As Atlantic salmon (Salmo salar) make the developmental transition from parr to smolt, a number of hormones, such as prolactin, growth hormone, cortisol, and thyroid hormones, interact with a variety of environmental cues to produce changes in
A) body coloration and markings.
B) osmoregulation to support life in freshwater vs. life in saltwater.
C) territoriality and feeding styles.
D) all of the above.

Question

Quizplus · Accepted Answer

As Atlantic salmon transition from parr to smolt, they undergo changes in body coloration and markings, osmoregulation to adapt from freshwater to saltwater environments, and in their territoriality and feeding styles. Hormones and environmental cues drive these adaptations to prepare the salmon for their oceanic phase.

As Atlantic Salmon (Salmo Salar) Make the Developmental Transition from Parr