What do young salmon, known as fry or parr, initially consume in freshwater streams?
Answer
Small invertebrates
The earliest stages of the salmon life cycle, when they are identified as fry or parr residing in their native freshwater streams, dictate a diet consisting primarily of small invertebrates found in that environment. This initial stage of feeding is vital for rapid growth and development before the fish undergo the physiological changes necessary to migrate to the ocean. The shift from these smaller, localized food sources to the much broader marine diet marks a significant transition point in their development, influenced by their size and increasing predatory capabilities.
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