Fróðskaparrit - 01.01.2002, Page 116

1 14 MYXIDIUM GADl (GEORGEVITCH, 1916) AND MYXIDIUM OVIFORME (PARISI, 1912)
1N THE GALL BLADDERS OF COD (GADUS MORHUA L.)
using these parasites as indicators is, that
their lifecycle is poorly understood. Their
greatest advantage is that they are highly
tissue specifíc, and are believed to stay in
the fish for several years.
Sampling and species identification
The cod was caught by trawl on seven dif-
ferent stations with the fisheries research
vessel Magnus Heinason. On each station
30-38 cods were sampled. Length and
weight was measured, and otoliths and gall
bladders kept for laboratory investigations.
On one station in Nólsoyar fjord the cods
were caught with line and the gallbladders
examined for myxosporidians while still
fresh, to get correct size measurements.
In the laboratory a drop of bile was taken
from each gall bladder and examined under
the microscope at a magnitude of 400X and
in some cases 1000X. Some specimens
were mounted in DPX, and are deposited at
Table 3. A list ofall tlie parasite species fottncl in/on codfrom the Faroe Islands.
Myxozoa Myxidium oviforme Parisi (1912) This study
Myxozoa Myxidium gadi Georgevitch (1916) This study
Digenea Prosorhynclwides graciliscens (Kudolphi, 1819)
Stunkard (1976) Køie (2000; 1984)
Prosorhynchus squamatus Odhner (1905) Køie (2000; 1984)
Podocotyle reflexa (Creplin, 1825) Odhner (1905) Køie (2000; 1984)
Lepidapedon elongatum (Lehour, 1908) Nicoll (1910) Køic (2000; 1984)
Lepidapedon rachion (Cohhold, 1858) Stafford (1904) Køie (2000; 1984)
Hemiuris levinseni Odhner (1905) Køie (2000; 1984)
Lechitochirium rufoviride (Rudolphi, 1819) Luhe (1901) Køie (2000)
Derogenes sp. Køie (2000; 1984)
Nematoda Capillaria gracilis (Bellinghani, 1840) Travassos (1915) Køic (1993)
Anisakis simplex (Rudolphi, 1845) Dujardin (1845) Køie (1993); Sørensen (1988); Platt (1975)
Pseudoterranova decipiens (Krahbe, 1878) Køie (1993); Sørensen (1988);
Gibson and Colin (1982) Platt (1975)
Contracaecum osculatum (Rudolphi, 1802) Baylis (1920) Køie (1993); Sørensen (1988)
Contracaecum sp. Hysterothylacium aduncum (Rudolphi, 1803) Køie (1993); Kreiss(1952)
Deardorff and Overst (1981) Hysterothylacium rigidum (Rudolphi, 1809) Køie, (1993); Sørensen (1988)
Deardorff and Ovcrst (1981) Køie (1993)
Cucullanus cirratus Miiller (1777) Køie (1993)
Ascarophis morhua van Beneden (1871) Køie (1993)
Ascarophis crassicollis Dollfus and Campana-Rouget (1956) Køie (1993)
Achantocephala Echinorhyncus gadi Zoega in O.F. Miiller (1776) Køic (2000); Kreiss(1952)
Corynosoma sp. Køie (2000)
Copepoda Holobomolochus confusus (Stock, 1953) Vervoort (1969) Køie (2000)
Lernaeocera branchialis (Linneaus, 1767) Wilson (1917) Køie (2000); Stephenson (1929) and Iløjgaard (1998)
Clavelta adunca (Strøm, 1762) Dollfus (1953) Stephenson (1929); Køie (2000)