Tropical Fish Otoliths Information for Assessment Management and Ecology

Author: Bridget S. Green
Publisher: Springer Science & Business Media
ISBN: 140205775X
Format: PDF, Docs
Download Now
Techniques and theory for processing otoliths from tropical marine fish have developed only recently due to an historic misconception that these organisms could not be aged. Otoliths are the most commonly used structures from which daily, seasonal or annual records of a fish’s environmental history are inferred, and are also used as indicators of migration patterns, home range, spatial distribution, stock structure and life history events. A large proportion of projects undertaken on tropical marine organisms involve removal and processing of calcified structures such as otoliths, statoliths or vertebrae to retrieve biological, biochemical or genetic information. Current techniques and principles have evolved rapidly and are under constant modification and these differ among laboratories, and more particularly among species and within life history stages. Tropical fish otoliths: Information for assessment, management and ecology is a comprehensive description of the current status of knowledge about otoliths in the tropics. This book has contributions from leading experts in the field, encompassing a tropical perspective on daily and annual ageing in fish and invertebrates, microchemistry, interpreting otolith microstructure and using it to back-calculate life history events, and includes a treatise on the significance of validating periodicity in otoliths.

The Biology of Gobies

Author: Robert Patzner
Publisher: CRC Press
ISBN: 1439862338
Format: PDF, ePub
Download Now
Among all vertebrates, gobies are second in diversity only to the teleost family Cyprinidae. The Gobiidae consists of more than 200 genera and nearly 2,000 species and make up the largest family of marine fishes. Gobies account for as much as 50% of the energy flow in coral reef communities. Their small size, ability to adapt to numerous ecological niches and to be bred in aquaria has led to numerous studies both in the field and laboratory. Gobies are found from above the high tide line to depths of over 1,100 m. Some species are found only within caves, others deep inside sponges, and some others climb waterfalls to return to their native streams. They vary reproductively from gonochoric to hermaphrodite, monogamy to polygyny and promiscuity, some have short life spans and reproduce only once while others have longer life spans reproducing one or more times per year. The Biology of Gobies written by over 30 experts from 15 countries summarizes what is known about the systematics, ecology, zoogeography, and general biology of the Gobiiformes. This foundation will provide the basic information necessary for future studies.

Introductory Fisheries Analyses with R

Author: Derek H. Ogle
Publisher: CRC Press
ISBN: 1315360187
Format: PDF, ePub, Mobi
Download Now
A How-To Guide for Conducting Common Fisheries-Related Analyses in R Introductory Fisheries Analyses with R provides detailed instructions on performing basic fisheries stock assessment analyses in the R environment. Accessible to practicing fisheries scientists as well as advanced undergraduate and graduate students, the book demonstrates the flexibility and power of R, offers insight into the reproducibility of script-based analyses, and shows how the use of R leads to more efficient and productive work in fisheries science. The first three chapters present a minimal introduction to the R environment that builds a foundation for the fisheries-specific analyses in the remainder of the book. These chapters help you become familiar with R for basic fisheries analyses and graphics. Subsequent chapters focus on methods to analyze age comparisons, age-length keys, size structure, weight-length relationships, condition, abundance (from capture-recapture and depletion data), mortality rates, individual growth, and the stock-recruit relationship. The fundamental statistical methods of linear regression, analysis of variance (ANOVA), and nonlinear regression are demonstrated within the contexts of these common fisheries analyses. For each analysis, the author completely explains the R functions and provides sufficient background information so that you can confidently implement each method. Web Resource The author’s website at http://derekogle.com/IFAR/ includes the data files and R code for each chapter, enabling you to reproduce the results in the book as well as create your own scripts. The site also offers supplemental code for more advanced analyses and practice exercises for every chapter.

Faszination Meeresforschung

Author: Gotthilf Hempel
Publisher: Springer-Verlag
ISBN: 366249714X
Format: PDF, Docs
Download Now
In diesem Buch berichten 95 Wissenschaftlerinnen und Wissenschaftler über ihre Forschung im Ozean und an den Küsten. Sie führen den Leser von den eisbedeckten Polarmeeren über die Nord- und Ostsee bis zu den Seegraswiesen, tropischen Mangroven und Korallenriffen. Die Beiträge veranschaulichen die Vielfalt der Lebensgemeinschaften zwischen Strand und Tiefsee. Das Größenspektrum der Organismen reicht von Walen und Fischen über Planktonkrebse und Muscheln bis zu Kieselalgen und Bakterien. Die globalen – vom Leben im Meer bestimmten – Stoffkreisläufe werden ebenso behandelt wie die molekularbiologischen Anpassungen der Mikroorganismen, und hier sind auch die größten methodischen Fortschritte zu verzeichnen. Zu den spannenden Themen der angewandten Meeresforschung gehören die Überfischung und die nachhaltige Nutzung der Meere, die Gefährdung durch Schad- und Nährstoffeinträge, die Einschleppen fremder Organismen und die Zerstörung von Lebensräumen. Vielfältig und bereits deutlich nachweisbar sind die Einflüsse des globalen Klimawandels auf das Leben im Meer. Forschungsschiffe, Unterwasser-Roboter, Gensonden und Datenbanken, aber auch mathematische Modelle und naturnahe Experimente sind wichtige Werkzeuge der Meeresbiologen. Exkurse über die Geschichte und Struktur der meeresbiologischen Forschung in Deutschland runden die Übersicht ab. In 48 selbständigen Beiträgen fügt sich die Vielfalt moderner, meeresökologischer Forschung zu einem faszinierenden Gesamtbild zusammen. Das Buch richtet sich an Lehrende und Lernende und an alle, die sich für das Meer und seine Bewohner, für modernes Ressourcenmanagement und marinen Naturschutz interessieren.