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WFS 443
| Term | Definition |
|---|---|
| Fish | aquatic, vertebrate, cold blooded, gills, fins, lays eggs, scales |
| Diadromous | mix of marine and freshwater |
| sagittiform | accelerates quickly in short bursts |
| fusiform | minimizes drag |
| depressiform | sits on floor |
| globiform | slow moving, relies on other things to deter predators |
| anguilliform | eels |
| filiform | hag fishes |
| lunate caudal fin | fast fish, can maintain high speeds for a long time, cannot stop or chang e direction quickly, cannot maneuver a lot |
| forked caudal fin | cruising, swim continuously at a fast rate, more maneuverability |
| truncate caudal fin | can accelerate when needed, more maneuverability |
| rounded caudal fin | highly maneuverable, can accelerate |
| Superior mouth | mouth more upwards |
| terminal mouth | mouth in front, most common |
| subterminal mouth | below where terminal mouth should be |
| inferior mouth | fully on underside |
| protrusible jaws | move jaws to create suction effect, in a lot of boney fish and terminal mouths |
| Physostomous (open swim bladder) | sim bladder connected to gut, can release air by burping |
| physoclistous (closed swim bladder) | Buoyancy takes longer to regulate |
| litoral zone | sunlight can penetrate all the way to the bottom |
| limnetic zone | sunlight cannot reach bottom |
| benthic zone | zone on the surface of the ocean |
| mesopelagic zone | twilight zone |
| temperature | mast factor for fishes metabolism |
| detritivores | consume decomposing matter |
| planktivores | eat plankton |
| molluscivores | eat mollusks |
| insectivores | eat insects |
| piscivores | eat other fish |
| semelparous | lays eggs and dies |
| iteroparous | can lay multiple egg batches |
| oviparity | develop in eggs |
| viviparity | develop in female, live birth |
| lithophilic | lay eggs on rocky substrate |
| phytophilic | lay eggs on plants |
| brood hiders | hides eggs but doesnt provide parental care |
| diadromous | lives part of life in marine and then moves to fresh water, or vis versa |
| fecundity | abilty to reproduce rapidly |
| r-K slection theroy | an evolutionary hypothesis that explains how organisms adapt their reproductive strategies based on the availability of resources and the stability of the environment. It categorizes two groups: r-selected species, produce a large number of offspring with |
| absolute/true abundance | estimate what we arent seeing |
| Relative abundance | assume that only what we are seeing can tell us what we want to know |
| type 1 survivorship | low amount of offspring, mores survivability |
| type 2 survivorship | linear amount of offspring and survivability |
| type 3 survivorship | a lot of offspring, low survivability |
| recruitment theory | the process by which young fish survive to become vulnerable to harvest, transitioning to a different life stage. |
Created by:
beatle1504