Dailey and Vogelbein: Parasite fauna as stock indicators of Antarctic whales 



359 



distinct species, Tetrabothrius urilsoni (Leiper et Atkin- 

 son, 1914) and T. affinis (Lonnberg, 1891; Lonnberg, 

 1892), and one form (Tetrabothrius sp.) that appears 

 to fall between the two, comprised this tapeworm 

 material (Table 1). 



Helminth diversity appeared to be greater in the 

 Tasman Sea (Sector V) animals than in whales cap- 

 tured on the open Pacific- Antarctic Ocean (Sectors I, 

 VI) (Tables 2 and 5). Seven different helminths infected 

 the sample of 10 sei whales from the Tasman Sea 

 region of sector V. Only four helminths infected 13 

 whales from Pacific sector VI, while 12 whales from 

 sector I were infected with only three species. The 

 cestode Diplogonoporus balaenopterae Lonnberg, 1892 

 illustrates one disparity. This cestode infected 40% 

 (Table 2) of the Tasman Sea sample yet it was absent 

 in the other sectors. Likewise, the cestode Priapo- 

 cephalus grandis Nybelin, 1922 and one nematode, 

 Anisakis simplex Rudolphi, 1809, are seen only in sec- 

 tor V. Tetrabothrius affinis was found in sectors V 

 and VI, and T. wilsoni, Bolbosoma turbinella, and 



Figure 2 



Location of 35 sei whale catches and number of helminth 

 species found in IWC sectors I, IV, V, and VI. Circles indicate 

 site of capture; circle size indicates relative number examined. 

 Numbers in brackets are number of helminth species; N = 

 number of whales examined. 



