Cardio

Fish Cardiovascular Physiology:

Plasticity in Design and Function

SYMPOSIUM PROCEEDINGS

Kurt Gamperl

Holly Shiels

Don MacKinlay

International Congress on the Biology of Fish

Tropical Hotel Resort, Manaus Brazil, August 1-5, 2004.

Physiology Section,

American Fisheries Society

International Standard Book Number(ISBN) 1-894337-43-3

Notice

This publication is made up of a combination of extended abstracts and full papers, submitted by the authors without peer review. The formatting has been edited but the content is the responsibility of the authors. The papers in this volume should not be cited as primary literature. The Physiology Section of the American Fisheries Society offers this compilation of papers in the interests of information exchange only, and makes no claim as to the validity of the conclusions or recommendations presented in the papers.

PREFACE

Fish cardiovascular function/physiology has been an extremely active area of research over the past 25 years, and our knowledge of how this organ system adapts to evolutionary forces or environmental challenges continues to increase. The design of the fish cardiovascular system shows significant inter-specific variation. In addition, intra-specific modifications in cardiovascular morphology, biochemistry and physiology are evident during development, when fish are exposed to changes in environmentally relevant parameters such as temperature, hypoxia and food availability, or when fish are forced to meet increased demands associated with training, elevated activity and maturation. In this symposium, there are 14 presentations that highlight specific aspects of cardiovascular plasticity in a wide range of fish species (from flounder to bluefin tuna), and that clearly demonstrate the multi-level (molecular, cellular and organ) nature of the control of, or adaptations in, this organ system. This is the 5^th symposium on cardiovascular physiology organized for the International Congress on the Biology of Fish, and nicely illustrates the diversity of technical approaches and research models that will be required to provide a comprehensive picture of how the fish’s heart, vasculature, blood cells and associated organs will respond to challenges associated with natural perturbations or anthropomorphic induced alterations in the environment.

TABLE OF CONTENTS

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Mechanisms Responsible for the Enhanced Cardiac Performance of Winter Flounder

Paula da Costa Mendonça

Cardiorespiratory Modifications, and Limitations, in Growth Hormone Transgenic Atlantic Salmon (Salmo salar)

E. Deitch

Mechanisms of myocardial hypoxia tolerance, and preconditioning, in the Atlantic cod (Gadus morhua).

A.K. Gamperl

Cardiovascular control and flexibility during early development in Zebrafish (Danio rerio)

Thorsten Schwerte

The influence of heart perfomance on cardiovascular parameters in developing zebrafish (Danio rerio)

Renate Kopp