A5083017689- Insect and Arachnid Ecology and Behavior
- Plant and animal studies
- Bat Biology and Ecology Studies
- Insect and Pesticide Research
- Physiological and biochemical adaptations
- Animal Behavior and Reproduction
- Amphibian and Reptile Biology
- Species Distribution and Climate Change
- Marine animal studies overview
- Animal Vocal Communication and Behavior
- Neurobiology and Insect Physiology Research
- Yersinia bacterium, plague, ectoparasites research
- Metabolism and Genetic Disorders
- Fish Ecology and Management Studies
- Wildlife Ecology and Conservation
- Hemoglobin structure and function
- Neonatal Health and Biochemistry
- Effects of Environmental Stressors on Livestock
- Animal Ecology and Behavior Studies
- Adipose Tissue and Metabolism
- Insect Utilization and Effects
- Sirtuins and Resveratrol in Medicine
- Erythrocyte Function and Pathophysiology
- Isotope Analysis in Ecology
- Human-Animal Interaction Studies
Tel Aviv University
2013-2025
University of Arizona
2014-2018
Open University of Israel
2006
Summary The NAD+‐dependent SIRT6 deacetylase is a therapeutic candidate against the emerging metabolic syndrome epidemic. SIRT6, whose deficiency in mice results premature aging phenotypes and defects, was implicated calorie restriction response that showed an opposite set of from syndrome. To explore role stress, wild type transgenic (TG) overexpressing were fed high fat diet. In comparison to their wild‐type littermates, TG accumulated significantly less visceral fat, LDL‐cholesterol,...
Abstract Sexual dimorphisms are responsible for profound metabolic differences in health and behavior. Whether males females react differently to environmental cues, such as solar ultraviolet (UV) exposure, is unknown. Here we show that exposure induces food-seeking behavior, food intake, behavior intake men, but not women, through epidemiological evidence of approximately 3,000 individuals throughout the year. In mice, UVB leads increased weight gain, with a sexual dimorphism towards males....
Sugar rush Flying requires high levels of energy production, which causes muscular oxidative damage. Food-derived antioxidants can protect against such damage; however, nectar is devoid these compounds. Levin et al. found that nectar-feeding hawkmoths fed concentrations sugar had lower damage than unfed moths. Sugar-fed moths generated antioxidant compounds by shunting glucose through a pentose phosphate pathway. This mechanism may have allowed for the evolution energy-intensive flying...
Animals often deal with situations in which vast sensory input is received simultaneously. They therefore must possess sophisticated mechanisms to select important and ignore the rest. In bat echolocation, this problem at its extreme. Echolocating bats emit sound signals analyse returning echoes sense their environment. Bats from same species use similar frequencies. Nearby face difficulty of distinguishing own other bats, a referred as jamming. Because commonly fly large groups, jamming...
Ethanol, a natural by-product of sugar fermentation, can be found in various fruits and nectar. Although many animals routinely consume ethanol low concentrations as part their diets, its inherent toxicity cause severe damage. Even species particularly well adapted to consumption face detrimental effects when exposed above 4%. Here, we investigated the metabolism impact on survival behavior Oriental hornet ( Vespa orientalis ), social wasp that naturally consumes ethanol. We show chronic...
The ability to allocate resources, even when limited, is essential for survival and fitness. We examine how nutrients that occur in minute amounts are allocated among reproductive, somatic, metabolic demands. In addition sugar, flower nectars contain two macronutrients-amino acids fatty acids. created artificial spiked with 13C-labelled amino fed these adult moths (Manduca sexta: Sphingidae) understand they competing sinks (reproduction, somatic tissue, fuel). found both non-essential were...
The reptilian form of hibernation (brumation) is much less studied than its mammalian and insect equivalents. Hibernation brumation share some basic features but may differ in others. Evidence for hypometabolism brumating reptiles beyond the effect temperature sporadic often ignored. We calculated standard metabolic rates (SMR, oxygen uptake during inactivity), winter and/or summer, 156 individuals representing 59 species Israeli squamates across all 17 local families. For 32 species, we...
