نتایج جستجو برای: foraging females behaved no differently in patch residence times

تعداد نتایج: 17626162  

Journal: :حفاظت گیاهان 0
راسخ راسخ اللهیاری اللهیاری میکائود میکائود

abstract competition is a phenomenon that influences the size, structure and stability of insect communities, particularly on solitary endoparasitoids species. although, competition normally incurs costs, it might be adaptive for the surviving individual. to determine which factors affect the patch use strategy of foragers under competition, the effect of previous experience with hosts already-...

Journal: :دانش گیاه پزشکی ایران 0
آرش راسخ استادیار شهیدچمران اهواز حسین الهیاری دانشیار دانشگاه تهران قدرت اله صباحی استادیار دانشگاه تهران

animals that can estimate their desirable habitat quality are better able to accordingly adapt their life behaviors. the life cycles of parasitoids are so closely adapted as to match their hosts life behavior. among the various host-parasitoid interactions, a peculiarity is the seasonal synchrony between host and parasitoid activity. the foraging and oviposition behaviors of lysiphlebus fabarum...

Journal: :حفاظت گیاهان 0
راسخ راسخ خرازی پاکدل خرازی پاکدل اللهیاری اللهیاری پاول میکائود پاول میکائود

abstract parasitic insects face many decisions when foraging for host, some for example frequently have to make decisions with regard to staying in or leaving their current patch. in this study, we investigated how the foraging and oviposition behavior of lysiphlebus fabarum is influenced by (1) a female’s previous experience of encountering aphids host and (2) age of female parasitoids. to tes...

2012
Claire M-S Dufour Philippe Louâpre Joan van Baaren Véronique Martel

Optimal foraging models predict how an organism allocates its time and energy while foraging for aggregated resources. These models have been successfully applied to organisms such as predators looking for prey, female parasitoids looking for hosts, or herbivorous searching for food. In this study, information use and patch time allocation were investigated using male parasitoids looking for ma...

Journal: :Journal of theoretical biology 2012
Marysa Laguë Nessy Tania Joel Heath Leah Edelstein-Keshet

Significant progress has been made towards understanding the social behaviour of animal groups, but the patch model, a foundation of foraging theory, has received little attention in a social context. The effect of competition on the optimal time to leave a foraging patch was considered as early as the original formulation of the marginal value theorem, but surprisingly, the role of facilitatio...

1996
MATTHEW H. PERSONS GEORGE W. UETZ

Foraging models emphasize reward and/or prey capture rates as primary determinants of residence time. The influence of sensory information has rarely been examined experimentally, but may also be important in animal foraging decisions. This study examined the influence of sensory cues without food reward on residence time in wolf spiders, as well as the interaction of visual and vibratory infor...

2017
Ola Olsson Joel S. Brown Henrik G. Smith

A forager’s gain curve, the cumulative number of prey harvested from a patch as a function of time spent in the patch, influences optimal patch departure rules and interpretations of patch use data. We describe models of five different search strategies that yield different gain curves. Hence they would influence a forager’s decision for patch departure differently and, consequently, how resear...

Journal: :دانش گیاه پزشکی ایران 0
آرش راسخ استادیار دانشکده کشاورزی دانشگاه شهید چمران اهواز عزیز خرازی پاکدل استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران حسین اللهیاری استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران جی.پی. میچاد دانشیار مرکز تحقیقات کشاورزی هایز، دانشگاه ایالتی کانزاس، آمریکا رویا فرهادی استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران

the black bean aphid, aphis fabae scopoli, is a major pest of broad bean, vicia faba l. and sugar beet, beta vulgaris l., the most abundant parasitoid of a. fabae in agroecosystems is lysiphlebus fabarum (marshall), a multivoltine species with mainly thelytokous reproduction in central europe. since l. fabarum females mimic ants to obtain honeydew directly from aphids it was reasoned that a fem...

Journal: :Behavioural processes 2015
Allert I Bijleveld Jan A van Gils Jeltje Jouta Theunis Piersma

Social foraging is common and may provide benefits of safety and public information. Public information permits faster and more accurate estimates of patch resource densities, thus allowing more effective foraging. In this paper we report on two experiments with red knots Calidris canutus, socially foraging shorebirds that eat bivalves on intertidal mudflats. The first experiment was designed t...

Journal: :Animal behaviour 1999
Persons

The wolf spider, Schizocosa ocreata (Hentz), varies foraging patch residence time in the presence of different sensory cues from prey, even without food rewards. This study examines the influence and interaction of hunger state, age and sex on the use of different types of sensory information to determine foraging patch sampling duration. In a series of two-chambered artificial foraging patches...

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