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Dive into the research topics where Jeffery M. Morrissette is active.

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Featured researches published by Jeffery M. Morrissette.


The Journal of Experimental Biology | 2004

In Situ Cardiac Performance of Pacific Bluefin Tuna Hearts in Response to Acute Temperature Change

Jason M. Blank; Jeffery M. Morrissette; Ana M. Landeira-Fernandez; Susanna B. Blackwell; Thomas D. Williams; Barbara A. Block

SUMMARY This study reports the cardiovascular physiology of the Pacific bluefin tuna (Thunnus orientalis) in an in situ heart preparation. The performance of the Pacific bluefin tuna heart was examined at temperatures from 30°C down to 2°C. Heart rates ranged from 156 beats min–1 at 30°C to 13 beats min–1 at 2°C. Maximal stroke volumes were 1.1 ml kg–1 at 25°C and 1.3 ml kg–1 at 2°C. Maximal cardiac outputs were 18.1 ml kg–1 min–1 at 2°C and 106 ml kg–1 min–1 at 25°C. These data indicate that cardiovascular function in the Pacific bluefin tuna exhibits a strong temperature dependence, but cardiac function is retained at temperatures colder than those tolerated by tropical tunas. The Pacific bluefin tunas cardiac performance in the cold may be a key adaptation supporting the broad thermal niche of the bluefin tuna group in the wild. In situ data from Pacific bluefin are compared to in situ measurements of cardiac performance in yellowfin tuna and preliminary results from albacore tuna.


Physiological and Biochemical Zoology | 2007

Influence of Swimming Speed on Metabolic Rates of Juvenile Pacific Bluefin Tuna and Yellowfin Tuna

Jason M. Blank; Charles J. Farwell; Jeffery M. Morrissette; Robert J. Schallert; Barbara A. Block

Bluefin tuna are endothermic and have higher temperatures, heart rates, and cardiac outputs than tropical tuna. We hypothesized that the increased cardiovascular capacity to deliver oxygen in bluefin may be associated with the evolution of higher metabolic rates. This study measured the oxygen consumption of juvenile Pacific bluefin Thunnus orientalis and yellowfin tuna Thunnus albacares swimming in a swim‐tunnel respirometer at 20°C. Oxygen consumption (Ṁo2) of bluefin (7.1–9.4 kg) ranged from \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape


The Journal of Experimental Biology | 2007

Temperature effects on metabolic rate of juvenile Pacific bluefin tuna Thunnus orientalis

Jason M. Blank; Jeffery M. Morrissette; Charles J. Farwell; Matthew Price; Robert J. Schallert; Barbara A. Block


American Journal of Physiology-cell Physiology | 1998

Cloning and characterization of fiber type-specific ryanodine receptor isoforms in skeletal muscles of fish

Jens P. C. Franck; Jeffery M. Morrissette; John Keen; Richard L. Londraville; Mark Beamsley; Barbara A. Block

235\pm 38


Science | 2005

Satellite Tagging and Cardiac Physiology Reveal Niche Expansion in Salmon Sharks

Kevin C. Weng; Pedro C. Castilho; Jeffery M. Morrissette; Ana M. Landeira-Fernandez; David Holts; Robert J. Schallert; Kenneth J. Goldman; Barbara A. Block


American Journal of Physiology-regulatory Integrative and Comparative Physiology | 2004

Temperature dependence of the Ca2+-ATPase (SERCA2) in the ventricles of tuna and mackerel

Ana M. Landeira-Fernandez; Jeffery M. Morrissette; Jason M. Blank; Barbara A. Block

\end{document} mg kg−1 h−1 at 0.85 body length (BL) s−1 to \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape


The Journal of Experimental Biology | 2002

Effects of temperature, epinephrine and Ca 2+ on the hearts of yellowfin tuna (Thunnus albacares)

Jason M. Blank; Jeffery M. Morrissette; Peter S. Davie; Barbara A. Block


The Journal of Experimental Biology | 2003

Characterization of ryanodine receptor and Ca2+-ATPase isoforms in the thermogenic heater organ of blue marlin (Makaira nigricans).

Jeffery M. Morrissette; Jens P. G. Franck; Barbara A. Block

498\pm 55


Comparative Biochemistry and Physiology A-molecular & Integrative Physiology | 2007

Elevated Ca2+ ATPase (SERCA2) activity in tuna hearts: Comparative aspects of temperature dependence

Pedro C. Castilho; Ana M. Landeira-Fernandez; Jeffery M. Morrissette; Barbara A. Block


American Journal of Physiology-regulatory Integrative and Comparative Physiology | 2000

Characterization of RyR1-slow, a ryanodine receptor specific to slow-twitch skeletal muscle

Jeffery M. Morrissette; Le Xu; Alexandra Nelson; Gerhard Meissner; Barbara A. Block

\end{document} mg kg−1 h−1 at 1.80 BL s−1. Minimal metabolic rates of swimming bluefin were \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape

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David Holts

National Marine Fisheries Service

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Gerhard Meissner

University of North Carolina at Chapel Hill

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