scholarly journals Conservation of the West African Black-Crowned Crane Balearica pavonina pavonina (Linn 1758) in the Sudano-Sahelian Wetlands of Northern Nigeria

Author(s):  
Daniel Ibiang Edet
2006 ◽  
Vol 77 (1) ◽  
pp. 9-20 ◽  
Author(s):  
Khady Diouf ◽  
Jacques Panfili ◽  
Maylis Labonne ◽  
Catherine Aliaume ◽  
Javier Tomás ◽  
...  

Toxins ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 302
Author(s):  
Taline D. Kazandjian ◽  
Arif Arrahman ◽  
Kristina B. M. Still ◽  
Govert W. Somsen ◽  
Freek J. Vonk ◽  
...  

Bites from elapid snakes typically result in neurotoxic symptoms in snakebite victims. Neurotoxins are, therefore, often the focus of research relating to understanding the pathogenesis of elapid bites. However, recent evidence suggests that some elapid snake venoms contain anticoagulant toxins which may help neurotoxic components spread more rapidly. This study examines the effects of venom from the West African black-necked spitting cobra (Naja nigricollis) on blood coagulation and identifies potential coagulopathic toxins. An integrated RPLC-MS methodology, coupled with nanofractionation, was first used to separate venom components, followed by MS, proteomics and coagulopathic bioassays. Coagulation assays were performed on both crude and nanofractionated N. nigricollis venom toxins as well as PLA2s and 3FTx purified from the venom. Assays were then repeated with the addition of either the phospholipase A2 inhibitor varespladib or the snake venom metalloproteinase inhibitor marimastat to assess whether either toxin inhibitor is capable of neutralizing coagulopathic venom activity. Subsequent proteomic analysis was performed on nanofractionated bioactive venom toxins using tryptic digestion followed by nanoLC-MS/MS measurements, which were then identified using Swiss-Prot and species-specific database searches. Varespladib, but not marimastat, was found to significantly reduce the anticoagulant activity of N. nigricollis venom and MS and proteomics analyses confirmed that the anticoagulant venom components mostly consisted of PLA2 proteins. We, therefore, conclude that PLA2s are the most likely candidates responsible for anticoagulant effects stimulated by N. nigricollis venom.


1955 ◽  
Vol 46 (1) ◽  
pp. 111-112 ◽  
Author(s):  
T. A. M. Nash

Syntomosphyrum glossinae Wtstn., a Chalcid parasite of the pupae of tsetse flies in East and West Africa, is recorded parasitising the oöthecae of Periplaneta americana (L.) at the West African Institute for Trypanosomiasis Research, Kaduna, Northern Nigeria.


Africa ◽  
1963 ◽  
Vol 33 (1) ◽  
pp. 25-44
Author(s):  
A. H. M. Kirk-Greene

Opening ParagraphHausa is probably the most widely spoken language in Negro Africa. Besides being generally spoken throughout Northern Nigeria, its motherland, Hausa is, as Westermann and Bryan note, widely understood in other West African countries. They cite colonies of Hausa-speakers in Dahomey, Togo, Ghana, Cameroons, Chad, and ‘many of the greater centres in North Africa’. They could also usefully have mentioned the Sudan, where pilgrims from Northern Nigeria have settled in their tens of thousands. Indeed, it is often said that you will find Hausa-speakers from Dakar to Port Sudan, from Leopoldville to Fez. The explorer Heinrich Barth in the 1840's had his first Hausa lesson in Tunis, and fifty years later it was to Tripoli that Bishop Tugwell of the Church Missionary Society and his pioneer team of five went to study Hausa before undertaking their bold missionary thrust into the emirates. Westermann and Bryan point out that the total number of Hausa-speakers cannot be estimated in view of the enormous distribution of the Hausa and the great number of those who speak Hausa as their second language. Few of us would disagree with Cust's judgement that Hausa ‘has obtained the rank of a lingua franca and is the general vehicle of communication between the peoples speaking different languages’. Counting those who have recourse to Hausa as their second or vehicular language, it would be no exaggeration to claim that some 20 million persons ‘hear’ Hausa, as the West African languages so picturesquely express it.


2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Clovis Bessong Tanyi ◽  
Raymond Ndip Nkongho ◽  
Justin Nambangia Okolle ◽  
Aaron Suh Tening ◽  
Christopher Ngosong

African farmers are currently grappling with potential control measures for the invasive fall armyworm (FAW) (Spodoptera frugiperda), which has recently emerged as an important economic pest that is ravaging maize fields across the continent. We evaluated the efficacy of the West African black pepper extract and beans intercropping systems as viable FAW control measures and the implication on maize yields. The experiment comprised five treatments (control-no input, dwarf beans intercrop, climbing beans intercrop, West African black pepper extract, and insecticide) with three replications each. FAW severity was assessed at three to seven weeks after planting (WAP), while maize infestation was assessed at seven WAP. FAW severity increased significantly (P<0.05) across WAP for the control and dwarf beans intercrop, with the highest at four and six WAP, respectively. FAW severity also differed (P<0.05) significantly across treatments at four to seven WAP, with the lowest recorded in the extract of West African black pepper (Piper guineense) and the highest in control treatments. Maize infestation ranged from 13 to 93%, with the lowest in the West African black pepper extract and synthetic insecticide, followed by both dwarf and climbing beans intercrops and then the control. The maize yield determined at physiological maturity ranged from 2.2 to 6.3 t ha−1 across treatments and differed significantly, with the highest in the West African black pepper extract and synthetic insecticide, followed by both the dwarf and climbing beans intercrops, as compared to the control. Overall, the West African black pepper extract and beans push cropping systems demonstrated efficacy as viable sustainable alternative control measures for the invasive fall armyworm in maize fields.


1989 ◽  
Vol 6 (4) ◽  
pp. 427-431 ◽  
Author(s):  
M.A. Gulma ◽  
S.L. Lorenzo ◽  
J.O. Falaiye

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