scholarly journals Failure to Find Altruistic Food Sharing in Rats

2021 ◽  
Vol 12 ◽  
Author(s):  
Haoran Wan ◽  
Cyrus Kirkman ◽  
Greg Jensen ◽  
Timothy D. Hackenberg
Keyword(s):  
Food Production ◽  
Food Access ◽  
Food Restriction ◽  
Food Motivation ◽  
Size Number ◽  
Production And Consumption ◽  
Food Size ◽  
Low Levels ◽  
Access To Food ◽  
Different Levels

Prior research has found that one rat will release a second rat from a restraint in the presence of food, thereby allowing that second rat access to food. Such behavior, clearly beneficial to the second rat and costly to the first, has been interpreted as altruistic. Because clear demonstrations of altruism in rats are rare, such findings deserve a careful look. The present study aimed to replicate this finding, but with more systematic methods to examine whether, and under what conditions, a rat might share food with its cagemate partner. Rats were given repeated choices between high-valued food (sucrose pellets) and 30-s social access to a familiar rat, with the (a) food size (number of food pellets per response), and (b) food motivation (extra-session access to food) varied across conditions. Rats responded consistently for both food and social interaction, but at different levels and with different sensitivity to the food-access manipulations. Food production and consumption was high when food motivation was also high (food restriction) but substantially lower when food motivation was low (unlimited food access). Social release occurred at moderate levels, unaffected by the food-based manipulations. When food was abundant and food motivation low, the rats chose food and social options about equally often, but sharing (food left unconsumed prior to social release) occurred at low levels across sessions and conditions. Even under conditions of low food motivation, sharing occurred on only 1% of the sharing opportunities. The results are therefore inconsistent with claims in the literature that rats are altruistically motivated to share food with other rats.

scholarly journals Failure to Find Altruistic Food Sharing in Rats

2020 ◽  
Author(s):  
Haoran Wan ◽  
Cyrus Kirkman ◽  
Greg Jensen ◽  
Timothy D Hackenberg
Keyword(s):  
Food Production ◽  
Food Access ◽  
Food Restriction ◽  
Food Motivation ◽  
Size Number ◽  
Production And Consumption ◽  
Food Size ◽  
Low Levels ◽  
Access To Food ◽  
Different Levels

Prior research has found that one rat will release a second rat from restraint in the presence of food, thereby allowing that second rat access to food. Such behavior, clearly beneficial to the second rat and costly to the first, has been interpreted as altruistic. Because clear demonstrations of altruism in rats are rare, such findings deserve a careful look. The present study aimed to replicate this finding, but with more systematic methods to examine whether, and under what conditions, a rat might share food with its cagemate partner. Rats were given repeated choices between high-valued food (sucrose pellets) and 30-s social access to a familiar rat, with the (a) food size (number of food pellets per response), and (b) food motivation (extra-session access to food) varied across conditions. Rats responded consistently for both food and social interaction, but at different levels and with different sensitivity to the food-access manipulations. Food production and consumption was high when food motivation was also high (food restriction) but substantially lower when food motivation was low (unlimited food access). Social release occurred at moderate levels, unaffected by the food-based manipulations. When food was abundant and food motivation low, the rats chose food and social options about equally often, but sharing (food left unconsumed prior to social release) occurred at low levels across sessions and conditions. Even under conditions of low food motivation, sharing occurred on only 1% of the sharing opportunities. The results are therefore inconsistent with claims in the literature that rats are altruistically motivated to share food with other rats.

scholarly journals Análisis de indicadores de disponibilidad y accesibilidad alimentaria en el municipio de Xalapa

UVserva ◽  
2019 ◽  
Author(s):  
Luis Felipe Godínez García ◽  
Lol Ki Itzel López Galindo ◽  
María Magdalena Álvarez Ramírez
Keyword(s):  
Food Security ◽  
Food Production ◽  
Food Access ◽  
The Other ◽  
Social Programs ◽  
Nutritional Security ◽  
Active Population ◽  
Para Determinar ◽  
Food And Nutritional Security ◽  
Access To Food

