Download or read book Swimbladder Allometry of Selected Midwater Fish Species written by Albert Brooks and published by . This book was released on 1976 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study examines the relationship of fish standard length to swimbladder length, width, and volume. The intra- and inter-specific variation is studied in over 1600 selected mesopelagic fish specimens belonging to 55 species from 9 families. These species are believed to account for most of the volume reverberation occurring throughout a large part of the Sargasso Sea. Regression equations presented in the report allow calculation of swimbladder volumes directly from measurements of fish standard length for 55 species of midwater fish. Additional equations allow the calculation of swimbladder length and width from measurements of the standard lengths of these same species. It is shown that for 40 species, bladder volume increases with increasing standard length. Slopes of the regression lines for 14 species are shown to be insignificant from zero. For one species, bladder volume decreases slightly with increasing standard length. Results of the study demonstrate that equations currently in use overestimate the volumes of the swimbladders and thus acoustic cross sections of many midwater fish species.

Download or read book A Review of the World Resources of Mesopelagic Fish written by J. Gjøsaeter and published by Food & Agriculture Org.. This book was released on 1980 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fish species can be called mesopelagic if it spends the day in the mesopelagic zone. The mesopelagic zone has been defined in different ways based on depth, temperature and light regimes. For the present purpose, depth seems to be the best criterion and mesopelagic fish can thus be defined as species generally spending the day at depths between approximately 200 and 1 000 m. Generally they perform a diel migration, coming to the upper 200 m or even to the surface during the night. The present report briefly reviews the systematics ecology and life history of important groups of mesopelagic fish. Further, some methods used for abundance estimation of these fish are described and discussed. The bulk of the report reviews the present knowledge of abundance and species composition of mesopelagic fish in each of the FAO statistical areas. Although the data in most cases are few, an attempt has been made to give tentative estimates of the biomass and production in the various areas. When available, information on the life history of the most important species in each area is also given.

Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 1989 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scale Pattern Estimates of Origin of Coho Salmon Taken in the Japanese Traditional Landbased Driftnet Salmon Fishery in 1990 written by Robert Victor Walker and published by . This book was released on 1991 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reference written by and published by . This book was released on 1979 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book FAO Fisheries Technical Paper written by Food and Agriculture Organization of the United Nations and published by . This book was released on 1980 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Oceanic Sound Scattering Prediction written by Neil R. Andersen and published by Plenum Publishing Corporation. This book was released on 1977 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Marine Science written by and published by . This book was released on 1974 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Actes Du Symposium written by and published by . This book was released on 2003 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1976 with total page 1350 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Journal of the Acoustical Society of America written by Acoustical Society of America and published by . This book was released on 2001 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ichthyology Handbook written by B.G. Kapoor and published by Springer Science & Business Media. This book was released on 2004-03-11 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, progress in fish biology has advanced at an unprecedented rate and has led to many breakthroughs in the field. This book provides a wealth of information on the strategies that fish adopt with respect to waters with markedly different physical and chemical characteristics. It shows how their physiology, behaviour and lifestyles are adapted to exploit particular niches and gives comprehensive insight into fish life under extreme conditions. The readers are introduced to the ways in which fish exemplify many phenomena of general biological interest - the existence of competitors, chaos, and predator-prey interaction. Fish pathology as well as the components of the immune system are addressed. In this book, original and at times controversial views are presented, areas which have so far received inadequate attention are highlighted and avenues for further research are suggested.

Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1976 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physiological Adaptations to Swimming in Fish written by Josep V. Planas and published by Frontiers Media SA. This book was released on 2017-08-16 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Swimming is an integral part of the life history of many fish species as is intimately linked with their ability to express feeding and predator avoidance behaviors, habitat selection and environmental preferences, social and reproductive behaviors as well as migratory behaviors. Therefore, swimming is an important determinant factor of fitness in a true Darwinian sense and, not surprisingly, swimming performance has been often used as a measure of physiological fitness in fish. The main aim of this Research Topic is to showcase some of the current studies designed to improve our understanding of the physiological energetic and metabolic requirements of swimming and of the adaptive responses to swimming in fish.

Download or read book Biology of Subterranean Fishes written by Eleonora Trajano and published by CRC Press. This book was released on 2010-05-20 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: In most habitats, adaptations are the single most obvious aspects of an organism's phenotype. However, the most obvious feature of many subterranean animals are losses, not adaptations. Even Darwin saw subterranean animals as degenerates: examples of eyelessness and loss of structure in general. For him, the explanation was a straightforward Lamarc

Download or read book Synopsis of Biological Data on the Chub Mackerel Scomber Japonicus Houttuyn 1782 written by José J. Castro Hernández and published by Food & Agriculture Org.. This book was released on 2000 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chub or Spanish mackerel (Scomber japonicus) is a very important species in commercial and artisanal fisheries throughout the world. This synopsis brings together quantitative and qualitative information on various aspects of the mackerel's biology, ecology, stocks and utilisation, to improve knowledge of the species and help maintain it as an important food resource.