A) Tapeworm B) Sea lice C) Salmon fluke D) Leech
A) 1990 B) 2002 C) 1972 D) 1984
A) Virus B) Bacterium C) Monogenean parasite D) Copepod
A) 1995 B) 1972 C) 2002 D) 1984
A) Viral B) Parasitic C) Bacterial D) Fungal
A) Use of antibiotics B) Vaccination of remaining fish C) Total eradication of the entire fish stock D) Isolation of infected individuals
A) Dark patches on the skin B) Swollen fins C) Pale gills D) Excessive mucus production
A) They have a different cell membrane B) They are larger C) They contain DNA D) They are not part of the immune system
A) Hiding at the bottom of the tank B) Gulping for air near the water surface C) Aggressive swimming D) Refusing to move at all
A) Increased water temperature B) Adding iodine to the water C) Selective breeding for size D) Developing a vaccine
A) Natural predation on weakened individuals B) Constant movement of the fish C) The high salt content of the ocean D) Low fish population density
A) Lack of sunlight B) The use of artificial feed C) Crowded net pens D) Cold water temperatures
A) Rainbow trout B) Wild pink salmon C) Arctic char D) Atlantic salmon
A) Antibiotics and pesticides B) Probiotics C) Herbal supplements D) Natural oils
A) Migratory behavior B) Uniform body size C) High biodiversity D) Low parasite resistance
A) Myxosporidia B) Nematodes C) Platyhelminthes D) Crustaceans
A) Isopods B) Leeches C) Monogeneans D) Nematodes
A) They have several hosts B) They do not require a host to reproduce C) They are free-living in the ocean D) They only infect one host species
A) About thirty B) About ten C) About five D) About fifty
A) Co-extinction B) Migration to different reefs C) Adaptation to new hosts D) Rapid multiplication
A) Caligus clemensi B) Lepeophtheirus salmonis C) Henneguya salminicola D) Pfiesteria piscicida
A) Organically polluted land runoff B) Cooler ocean temperatures C) Increased salinity levels D) Decreased fish population density
A) Digestive enzymes B) Neurotoxin C) Adhesive mucus D) A paralyzing pheromone
A) On the external skin B) In the gills only C) In the blood stream D) In the flesh
A) By shedding the affected skin B) By walling off the infection into cysts C) By producing antibodies to kill the parasite D) By increasing mucus production to flush out the parasite
A) Marine mammals B) An invertebrate C) A larger predatory fish D) A predatory bird
A) Sockeye B) Coho C) Pink D) Chinook
A) No, it is harmless to warm-blooded animals B) Yes, it can cause skin infections in humans C) Yes, if the fish is consumed raw D) Yes, it is a dangerous zoonotic pathogen
A) Over 80% B) Less than 10% C) Approximately 25% D) Exactly 50%
A) Myxosporean trout-fly B) Caligus rogercresseyi C) Pfiesteria piscicida D) Henneguya salminicola
A) Scomber B) Etroplus C) Mola D) Labroides
A) Labroides dimidiatus B) Oreochromis niloticus C) Pterophyllum scalare D) Etroplus maculatus
A) Less than 5 B) More than 40 C) Over 100 D) Exactly 10
A) Coral reefs B) Deep sea thermal vents C) Drifting kelp fields D) Mangrove forests
A) Streptococcosis B) Furunculosis C) Lactococcosis D) Koi herpes virus
A) Gyrodactylus salaris B) Philometra fasciati C) Huffmanela ossicola D) Paravortex
A) Within the gill bone B) In the swim bladder C) In the stomach D) On the skin surface
A) Cymothoa exigua B) Paravortex C) Didymozoid trematode D) Gnathiid isopod
A) Huffmanela ossicola B) Paravortex C) Monogeneans D) Philometra fasciati
A) Ammonia poisoning B) Granulocyte depletion C) Lymphoid deficiency D) T-cell stagnation
A) True lymphoid organs B) Gut tissue C) Anterior kidneys D) Macrophages
A) Spiral valve B) Epigonal organ C) Leydig's organ D) Spleen
A) The spleen B) The heart C) A mass associated with the meninges D) The anterior kidney
A) Granulocytes B) Neutrophils C) Erythrocytes D) Lymphocytes
A) Hagfish B) Sturgeon C) Zebrafish D) Shark
A) The heart B) The kidney C) The thymus D) The meninges
A) Spiral valve B) Anterior kidney C) Epigonal organs D) Leydig's organ
A) Whirling disease B) Hemorrhagic septicemia C) Roundworm disease D) Tapeworm infection
A) -10 °C B) 0 °C C) -20 °C D) -5 °C
A) 50% B) 25% C) 100% D) 75%
A) Diphyllobothrium B) Anisakis C) Myxobolus cerebralis D) Clonorchis sinensis
A) Clonorchis sinensis B) Anisakis C) Myxobolus cerebralis D) Diphyllobothrium
A) Clonorchis sinensis B) Diphyllobothrium C) Anisakis D) Viral hemorrhagic septicemia
A) Central Canada B) Southeast Asia C) Western Australia D) Antarctica
A) Washing with soap B) Boiling, burning, or freezing C) Removing the skin only D) Soaking in fresh water
A) They have been completely eradicated B) A sharp increase since 1980 C) No change since 1980 D) A decline since 1980 |