Which effect arises when the migratory route of salmon becomes fragmented by dams, despite an intact olfactory map?

💡 Explanation

Decreased juvenile survival occurs because fragmentation disrupts homing triggered by olfactory maps and impedes migration, therefore fish cannot reach spawning grounds to reproduce successfully, rather than improving the immediate survival chances under stress of the migratory challenge.

• Which outcome occurs when reducing blood to gill water differential?
• Which consequence results when inadequate sun inhibits honeybee dance?
• Which outcome occurs in a fish gill when blood flow reverses direction relative to water flow?
• Which metabolic outcome occurs during extended winter hibernation when skeletal muscle stops shivering thermogenesis?
• Which consequence results when a marmot's hibernation den floods?
• Which consequence results when cheetas undergo unsustainable elevated exertion chasing fast prey?