When do fishes become juveniles?

1. Front Matter

   Pages 1-6

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2. Prelude: looking at early development in fishes

   1. Prelude: looking at early development in fishes

      • Vladimír Kováč, Gordon H. Copp

      Pages 7-14

3. Keynote presentation

   1. Front Matter

      Pages 15-16

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   2. Alternative ways to become a juvenile or a definitive phenotype (and on some persisting linguistic offenses)

      • Eugene K. Balon

      Pages 17-38

4. Reflections on early ontogeny and metamorphosis

   1. Front Matter

      Pages 39-40

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   2. Features of transition from larva to juvenile in fishes with different types of early ontogeny

      • Dimitri A. Pavlov

      Pages 41-52

   3. Thyroxine as a mediator of metamorphosis of Atlantic halibut, Hippoglossus hippoglossus

      • Jostein Sigurd Solbakken, Birgitta Norberg, Kuninori Watanabe, Karin Pittman

      Pages 53-65

   4. Early development of the sofie, Chondrostoma toxostoma

      • Rodolphe E. Gozlan, Gordon H. Copp, Jean-Noel Tourenq

      Pages 67-77

   5. The reproductive biology and early ontogeny of the mouthbrooding Banggai cardinalfish, Pterapogon kauderni (Perciformes, Apogonidae)

      • Alejandro Vagelli

      Pages 79-92

   6. The onset of the juvenile period in carp, Cyprinus carpio: a literature survey

      • Lorenzo Vilizzi, Keith F. Walker

      Pages 93-102

5. Organism-environment relationships

   1. Front Matter

      Pages 103-104

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   2. Morphometry of the stone loach, Barbatula barbatula: do mensural characters reflect the species’ life history thresholds?

      • Vladimír Kováč, Gordon H. Copp, Malcolm P. Francis

      Pages 105-115

   3. Correspondence between ontogenetic shifts in morphology and habitat use in minnow Phoxinus phoxinus

      • Predrag D. Simonović, Paul Garner, Edward A. Eastwood, Vladimír Kováč, Gordon H. Copp

      Pages 117-128

   4. Fish, flows and flood plains: links between freshwater fishes and their environment in the Murray-Darling River system, Australia

      • Paul Humphries, Alison J. King, John D. Koehn

      Pages 129-151

   5. Comparison of growth plasticity in the laboratory and field, and implications for the onset of juvenile development in sofie, Chondrostoma toxostoma

      • Rodolphe E. Gozlan, Gordon H. Copp, Jean-Noel Tourenq

      Pages 153-165

6. Ontogeny of predator-prey interactions

   1. Front Matter

      Pages 167-168

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   2. A review of predation impact by 0+ fish on zooplankton in fresh and brackish waters of the temperate northern hemisphere

      • Thomas Mehner, Ralf Thiel

      Pages 169-181

   3. Seasonal and diel utilisation of inshore microhabitats by larvae and juveniles of Leuciscus cephalus and Leuciscus leuciscus

      • Etienne Baras, Joseph Nindaba

      Pages 183-197

   4. Seasonal shifts in day-time resource use of 0+ barbel, Barbus barbus

      • Antje Bischoff, Jörg Freyhof

      Pages 199-212

   5. Vertical distribution and feeding activity of metamorphosing sole, Solea solea, before immigration to the Bay of Vilaine nursery (northern Bay of Biscay, France)

      • Françoise Lagardère, Rachid Amara, Lucette Joassard

      Pages 213-228

Metamorphosis and the transition from larvae or embryos to juveniles in fishes are important in order to answer, for example, questions about: (1) life-history styles and their modifications in evolutionary perspective and within current environmental demands; (2) the development and application of fisheries recruitment models, (3) the use of ontogenetic scales for interspecific comparisons, (4) the identification of ontogenetic shifts in resource use, and (5) the discovery of evolutionary interrelationships of species or genera. This volume is dedicated to recent studies and reviews of existing knowledge on this insufficiently-addressed area of ichthyology. Most of the papers in this volume were presented in Bratislava, Slovakia, at the 1st International Workshop of the Fish Ontogeny Network of Europe (FONE) in September 1997, a meeting sponsored in part by the European Commission. This volume emphasizes an integrated approach to the study of fish ontogeny, which is a process during which one event is related to another and everything is related to everything else, encompassing physiology, morphology, behaviour and niche. Within this comprehensive perspective, the papers in this volume are grouped along four major themes: reflections on early ontogeny and metamorphosis, organism-environment relationships, ontogeny of predator-prey interactions, and behaviour and ontogeny. Among other issues, the papers consider topics such as whether one can identify when fish metamorphosis ends, whether the larva period begins with hatching or with the onset of exogenous feeding, whether fish ontogeny is `saltatory' or `gradual', and whether larvae are eliminated in some fishes with direct development. The keynote paper of this volume reviews the main topics within contemporary paradigms and the final paper concludes that the onset of the juvenile period can be identified in some species, but precision remains problematic, emphasizing the need for further research in this dynamic area of fish biology.

• development
• environment
• morphology
• ontogeny
• phenotype
• physiology
• plankton
• Fish and Wildlife Biology

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