Lecture 2 - Intro to Arthropods + Crustacea Flashcards
What is the minimum number of leg pairs for organisms of Crustacea?
5
What is the common cavity containing the open circulatory system of arthropods?
Haemocoel
What is the name for the respiratory system of terrestrial arthropods?
Tracheal system
True or false - arthropods are dioecious.
True
True or false - Intermittent parasites can also be facultative.
False. Intermittent parasites require the host absolutely.
What are the 7 categories of chemicals acting on the nervous system of arthropods?
Chlorinated hydrocarbons Organophosphates Carbamates Formamidines Pyrethroids Macrocyclic Lactones Neo-nicotinoids
Give an example of an anthropod repellent.
DEET, citronella.
Give an example of a chlorinated hydrocarbon.
DDT
Give an example of an organophosphate and its use in arthropods.
Diazinon - jetting sheep for blowfly control
Give an example of a carbamate and its use in arthropods.
Carbaryl - active ingredient in flea collars
Give an example of a formamidine and its use in arthropods.
Amitraz - control of demodectic mange in dogs.
How do formamidines work?
Inhibit monoamine oxidase.
Give an example of a pyrethroid and its use in arthropods.
Permethrin - flea control in dogs (toxic to cats)
What is the route of admin for a pyrethroid?
Topical.
Give an example of a ML and its use in arthropods.
Selamectin (an avermectin) in cats and dogs for flea control (Revolution)
What is the mechanism of action for MLs?
Act on glutamate-gated Cl- channels.
What are the administration options for MLs?
Topical, oral, parenteral
Give an example of a neo-nicotinoid and its use in arthropods.
Imidacloprid - flea control in cats and dogs (Advantage)
How does imidacloprid work?
Blocks the nicotinic ACh receptor
How does fipronil work? What is an example on the market?
Blocks GABA receptors e.g Frontline
Give two examples of growth regulators. What are the possible admin routes?
Lufenuron, Fluazuron
Oral or topical
What are the three sub-classes of parasitic crustaceans?
Copepoda
Isopoda
Pentastomida
What is Lernea spp? What implications does it have for the animal?
The anchor worm of aquarium fish. Does not compromise welfare but can confer production loss for business.
What is the latin name for fish lice?
Argulus foliaceus.
Why is Cyclops spp. a target for parasite control?
Not parasitic in itself but intermediate host for a number of problematic nematodes.
Where might you find Conodophilus imbricatus?
In the oral cavity of a host fish.
Name one species from the sub-class Isopoda.
Ourozuektes owenii
What system do organisms of sub-class Pentastomida parasitise?
The respiratory system.
What is Linguatula serrata? What drug would you use to treat it?
The tongue worm of the dog - use Ivermectin.
Is L. serrata zoonotic?
Yes
What is Armillifer armillatus? Is it zoonotic?
Respiratory parasite of reptiles, especially snakes.
Yes - would have to consume intermediate host (mouse)
