Species introduced to Lake Victoria causing native fish decline?
“Nile perch” for species introduced to lake victoria causing native fish decline. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Ecological interpretation requires separating the immediate process from its broader consequence. A mechanism operating through physiology or behavior can scale up to alter survival, reproduction, abundance, distribution, and community structure. The remaining alternatives—“Cane toad”, “Zebra mussel”, “Achatina fulica”—refer to different states, processes, or scales and
Ref: NCERT Biology Class 12, Ch. 15 Biodiversity and Conservation
