Survival of Brown Trout Eggs: Two Planting Techniques Compared

Abstract

Vibert boxes are commonly used in planting trout eggs in streams for incubation. We compared survival of eggs, embryos, and swim-up fry of brown trout (Salmo trutta) in direct intragravel plants and in Vibert boxes. We found that egg mortality increased disproportionately in Vibert boxes after 4 weeks until time of hatching. Direct intragravel plants yielded the highest survival to the swim-up stage.