Para determinar la situación de Seguridad Alimentaria y Nutricional del municipio de Xalapa, Veracruz, se analizaron los pilares de la disponibilidad y accesibilidad a los alimentos; los indicadores incluidos fueron: producción de alimentos básicos, programas sociales, pobreza y carencias, desempleo, población económicamente activa e ingreso. De los 22 indicadores analizados, 13 presentan datos que indican una tendencia hacia la inseguridad alimentaria, mientras que 7 muestran valores de seguridad alimentaria. La producción de alimentos mostró una disminución, mientras que en los programas sociales se muestran como fortaleza, los indicadores de pobreza y desempleo muestran tendencia al aumento, al igual que la carencia por acceso a la alimentación. Al considerar que con uno de los cuatro pilares no se encuentre al 100% se considera un estado de inseguridad, es necesario examinar los indicadores de la SAN como un referente para establecer un diagnóstico por municipio.Palabras clave: seguridad alimentaria; municipio; indicador; pobreza; desnutrición AbstractThe Food and Nutritional Security: Food availability and Food access were analyzed to determine the situation of the municipality of Xalapa, Veracruz. The indicators worked were basic food production, social programs, poverty and shortages, unemployment, economically active population, income. The food production shows a decrease, while in social programs a strength is shown, poverty and unemployment indicators show a tendency to increase, as well as the lack of access to food. In total of the 22 indicators analyzed, 13 present data indicating a trend towards food insecurity, while 7 show food safety values. It is necessary to analyze the indicators of the other pillars of the SAN to establish a better diagnosis of the municipality.Keywords: Food Security; Municipality; Indicator; Poverty; Malnutrition

scholarly journals Changes in Microbiota and Bacterial Protein Caseinolytic Peptidase B During Food Restriction in Mice: Relevance for the Onset and Perpetuation of Anorexia Nervosa

Nutrients ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2514 ◽  
Author(s):  
Manon Dominique ◽  
Romain Legrand ◽  
Marie Galmiche ◽  
Saïda Azhar ◽  
Camille Deroissart ◽  
...  
Keyword(s):  
Anorexia Nervosa ◽  
Plasma Concentration ◽  
Associated Factors ◽  
Food Access ◽  
Food Restriction ◽  
Bacterial Protein ◽  
Limited Food ◽  
Access To Food ◽  
Colonic Content

Microbiota contributes to the regulation of eating behavior and might be implicated in the pathophysiology of anorexia nervosa. ClpB (Caseinolytic peptidase B) protein produced mainly by the Enterobacteriaceae family has been identified as a conformational mimetic of α-MSH, which could result in similar anorexigenic effects. The aim of this study was to highlight the role of the microbiome and the ClpB protein in deregulation and self-maintenance of anorexia pathology. Male C57Bl/6 mice were undergone to the ABA (Activity-Based Anorexia) protocol: after 5 days of acclimatization, both ABA and LFA (Limited Food Access) mice had progressively limited access to food until D17. At the end of protocol, the plasma ClpB concentration and Enterobacteriaceae DNA in colonic content were measured. As expected, dietary restriction induced lost weight in LFA and ABA mice. At D10, colonic permeability and plasma concentration of the ClpB protein were significantly increased in LFA and ABA mice vs. controls. At D17, plasma concentration of ClpB was increased in LFA and ABA mice and, it was correlated with proportion of Enterobacteriaceae in the faeces. These abnormally high ClpB concentrations and all associated factors, and therefore might contribute to the initiation and/or perpetuation of anorexia nervosa by interfering with satiety signaling.

