Round: Category: Biology Time: 4 minutes



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Round:

Category: Biology

Time: 4 minutes
Fill in the spaces below with the name of the part of the fish corresponding to the numbered arrows. (1 pt. each)

#1

#2

#3

1.) ____________________________ 2.) _____________________________ 3.) ___________________________
Briefly describe the purpose of each section (1 pt. each)

1.)

2.)

3.)

You are fishing off the coast of Florida, and you catch an Atlantic Herring, a fish known for being a very active swimmer compared to a less active fish such as the American Brown Bullhead. Briefly compare the following sections of the gills of the two fish. (2 pts. each)
Wall Thickness of Individual Lamellae:

Distance between Lamellae:


Fish use a countercurrent heat exchange system to help them increase the amount of O2 uptake. What is contained within a lamella to allow this system to work? (2 pts.)


Briefly describe each of the following gill morphologies and state the types of fish that typically correspond to each. (6 points total)
Holobranch: Type of Fish:

Hemibranch: Type of Fish:



Pseudobranch: Type of Fish:
Agnatha, Elasmobranchs and Bony Fishes typically correspond to the three main variations in gills, pouched, septal and opercular. Briefly describe the differences. (2 pts. total)

ANSWER ANSWER ANSWER

Round:

Category: Biology

Time: 4 minutes
Fill in the spaces below with the name of the part of the fish corresponding to the numbered arrows. (1 pt. each)

#1

#2

#3

1.) ____Gill Raker____ 2.) _____Gill Arch______ 3.) ____Gill Filaments______
Briefly describe the purpose of each section (1 pt. each)

1.) A gill raker filters big particles and protects the gill filaments from getting clogged up.


2.) A gill arch supports the gill structure and the gill filaments


3.) Gill filaments contain lamellae that carry out respiration


You are fishing off the coast of Florida, and you catch an Atlantic Herring, a fish known for being a very active swimmer compared to a less active fish such as the American Brown Bullhead. Briefly compare the following sections of the gills of the two fish. (2 pts. each)


Wall Thickness of Individual Lamellae: The wall thickness of individual lamellae would be thinner (2 pts.) in the more active fish, the Atlantic Herring.

Distance between Lamellae: The lamellae would be closer together (2 pts.) in the more active fish, the Atlantic Herring.

Fish use a countercurrent heat exchange system to help them increase the amount of O2 uptake. What is contained within a lamella to allow this system to work? (2 pts.)
Capillaries

Briefly describe each of the following gill morphologies and state a type of fish that typically corresponds to each. (6 points total)


Holobranch: Type of Fish:

Gill arch with anterior AND posterior rows Jawed Fishes

of gill filaments

Hemibranch: Type of Fish:

Gill arch with EITHER anterior OR Sharks

posterior rows of gill filaments

Pseudobranch: Type of Fish:

gill bar with posterior filaments modified to Skates, Rays

serve a nonrespiratory function such as

sensory or salt balance


Agnatha, Elasmobranchs and Bony Fishes typically correspond to the three main variations in gills: pouched, septal and opercular, respectively. Briefly describe the differences. (2 pts. total)
Agnatha have pouched gills, which are pores rather than gills slits. (1 pt.) Elasmobranchs have gill slits (1 pt.) and gill septa. Whereas opercular gills have an operculum for protection.

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