Temperature and Moisture Content of Soils of Termite Mounds and Animal Burrows in Relation to Relative Abundance of Adult Phlebotomine Sandflies (Diptera: Psychodidae) in Marigat Semiarid Area, Baringo District, Kenya

1990 ◽  
Vol 19 (3) ◽  
pp. 486-489 ◽  
Author(s):  
Mulenda Basimike ◽  
Mutuku J. Mutinga
1987 ◽  
Vol 82 (1) ◽  
pp. 119-124 ◽  
Author(s):  
M. Dora Feliciangeli

A study on the ecology of phlebotomine sandfly fauna in a restricted focus of cutaneous leishmaniasis in northern Venezuela was undertaken in order to investigate the species responsible for the transmission. The study area and catching methods for phlebotomine sandflies are described. A total of 9,061 females and 1,662 males were collected during a year-term study. 12 species of Lutzomya and 1 species of Brumptomya sp. were identified. Absolute and relative abundance and ocurrence for each species were determined. The rel ative occurrence allowed to distinguish the common species, viz. L. panamensis, L. ovallesi, L. gomezi, L. tinidadensis, L. atroclavata, L. cayennensis, L. shannoni and L. olmeca bicolor from the rare species vis., L. punctigeniculata, L. rangeliana, L. evansi and L. dubitans. General comments on the species composition of the sandfly fauna in this locality are made.


2020 ◽  
Vol 4 (2) ◽  
pp. 92-100
Author(s):  
Akaninyene U. Akpan ◽  
C. C. Ojianwuna ◽  
P. M. E. Ubulom ◽  
C. A. Yaro ◽  
D. E. Oboho

Termites are generally regarded as pests, although they have some beneficial roles to play in the ecosystem, particularly in the soil. This study was conducted between January 2018 and April 2018, to determine the effect of physico-chemical parametrs on abundance and diversity of termites and other arthropods in termite mounds in Uinversity of Uyo Community. Soil samples were randomly collected from six termite mounds from two sites for physiochemical parameters analysis and these were temperature, pH, moisture content, nitrogen, phosphorus, magnesium, copper, sodium, potassium, manganese and iron.. The termites and other arthropods were preserved in 70% ethanol. Temperature and moisture content, copper, sodium and iron were significant.  The results revealed that the physicochemical parameters affected the termite species abundance as station 1 (539) had relatively more of the termite species than station 2 (551), and also affected the diversity of the termites as station 1 (0.89) had relatively more diversity of the termites than station 2 (0.66). Also from the results, station 1 (2.06) had relatively more diversity of the other arthropod species identified in the study area than station 2 (1.59). Macrotermes bellicosus and Odontermes badius termite species were identified. Musca domestica, Anopheles gambiae, Lasius sp, Archispirostreptus sp, Camponotus sp, Missulena sp, Chorthippus sp, Acheta sp and Blatta orientalis were the other arthropods collected and identified. Macrotermes bellicosus (59.93 %; 63.52 %) was the most abundance and dorminant of the termite species identified in the study areas. Lasius sp (45; 25.93 %) 


1974 ◽  
Vol 64 (4) ◽  
pp. 605-619 ◽  
Author(s):  
M. A. Peirce

AbstractIn a survey of animal burrows in nine East African game areas or ranches 112621 specimens of Ornithodoros moubata pordnus Walton, vector of African Swine Fever Virus (ASFV), were collected from 172 burrows (out of 442 examined) in six areas. Burrows were usually located in open ground, in patches of scrub thicket and frequently in termite mounds; often the burrows had been excavated originally by antbear. Ticks were obtained by means of a lure, by chipping samples from the burrow walls and by taking soil samples from the burrow floors. Tick populations ranged from a few individuals to 250000 per burrow, second- and third-stage nymphae accounting for over 70% of the total population. Generally, ticks were found near the entrances of burrows on the floor, or on the roofs if the burrows had been unoccupied for some time, the latter position appearing to be a hunger response. Factors favouring large tick populations were neutral soils, high relative humidity, optimal temperature to be found at 3000–5000 ft above sea level, vegetation surrounding the burrow and the presence of burrow-inhabiting animals. Above 5000 ft O. m. porcinus was less common, and above 6150 ft none was found. Blood-meal identifications have shown warthog to be the primary host; other hosts included antbear, porcupine and hyaena. In areas with a particularly favourable environment the ticks can remain quiescent for long periods; in less favourable areas the continued maintenance of colonies is dependent upon the frequency with which ticks can feed on a suitable host. Some predation of adult ticks occurs but losses due to bush fires are not important. Heavy infestations of ticks may contribute to the mortality of young warthogs. The survey confirms experimental evidence that ASFV is well adapted to maintenance in the vector population.


Nature ◽  
2017 ◽  
Vol 546 (7659) ◽  
pp. 455-455
Keyword(s):  

1968 ◽  
Vol 19 (03/04) ◽  
pp. 423-429 ◽  
Author(s):  
G. M Thelin ◽  

SummaryA stable, lyophilized AHF reference plasma has been prepared from pooled plasma from at least 50 normal healthy donors and standardized against a primary standard of fresh plasma from 20 healthy male donors aged 20 to 40. Average AHF potency of a typical lot is 98.8%, and moisture content is less than 0.5%. Under storage at -25° C, this AHF reference plasma is stable for at least 18 months. It has been used in several major coagulation laboratories, and has given consistently satisfactory and reproducible results in AHF assays.


TAPPI Journal ◽  
2013 ◽  
Vol 12 (11) ◽  
pp. 21-26 ◽  
Author(s):  
CHAO TIAN ◽  
LINQIANG ZHENG ◽  
QINGXIAN MIAO ◽  
CHRIS NASH ◽  
CHUNYU CAO ◽  
...  

The Fock test is widely used for assessing the reactivity of dissolving pulp. The objective of this study was to modify the method to improve the repeatability of the test. Various parameters that affect the repeatability of the Fock test were investigated. The results showed that Fock reactivity is dependent on testing conditions affecting the xanthation between cellulose and carbon disulfide, such as the moisture content of the pulp sample, sodium hydroxide (NaOH) concentration, xanthation temperature, carbon disulfide dosage, and xanthation time. The repeatability of the test was significantly improved using the following modified testing procedure: air dried sample in the constant temperature/humidity room, xanthation temperature of 66°F (19°C) in a water bath, xanthation time of 3 h, NaOH concentration of 9% (w/w), and 1.3 mL carbon disulfide.


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