Changes In Blood Ion Levels And Mortality Rates In Different Sized Rainbow Trout (Oncorhychus Mykiss) Following Direct Transfer To Sea Water

Date
2004
Authors
Türker, Ali
Ergün, Sebahattin
Yigit, Murat
Contributor
Advisor
Department
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Journal Title
Journal ISSN
Volume Title
Publisher
Israeli Journal of Aquaculture - BAMIGDEH
Volume
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
Plasma ion values and mortality rates were compared for 450 rainbow trout (Oncorhynchus mykiss) of three sizes following direct transfer from fresh water to Black Sea water of about 18 ppt. In fish of 14.29±0.30 g, plasma Na+, Cl- and K+ levels significantly (p<0.05) rose above ini- tial values five days after the transfer and peaked at 178.6±5.66, 153.9±0.14 and 1.14±0.04 mM/l, respectively. In 20.45±0.48 g fish, these values also rose significantly, reaching 172.4±4.24, 151.8±6.65 and 0.98±0.04 mM/l by day 5. In fish of 29.91±0.99 g, however, plasma Na+ and Cl- concentrations peaked 19 days after transfer, reaching only 165.5±6.43 and 142.9±8.34 mM/l, while plasma K+ reached its highest concentration of 1.02±0.06 mM/l on day 12, All three concentrations dropped to near initial values on day 26. In all groups, the plasma Ca2+ level rose significantly (p<0.05) above the initial value five days after transfer and then declined while the plasma P5+ concentration dropped on day 5, reaching a minimum on day 12 and recovering the initial level on day 26. The lowest mortality (8.0±1.89%) was recorded in the 30 g group, followed by 19.3±0.94% and 24.7±0.94% in the 20 g and 14 g groups. The failure of the smallest fish to adapt after direct transfer to sea water was likely due to excessively high plasma Na+ and Cl- concentrations and tissue dehydration, indicating that fish of 30 g best adapt to a seawater environment of 18 ppt.
Description
Keywords
blood ion, mortality, rainbow trout, adaptation to sea water
Citation
Türker, A., Ergün, S., & Yigit, M. (2004). Changes In Blood Ion Levels And Mortality Rates In Different Sized Rainbow Trout (Oncorhychus Mykiss) Following Direct Transfer To Sea Water. The Israeli Journal of Aquaculture - Bamidgeh, 56(1), 51-58.
Extent
8 pages
Format
Geographic Location
Time Period
Related To
Rights
Rights Holder
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.