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Walter M. Farina
University of Buenos Aires
TrophallaxisNectarForagingEcologyBiology
99Publications
26H-index
2,093Citations
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Publications 98
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#1María Sol Balbuena (UBA: University of Buenos Aires)H-Index: 5
#1M. Sol Balbuena (UBA: University of Buenos Aires)H-Index: 2
Last. Walter M. Farina (UBA: University of Buenos Aires)H-Index: 26
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Abstract In stingless bees, unlike honey bees, the relationship between chemosensory abilities and colony labor division has been poorly studied. Here we examined odor reception and gustatory responsiveness of the stingless bee Tetragonisca angustula focusing on workers, whose are involved in different tasks. Using the proboscis extension response, we studied sucrose response thresholds (SRTs) of foragers and guards. Peripheral responses to odors at the antennae were recorded by electroantennogr...
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#1Diego E. Vázquez (Facultad de Ciencias Exactas y Naturales)H-Index: 2
#2M. Sol Balbuena (Facultad de Ciencias Exactas y Naturales)H-Index: 2
Last. Walter M. Farina (Facultad de Ciencias Exactas y Naturales)H-Index: 26
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Sleep plays an essential role in both neural and energetic homeostasis of animals. Honey bees (Apis mellifera) manifest the sleep state as a reduction in muscle tone and antennal movements, which is susceptible to physical or chemical disturbances. This social insect is one of the most important pollinators in agricultural ecosystems, being exposed to a great variety of agrochemicals, which might affect its sleep behaviour. The intake of glyphosate (GLY), the herbicide most widely used worldwide...
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#1Diego E. Vázquez (Facultad de Ciencias Exactas y Naturales)
#1Diego E. Vázquez (Facultad de Ciencias Exactas y Naturales)H-Index: 2
Last. Walter M. Farina (UBA: University of Buenos Aires)H-Index: 26
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Abstract The honey bee Apis mellifera is the most abundant managed pollinator in diverse crops worldwide. Consequently, it is exposed to a plethora of environmental stressors, among which are the agrochemicals. In agroecosystems, the herbicide glyphosate (GLY) is one of the most applied. In laboratory assessments, GLY affects the honey bee larval development by delaying its moulting, among other negative effects. However, it is still unknown how GLY affects larval physiology when there are no ob...
1 CitationsSource
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#1Walter M. Farina (Facultad de Ciencias Exactas y Naturales)H-Index: 26
#2M. Sol Balbuena (Facultad de Ciencias Exactas y Naturales)H-Index: 2
Last. Diego E. Vázquez (Facultad de Ciencias Exactas y Naturales)H-Index: 2
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The honeybee Apis mellifera is an important pollinator in both undisturbed and agricultural ecosystems. Its great versatility as an experimental model makes it an excellent proxy to evaluate the environmental impact of agrochemicals using current methodologies and procedures in environmental toxicology. The increase in agrochemical use, including those that do not target insects directly, can have deleterious effects if carried out indiscriminately. This seems to be the case of the herbicide gly...
4 CitationsSource
#1Maria Cecilia Estravis Barcala (UBA: University of Buenos Aires)H-Index: 1
#2Florencia Palottini (UBA: University of Buenos Aires)H-Index: 1
Last. Walter M. Farina (UBA: University of Buenos Aires)H-Index: 26
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Insect pollination is issential for hybrid seed production systems, among which, introduced and native bees are the primary pollinating agents transferring pollen from male fertile (MF) to male sterile (MS) lines. On a highly dimorphic sunflower (Helianthus annuus) crop, we assessed the foraging behavior of solitary Melissodes bees and honey bees Apis mellifera. We found that Melissodes spp. were dominant in and showed fidelity to MF plants, gathering sunflower pollen efficiently throughout the ...
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#1María Sol Balbuena (Facultad de Ciencias Exactas y Naturales)H-Index: 5
#2Andrés GonzálezH-Index: 16
Last. Walter M. Farina (Facultad de Ciencias Exactas y Naturales)H-Index: 26
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Honeybees ( Apis mellifera ) adjust their time and effort during foraging activity. Their metabolic rates together with body temperature rise while gathering profitable resources. These physiological changes may result in a differential cuticular profile, which in turn may bear communicational value. We evaluated if sucrose concentration of collected food affects the cuticular chemistry of honeybees during foraging. We trained bees to artificial feeders with high (2 M) and low (0.5 M) sucrose co...
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#1Michael Hrncir (UFERSA: Universidade Federal Rural do Semi-Árido)H-Index: 24
#2Camila Maia-Silva (UFERSA: Universidade Federal Rural do Semi-Árido)H-Index: 8
Last. Walter M. Farina (UBA: University of Buenos Aires)H-Index: 26
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In social insects, the tuning of activity levels among different worker task groups, which constitutes a fundamental basis of colony organization, relies on the exchange of reliable information on the activity level of individuals. The underlying stimuli, however, have remained largely unexplored so far. In the present study, we describe low-frequency thoracic vibrations generated by honey bee workers (Apis mellifera) within the colony, whose velocity amplitudes and main frequency components sig...
5 CitationsSource
#1Ismael Gatica Hernández (National University of Cuyo)H-Index: 1
#2Florencia Palottini (UBA: University of Buenos Aires)H-Index: 1
Last. Walter M. Farina (UBA: University of Buenos Aires)H-Index: 26
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ABSTRACT The honey bee is the most frequently used species in pollination services for diverse crops. In onion crops ( Allium cepa ), however, bees avoid visiting certain varieties, being attracted differently to male sterile (MS) and fertile (OP) lines. These differences might be based on the phenolic profiles of the cultivars9 nectars. To understand the relationship between nectar composition and pollinator attraction to different onion lines, we tested sensory and cognitive abilities and pala...
1 CitationsSource
#1Diego E. Vázquez (UBA: University of Buenos Aires)H-Index: 2
#1Diego Ezequiel Vázquez (UBA: University of Buenos Aires)H-Index: 1
Last. Walter M. Farina (UBA: University of Buenos Aires)H-Index: 26
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As the main agricultural insect pollinator, the honey bee (Apis mellifera) is exposed to a number of agrochemicals, including glyphosate (GLY), the most widely used herbicide. Actually, GLY has been detected in honey and bee pollen baskets. However, its impact on the honey bee brood is poorly explored. Therefore, we assessed the effects of GLY on larval development under chronic exposure during in vitro rearing. Even though this procedure does not account for social compensatory mechanisms such ...
15 CitationsSource
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