Abstract Aim Squamate fitness is affected by body temperature, which in turn influenced environmental temperatures and, many species, exposure to solar radiation. The biophysical drivers of temperature have been widely studied, but we lack an integrative synthesis actual experienced the field, and their relationships temperatures, across phylogeny, behaviour climate. Location Global (25 countries on six continents). Taxa Squamates (210 representing 25 families). Methods We measured 20,231...
Abstract Marine iguanas occasionally face severe food shortages because of algal dieback during El Niño events. Research on their adaptations to these periods has highlighted unique ability shrink in body length, which reduces energetic needs. Additional mechanisms, like sustaining lower temperatures and metabolic rates, could potentially also energy consumption, but have never been examined. We measured 665 over an 11‐year period including three events, examined how heart rates (a proxy for...
ABSTRACT Aim More species‐rich communities are often assumed to contain more specialist species with narrower niches and smaller ranges. Stronger interspecific competition in is thought be a key mechanism explaining these patterns. Yet, the relationship between richness specialisation has so far only been studied for few taxa, characterising effects of on distributions challenging. Here, we assess broad‐scale relationships niche breadth, range sizes geographic exclusion along gradients bats....
Competition has long been assumed to be a major driver in regulating ecological communities. Intra-specific competition is considered maximal as members of the same species use niches similar way. Many animals exhibit great physiological, behavioral, and morphological differences between sexes (sexual dimorphism). Here we report an extreme geographical segregation greater mouse-tailed bat (Rhinopoma microphyllum). To gain insight into driving mechanisms sexual outside mating season,...
We report that two species of mouse-tailed bats ( Rhinopoma microphyllum and R. cystops ) hibernate for five months during winter in geothermally heated caves with stable high temperature (20°C). While hibernating, these do not feed or drink, even on warm nights when other bat are active. used thermo-sensitive transmitters to measure the bats’ skin natural hibernacula open flow respirometry torpid metabolic rate at different ambient temperatures T a , 16–35°C) evaporative water loss (EWL)...
In winter, many reptiles have a period of inactivity ("brumation"). During brumation there is no energetic intake, therefore would be an advantage to reducing expenditure. The size energetically costly organs, major determinant metabolic rate, known flexible in tetrapods. Seasonal plasticity organ could serve as both energy-saving mechanism and source nutrients for brumating reptiles. We studied population invasive gecko, Tarentola annularis, test seasonal changes activity, mass various...
Abstract Aim There is an increasing evidence showing that species within various taxonomic groups have reticulate evolutionary histories with several cases of introgression events. Investigating the phylogeography complexes can provide insight into these introgressions, and when where hybridizations occurred. In this study, we investigate biogeography a widely distributed Western Palaearctic bat complex, namely Myotis nattereri sensu lato. This complex exhibits high genetic diversity in its...
The different reproductive strategies of males and females underlie differences in behavior that may also lead to nutrient use between the two sexes. We studied sex utilization essential amino acids (EAAs) one non-essential acid (NEAA) by Carolina sphinx moth (Manduca sexta). On day post-eclosion from pupae, adult male moths oxidized greater amounts larva-derived AAs than females, more nectar-derived after feeding. After 4 days starvation, opposite pattern was observed: males. Adult...
Abstract Adult wasps primary food resource is larval saliva. This liquid secretion consists mainly of amino acids and carbohydrates processed from the prey brought to colony by foragers. However, adults also regularly consume floral nectar. The nectar's most abundant proteinogenic acid proline, two non-proteinogenic are β-alanine GABA. These three common in Here, we study effect these dietary on physiology nest construction behavior Oriental hornet. Our results reveal their deleterious...
Males of social Hymenoptera spend the first days following eclosion inside nest before dispersing to find a young queen mate with. During this period, they must acquire enough nutrients enable their sexual maturation and store energy sustain them through nuptial journey. It was previously argued that adult hornets are unable process dietary proteins rely on larvae supply with free amino acids carbohydrates secrete via trophallaxis. Using isotopically enriched diets, we examined nutrient...