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Embryo Survival and Fry Emergence from Two Methods of Planting Brown Trout Eggs
Author(s) -
Harshbarger T. J.,
Porter P. E.
Publication year - 1982
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8659(1982)2<84:esafef>2.0.co;2
Subject(s) - brown trout , salmo , streams , trout , biology , sowing , larva , fishery , ecology , fish <actinopterygii> , horticulture , computer network , computer science
Survival of larval trout through the swim‐up stage was determined for eyed eggs of brown trout (Salmo trutta) planted both in the streambed and in Whitlock Vibert boxes. Tests were made in first‐, second‐, and third‐order streams and intragravel environmental factors were evaluated. Direct plants produced 2 times more sac fry than box plants and 3.5 times more swim‐up fry. Sediment deposition was approximately 100% greater in first‐ and second‐order streams than in third‐order streams, and sediments accumulated disproportionately in box plants. This seemed to accoimt for survival differences between planting techniques and among stream orders.