The superseded female's dilemma: ultimate and proximate factors that influence guarding behaviour of the carpenter bee Xylocopa pubescens

1993 ◽  
Vol 33 (6) ◽  
Author(s):  
Katja Hogendoorn ◽  
Remko Leys
Keyword(s):  
Carpenter Bee ◽  
Proximate Factors ◽  
Xylocopa Pubescens

Social Behaviour of the Carpenter Bee Xylocopa pubescens (Spinola)

Ethology ◽  
2010 ◽  
Vol 79 (4) ◽  
pp. 281-294 ◽  
Author(s):  
Jan Blom ◽  
Hayo H. W. Velthuis
Keyword(s):  
Social Behaviour ◽  
Carpenter Bee ◽  
Xylocopa Pubescens

FLOWERING AND POLLINATION REQUIREMENTS IN CEREUS PERUVIANUS CULTIVATED IN ISRAEL

1994 ◽  
Vol 42 (2) ◽  
pp. 149-158 ◽  
Author(s):  
J. Weiss ◽  
A. Nerd ◽  
Y. Mizrahi
Keyword(s):  
Fruit Set ◽  
Fruit Weight ◽  
Open Pollination ◽  
Seed Number ◽  
Beer Sheva ◽  
Carpenter Bee ◽  
Cross Pollination ◽  
Hot Season ◽  
Very High ◽  
Xylocopa Pubescens

The flowering and pollination requirements of Cereus peruvianus (L) Mill. (Cactaceae) were investigated in Beer Sheva, Israel, in a three-year-old plantation which had been established from seedlings, in order to domesticate this plant as a fruit crop. Plants flowered during the hot season (May-October), and flowers opened for one night only. Variations were observed in the flowers' opening time, with the early-opening plants beginning to open two hours before sunset, and the late-opening plants opening close to sunset. Flowers were visited only by day-active insects: the honey bee (Apis mellifera) and the carpenter bee (Xylocopa pubescens). The visitors' behavior indicated that they were involved in pollination. Early-opening flowers were visited both in the evening and in the morning, whereas late-openers were visited only in the morning. C. peruvianus was found to be self-incompatible, and fruit set did not occur when flowers were hand self-pollinated. Hand cross-pollination resulted in very high fruit set (92%) and heavy fruits with a high seed number. Fruit set, seed number, and fruit weight were lower in open-pollination than in hand cross-pollination. This indicates limited pollination or fertilization in open- pollination and might be related to the briefness of the bee visits, reduced pollen germinability, and stigma receptivity during part of the visit period.

scholarly journals First record of the carpenter bee Xylocopa pubescens (Hymenoptera, Apidae) in the Canary Islands confirmed by DNA barcoding

2020 ◽  
Vol 80 ◽  
pp. 169-175
Author(s):  
Carlos Ruiz ◽  
Daniel Suárez ◽  
Manuel Naranjo ◽  
Pilar De la Rúa
Keyword(s):  
Canary Islands ◽  
North Africa ◽  
First Record ◽  
Local Fauna ◽  
Island Ecosystems ◽  
Gran Canaria ◽  
Carpenter Bee ◽  
First Time ◽  
The City ◽  
Xylocopa Pubescens

Island ecosystems are particularly vulnerable to the introduction of exotic species that can have an impact on local fauna and flora. Here, the carpenter bee Xylocopa pubescens is reported in Gran Canaria (Canary Islands, Spain) for the first time. This species is native to North Africa and the Near East and shows a rapid dispersion across the city of Las Palmas de Gran Canaria, together with a single record in the southernmost tip of the island. Different hypotheses about its arrival to the island are discussed.

Replacement names for two small carpenter bees from India (Hymenoptera: Apidae, Ceratina)

2018 ◽  
Vol 154 (4) ◽  
pp. 296-298
Author(s):  
Michael S. Engel
Keyword(s):  
Carpenter Bee ◽  
Carpenter Bees ◽  
Small Carpenter Bee

Nomenclatorial corrections are provided for two cases of secondary homonymy within the small carpenter bee genus Ceratina Latreille (Apidae: Xylocopinae: Ceratinini). Images of female and male paratypes are included for Ceratina (Pithitis) apatela nom. nov. (formerly P. vechti Baker).

scholarly journals Reproductive traits and floral visitors of Aechmea distichantha plants growing in different habitats of a South American xerophytic forest

Rodriguésia ◽  
2018 ◽  
Vol 69 (2) ◽  
pp. 385-396 ◽  
Author(s):  
Rodrigo M. Freire ◽  
Ignacio M. Barberis ◽  
José L. Vesprini
Keyword(s):  
Reproductive Traits ◽  
Climatic Conditions ◽  
Similar Proportion ◽  
South American ◽  
The Sun ◽  
Carpenter Bee ◽  
Carpenter Bees ◽  
Vegetative Traits ◽  
Floral Visitors ◽  
Almost All

Abstract Aechmea distichantha, a widely-distributed facultative epiphytic bromeliad species, is present from rainforests to xerophytic forests. At its southernmost distribution (Humid Chaco) it grows in the understory and forest edges. This animal-pollinated bromeliad shows high phenotypic plasticity on its vegetative traits, but there is no information about plasticity on its reproductive traits. Infructescences from shade plants were heavier, had longer rachis, more spikelets, higher number of fruits/spikelet and higher number of seeds/fruit than those from sun plants, but they presented similar number of open flowers. The number of visitation events was similar in both habitats, but more flowers were visited in the sun than in the shade. Flowers were visited by seven species (six insects and one hummingbird). In the sun, the carpenter bee was the most frequent visitor and visited almost all flowers, whereas in the shade different species of visitors attained similar proportion of visits and number of visited flowers. Despite visitation events were similar in both habitats, plants growing in the shade set more seeds/fruit than plants growing in the sun. The higher proportion of visits accomplished by carpenter bees compared to hummingbirds is probably a consequence of the climatic conditions in the austral location of these populations.

Expanding Evolutionary Psychology: toward a Better Understanding of Violence and Aggression

2003 ◽  
Vol 42 (1) ◽  
pp. 5-50 ◽  
Author(s):  
Iver Mysterud ◽  
Dag Viljen Poleszynski
Keyword(s):  
Evolutionary Psychology ◽  
Food Allergies ◽  
Sociocultural Factors ◽  
The Past ◽  
Physical Chemical ◽  
Reactive Hypoglycemia ◽  
Proximate Factors ◽  
Survival And Reproduction ◽  
The Common ◽  
Habitual Intake

The “mainstream” evolutionary psychology model is currently under criticism from scientists of other persuasions wanting to expand the model or to make it more realistic in various ways. We argue that focusing on the environment as if it consisted only of social (or sociocultural) factors gives too limited a perspective if evolutionary approaches are to understand the behavior of modern humans. Taking the case of violence, we argue that numerous novel environmental factors of nutritional and physical-chemical origin should be considered as relevant proximate factors. The common thesis presented here is that several aspects of the biotic or abiotic environment are able to change brain chemistry, thus predisposing individuals to violence and aggression in given contexts. In the past, aggressive behavior has had a number of useful functions that were of particular importance to our ancestors' survival and reproduction. However, some of the conditions in our novel environment, which either lowered the threshold for aggression or released such behavior in contexts which were adaptive in our evolutionary past, no longer apply. It is high time evolutionary approaches to violence are expanded to include the possibilities that violence may be triggered by nutritionally depleted foods, reactive hypoglycemia caused by habitual intake of foods with a high glycemic index (GI), food allergies/intolerances and exposure to new environmental toxins (heavy metals, synthetic poisons).

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