Why do kokanee salmon spawn only once?

Answer:

A

Explanation:

Constructing passage ways near the dams to allow to salmon to swim around blocked rivers. The construction of dams in rivers has blocked the path of  some salmons returning to spawning grounds. The best way to overcome this is to make the passage ways near the dams to allow salmons to swim in areas which have blocked due to dams. So that salmons can returned to the spawning ground and can spawn which leads to increase in their population.

Answer:

Salmon change color to attract a spawning mate. Pacific salmon use all their energy for returning to their home stream, for making eggs, and digging the nest. ... Unlike Pacific salmon, Atlantic salmon do not die after spawning, so adults can repeat the spawning cycle for several years.

Below is a list of supplies available in a laboratory
• four flasks with stoppers
• floodlight
• tap water
• graduated cylinders
• small aquarium plants
• four small fish
• bromthymol blue (a chemical indicator
that changes color from blue to yellow as
the level of carbon dioxide in a solution
increases)
The class sets up an experiment with the four flasks as shown.
Pak 100. www.bymel wee plane
Pak 200w, byl Noe 2 mall fish
Pak 100 m. well bromymel e 2 wall fish plant
Pak 100 m. ll. bromyal blue
Which flasks contain organisms undergoing cellular respiration?
Flask 1, 2 and 3
O Flask 1 and 3
O Flask 2 and 3
O None