Íslenskar landbúnaðarrannsóknir - 01.09.1974, Blaðsíða 6

4 ÍSLENSKAR LANDBÚNAÐARRANNSÓKNIR
Protozoa:
Cestoda:
Nematoda:
Insecta:
Acarina:
Eimeria spp.
Sarcocystis sp.
Toxoplasma gondii
Coenurus cerebralis
Cysticercus tenuicollis
Echinococcus granulosus
Moniezia expansa
Bunostomum trigonocephalum
Chabertia ovina
Cooperia oncophora
Dictyocaulus filaria
Muellerius capillaris
Nematodirus filicollis
Nematodirus spathiger
Oesophagostomum venulosum
Ostertagia circumcincta
Ostertagia trifurcata
Protostrongylus rufescens
Teladorsagia davtiani
Trichostrongylus axei
Trichostrongylus capricola
Trihostrongylus vitrinus
Trichuris ovis
Damalbia ovis
Melophagus ovmus
Chorioptes ovis
Psoroptes ovis
MATERIALS AND METHODS
The study took place on the farm Gesthús
near Reykjavík. This is a small farm with
approximately 100 sheep of the native Ice-
landic breed, the only breed in Iceland.
The sheep husbandry practices on the farm
are typical for most farms in Iceland. The
winterfed sheep are usually housed from
mid-November to mid-May, but this varies
considerably depending on the weather. Dur-
ing this period the sheep are fed hay, and
if the weather is good, the sheep are let out
on the grass fields for a few hours. The
houses have slatted floors.
The main lambing period takes place
about the middle of May, and from that
time until the middle of June, the sheep and
lambs are kept on cultivated permanent
grass fields and pastures near the farm. Then
the sheep are driven to common hill and
mountain pastures of vast area, where they
are kept until late September. At that time
they are driven back to the farm again and
those lambs not intended for breeding are
slaughtered. The rest of the flock is kept
near the farm on the same pastures as in the
early summer, until they are housed in Nov-
ember.
In all, 36 sheep were used for this study
during the period November 1971 — June
1973.
From November 1971 — December 1972,
faecal samples from 10 lambs (born May
1971) and 10 adult sheep (older than 2
years) were studied. The lambs had never
been given anthelmintica but the adults were
treated with thiabendazole in the spring of
1971. This experimental flock was divided
into the following groups:
Group 1
3 female lambs
1 male lamb
3 adult ewes
1 adult ram
No anthelmintica
Group II
3 female lambs
1 male lamb
3 adult ewes
1 adult ram
Thiabendazole 3g
December 8, 1971
Group III
2 female lambs
2 adult ewes
Thiabendazole 3g
December 8, 1971
April 4, 1972
From September to December 1972 faecal
samples from 6 lambs (born May 1972)
were studied. The lambs had never been