1. In lecture we went over an experiment by Bshary and Grutter (2006) that addressed the maintenance of a cleaning mutualism for coral reef fishes. Describe their experiment and the conclusions that they reached based on their experiment.

2. Which correctly describes the roles of alpheid shrimps and gobies in their protection mutualism?

Group of answer choices

GOBIES DIG BURROWS FOR SHRIMP, AND SHRIMP CLEAN PARASITES OFF OF THE GOBIES

SHRIMP DIG BURROWS AND GOBIES WATCH FOR APPROACHING PREDATORS

Gobies chase away fish predators and shrimp chase away invertebrate predators

Shrimp get a meal of parasites and gobies get cleaned of parasites

3. Which is true about the association between the goby fish Gobiodon histrio and corals of the genus Acropora?

Group of answer choicesACROPORA CORALS AND GOBIES HAVE AN EFFECTIVE MUTUALISM ONLY WHEN THE ALGAE THAT DAMAGES CORAL IS NON-TOXIC

GOBIES CAN HELP CORAL BY CONSUMING ALGAE, BUT THE GOBIES ARE NOT AS EFFECTIVE AT DOING THIS AS CRUSTACEANS THAT LIVE IN THE ALGAE

GOBIES ARE SIGNALED BY THE CORALS WHEN TOXIC ALGAE COME INTO CONTACT WITH THE CORAL

ACROPORA SIGNALS GOBIES TO COME CONSUME ALGAE EVEN WHEN THE EXPERIMENTERS PLACED AN ALGAL MIMIC (CONTROL TREATMENT) NEXT TO CORAL, WHICH WAS A PIECE OF INERT MESH

4. Which is true of protection mutualisms between corals and small crustaceans?

Group of answer choices

SMALL CRUSTACEANS ARE EFFECTIVE A CHASING AWAY VERY SMALL PREDATORS OF CORALS, BUT NOT LARGER ANIMALS LIKE FISHES

Corals that have protecting crustaceans produce excess mucus compared to corals that do not have protecting crustaceans

SMALL CRUSTACEANS ACT AS CLEANERS FOR THE CORALS BY PICKING PARASITES OFF OF THE CORAL TISSUE

THE SMALL CRUSTACEANS GET A “HOME” (A CREVICE TO LIVE IN) FROM THE MUTUALISM, BUT THAT IS THE ONLY BENEFIT FOR THEM THAT WE KNOW ABOUT

5. Which mutualism is maintained easily because there is very little cost to the association?

Group of answer choicesFISH SHOALING

CLEANING MUTUALISMS INVOLVING CLEANER SHRIMP AND LARGE FISHES

CORALS AND ZOOXANTHELLAE

A PROTECTION MUTUALISMS INVOLVING GOBIES AND CORALS

6. Which would be an example of an obligate, specific mutualism?