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