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The leucogram as an indicator off marine‐cultured rainbow trout, Oncorhynchus mykiss (Walbaum), health in The Netherlands
Author(s) -
Peutz I L J A,
Oorschot R W A,
Johnson G R,
Horney B S,
Boon J H
Publication year - 1996
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1996.tb01273.x
Subject(s) - rainbow trout , biology , fishery , abundance (ecology) , zoology , trout , fish <actinopterygii>
During a longitudinal survey from June until October 1987 cytological blood parameters of smoltified marine cultured rainbow trout, Oncorhynchus mykiss (Walbaum), were monitored. In this period, the trout were exposed to environmental stress resulting in summer mortality. The statistical analyses showed that the observed summer mortality was preceeded by a shift in the relative abundance of different peripheral white blood cells (PWBCs), from lymphocytic to extremely granulocytic, which was mainly attributed to mature granulocytes. It was concluded that changes in relative abundance of PWBCs can predict health disturbances in marine‐cultured rainbow trout.