| responses of antennal campaniform sensilla to rapid temperature changes in ground beetles of the tribe platynini with different habitat preferences and daily activity rhythms. | responses of temperature sensitive (cold) cells from the antenna of ground beetles (tribe platynini) were compared in species with different ecological preferences and daily activity rhythms. action potential rates were characterized at various temperatures (ranges 23-39 degrees c) and during rapid changes in it (deltat=0.5-15 degrees c). the stationary firing frequencies were nearly twice as high in eurythermic open field ground beetles agonum muelleri and anchomenus dorsalis (firing rates rang ... | 2006 | 16527304 |
| volatile compounds released by disturbed and undisturbed adults of anchomenus dorsalis (coleoptera, carabidae, platynini) and structure of the pygidial gland. | volatile compounds produced by adults of anchomenus dorsalis under undisturbed and disturbed conditions were investigated with an all-glass aeration apparatus. gc-ms analysis of the crude extracts from undisturbed and disturbed adults highlighted four major volatile compounds, undecane, heneicosane, z-9 tricosene and tricosane, of which significantly more undecane was released by disturbed adults compared to undisturbed beetles. the pygidial glands of adults of anchomenus dorsalis were investiga ... | 2011 | 21594158 |
| predator feeding choice on conspicuous and non-conspicuous carabid beetles: first results. | insects use various types of behaviour, chemical defences, mimetic, aposematic or cryptic appearances as anti-predatory strategies. among insects, carabid beetles of the genus brachinus are distasteful prey because they discharge an irritating "cloud" of quinones when threatened. these beetles live in aggregations and adopt warning (conspicuous pattern) colours and chemicals to create a template that is easily learnt by predators. another carabid beetle, anchomenus dorsalis, mimics the colours a ... | 2011 | 21738410 |
| optimal foraging for specific nutrients in predatory beetles. | evolutionary theory predicts that animals should forage to maximize their fitness, which in predators is traditionally assumed equivalent to maximizing energy intake rather than balancing the intake of specific nutrients. we restricted female predatory ground beetles (anchomenus dorsalis) to one of a range of diets varying in lipid and protein content, and showed that total egg production peaked at a target intake of both nutrients. other beetles given a choice to feed from two diets differing o ... | 2012 | 22237910 |
| body size and nutrition intake effects on fecundity and overwintering success in anchomenus dorsalis (coleoptera: carabidae). | structural body size and adult feeding conditions seem to be important determinants of fitness in income breeding species. however, little is known about the relative importance of structural body size and nutritional state on fecundity and winter survival in carabids. in this study, two separate experiments were performed. the effects of the structural body size of females (expressed as the length of the elytra and the width of the pronotum) and the effect of starvation on the fecundity of the ... | 2014 | 25525105 |
| balancing of lipid, protein, and carbohydrate intake in a predatory beetle following hibernation, and consequences for lipid restoration. | carnivorous animals are known to balance their consumption of lipid and protein, and recent studies indicate that some mammalian carnivores also regulate their intake of carbohydrate. we investigated macronutrient balancing and lipid restoration following hibernation in the ground beetle anchomenus dorsalis, hypothesizing that carbohydrates might be important energy sources upon hibernation when predator lipid stores are exhausted and prey are equally lean. we recorded the consumption of lipid, ... | 2016 | 26868725 |
| relative importance of sex, pre-starvation body mass and structural body size in the determination of exceptional starvation resistance of anchomenus dorsalis (coleoptera: carabidae). | in nature, almost all animals have to cope with periods of food shortage during their lifetimes. starvation risks are especially high for carnivorous predatory species, which often experience long intervals between stochastic prey capturing events. a laboratory experiment using the common predatory carabid beetle anchomenus dorsalis revealed an exceptional level of starvation resistance in this species: males survived up to 137 days and females up to 218 days without food at 20°c. individual sta ... | 2016 | 26978071 |
| predatory beetles feed more pest beetles at rising temperature. | climate warming is a challenge for many plants and animals as they have to respond to rising temperature. rising temperature was observed to affect herbivores and predators. activity-density of abundant predatory carabid beetles, which are considered important natural control agents of agricultural pests, was observed to increase at rising temperature. the pollen beetle meligethes aeneus is one of the most important insect pests in european oilseed rape fields, and its larvae were observed to be ... | 2016 | 27084775 |