نتایج جستجو برای: m scutellata

تعداد نتایج: 538994  

Journal: :Current biology : CB 2018
Lucy King Michael Pardo Sameera Weerathunga T V Kumara Nilmini Jayasena Joseph Soltis Shermin de Silva

Asian elephants (Elephas maximus) are threatened primarily by habitat loss and human-elephant conflict. In addition to establishing protected areas and corridors for wildlife, empowering farmers to protect their crops is crucial for Asian elephant conservation [1,2]. Elephants can habituate to artificial deterrents, hence natural biological alternatives are of great interest [2,3]. African elep...

2016
Kyle Shackleton Nicholas J. Balfour Hasan Al Toufailia Roberto Gaioski Marcela de Matos Barbosa Carina A. de S. Silva José M. S. Bento Denise A. Alves Francis L. W. Ratnieks

Foraging animals must often decide among resources which vary in quality and quantity. Nectar is a resource that exists along a continuum of quality in terms of sugar concentration and is the primary energy source for bees. Alternative sugar sources exist, including fruit juice, which generally has lower energetic value than nectar. We observed many honeybees (Apis mellifera scutellata) foragin...

Journal: :Molecular ecology resources 2015
Nadine C Chapman Brock A Harpur Julianne Lim Thomas E Rinderer Michael H Allsopp Amro Zayed Benjamin P Oldroyd

The honeybee, Apis mellifera, is the world's most important pollinator and is ubiquitous in most agricultural ecosystems. Four major evolutionary lineages and at least 24 subspecies are recognized. Commercial populations are mainly derived from subspecies originating in Europe (75-95%). The Africanized honeybee is a New World hybrid of A. m. scutellata from Africa and European subspecies, with ...

2016
Samir M Kadri Brock A Harpur Ricardo O Orsi Amro Zayed

The Africanized honeybee (AHB) is a population of Apis mellifera found in the Americas. AHBs originated in 1956 in Rio Clara, Brazil where imported African A. m. scutellata escaped and hybridized with local populations of European A. mellifera. Africanized populations can now be found from Northern Argentina to the Southern United States. AHBs-often referred to as 'Killer Bees'- are a major con...

Journal: :Physiology & behavior 1997
J Núñez L Almeida N Balderrama M Giurfa

Changes of the stinging response threshold of Apis mellifera scutellata were measured on foragers fixed on a holder and stimulated with an electric shock as a noxious stimulus. The threshold of responsiveness to the noxious stimulus increased when bees were previously stimulated with isopentyl acetate, which is a main component of the alarm pheromone of the sting chamber. This effect is antagon...

Journal: :International journal of advanced biochemistry research 2022

The world of mushrooms is rich in species high interest due to their nutritional and pharmaceutical values. However, this includes also non-edible species, which are not consumed being poisonous, awful smell, or causing some serious gastrointestinal symptoms. Apart from no value, the study chemical composition revealed presence biologically active compounds that can be used for medicinal biolog...

Journal: :علوم گیاهان زراعی ایران 0
میرزا حسین رشنو دانشجوی دکتری تربیت مدرس زین العابدین طهماسبی دانشیار، دانشگاه تربیت مدرس، دانشکده کشاورزی، گروه زراعت و اصلاح نباتات، تخصص: فیزیولوژی گیاهان زراعی، اثر تنش های محیطی بر گیاهان زراعی حسین حیدری شریف آباد استاد دانشگاه ازاد اسلامی واحد علوم تحقیقات تهران سید علی محمد مدرس ثانوی استاد دانشگاه تربیت مدرس رضا توکل افشاری استاد پردیس کشاورزی کرج

to determine the effects of drought stress and fe and zn spraying on two annual medics, namely, medicago polymorph cv serena and medicago scutellata cv comertial, a field experiment as a split factorial based on a randomized complete blockdesign in 3 replications in allborze agricultural research center, in karaj was conducted. spraying treatments include distilled water (control), fe, zn and f...

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