Fish Nematodes Flashcards

Question	Answer		Article
What kind of parasite are sea lice and what do they feed upon?	Sea lice are arthropod parasites which feed on blood.		Link to Article
How can female and male lice be told apart?	Females are much larger Females have a long egg sac		Link to Article
How many larval stages are there altogether and how many are parasitic?	Nine altogether. Seven are parasitic		Link to Article
Which life stages can move about on and between hosts?	Pre-adult and adult		Link to Article
Which louse is most common in Britain and what fish are affected?	C. elongatus affects salmonid fish species in the UK.		Link to Article
How do skin lesions begin and progress?	Begin as whitish spots Progress to erosions Can become open wounds Can expose underlying bone		Link to Article
What opthalmological signs can lice cause?	Erosions can lead to ulcers Cataracts Blindness		Link to Article
How do sea lice kill fish?	Anaemia and extensive skin damage cause osmoregulatory failure.		Link to Article