scholarly journals Influence of the Foraging Activity of the Anthophilous Insects on Talinum triangulare (Waterleaf) fructification in Bafut (North West - Cameroon)

2021 ◽  
Vol 9 (12) ◽  
pp. 2106-2112
Author(s):  
Esther Nadine Otiobo Atibita ◽  
David Fotsing ◽  
Njoya Moses Tita Mogho ◽  
Champlain Djieto-Lordon ◽  
Fernand-Nestor Tchuenguem Fohouo
Keyword(s):  
Foraging Behavior ◽  
Central Africa ◽  
Insect Species ◽  
Foraging Activity ◽  
North West ◽  
Succulent Plant ◽  
West And Central Africa ◽  
The Tropics ◽  
Talinum Triangulare ◽  
Anthophilous Insects

Talinum triangulare is an herbaceous succulent plant eaten as a vegetable throughout the tropics including many countries in West and Central Africa and are an essential ingredient in traditional dishes. Experiments were made on the plant to examine the influence of foraging behavior of flowering insect on pollination and yields of this plant species in 2018 and 2019 at Bafut. Observations were made on 1615 to 4055 flowers per treatment. The treatments included unlimited floral access by visitors and bagged flowers to deny all visits. The study focused on the foraging behavior of flowering insects and their pollination activity (fruiting rate). The results show that 14 insect species visited waterleaf flowers and Camponotus flavomarginatus was the most frequent (33.20%). Insects foraged throughout the day light period. Their activity was highest between 10 am and 12 pm. Insect species foraged the flowers for pollen and nectar. The fructification rate of unrestricted floral access was significantly high than that of protected flowers to deny all visits. The maintenance of insect nest close to T. triangulare field is recommended to improve it fruits production.

scholarly journals The Challenges and Relevance of Exploring the Genetics of North Africa’s “Barbary Lion” and the Conservation of Putative Descendants in Captivity

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Simon A. Black
Keyword(s):  
North Africa ◽  
Genetic Research ◽  
Central Africa ◽  
Eastern Africa ◽  
Cultural Perspective ◽  
North African ◽  
Ecosystem Recovery ◽  
North West ◽  
West And Central Africa ◽  
African Lions

The lions of North Africa were unique in ecological terms as well as from a human cultural perspective and were the definitive lions of Roman and Medieval Europe. Labelled “Barbary” lions, they were once numerous in North Africa but were exterminated by the mid-20th century. Despite subsequent degeneration of the Atlas Mountain ecosystem through human pressures, the feasibility of lion reintroduction has been debated since the 1970s. Research on the long-established captive lion collection traditionally kept by the sultans and kings of Morocco has enabled selective breeding coordinated across Moroccan and European zoos involving a significant number of animals. Molecular genetic research has recently provided insights into lion phylogeny which, despite previous suggestions that all lions share recent common ancestry, now indicates clear distinctions between lions in North, West, and Central Africa, the Middle East, and India versus those in Southern and Eastern Africa. A review of the evolutionary relevance of North African lions highlights the important challenges and opportunities in understanding relationships between Moroccan lions, extinct North African lions, and extant lion populations in India and West and Central Africa and the potential role for lions in ecosystem recovery in those regions.

scholarly journals Gene diversity, agroecological structure and introgression patterns among village chicken populations across North, West and Central Africa

BMC Genetics ◽  
2012 ◽  
Vol 13 (1) ◽  
pp. 34 ◽  
Author(s):  
Grégoire Leroy ◽  
Boniface B Kayang ◽  
Issaka AK Youssao ◽  
Chia V Yapi-Gnaoré ◽  
Richard Osei-Amponsah ◽  
...  
Keyword(s):  
Gene Diversity ◽  
Central Africa ◽  
Village Chicken ◽  
North West ◽  
West And Central Africa

John William Colenso: Pioneer in the Quest for an Authentic African Christianity

1991 ◽  
Vol 44 (2) ◽  
pp. 215-236 ◽  
Author(s):  
Ephraim Mosothoane
Keyword(s):  
Central Africa ◽  
First Century ◽  
African Continent ◽  
Augustine Of Hippo ◽  
North West ◽  
African Christianity ◽  
Roman World ◽  
Clement Of Alexandria ◽  
The New Testament ◽  
West And Central Africa

There are, for purposes of this paper, two remarkable facts about Christianity on the African Continent. The first is its antiquity. There seems to be every likelihood that it was as early as its very inception that Christianity, as part of its rapid sweep across the first century Graeco-Roman world, reached Africa as well. The New Testament contains a number of hints that suggest that places such as Ethiopia, Egypt (particularly Alexandria) and Cyrene could vie with each other for first position. In any case, by the second and third centuries, the African Church could boast of such great leaders and thinkers as Clement of Alexandria, Origen, Tertullian and Cyprian; and a century later of the highly influential Augustine of Hippo. The significance and influence of these men extended well beyond Africa. After that, with the exception of Egypt and Ethiopia, there is a lacuna in our knowledge of Christianity in Africa. The next significant centuries are the fifteenth and sixteenth centuries in respect of North, West and Central Africa, and the nineteenth century in respect of virtually the entire Continent. In short, Christianity is not a newcomer to the African Continent. Ups and downs of various kinds it has experienced here as it has done elsewhere; so also, in respect of a number of areas, major gaps affecting its continuous and unbroken existence down the centuries. Nevertheless, a newcomer to the Continent it is not.

scholarly journals A Global Tropical Survey of Mid-Tropospheric Cyclones

2021 ◽  
Author(s):  
Pradeep Kushwaha ◽  
Jai Sukhatme ◽  
Ravi Nanjundiah
Keyword(s):  
Temperature Anomaly ◽  
Central Africa ◽  
Lower Troposphere ◽  
Boreal Summer ◽  
Boreal Winter ◽  
Natural Tendency ◽  
West And Central Africa ◽  
The Difference ◽  
The Tropics ◽  
Cold Core

AbstractMid-Tropospheric Cyclones (MTCs) are moist synoptic systems with distinct mid-tropospheric vorticity maxima and weak signatures in the lower troposphere. Composites and statistics of tropical MTCs are constructed and compared with monsoon lows and depressions (together, lower troposphere cyclones; LTCs). We begin with South Asia, where tracking reveals that MTCs change character during their life, i.e., their track is composed of MTC and LTC phases. The highest MTC-phase density and least motion is over the Arabian Sea, followed by the Bay of Bengal and the South China Sea. An MTC-phase composite shows an east-west tilted warm above deep cold-core temperature anomaly with maximum vorticity at 600 hPa. In contrast, the LTC-phase shows a shallow cold-core below 800 hPa and a warm upright temperature anomaly with a lower tropospheric vorticity maximum. Globally, systems with MTC-like morphology are observed over the west and central Africa, east and west Pacific in boreal summer. In boreal winter, regions that support MTCs include northern Australia, the southern Indian Ocean, and South Africa. MTC fraction is higher equatorward where there is a cross-equatorial low-level jet that advects oppositely signed vorticity. Whereas LTCs are more prevalent further poleward. Finally, a histogram of differential vorticity (the difference between middle and lower levels) versus the height of peak vorticity for cyclonic centers is shown to be bimodal. One peak, around 600 hPa, corresponds to MTCs, while the second, at approximately 900 hPa, comes from LTCs. Thus, moist cyclonic systems in the tropics have a natural tendency to reside in either the MTC or LTC category.

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