When do fishes become juveniles When do fishes become juveniles

The outcome of metamorphosis is that the fish turns into a juvenile. Evidence to the fact that it is possible to learn when fish become juvenile has been provided by several participants of the workshop. They determined the onset of the ...

Author: G.H. Copp

Publisher: Springer Science & Business Media

ISBN: 9789401736787


Page: 286

View: 783

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.

Proceedings of a Workshop on Egg Larval and Juvenile Stages of Fish in Atlantic Coast EstuariesProceedings of a Workshop on Egg Larval and Juvenile Stages of Fish in Atlantic Coast Estuaries

Such comparisons can be useful in relating an unknown larval form to recognizable juveniles and adults . For example , most larval and adult clupeiform fishes tend to be slender and elongated .

Author: Anthony L. Pacheco


ISBN: UCSD:31822020698718


Page: 338

View: 355

The Physiology of Developing Fish Viviparity and Posthatching JuvenilesThe Physiology of Developing Fish Viviparity and Posthatching Juveniles

The ability of young fish to detect chemical stimuli during these early ontogenetic periods, when they are still hidden ... in the environment by fish in early ontogeny can have a variety of effects on its behavior, which can either be ...


Publisher: Academic Press

ISBN: 0080585345


Page: 436

View: 992

FROM THE PREFACE: Dramatic changes occur in the physiology of most animals during their development. Among the vertebrates, birds are entirely oviparous, live for variable periods in a cleidoic egg, and show fundamental alterations in excretion, nutrition, and respiration at the time of hatching. In contrast, the eutherian mammals are all viviparous, depend on the maternal circulation and a specialized placenta to provide food, exchange gases, and discharge wastes. The physiology of both mother and fetus is highly specialized during gestation and changes fundamentally at the time of birth. Fishes exemplify both the oviparous and the viviparous modes of development, with some examples that are intermediate between the two. In these two volumes, selected reviews of many, but not all, aspects of development are presented. The chapters in Part A relate to the physiology of eggs and larvae; those in Part B concern viviparity and the physiology of posthatching juvenile fishes.

Distribution and Abundance of Fishes and Invertebrates in Central Gulf of Mexico EstuariesDistribution and Abundance of Fishes and Invertebrates in Central Gulf of Mexico Estuaries

Juveniles are typically associated with vegetation in estuaries , particularly seagrass beds and mangroves . ... Estuaries can be loosely categorized by their physical and chemical characteristics and their associated species ...

Author: United States. National Ocean Service


ISBN: UCSD:31822007466733


Page: 82

View: 125

Endangered Species Act Section 7 ConsultationEndangered Species Act Section 7 Consultation

Based on the results of bypass studies , guidance devices and bypass system components can be redesigned , modified , or deployed using specific configurations to improve juvenile fish passage . ESA - listed juvenile fish will be ...

Author: United States. National Marine Fisheries Service


ISBN: UCR:31210018660637



View: 954

Ecology of Fishes on Coral ReefsEcology of Fishes on Coral Reefs

For juvenile traits, morphological measurements can be made directly, but to examine the linkages from larval life to juvenile life, otolith microstructure analysis is necessary. Cohorts of young fish can be tracked by collecting ...

Author: Camilo Mora

Publisher: Cambridge University Press

ISBN: 9781316300145



View: 585

The local diversity and global richness of coral reef fishes, along with the diversity manifested in their morphology, behaviour and ecology, provides fascinating and diverse opportunities for study. Reflecting the very latest research in a broad and ever-growing field, this comprehensive guide is a must-read for anyone interested in the ecology of fishes on coral reefs. Featuring contributions from leaders in the field, the 36 chapters cover the full spectrum of current research. They are presented in five parts, considering coral reef fishes in the context of ecology, patterns and processes, human intervention and impacts, conservation, and past and current debates. Beautifully illustrated in full-colour, this book is designed to summarise and help build upon current knowledge and to facilitate further research. It is an ideal resource for those new to the field as well as for experienced researchers.

Culture of Nonsalmonid Freshwater Fishes Second EditionCulture of Nonsalmonid Freshwater Fishes Second Edition

Feed efficiency , protein efficiency ratio , and protein retained by the fish all increased as dietary protein increased ... are the principal predators on larvae and small juveniles reared in ponds ; whereas , cannibalism can become a ...

Author: Robert R. Stickney

Publisher: CRC Press

ISBN: 0849386330


Page: 352

View: 748

Culture of Nonsalmonid Freshwater Fishes, 2nd Edition presents an expanded, updated description of important techniques and practices for the culture of some of the most widely cultured nonsalmonid species used for human consumption (channel catfish, tilapia, carp) for stocking freshwater bodies for recreational fishing (bass, walleye, striped bass), and for bait (minnows). This new edition features the latest information on spawning, nutritional requirements, special culture requirements, tolerance to various water quality parameters, and types of diseases that can occur. It is an essential book for all aquaculturalists, agency fishery biologists, and students interested in freshwater aquaculture.

Folia ZoologicaFolia Zoologica

COPP G. H. & KOVÁC V. 1996 : When do fish with indirect development become juveniles ? Can . J. Fish . Aquat . Sci . 53 : 746–752 . DARKOVA . A. 1975 : Behavioral reactions of schooling fishes in individuals of the same species and the ...



ISBN: UOM:39015059060601



View: 199

NWR Maintenance Backlog and Fish InterrelationshipNWR Maintenance Backlog and Fish Interrelationship

However , little work has been done to examine the potential impact of predation by juvenile striped bass on bluefish once juvenile stripers become piscivorous ( fish eaters ) . This work would be important for determining whether the ...

Author: United States. Congress. House. Committee on Resources. Subcommittee on Fisheries Conservation, Wildlife, and Oceans


ISBN: UCR:31210011091509


Page: 112

View: 794