Botanical sources and sugar concentration of the nectar collected by two stingless bee species in a tropical African rain forest

Kajobe, Robert

doi:10.1051/apido:2006051

Cited by 21 publications

(14 citation statements)

References 23 publications

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“…The lack of a correlation between nectar volume and sugar concentration can be associated with differences in evaporation and nectar secretion rates, since the concentration of sugars in nectar depends on the rate of pollinator visitation and environmental conditions (solar radiation, rain, wind and temperature) (Kajobe 2007). These results corroborate those reported by Aguilar-Rodríguez et al (2014), who observed a non-significant correlation between volume and sugar concentration for the nectar of the bromeliad Tillandsia macropetala.…”

Section: Nectar Production and Floral Visitorssupporting

confidence: 86%

Floral and reproductive biology of Alcantarea nahoumii (Bromeliaceae), a vulnerable endemic species of the Atlantic Forest

Bastos

Souza

et al. 2017

Acta Bot. Bras.

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Alcantarea nahoumii occurs exclusively in the state of Bahia, Brazil, and is classifi ed as vulnerable due to deforestation and frequent fi res in the region. Knowledge of fl oral and reproductive biology is fundamental to understanding ecological interactions, as well as the reproductive success of plant species. Th e objective of this study was to evaluate the fl oral and reproductive biology of A. nahoumii in an Atlantic Forest fragment with regard to phenology, pollen viability, stigma receptivity, pollination ecology and reproductive systems, all of which are important parameters for of the development of conservation strategies for the species. Anthesis is diurnal and heterogeneous, starting at 6:30 a.m. and lasting until 8:00 a.m. Highest germination percentages and greatest pollen tube lengths were obtained in BK culture medium. Histochemical tests revealed high pollen viability (89.71 %). Stigma receptivity occurred during anthesis and lasted for up to 24 hours after fl oral opening. Alcantarea nahoumii exhibited preferential allogamy and self-compatibility, and required a pollinator to production of viable seeds. Sixteen species of pollinators were observed visiting A. nahoumii, among which were fi ve hummingbird species. Even though its reproductive system is effi cient, this bromeliad remains threatened mainly due to habitat fragmentation caused by deforestation, burning and predatory extractivism.

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Section: Nectar Production and Floral Visitorssupporting

confidence: 86%

Floral and reproductive biology of Alcantarea nahoumii (Bromeliaceae), a vulnerable endemic species of the Atlantic Forest

Bastos

Souza

et al. 2017

Acta Bot. Bras.

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“…This implies that the behavior must have been invented independently at Bulindi or else became extinct in these nearby communities (Wrangham 2006). However, while Meliponula bees occur at Sonso and Kibale (Kajobe 2007a;Gruber et al 2009), these bees nest in tree cavities as well as underground (Kajobe 2007b), and ground nests may not be common at these sites. It is not yet known if chimpanzee communities elsewhere in the forestfarm mosaic in Hoima District dig for honey with sticks.…”

Section: Discussionmentioning

confidence: 99%

Tool-use to obtain honey by chimpanzees at Bulindi: new record from Uganda

McLennan

2011

Primates

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Honey-gathering from bee nests has been recorded at chimpanzee (Pan troglodytes) study sites across tropical Africa. Different populations employ different strategies, ranging from simple 'smash-and grab' raids to use of sophisticated tool-sets, i.e., two or more types of tool used sequentially in a single task. In this paper I present evidence of tool-use, and the probable use of a tool-set, for honey-gathering by unhabituated chimpanzees at Bulindi, a forest-farm mosaic south of the Budongo Forest in Uganda. Between June and December 2007, 44 stick tools were found in association with 16 holes dug in the ground, corresponding to the period when stingless bees (Meliponula sp.) appeared in chimpanzee dung. In 11 cases the confirmed target was a Meliponula ground nest. Two potential tool types were distinguished: digging sticks encrusted with soil, and more slender and/or flexible sticks largely devoid of soil that may have functioned to probe the bees' narrow entry tubes. Reports of chimpanzees using tools to dig for honey have been largely confined to Central Africa. Honey-digging has not previously been reported for Ugandan chimpanzees. Similarly, use of a tool-set to obtain honey has thus far been described for wild chimpanzee populations only in Central Africa. Evidence strongly suggests that Bulindi chimpanzees also use sticks in predation on carpenter bee (Xylocopa sp.) nests, perhaps as probes to locate honey or to disable adult bees. These preliminary findings from Bulindi add to our understanding of chimpanzee technological and cultural variation. However, unprotected forests at Bulindi and elsewhere in the region are currently severely threatened by commercial logging and clearance for farming. Populations with potentially unique behavioral and technological repertoires are being lost.

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“…Acacia honey from both species had a significantly (p < 0.05) lower total sugar content than what was found in the other types of honeys. Kajobe (2007) [58] reported that the nectar composition is affected by the floral origin of the nectar, foraging behaviour and environmental factors. In terms of fructose, all tested stingless bee honeys contained higher fructose than glucose except starfruit and acacia from Geniotrigona thoracica.…”

Section: Colour Characteristicsmentioning

confidence: 99%

Influence of origins and bee species on physicochemical, antioxidant properties and botanical discrimination of stingless bee honey

Shamsudin

Selamat

Sanny

et al. 2019

International Journal of Food Properties

115

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The physicochemical characteristics, antioxidant properties and botanical discrimination according to the organic acid content in Malaysian stingless bee honey were investigated. The results showed that the botanical origin and bee species significantly influenced the physicochemical characteristics and antioxidant properties of stingless bee honey. Principle component analysis (PCA) revealed that stingless bee honey was differentiable from Apis mellifera honey by acetic, citric, D-malic and tartaric. Starfruit could be distinguished from gelam and acacia honeys by lactic. Whereas the gluconic and succinic acids were confirmed as a marker to discriminate honey samples from Heterotrigona itama and Geniotrigona thoracica species. ARTICLE HISTORY

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Botanical sources and sugar concentration of the nectar collected by two stingless bee species in a tropical African rain forest

Cited by 21 publications

References 23 publications

Floral and reproductive biology of Alcantarea nahoumii (Bromeliaceae), a vulnerable endemic species of the Atlantic Forest

Floral and reproductive biology of Alcantarea nahoumii (Bromeliaceae), a vulnerable endemic species of the Atlantic Forest

Tool-use to obtain honey by chimpanzees at Bulindi: new record from Uganda

Influence of origins and bee species on physicochemical, antioxidant properties and botanical discrimination of stingless bee honey

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