hatchery fish造句

• Researchers have raised concerns about hatchery fish potentially breeding with wild fish.
• This means that hatchery fish tend to return to their natal hatcheries.
• Pre-spawn mortality has also been observed in both wild and hatchery fish alike.
• Some hatchery fish have been introduced in an attempt to mitigate the losses.
• Genetic testing revealed that native trout had not interbred with the hatchery fish.
• The question is this : What is the difference between wild and hatchery fish?
• Hatchery fish may in some cases compete with wild fish.
• Only the oxygen-deficient upper portion received hatchery fish annually.
• They are easy marks; especially hatchery fish that are conditioned to feed on the surface.
• Would federal officials intervene to relieve wild salmon from hatchery fish competition in distant oceans?
• The latter is currently impossible because hatchery fish usually can't be distinguished from wild fish.
• The changes are less pronounced in the hatchery fish.
• The creek is not stocked with hatchery fish.
• They focus, he said, on the straying of hatchery fish onto the spawning beds of wild fish.
• The group has favored declaring all salmon in New England endangered, including the progeny of hatchery fish.
• Nevertheless, the growing reliance on hatchery fish raises questions about the long-term health of the salmon population.
• All the diseased hatchery fish had come from the eastern Maine stream, suggesting the outbreak began there.
• Perhaps most important, wild fish have difficulty surviving the gantlet of nets often targeted on hatchery fish.
• With its increasing availability, this would address the problems of rising costs for buying hatchery fish feed.
• Aside from diluting the genetic identity of wild fish, hatchery fish can compete for food and spread disease.