Download or read book Phylogeny and Genetic Analysis of Adult and Juvenile Blue Rockfish Sebastes Mystinus and Other Members of the Subgenus Sebastosomus written by Martha O. Burford and published by . This book was released on 2007 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phylodemography of the Blue Rockfish Sebastes Mystinus from California to Washington written by Jason Marc Cope and published by . This book was released on 2002 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evolutionary Processes Contributing to Population Structure in the Rockfishes of the Subgenus Rosicola written by John Edward Budrick and published by . This book was released on 2016 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was undertaken to identify population structure in the three rockfish species of the subgenus Rosicola through genetic analysis of six microsatelite loci applied to individuals sampled from 13 locations across the range of each species from Vancouver, British Columbia and San Martin Island, Mexico. Sampling each species throughout their respective ranges allowed for a more comprehensive and conclusive analysis of structure to inform proper stratification of stock assessments, catch tracking and management of these stocks. In addition, modeling potential evolutionary scenarios and testing for evolutionary processes shaping the current population structure were undertaken to better understand factors contributing to population structure and speciation in the subgenus. Results of this study were compared to previous research on members of this and other subgenera within the genus Sebastes to identify concordance in the phylogeography of subgenera or consistent processes between species indicative of common mechanisms contributing to genetic variation. Patterns observed were used to infer prioritization of future testing for population structure in the genus Sebastes and research to determine whether they are predictive. No significant population structure was identified in the canary rockfish S. pinniger (Gill 1864) or the sunset rockfish S. crocotulus (Hyde et al. 2008). Three genetically distinct genetic clusters indicative of separate populations were identified in the vermilion rockfish S. miniatus (Jordan and Gilbert 1880) and population structure correlated with latitude and depth. While populations were found to overlap in their distribution to some extent, population structure was consistent with the boundary between the San Diegan and Oregonian biogeographic provinces near Point Conception, California. Additional population structure in the Southern California Bight south of Point Conception was correlated with adult depth distribution with a break around 60 m (30 fathoms (fm)). Assignment tests indicated that the young of year of each population as well as S. miniatus co-occur and reside in kelp forests before making ontogenetic migration to deeper depths with age. The deepest distributed of these clusters commonly occurs in depths of up to 100 m (50 fm), beyond which S. crocotulus was the most common species (Hyde et al. 2007). This population structure related to depth poses issues for stratification of historical data used in stock assessment and allocation of catch to each population as identifying characteristics have not been identified and management is already confounded by the presence of the recently identified cryptic species S. crocotulus. Previous studies hypothesized that speciation between S. crocotulus and S. miniatus was the result of paedomorphsis in the form of concatenated migration to deeper depth isolating populations by depth arising from the greater area of nearshore habitat around the channel islands during early Pliocene glaciations when sea level falls as much as 300 ft. around 2.3 MYA (Hyde et al. 2008). Tests were conducted for repetition of such a pattern in forming population structure observed in S. miniatus. Timing of divergence in S. miniatus populations identified using assignment tests was estimated to be in the late Pleistocene only 102,429 (95% CI: 22,884 - 248,933) thousand years ago between clusters 1 and 2 and 255,141 (95% CI: 80,080 - 592,847) thousand years ago for their common ancestor and cluster 3. This is consistent with timing of glaciations, but results indicate northward expansion of a population, which may have occurred during an interglacial period. Our analyses indicate that mutation contributes significantly to population structure between species in the subgenus, but does not contribute to population structure in S. miniatus indicating that it is due to more recent drift or selection alone. Population structure in S. miniatus consistent with northward migration of S. miniatus with lower genetic diversity indicative of a founder effect and private alleles accumulated in the time since divergence. No signal of bottleneck was present in any of the species or populations, though a model reflecting a reduction in population size in the northern population was found to have a high likelihood and posterior probability in Approximate Bayesian Computation analysis of potential evolutionary scenarios. It is possible that reductions in population size occurred too many generations ago to be detected using methods based on relationships between number of alleles and heterozygosity, given expansion of the population since its initial isolation. The results of modeling evolutionary processes indicated potential for gene flow between the northern population and deeper southern population potentially resulting in the shallow southern population. This may be the result of shared alleles from incomplete lineage sorting rather than admixture, or admixture occurred in the distant past as little evidence hybridization was observed in tests for individuals of hybrid classes. The southern shallow population had higher genetic diversity indicating that it may be an older stable population, in potential glacial refugia to the south. These results are also consistent with the possibility that