scholarly journals Assessment of Glyphosate Impact on the Agrofood Ecosystem

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 405
Author(s):  
Yaxin Sang ◽  
Juan-Carlos Mejuto ◽  
Jianbo Xiao ◽  
Jesus Simal-Gandara
Keyword(s):  
Risk Assessment ◽  
Food Production ◽  
Mitigation Strategies ◽  
Regulatory Control ◽  
Biological Pest Control ◽  
Effective Strategies ◽  
Nutrition Security ◽  
Production And Consumption ◽  
Food And Nutrition ◽  
The Impact

Agro-industries should adopt effective strategies to use agrochemicals such as glyphosate herbicides cautiously in order to protect public health. This entails careful testing and risk assessment of available choices, and also educating farmers and users with mitigation strategies in ecosystem protection and sustainable development. The key to success in this endeavour is using scientific research on biological pest control, organic farming and regulatory control, etc., for new developments in food production and safety, and for environmental protection. Education and research is of paramount importance for food and nutrition security in the shadow of climate change, and their consequences in food production and consumption safety and sustainability. This review, therefore, diagnoses on the use of glyphosate and the associated development of glyphosate-resistant weeds. It also deals with the risk assessment on human health of glyphosate formulations through environment and dietary exposures based on the impact of glyphosate and its metabolite AMPA—(aminomethyl)phosphonic acid—on water and food. All this to setup further conclusions and recommendations on the regulated use of glyphosate and how to mitigate the adverse effects.

scholarly journals Actions on sustainable food production and consumption for the post-2020 global biodiversity framework

2021 ◽  
Vol 7 (12) ◽  
pp. eabc8259
Author(s):  
Izabela Delabre ◽  
Lily O. Rodriguez ◽  
Joanna Miller Smallwood ◽  
Jörn P. W. Scharlemann ◽  
Joseph Alcamo ◽  
...  
Keyword(s):  
Food Production ◽  
Food Systems ◽  
Transformative Change ◽  
Political Commitment ◽  
Sustainable Food ◽  
Sustainable Food Production ◽  
The United Kingdom ◽  
Production And Consumption ◽  
Barriers And Opportunities ◽  
Sustainability Standards

Current food production and consumption trends are inconsistent with the Convention on Biological Diversity’s 2050 vision of living in harmony with nature. Here, we examine how, and under what conditions, the post-2020 biodiversity framework can support transformative change in food systems. Our analysis of actions proposed in four science-policy fora reveals that subsidy reform, valuation, food waste reduction, sustainability standards, life cycle assessments, sustainable diets, mainstreaming biodiversity, and strengthening governance can support more sustainable food production and consumption. By considering barriers and opportunities of implementing these actions in Peru and the United Kingdom, we derive potential targets and indicators for the post-2020 biodiversity framework. For targets to support transformation, genuine political commitment, accountability and compliance, and wider enabling conditions and actions by diverse agents are needed to shift food systems onto a sustainable path.

Potential of World Agro-Food Sphere: Pluralism of Assessments

2011 ◽  
pp. 3-14
Author(s):  
E. Kovalev
Keyword(s):  
Food Production ◽  
Technological Progress ◽  
Good Reason ◽  
World Population ◽  
Food Crisis ◽  
Human Beings ◽  
Foreseeable Future ◽  
Production And Consumption ◽  
Technological Civilization ◽  
The Way

In 2007-2008 the world food crisis has substantially aggravated. This is a good reason to ponder over the fate of our technological civilization and a reminder of the finite nature of the resources used by the mankind. These resources include minerals, land suitable for cultivation, water and, at last, the technologies for securing the growing world population with the foods. The crisis has opened the eyes of many enthusiasts of the scientific and technological progress to some of its bitter fruits, in particular, to the polarization of food production and consumption, hunger and poverty of millions human beings, environmental pollution, progressive exhaustion of resources. Still, there are enough reasons to be optimistic. Earth's civilization has survived many turning points and has always found the way out and the methods to resolve the problem. It may be hoped that the humanity will also found the way out from the maze of problems that showed up as a result of the food crisis, at least in the foreseeable future.

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