Fish Biology and Evolution: Key Concepts and Taxonomy Questions and Correct Answers | Latest Update

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Fish Biology and Evolution: Key Concepts and
Taxonomy Questions and Correct Answers | Latest
Update
Ichthyology

Ans: The branch of biology devoted to the study of fishes.

Fish

Ans: Singular or plural of one species.
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Fishes

Ans: Plural term for multiple species.
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Species richness

Ans: Number of species in a community or ecosystem.
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Intraspecific

Ans: Variation within a species.
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Interspecific

Ans: Differences between species.

Seven key fish traits

Ans: Ectothermic, aquatic, chordate, bilateral symmetry, fins, gills,
scales.

Ectothermic

Ans: Body temperature depends on environment.

Diadromous

Ans: Migrates between fresh and saltwater.

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Anadromous

Ans: Born in freshwater, live in ocean, return to spawn.

Catadromous

Ans: Born in ocean, live in freshwater, return to spawn.

Lentic habitat

Ans: Standing freshwater.

Lotic habitat
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Ans: Flowing freshwater.
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Benthic zone

Ans: Bottom habitat.

Pelagic zone
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Ans: Open water habitat.
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Universal solvent

Ans: Water dissolves many substances.

Countercurrent exchange

Ans: Opposite flow of blood and water in gills increases oxygen uptake.

Evolution

Ans: Change in heritable traits in a population over time.

Fitness

Ans: Relative reproductive success.

Natural selection