population structure in S. miniatus as the result of northward expansion during the interglacial period. Though the presence of a distinct deeper population in the southern California bight is consistent with paedomorphosis posed as the mechanism resulting in divergence between S. miniatus and S. crocotulus in Hyde et al. (2008), the processes leading to the division of adults on the basis of depth is still uncertain between the shallower and deeper southern population. We postulated that migration or shifts in abundance over time to glacial refugia in the south during glaciations may be associated with shifts to deeper depths to align with lower temperatures experienced at higher latitudes during the interglacial. Adults of each population would be potentially isolated from the shallower distributed progenitor taking advantage of ample nearshore habitat in the Southern California Bight during glaciations (Jacobs et al. 2007, Hyde et al. 2008). Having shifted abundance to the south and taken on adaptations to deeper depths, the now more deeply distributed population may remain isolated from the southerly shallow populations. While concordance was imperfect, analogous structure in other Subgenera within the Sebastes including the Sebastosomas (Burford and Bernardi 2008), Pteropodus (Li et al. 2006) and Sebastomus (Rocha-Oliveras et al. 1999) that reflect population structure north and south of Point Conception as well as cryptic population structure with depth in cowcod (Hess et al. 2014), which we observed in the Rosicola. In other subgenera, differentiation is commonly accompanied by color variation and many of the sister species with similar indices of differentiation to populations identified in S. miniatus are identified as separate species due to their disparate coloration. This may in part be the result of sexual selection facilitated by internal fertilization (Gunderson and Vetter 2006). Commonalities provide guidance on prioritizing future research to focus on species with distributions bridging Point Conception and a broad range of depth distributions. In addition, species with variable coloration should be considered for analysis as the line between species may be blurry but somewhat visible to the eye, needing only be confirmed by genetic analysis that can detect differentiation that in this case was indicative of a relatively recently diverged sister species (Frable et al. 2015, Narum et al. 2004). Nearshore species that release their larvae in the "sticky water" closer to shore that is slower moving due to turbulence and shear forces slowing its movement in the prevailing currents (Gunderson and Vetter 2006; Berntson and Moran 2009). This may contribute to maintenance of populations structure due to relatively inhibited larval transport compared to congeners in deeper waters spawning during periods of stronger flow of currents along the coast. These results provide guidance on selection of species for further analysis within the subgenus to identify what might be population structure or cryptic species that should be accounted for in stock assessments and management where possible. Nearshore species with large ranges bridging Point Conception, California, spawning in the spring during maximal upwelling, with broad depth range and with a large degree of variability in coloration are most likely to harbor genetic variation of interest to management and their analysis may provide further understanding the speciation process in this diverse genus.
Download or read book Regional Variation in Year class Structure of Blue Rockfish Sebastes Mystinus written by Paul Gundelfinger and published by . This book was released on 2005 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Fishes of Alaska written by Barton Warren Evermann and published by . This book was released on 1907 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Rockfishes of the Northeast Pacific written by Milton S. Love and published by Univ of California Press. This book was released on 2002 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A major landmark contribution to fisheries science and fish ecology. Rockfish populations are in a severe decline throughout the Northeastern Pacific, and the need for a deep understanding of their biology, ecology, and management has never been more critical. This book addresses all aspects of our current knowledge of this diverse and interesting group of groundfish species, and it is written clearly and with humor. An outstanding work!"--Larry G. Allen, California State University, Northridge "Quite simply the best account ever of the fascinating, diverse, and valuable rockfishes. If you are interested in the marine fishes of the Pacific Coast, you need this book."--Peter B. Moyle, author of Inland Fishes of California
Download or read book The Genera of Fishes written by David Starr Jordan and published by . This book was released on 1917 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fish Invasions of the Mediterranean Sea written by Daniel Golani and published by . This book was released on 2010 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological invasions are one of the major factors affecting ecosystems throughout the world. The Mediterranean Sea is one of the most dynamic marine ecosystems in the world and is subject to ongoing invasions of marine organisms. This book focuses on fish invasions of the Mediterranean and presents the latest research on this subject. This comprehensive book includes chapters written by experts on paleontology, climate change, zoogeography, genetics, parasitology, biological monitoring and conservation, as well as chapters devoted to regional and local issues of countries surrounding the Mediterranean, written by experts from those countries. The editors of this book, Dr. Daniel Golani and Brenda Appelbaum-Golani of the Hebrew University of Jerusalem, have conducted ichthyological research for over three decades and have published numerous books and articles on fish invasions and biodiversity.
