Gordeev I.I. 2015. Prevalence, geographical distribution and host specificity of parasitic copepode Lophoura szidati Stadler, 1978 (Copepoda: Sphyriidae) on grenadiers (Macrourus spp.) in the Antarctic // Invertebrate Zoology. Vol.12. No.2: 207–212 [in English].
Russian Federal Research Institute of Fisheries and Oceanography (VNIRO), Verkhnaya Kras- noselskaya Str. 17, Moscow 107140, Russia. E-mail: email@example.com
ABSTRACT: A total of 5948 specimens of Macrourus whitsoni Regan, 1913, 142 M. holotrachys Gьnther, 1878 and also three M. caml McMillan, Iwamoto, Stewart et Smith, 2012 from Antarctic deep waters were examined for the presence of a mesoparasite, Lophoura szidati Stadler, 1978. All specimens were collected during four Antarctic summers (December-March) in seasons 2010–2013 and 2014–2015 as by-catch during fishing for Antarctic toothfish Dissostichus mawsoni Norman, 1937 at a depth from 586 to 2300 m in the Pacific, Indian and Atlantic sectors of the Antarctic. Considering that seasonal variability in the prevalence of parasites may be caused by differences in selectivity and efficiency of fishing gears, it can be concluded that upon circumpolar distribution of L. szidati its mean prevalence on M. whitsoni reaches 10–12% and higher in the Pacific sector of the Antarctic. M. caml is recorded as a host of L. szidati for the first time.
KEY WORDS: Lophoura szidati, Macrourus whitsoni, Antarctic.