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The effects of hormones on development of embryonic and post embryonic salmonids, and hormone metabolism during these stagesYeoh, Choo-Guan 12 April 1993 (has links)
The importance of hormone reservoirs in mature teleost eggs is
unknown. To elucidate the effects of hormones on embryonic development,
steelhead trout eggs, Oncorhynchus mykiss, were immersed in either cortisol,
testosterone, or thyroxine at two different stages of development. Elevated
concentrations of cortisol were detectable in the trout eggs or embryos after
immersion. Eggs exposed to cortisol during water hardening hatched faster
than eggs exposed at the eyed stage. Eggs that hatched faster had elevated
cortisol and cortisol glucuronide concentrations at hatch compared to groups
immersed at eyed or control groups. The dedine of these elevated
concentrations of cortisol and cortisol glucuronide during embryonic
development suggest conversion, clearance or both. Eggs exposed to cortisol
at the earlier developmental stage did not appear to clear or convert cortisol
as efficiently as those exposed at a later stage. Testosterone did not
accelerate hatching in steelhead trout. Thyroxine accelerated hatching in
eggs immersed at the eyed stages but had no effect when given at water
hardening. These eggs that hatched faster were more synchronous in
hatching time compared to other groups. Prior to exogenous feeding (50
days post fertilization, dpf), animals immersed in cortisol when eye pigments
had higher mean condition factor (Kn) than other experimental or control
groups, but this effect was gone by 83 dpf. However, at 130 dpf, cortisol
groups that were immersed at the eyed stage were again heavier, longer, and
more robust than other groups. At 50 dpf, animals immersed in thyroxine at
water hardening were significantly longer and less robust (smaller condition
factor, Kn). These effects disappeared by 83 dpf. / Graduation date: 1993
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Fish species diversity and longitudinal succession in relation to stream order in the Sacony Creek, PennsylvaniaPeoples, Stephen James. January 1975 (has links)
Thesis (M.S.)--Dept. of Biology, Kutztown State College, 1975. / Source: Masters Abstracts International, Volume: 45-06, page: 3043. Includes bibliographical references.
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303 |
Homing, swimming behavior, range, activity patterns and reaction to increasing water levels of walleyes (Stizostedion vitreum vitreum) as determined by radio-telemetry in navigational pools 7 and 8 of the upper Mississippi River during spring, 1976 /Bahr, David Mark. January 1977 (has links)
Thesis (M.S.)--University of Wisconsin -- La Crosse, 1977. / Includes bibliographical references (leaves 53-57).
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Health of fish impringed on cooling-water intake screensBaker, Jeffrey Loy January 2007 (has links) (PDF)
Thesis (M.S.)--Auburn University, 2007. / Abstract. Includes bibliographic references (ℓ. 49-57)
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Using the Hough transform to detect fish in Freshwater Creek /Souza, Stephanie. January 1900 (has links)
Thesis (M.S.)--Humboldt State University, 2007. / Includes bibliographical references (leaves 90-91). Also available via Humboldt Digital Scholar.
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The embryological development of the Tilaiine fishes /Katz, Michelle. January 1988 (has links)
Thesis (MFA)--Rochester Institute of Technology, 1988. / Includes bibliographical references.
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307 |
Mercury and selenium and their interrelationship in three commercial species of South Australian fish.Zeleny, Peter Charles. January 1978 (has links) (PDF)
Thesis (M.Env.St. 1979) from the Department of Physical and Inorganic Chemistry, University of Adelaide.
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308 |
Characterisation of O-antigen biosynthesis genes in Vibro anguillarum and their association with IS1358 /Daniels, Kathy. January 1999 (has links) (PDF)
Thesis (Ph.D.)--University of Adelaide, Dept. of Microbiology and Immunology, 1999. / Corrigenda pasted onto back end-paper. Bibliography: leaves 167-189.
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Selection for faster growing black bream Acanthopagrus butcheri /Doupé, Robert G. January 2004 (has links)
Thesis (Ph.D.)--Murdoch University, 2004. / Thesis submitted to the Division of Health Sciences. Bibliography: leaves 63-76.
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310 |
An introductory look at the fishes of the Opossum Creek / Camp Hydaway Lake System and the effects of an herbicide on the Lake's aquatic plantsDeweber, Jefferson T. January 2007 (has links)
Thesis (Honors)--Liberty University Honors Program, 2007.
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