeding behavior in adult Drosophila melanogaster includes such elements as ingestion responsiveness, volume ingested in a single meal, food storage in the crop and rate of defecation. Our results suggest that feeding behavior varies in a manner dependent on feeding regime (food-deprived or ad-libitum-fed) and nutritional state. Fed flies that are subsequently food-deprived become increasingly more responsive to food stimuli over time and, when offered 1% agar diets containing different concentrations of sucrose, ingest greater amounts of diets that have higher sucrose concentrations. When fed ad libitum for 72 h on these same diets, D. melanogaster maintained much smaller crops on average than food-deprived flies fed a single meal. Additionally, ad-libitum-fed flies are grouped into two categories depending on the concentration of sucrose in the diet. Flies fed for 72 h on 1% agar diets having 50 mmoll-1 sucrose or more are not affected by the concentration of sucrose in the diet, while flies fed on diets of 15 or 25 mmoll-1 sucrose increase ingestion responsiveness, crop size and the rate of defecation with decreasing concentrations of sucrose in the diet. Flies fed on even lower sucrose concentrations (5 or 10 mmoll-1 sucrose) for 27-72 h exhibit both a shift over time to larger crop sizes and increased mortality over those of flies fed 15 mmoll-1 sucrose. These data suggest that flies fed ad libitum are capable of modulating their feeding behavior in response to their nutritional state.

scholarly journals Cholecystokinin-like peptide mediates satiety by inhibiting sugar attraction

PLoS Genetics ◽  
2021 ◽  
Vol 17 (8) ◽  
pp. e1009724
Author(s):  
Di Guo ◽  
Yi-Jie Zhang ◽  
Su Zhang ◽  
Jian Li ◽  
Chao Guo ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Molecular Mechanisms ◽  
Receptor Gene ◽  
Brown Planthopper ◽  
Nutritional State ◽  
State Dependent ◽  
Internal States ◽  
Survival And Reproduction ◽  
Underlying Mechanisms ◽  
External Stimuli

Feeding is essential for animal survival and reproduction and is regulated by both internal states and external stimuli. However, little is known about how internal states influence the perception of external sensory cues that regulate feeding behavior. Here, we investigated the neuronal and molecular mechanisms behind nutritional state-mediated regulation of gustatory perception in control of feeding behavior in the brown planthopper and Drosophila. We found that feeding increases the expression of the cholecystokinin-like peptide, sulfakinin (SK), and the activity of a set of SK-expressing neurons. Starvation elevates the transcription of the sugar receptor Gr64f and SK negatively regulates the expression of Gr64f in both insects. Interestingly, we found that one of the two known SK receptors, CCKLR-17D3, is expressed by some of Gr64f-expressing neurons in the proboscis and proleg tarsi. Thus, we have identified SK as a neuropeptide signal in a neuronal circuitry that responds to food intake, and regulates feeding behavior by diminishing gustatory receptor gene expression and activity of sweet sensing GRNs. Our findings demonstrate one nutritional state-dependent pathway that modulates sweet perception and thereby feeding behavior, but our experiments cannot exclude further parallel pathways. Importantly, we show that the underlying mechanisms are conserved in the two distantly related insect species.

scholarly journals Cholecystokinin-like Peptide Mediates Satiety by Inhibiting Sugar Attraction

2020 ◽  
Author(s):  
Di Guo ◽  
Yi-jie Zhang ◽  
Su Zhang ◽  
Jian Li ◽  
Chao Guo ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Molecular Mechanisms ◽  
Direct Action ◽  
Brown Planthopper ◽  
Nutritional State ◽  
Animal Survival ◽  
Internal States ◽  
Survival And Reproduction ◽  
Gustatory Perception ◽  
External Stimuli

Feeding is essential for animal survival and reproduction and is regulated by both internal states and external stimuli. However, little is known about how internal states influence the perception of external sensory cues that regulate feeding behavior. Here, we investigated the neuronal and molecular mechanisms behind nutritional state-mediated regulation of gustatory perception in control of feeding behavior in the brown planthopper and Drosophila. We found that feeding increases the expression of the cholecystokinin-like peptide, sulfakinin (SK), and the activity of a set of SK-expressing neurons. Starvation elevates the transcription of the sugar receptor Gr64f and SK negatively regulates the expression of Gr64f in both insects. This Gr64f regulation is by direct action of SK neurons on Gr64f-expressing neurons of the proboscis and proleg tarsi that co-express the SK receptor CCKLR-17D3. Our findings thus demonstrate how nutritional state induces peptide signaling to modulate sweet perception and thereby feeding behavior.

Is Anchorage the Capital of Alaska: Catching Errors With Recent Experience vs. One's Own Knowledge

2014 ◽  
Author(s):  
Kathleen Arnold ◽  
Sharda Umanath ◽  
Elizabeth Marsh
Keyword(s):  
Recent Experience

The effect of recent experience on dialect normalization

1997 ◽  
Author(s):  
Barbara A. Church ◽  
Robert Martin ◽  
Susan Garnsey
Keyword(s):  
Recent Experience

Neonatal nutritional strategy of a viviparous elasmobranch with extremely low reproductive output

2020 ◽  
Vol 638 ◽  
pp. 107-121 ◽  
Author(s):  
BS Rangel ◽  
NE Hussey ◽  
Y Niella ◽  
LA Martinelli ◽  
AD Gomes ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Reproductive Strategies ◽  
Trophic Ecology ◽  
Essential Fatty Acids ◽  
Physiological State ◽  
Maternal Investment ◽  
Early Life History ◽  
Nutritional State ◽  
Disc Width ◽  
Biomarker Analysis

Throughout evolutionary history, elasmobranchs have developed diverse reproductive strategies. Little focused work, however, has addressed how neonatal nutritional state is affected by differing degrees of maternal investment associated with these markedly different reproductive strategies. To investigate the effect of maternal investment on the nutritional quality of pups during the early life history of an extremely viviparous elasmobranch, quantitative biomarker analysis including lipids, fatty acids and stable isotopes was conducted. Using the cownose ray Rhinoptera bonasus (histotrophic viviparous) as a model, we found that pups were initially born in a positive nutritional state, enriched in physiologically important essential fatty acids and nitrogen and carbon stable isotope values (δ15N and δ13C), a result of maternal intrauterine transfer. A systematic decrease in some fatty acids and δ15N values, as well as a decrease in cholesterol with growth, confirmed that these substrates were derived from maternal resources and used in initial metabolic processes following birth. An observed increase in condition factor, plasma essential fatty acids and triglyceride:cholesterol ratio with increasing body size identified a progression towards successful independent foraging with pups not displaying marked nutritional deficiency or fasting phases. Our multi-tracer approach allowed the identification of 2 size classes of young rays (<50 and <70 cm disc width) that displayed distinct physiological states. Since prenatal maternal investment is critical for offspring condition and to promote successful foraging post birth, understanding the trophic ecology and physiological state of pups during their first year is critical to guide management and conservation within nursery grounds.

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