Studies of the sampling of <i>Glossina pallidipes</i> Aust. I.—The numbers caught daily on cattle, in Morris traps and on a fly-round

Smith, Issar; Rennison, B. D.

doi:10.1017/s0007485300055334

Cited by 18 publications

(13 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 to permit re-analysis of the data to include lj-hour catching periods. The results already described (Smith & Rennison, 1961) were confirmed. In addition, the data indicate that the flies did not come to the tethered cattle and to the Morris traps randomly throughout the day (P<t)-001, for both replicates).…”

supporting

confidence: 79%

See 1 more Smart Citation

Studies of the sampling ofGlossina pallidipesAust.—II. The daily pattern of flies caught on cattle, in Morris traps and on A fly-round

Smith¹,

Rennison²

1961

Bull. Entomol. Res.

Self Cite

View full text Add to dashboard Cite

The first paper of this series (Smith & Rennison, 1961) compared the numbers of non-teneral individuals of Glossina pallidipes Aust. caught, on successive days in two experiments, by the use of tethered oxen, Morris traps and the standard fly-round technique. Only the total numbers of male and female flies were considered in that paper, although the catches were recorded for every 1^-hour period between 0800 and 1830 hr. (East African Standard Time); the present paper details the daily patterns of the catches. Materials and methods.The experimental area at Lugala, Uganda, the design of the experiments, the times they were carried out, the methods of catching and the personnel employed were described in the first paper of this series. For the comparisons described below the numbers of flies caught by each attractant per 1^-hour period (w) were transformed to log(w + l) (Williams, 1937). When a pair of traps was regarded as a single attractant the sum of the catches in the two traps was transformed, but where mean catches of traps of different colours was under consideration the number of flies taken in each trap of the pair was separately transformed. Wetand dry-bulb readings were taken with a whirling psychrometer every 1£ hours from 0800 to 1830 hr. during each experiment; moving averages of the temperature and saturation deficit were calculated from them. Results and discussion. The daily pattern of catches.Enough flies were caught in both replicates of Expt. 1 to permit re-analysis of the data to include lj-hour catching periods. The results already described (Smith & Rennison, 1961) were confirmed. In addition, the data indicate that the flies did not come to the tethered cattle and to the Morris traps randomly throughout the day (P

show abstract

supporting

confidence: 79%

“…

…”

mentioning

confidence: 99%

Studies of the sampling ofGlossina pallidipesAust.—II. The daily pattern of flies caught on cattle, in Morris traps and on A fly-round

Smith¹,

Rennison²

1961

Bull. Entomol. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

“…A particular host species, with high population density, in a tsetse habitat may cause more flies to feed on it. BARRAS (1960BARRAS ( , 1970, MORRIS (1960), HARLEY (1963), SMITH and RENNISON (1961) and SAUNDERS (1964) showed that tsetse are attracted to dark colours, while FULLER and MOSSOP (1929) noted the attractiveness of shaded cavities which are mistaken for the belly of an animal. WEITZ (1963), on examination by immunological methods of 22,640 blood-meal squashes from 15 Glossina species in East Africa, concluded that each species has its characteristic behaviour not dependent on availability of the different hosts and further suggested that feeding habits are genetically determined.…”

Section: Host Selection and Feeding Patternmentioning

confidence: 99%

Mechanism of host selection by tsetse flies

Onyiah

1980

Int. J. Trop. Insect Sci.

View full text Add to dashboard Cite

Mobility of tsetse flies is influenced by various factors including the search for a blood-meal. Field observations on the feeding behaviour of tsetse are difficult. The use of bait animals for experimental purposes may indicate food sources but not host selection under natural conditions. Availability and density of a particular potential host species in a tsetse habitat can influence the feeding habit of the latter. Flies are capable of adapting to new host species in the absence of the usual ones. Host selection might be due principally to availability of host(s) and not based on true preference. Tsetse flies respond to visual stimuli from moving objects. Their shape, colour and size are important factors eliciting visual response. Whether these factors are distinguished separately or in combinations is not clear. Odour emanating from live hosts causes up-wind olfactory response towards the source(s), resulting in actual landing on test targets even when the hosts are out of sight. The components of odour have not been isolated. It is therefore doubtful if host selection can be associated with odour, as this might imply that tsetse can differentiate the odours of the different potential hosts. The difficulties in ascertaining true host selection by tsetse are discussed to stimulate further investigations.

show abstract

“…Trap catches, however, reflect only apparent and not absolute densities, and are reliable only if sample sizes are quite large (Williams et al, 1990a). Trap catches are prone to many biases and, hence, fluctuate in space and time (Morris & Morris, 1949;Glasgow & Duffy, 1961;Smith & Rennison, 1961;Hargrove & Vale, 1978;Dransfield, 1984;Brightwell *Correspondence Fax: 254 2 803360 E-mail: icipe@cgnet.com et al, 1987;Williams et al, 1990a). More importantly, the two factors, space and time, may interact significantly thereby confounding the main effects of the factors.…”

Section: Introductionmentioning

confidence: 99%

The magnitude of site and time interaction effect in tsetse fly (Diptera: Glossinidae) trap catches

Odulaja

Mihok

Abu-Zinid

1998

Bull. Entomol. Res.

View full text Add to dashboard Cite

Site and time effects are important factors determining trap catches of tsetse flies. These factors may interact significantly and therefore confound interpretation of time series data used for population monitoring. We therefore investigated the magnitude and importance of site x time interactions in trap catches of Glossina pallidipes Austen and G. longipennis Corti using a 2200 trap-days (400 trap-months) data set. The interaction was found to be significant (P < 0.05) in 46-100% of the combinations of different numbers of months and sites between 2 and 12. The mean percent variance due to the interaction ranged between 4% and 28% for G. pallidipes and 12% and 36% for G. longipennis. The interaction was usually less important than the effect of site alone but more important than the effect of time alone. These results suggest that tsetse researchers should examine critically the adequacy of existing approaches to population monitoring with traps and to testing new traps and odour baits.

show abstract

Studies of the sampling of Glossina pallidipes Aust. I.—The numbers caught daily on cattle, in Morris traps and on a fly-round

Cited by 18 publications

References 16 publications

Studies of the sampling ofGlossina pallidipesAust.—II. The daily pattern of flies caught on cattle, in Morris traps and on A fly-round

Studies of the sampling ofGlossina pallidipesAust.—II. The daily pattern of flies caught on cattle, in Morris traps and on A fly-round

Mechanism of host selection by tsetse flies

The magnitude of site and time interaction effect in tsetse fly (Diptera: Glossinidae) trap catches

Contact Info

Product

Resources

About