Which risk increases when migrating salmon transition from saltwater to freshwater habitats during spawning season?

💡 Explanation

When salmon migrate to freshwater, the external environment has lower solute concentration than their internal fluids; water influx occurs across the gills via osmosis because of high membrane permeability, causing hyperosmotic stress. Therefore hyperosmotic stress risk increases, rather than hyposmotic stress, toxicity or oxygen depletion, which represent opposing imbalances.

• Which performance change results when avian wing feathers become contaminated with oil?
• Which impairment occurs avian flight feather when barbules lose interlocking hook structures?
• Which outcome occurs when abnormally high temperatures inhibit Rubisco activation in C3 plants?
• In avian respiration, which outcome specifically occurs when increased wing loading reduces the effectiveness of air sacs?
• Which consequence results when excessive manganese accumulates in plant tissues?
• Which change occurs in soaring birds when wing loading increases due to temporary fat storage?