FISH Flashcards
class: “lacking jaws”
agnasthostomata
class of cartilaginous fish including sharks and rays
chondrycthyes
bony fish
osteichthyes
example of bony fish
blob fish
examples of agnasthostomata
eels, lampreys,
fish family of guppies mollies swordtails
cichlidae
fish family of milk fish
chanidae
fish family of salmon and trout
salmonidae
fish family of arrowanas and arapaima
osteoglossidae
salwater fish are ___ to their surroundings
hypotonic
as sea water passes through the mouth and over the gill membranes, water molecules___ out of the blood into the sea water by __
diffuse
osmosis
saltwater fishes produces ___ volume of urine
small
drinking sea water brings a __ quantity of salt into the blood and this has to be
removed.
large
to replace the water they lose, saltwater fish drink sea water. To produce a small a volume of urine they must have a ___ rate of filtration of water into the ____.
low
kidney tubules
salwater fish kidneys have few small ____
glmoeruli
Salt is removed by ____in the gills, which actively transport salts from the blood into the surrounding water.
chloride secretory cells
freshwater fish are ___ to their surroundings
hypertonic
water molecules diffuse out of the blood into the sea water by osmosis
a. saltwater fish
b. freshwater fish
A
water molecules diffuse from the fresh water into the blood by osmosis.
a. saltwater fish
b. freshwater fish
B
these fish must
produce a very large volume of urine to balance this large intake of water.
freshwater fish
o produce a large volume of urine the freshwater fish must remove a large volume of water from the blood by having a __ rate of filtration into the kidney tubules.
high
how many cm^3 is 1 L
1000
rule of thumb in stocking density
1 g of fish = 4L of water
ideal temp and pH
25-32 C
6.7 -9.9
supersaturation of DO due to leaks in pump or valve system; dense algal bloom
Gas bubble dz
Associated with
malfunction of the swim bladder
as well as over-handling, high
temperature, over-illumination
and dense algal bloom (O2
depletion at night,
supersaturation during the day
swim bladder stress syndrome
affected fish
gather at water inlets and
outlets; wide gaping mouth
swimming at water surface
showing rapid opercular
movement
hypoxia
corroded and milky skin; corroded gills
alkalosis
rapid swimming; gasping; increased mucus secretion
acidosis
temperature and salinity shock; low oxygen; overcrowding; rough
handling; gill fouling
muscle necrosis in shrimp
opaque white areas in abdomen; blackening on edges of
uropod; woodgrain appearance of abdominal muscle in post larvae; opaque
white areas in abdomen
muscle necrosis in shrimp
ulcerative lesions on the head and pectorals, dorsal and upper tail fins
sunburn
partial or complete rigid flexure of the tail; shrimps swim
with humped abdomen; fully cramped shrimps lie on sides at the pond
bottom; incomplete moulting
body/tail cramp in shrimp
presence of old exoskeleton attached to newly melted larvae, especially in appendages;
abnormal swimming
body/tail cramp in shrimp
tx for carp pox
no cure but myxazin can hel[
