Anopheles species composition and entomological parameters in malaria endemic localities of North West Colombia

Acta Tropica ◽  
2019 ◽  
Vol 190 ◽  
pp. 13-21 ◽  
Author(s):  
Nelson Naranjo-Díaz ◽  
Mariano Altamiranda-Saavedra ◽  
Margarita M. Correa
Keyword(s):  
Species Composition ◽  
Anopheles Species ◽  
North West

scholarly journals A survey of Anopheles species composition and insecticide resistance on the island of Bubaque, Bijagos Archipelago, Guinea-Bissau

2020 ◽  
Vol 19 (1) ◽  
Author(s):  
Thomas Ant ◽  
Erin Foley ◽  
Scott Tytheridge ◽  
Colin Johnston ◽  
Adriana Goncalves ◽  
...  
Keyword(s):  
Species Composition ◽  
Insecticide Resistance ◽  
Anopheles Species ◽  
Guinea Bissau

Anopheles species composition and some climatic factors that influence their survival and population abundance in Anambra East LGA, Anambra State, Nigeria

2020 ◽  
Vol 41 (2) ◽  
Author(s):  
C.M Egbuche ◽  
A.E Onyido ◽  
P.U Umeanaeto ◽  
E.N Nwankwo ◽  
I.F Omah ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Species Composition ◽  
Climatic Factors ◽  
Seasonal Abundance ◽  
Human Landing Catch ◽  
Morphological Identification ◽  
Climatic Data ◽  
Anopheles Species ◽  
Anambra State ◽  
Anopheles Mosquitoes

Malaria parasites are transmitted in nature through the bites of female Anopheles mosquitoes. However, the vector distribution varies in time and space. This study aimed to determine the species composition, abundance and climatic factors influencing Anopheles mosquitoes in Anambra East Local Government Area of Anambra State, Nigeria from October 2016 to September 2017. Adult Anopheles mosquitoes were collected from indoor and outdoor locations using Pyrethrum Knockdown Collection (PKC) and Human Landing Catch (HLC) Methods respectively. Anopheles mosquito larvae were collected using dipping method. Morphological identification of Anopheles species was carried out using standard identification keys. Climatic data was obtained from Nigerian Meteorological Agency Office in Anambra State. A total of 8181 female Anopheles mosquitoes which comprised 4127 (50.4%) larvae and 4054 (49.6%) adults were collected (P > 0.05) in the study. Four Anopheles species: An. gambiae s. l (70.1%), An. funestus group (18.2%), An. moucheti (6.3%) and An. nili (5.4%) were identified (P < 0.05). In the study area, 2608 (31.9%), 3025 (37.0%) and 2548 (31.1%) Anopheles mosquitoes were collected from Aguleri, Igbariam and Nsugbe respectively; with 100% species overlap. In each selected selected town, the Simpson’s index of diversity was ~2 and Shannon-wiener diversity was ~1. Only An. gambiaes l showed varied seasonal abundance with wet season contributing 67.9% and dry season 32.1% of the overall An. gambiaes. l collection (P < 0.05). The correlation between rainfall and An. gambiae s. l. abundance was significantly strong (r = 0.66; P < 0.05). No significant correlation was found between Anopheles species abundance and temperature as well as relative humidity. The study revealed the preponderance of four Anopheles species: An. gambiae s. l., An. funestus, An. moucheti and An. nili; and rainfall is the only climatic factor that causes temporal change in the abundance of one of the species, An. gambiaes. l. in the study area. Keywords: Anopheles mosquitoes, abundance, temperature, rainfall, relative humidity

Morphological Identification, Species Composition and Distribution of Mosquitoes in Kosti region, White Nile State, Central Sudan

