PRESSURISED: 033 - Parasites with Rod Bray

The Deep-Sea Podcast

Our short and to-the-point PRESSURISED version of episode 33. If you don't have time for the full episode and want to get right to the science without any of our waffle, this is the place to be!

What if your deep-sea habitat was less rocky and more fleshy? That’s right, the time has come to talk all about deep-sea parasites and their fascinating life cycles.

We couldn’t think of anyone better to speak with than Dr Rod Bray, a pioneer in deep-sea parasitology research. Rod talks us through the captivating world of parasitic worms and his ongoing research into their ecology.

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Glossary

Cercaria - Offspring of digenean parasites.

Chimaera - A group of cartilaginous fish mostly found in deep waters.

Competition - A type of symbiosis where both species are harmed.

Commensalism - A type of symbiosis where one species benefits and the other is unaffected.

Ctenophore - “Comb jelly” marine invertebrates found worldwide.

Digeneans - A class of trematodes consisting of parasitic flatworms with two suckers.

Ectoparasites - Parasites that live on the skin of the host.

Elasmobranch - The subclass of cartilaginous fishes consisting of sharks, skates and rays.

Emmensalism - A type of symbiosis where one species is harmed and one is unaffected.

Endoparasites - Parasites that live inside the tissues of the host.

Facultative symbiosis - A type of symbiosis which is optional; not necessary for survival.

Flukes - “Trematoda” is a class of flatworms. They are internal parasites with a complex life cycle requiring at least two hosts.

Hydrozoan - A class of cnidaria. They are small predatory animals, most are benthic and involve a polyp stage.

Monogeneans - A group of ectoparasitic flatworms commonly found on the skin, gills, or fins of fish.

Mutualism - A type of symbiosis where both species benefit.

Myxozoa - A group of aquatic parasites which contains some of the smallest animals known to exist.

Neutralism - A type of symbiosis where neither species benefit nor are negatively affected.

Parasitism - A type of symbiosis where one species benefits and one is harmed.

Parasite burden - A measure of the number and virulence of the parasites that a host harbours.

Symbiosis - “Living together” two different species living closely together.

Teleosts - “Bony fishes”.

Tunicate - These are marine invertebrates sometimes called “sea squirts”.

Links

Rod’s research

Rod’s article summarising the state of knowledge of deep-sea parasites in 2020

Credits

Theme – Hadal Zone Express by Märvel

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