Abstract
The reindeer nose bot fly Cephenemyia trompe aggregates on hilltops/mountaintops to mate. Although active only for brief periods on certain days, males have been collected only from such sites. To evaluate possible suppression of the fly population by killing males (by insecticides or traps) at such sites, the density of sites and the number of males at each site were monitored in a summer grazing area of the semidomestic reindeer host (Rangifer tarandus) in Finnmark, northern Norway. In an area of ca. 20 km2, 19 mating sites were detected and examined during 4 hours on one day. The number of males observed at most sites was 5-16 (range 3-60). Minor hilltops had few males but at some sites >20-60 flies were dispersed over an area of at least 100 m2. It is concluded that mating sites in the study area are too numerous, and also used by many beneficial non-target species, to be practical targets for control of the species.
Highlights
The reindeer nose bot fly Cephenemyia trompe (Modeer) is an obligate endoparasite of reindeer and caribou (Rangifer tarandus L.) (Bergman, 1917; Hadwen, 1926; Breyev, 1958; Wood, 1987)
Reindeer are terrified by attacking adult flies (Espmark, 1968), which are responsible for harassment and disturbances during the summer grazing period
Because our survey for C. trompe males covered only 20 k m 2 within a 65 k m 2 area, we believe that males were present at several other higher elevation hilltops that we could not visit
Summary
The reindeer nose bot fly Cephenemyia trompe (Modeer) is an obligate endoparasite of reindeer and caribou (Rangifer tarandus L.) (Bergman, 1917; Hadwen, 1926; Breyev, 1958; Wood, 1987). In reindeer husbandry in northern Fennoscandia, C. trompe and the reindeer warble fly Hypoderma {=0edemagena) tarandi L . Prophylactic methods have been proposed (Hadwen, 1926; Palmer, 1934; Hearle, 1938; Saveljev, 1968; Washburn et al, 1980; Folstad et al, 1991) and antiparasitic treatments are common (Nordkvist, 1967, 1972, 1980, 1984; Nordkvist et al, 1983, 1984; Persen et al, 1982; Soveri et al, 1990; Oksanen et al, 1992, 1993; Haugerud et al, 1993). For effective use of both kinds of control, knowledge about the biology and ecology of the species is crucial
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