2019 ◽  
Vol 6 (1) ◽  
pp. 7-18
Author(s):  
Mai M. Nour ◽  
Mariam Atta Elmannan Aboud ◽  
Nahla Osman Mohamed Ali
Keyword(s):  
Species Composition ◽  
Morphological Identification ◽  
Correct Identification ◽  
Anopheles Species ◽  
Mosquito Abundance ◽  
Central Sudan ◽  
Global Positioning ◽  
White Nile ◽  
Species Composition And Distribution ◽  
Vector Control Strategy

Mosquitoes are a large diverse group of insects, with members being most important as vectors of diseases. The correct identification of mosquitoes is crucial to the control of the mosquito-borne diseases. This study was designed to provide baseline data on the species composition and distribution of members of the Anophelines and Culicines genera in ten selected localities in Kosti region, White Nile State, Central Sudan. Global Positioning System (GPS) was used to select collection sites. Adult mosquitoes were collected by pyrethrum spray catch (PSC) from randomly selected houses in Allia, Alnsr, Alskahdeed, Almrabie, Alshati, Althwrat, Alraba, Block 26, Block 32 and Khadugli in Kosti region during September 2014-August 2015. The Anophelines and Culicines mosquitoes were identified using standard morphological keys. Two Anopheles species and three Culex species were morphologically identified. These were An. gambiae s.s.; An. pharoensis; Cx. quinquefasciatus; Cx. univittatus and Cx. pipiens. This is the first report of An. pharoensis in the study area. The Highest mosquito abundance was observed in the September followed by October, while the lowest mosquito abundance was in July. An. gambiae s.s and Cx. quinquefasciatus were the predominant species which has importance as they indicate the presence of Malaria and arboviral infections in the study areas; respectively. These findings are of importance in the planning and implementation of vector control strategy in the Kosti region, White Nile state.  

Coincident changes in four components of the North Sea ecosystem

1999 ◽  
Vol 79 (1) ◽  
pp. 183-185 ◽  
Author(s):  
K.F. Pearce ◽  
C.L.J. Frid
Keyword(s):  
Time Series ◽  
Species Composition ◽  
North Sea ◽  
Food Chain ◽  
Demersal Fish ◽  
North West ◽  
The North ◽  
The North Sea ◽  
Chain Links ◽  
Single Set

An analysis of species composition of the zooplankton, macrobenthos (two stations) and demersal fish from Northumberland (north-west North Sea) are reported. The four time-series show synchronous changes in species composition. While some of these changes coincide with changes in climateological variables, others do not. The degree of synchrony implies that either all the time-series are responding to a single set of extraneous forcing factors, or that food chain links, rapidly translate the signal through all ecosystem components.

scholarly journals Impact of sugarcane irrigation on malaria vector Anopheles mosquito fauna, abundance and seasonality in Arjo-Didessa, Ethiopia

2020 ◽  
Author(s):  
Assalif Demissew Shifera ◽  
Dawit Hawaria ◽  
Solomon Kibret ◽  
Abebe Animut ◽  
Arega Tsegaye ◽  
...  
Keyword(s):  
Species Composition ◽  
Malaria Vector ◽  
Mosquito Species ◽  
Malaria Vectors ◽  
Anopheline Mosquito ◽  
Chi Square ◽  
Anopheles Species ◽  
Mosquito Abundance ◽  
Anopheles Mosquitoes ◽  
The Impact

