Aquatic ecology quiz 3

r-strategists

r-strategists

lots of small babies, little to no parenting

type 3 survivorship

highest mortality rate at egg stage

eggs

very fragile; eyes develop and are light sensitive; cool water flowing over helps supply oxygen and get rid of waste

alevin

tiny fish that break out of the egg; have a yolk sac that supplies food and oxygen; stay in gravel until they’re big enough to swim out; most get trapped and die

fry

small fish, the size of a finger or less; begin to swim to the surface; get their own food (small insects) and oxygen; preyed on

smolt

teenagers; color changing to adult colors; grow rapidly, (if saltwater, gill adapt to regulate salt)

adult

adult size, adult colors, swim long distances, eat adult diet

spawners

reproductively mature; male and female swim upstream to lay eggs and deposit sperm; usually die afterwards

fish management

hatcheries managed by NC Wildlife; game and non-game fish; cold and warm water hatcheries; species specific management plans; sterilization of introduced species (triploidly)

invertebrates

animals without backbones; multicellular heterotrophs; eukaryotic; 95% to all animals

coelomates

many tubes; digestive tract surrounded by specialized organs suspended within the body (more complex)

acoelomates

a tube within a tube; one long digestive tract surrounded by tissue/fluid (simple)

radial

type of body symmetry; body parts extend from a central point

bilateral

type of body symmetry; can divide in half (left-right or front-back)

porifera

holey skin

cnidaria

stinging cells

mollusca

shelled

platyhelminthes

flatworms

nematoda

roundworms

annelida

segmented worm

athropoda

segmented legs

echinodermata

spiny skin

freshwater mussel importance

filter pollutants out of water; bioindicators

% of freshwater mussels endangered

50

mussel gills

internal to filter food and oxygen

mussel reproduction

males live upstream and release sperm → females who are downstream get fertilized → larvae are released and attach to host fish → after they grow big enough, they drop onto sediments and grow