Results 61 to 70 of about 43,108 (256)

Building Blocks as Experiences in Dynamic Capacitated Arc Routing Problems

CAAI Transactions on Intelligence Technology, EarlyView.
ABSTRACT The dynamic capacitated arc routing problem (DCARP) aims to update the service paths of vehicles in the capacitated arc routing problem when uncertain factors deteriorate the current schedule of vehicles' services. A DCARP scenario comprises a series of DCARP instances that share similarities with each other. Therefore, optimisation experience
Hao Tong, Leandro L. Minku, Stefan Menzel, Bernhard Sendhoff, Xin Yao   +4 more
wiley   +1 more source

HONEY BEE COLONY PHEROMONES [PDF]

Journal of Central European Agriculture, 2001
Pheromones are chemicals produced as liquids by specialised cells or glands and transmitted into the environment as liquids or gases. In contrary to hormones, which are excreted in organism and have effect exclusively on organism that produced them ...
M Dražić, N Kezić
doaj  

Réduction des doses efficaces d'insecticides contre les larves de criquet pèlerin (Schistocerca gregaria Forskål, 1775 : Orthoptera, Acrididae) par utilisation de quantités réduites de phénylacétonitrile

Biotechnologie, Agronomie, Société et Environnement, 2013
Reduction of effective doses of insecticide against desert locust (Schistocerca gregaria Forskål, 1775: Orthoptera, Acrididae) nymphs using phenylacetonitrile. In order to reduce the amount of insecticides used during a locust upsurge, phenylacetonitrile
Bocar Bal, A., Sidati, SM.
doaj  

Semiokimia dan volatil lain pada Cheilomenes sexmaculata (Fabricius) (Coleoptera: Coccinellidae) yang memangsa Aphis gossypii Glover (Hemiptera: Aphididae) pada tanaman cabai

Jurnal Entomologi Indonesia
Cheilomenes sexmaculata (Fabricius) is a potential natural enemy of aphids. Various aspects of the ecology and biology of this predator have been studied; however, there is still limited information on its physiology, particularly regarding pheromones ...
Siska Efendi, Dadang, I Wayan Winasa, Ali Nurmansyah   +3 more
doaj   +1 more source

Why Did the Snake Cross the Road? Effects of Roads on Movement and Location of Mates by Garter Snakes (Thamnophis sirtalis parietalis)

Ecology and Society, 2004
If animals avoid road surfaces or are unable to follow conspecific trails across such surfaces, previously continuous populations may be fragmented. We gathered data on the effects of a small (4-m wide) gravel road on the behavior and trail-following ...
Richard Shine, Michael Lemaster, Michael Wall, Tracy Langkilde, Robert Mason   +4 more
doaj   +1 more source

Heating up parasitoid–host interactions: High temperature increased mortality of late‐instar braconid larvae and reduced ladybird recovery rate

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract With ongoing climate change, temperature‐dependent outcomes of host–parasitoid interactions can affect ecosystem functioning and key ecosystem services such as biological control. However, most studies addressing the impacts of temperature on host–parasitoid systems are
Florencia Baudino, Barbora Žabová, Michal Řeřicha, Michal Knapp   +3 more
wiley   +1 more source

Effect of Pig Synthetic Pheromones and Positive Handling of Pregnant Sows on the Productivity of Nursery Pigs

Veterinary Sciences
Weaning is one of the most important stress events in the life of pigs, increasing the risk for health problems and reduced performance. The release of pheromones in pig stables can be considered an environmental enrichment and alleviate the negative ...
Dimitri De Meyer, Ilias Chantziaras, Arthi Amalraj, Dominiek Maes   +3 more
doaj   +1 more source

Generation cycles in experimental populations of a multivoltine insect

Journal of Animal Ecology, EarlyView.
Although theory suggests various mechanisms by which environmental and ecological factors may drive generational fluctuations, our field‐cage experiment is the first to demonstrate how internal dynamics and external disturbances jointly produce synchronised, large‐scale outbreak cycles.
Takehiko Yamanaka, Yasushi Sato, William A. Nelson, Ottar N. Bjørnstad   +3 more
wiley   +1 more source

Using artificial neural networks to explain the attraction of jewel beetles (Coleoptera: Buprestidae) to colored traps

Insect Science, EarlyView.
Jewel beetles can discriminate leaf feeding sites and bark oviposition sites based upon the opponent comparison of their blue, green, and red photoreceptor signals. Through this mechanism, green traps resemble leaves, and purple traps resemble bark, explaining their different attractiveness to males and females.
Roger D. Santer, Otar Akanyeti
wiley   +1 more source

The predatory behavior of ants: an impressive panoply of morphological adaptations

Insect Science, EarlyView.
This review focuses on predation in ants, showing the wide diversity of cases from solitary foraging to group hunting tactics, as well as the evolution of mandible shape frequently adapted to capture specific prey. Although most ants are generalist feeders, finding their sugary substances directly on plants or indirectly via sap‐sucking insects, some ...
Alain Dejean, Xim Cerdá, Jérôme Orivel, Frédéric Azémar, Alexander L. Wild, Bruno Corbara, Axel Touchard   +6 more
wiley   +1 more source