Abstract Background: Although irrigation activities are increasing in Ethiopia, limited studies evaluated their impact on malaria vector mosquito composition, abundance and seasonality. This study aimed at evaluating the impact of sugarcane irrigation on species composition, abundance and seasonality of malaria vectors. Methods : Adult Anopheles mosquitoes were collected using CDC light traps from three irrigated and three non-irrigated clusters in and around Arjo-Didessa sugarcane irrigation scheme in southwestern Ethiopia. Mosquito collections were conducted in four seasons: two wet and two dry, in 2018 and 2019. Mosquito species composition, abundance and seasonality were compared between irrigated and non-irrigated clusters. Anopheles mosquitoes were identified to species using morphological keys and An. gambiae s.l to sibling species using PCR. Chi-square was used to analyze the association between Anopheles species occurrence and environmental and seasonal parameters. Results: Overall, 2,108 female Anopheles mosquitoes comprising of six species were collected. Of these, 92.7% (n=1954) were from irrigated clusters and 7.3% (n=154) from the non-irrigated. An. gambiae s.l was the most abundant (67.3%) followed by An. coustani complex (25.3 %) and An. pharoensis (5.7%). PCR based identification revealed that 74.7% (n=168) of the An. gambiae s.l were An. arabiensis and 22.7% (n=51) An. amharicus . Density of An. gambiae s.l. (both indoor and outdoor) was higher in irrigated than non-irrigated clusters. The overall anopheline mosquito abundance during the wet seasons (87.2%; n=1837) was higher than the dry seasons (12.8%; n=271). Conclusion : The ongoing sugarcane irrigation activities in Arjo-Didessa created conditions suitable for increased malaria transmitting Anopheles species diversity and abundance. This in turn could drive malaria transmission in Arjo-Didessa and its environs in both dry and wet seasons. Thus, currently practiced malaria vector interventions need to be strengthened and consider larval source management to reduce vector abundance in the irrigated areas. Key Words: Malaria, Irrigation, Anopheles mosquitoes, vector density, An. amharicus , Ethiopia

Anopheles Species Composition and Breeding Habitat Characterisation in Chiredzi District, Zimbabwe

2020 ◽  
Vol 28 (1) ◽  
pp. 84 ◽  
Author(s):  
M.P. Zengenene ◽  
W. Soko ◽  
B.D. Brooke ◽  
L.L. Koekemoer ◽  
J. Govere ◽  
...  
Keyword(s):  
Species Composition ◽  
Breeding Habitat ◽  
Anopheles Species ◽  
Habitat Characterisation

Phytosociological description of norite koppies in the Rustenburg area, North-West Province and refinement of the distribution of the Norite Koppies Bushveld on the national vegetation classification map of South Africa

Bothalia ◽  
2011 ◽  
Vol 41 (2) ◽  
pp. 327-339
Author(s):  
A. J. H. Lamprecht ◽  
S. S. Cilliers ◽  
A. R. Götze ◽  
M. J. Du Toit
Keyword(s):  
Species Composition ◽  
Vegetation Type ◽  
Mining Area ◽  
Multivariate Statistical ◽  
North West ◽  
The North ◽  
North West Province ◽  
Platinum Mining ◽  
Area North ◽  
Surrounding Areas

The Norite Koppies Bushveld vegetation type boasts a distinctive and contrasting topography and species composition easily distinguished from that of surrounding areas. A phytosociological study was done on the leased mining area of the Impala Platinum Mining Company north of Rustenburg in the North-West Province. Similar norite koppies, situated west of the Norite Koppies Bushveld vegetation, and not yet mapped by Mucina Rutherford (2006), were identified in the study area and phytosociologically described. Six plant communities and two subcommunities were identified. Multivariate statistical analyses (correspondence analyses) confirmed that the species composition of these areas corresponds with and does therefore form part of the Norite Koppies Bushveld vegetation type as described by Mucina Rutherford (2006). Some of these communities contain Boscia albitrunca, a protected plant species, and should therefore be considered as areas with conservation value.

scholarly journals Vegetation of the clinics of the Dr Kenneth Kaunda District Municipality, North West Province

2012 ◽  
Vol 31 (1) ◽  
Author(s):  
C. Pretorius ◽  
E. Prinsloo ◽  
L. Powrie ◽  
M. Theunissen ◽  
Sarel S. Cilliers
Keyword(s):  
Ecosystem Services ◽  
Species Composition ◽  
Plant Species ◽  
Social Aspects ◽  
Plant Species Composition ◽  
North West ◽  
North West Province

In this study 26 clinic gardens were studied in terms of plant species composition,richness and ecosystem services. Management and other social aspects of these gardens werealso investigated.

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