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Notes: Survival and Continued Normal Development of Fish Embryos after Incubation at Reduced Temperatures
Author(s) -
Cloud J. G.,
Erdahl A. L.,
Graham E. F.
Publication year - 1988
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1988)117<0503:nsacnd>2.3.co;2
Subject(s) - pimephales promelas , minnow , embryo , fish <actinopterygii> , biology , incubation , andrology , embryogenesis , zoology , anatomy , fishery , biochemistry , medicine
The tolerance of fathead minnow Pimephales promelas embryos to cooling depended upon developmental stage; late blastulae and gastrulae were more tolerant of cooling to 0–5°C from 23°C than were early blastulae. Survival of embryos or their ability to continue development was reduced as temperature declined to 0°C and length of exposure to cold temperatures increased. Embryos survived better after cooling if they were maintained in full‐strength fish Ringerˈs solution than if they were kept in 10% fish Ringerˈs solution or in 10% fish Ringerˈs solution with 0.2 M glucose. Embryo survival was greatest when gastrulae were held in 100% fish Ringerˈs at 10°C, a temperature at which development was slowed but not stopped.