Download or read book The Ecology of Marine Fishes written by Dr. Larry G. Allen and published by Univ of California Press. This book was released on 2006-02-15 with total page 1353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine fishes have been intensively studied, and some of the fundamental ideas in the science of marine ecology have emerged from the body of knowledge derived from this diverse group of organisms. This unique, authoritative, and accessible reference, compiled by 35 luminary ecologists, evolutionary biologists, and ichthyologists, provides a synthesis and interpretation of the large, often daunting, body of information on the ecology of marine fishes. The focus is on the fauna of the eastern Pacific, especially the fishes of the California coast, a group among the most diverse and best studied of all marine ecosystems. A generously illustrated and comprehensive source of information, this volume will also be an important launching pad for future research and will shed new light on the study of marine fish ecology worldwide. The contributors touch on many fields in biology, including physiology, development, genetics, behavior, ecology, and evolution. The book includes sections on the history of research, both published and unpublished data, sections on collecting techniques, and references to important earlier studies.
Download or read book Molecular Systematics of Fishes written by Thomas D. Kocher and published by Elsevier. This book was released on 1997-07-10 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sequenced biological macromolecules have revitalized systematic studies of evolutionary history. Molecular Systematics of Fishes is the first authoritative overview of the theory and application of these sequencing data to fishes. This volume explores the phylogeny of fishes at multiple taxonomic levels, uses methods of analysis of molecular data that apply both within and between fish populations, and employs molecule-based phylogenies to address broader questions of evolution. Targeted readers include ichthyologists, marine scientists, and all students, faculty, and researchers interested in fish evolution and ecology and vertebrate systematics. Focuses on the phylogeny and evolutionary biology of fishes Contains phylogenies of fishes at multiple taxonomic levels Applies molecule-based phylogenies to broader questions of evolution Includes methods for critique of analysis of molecular data
Download or read book Marine Metapopulations written by Jacob P. Kritzer and published by Elsevier. This book was released on 2010-07-20 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technological improvements have greatly increased the ability of marine scientists to collect and analyze data over large spatial scales, and the resultant insights attainable from interpreting those data vastly increase understanding of poplation dynamics, evolution and biogeography. Marine Metapopulations provides a synthesis of existing information and understanding, and frames the most important future directions and issues. First book to systematically apply metapopulation theory directly to marine systems Contributions from leading international ecologists and fisheries biologists Perspectives on a broad array of marine organisms and ecosystems, from coastal estuaries to shallow reefs to deep-sea hydrothermal vents Critical science for improved management of marine resources Paves the way for future research on large-scale spatial ecology of marine systems
Download or read book A Field Guide to Pacific Coast Fishes written by William N. Eschmeyer and published by Houghton Mifflin Harcourt. This book was released on 1983 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than 600 species are described in detail, with more than 525 illustrations. This is the guide for quick, reliable identification of fishes that you'll encounter while fishing, snorkeling, diving, or even strolling along a Pacific Coast beach.
Download or read book The Fishes of North and Middle America written by David Starr Jordan and published by . This book was released on 1898 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meselson Stahl and the Replication of DNA written by Frederic Lawrence Holmes and published by Yale University Press. This book was released on 2008-10-01 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1957 two young scientists, Matthew Meselson and Frank Stahl, produced a landmark experiment confirming that DNA replicates as predicted by the double helix structure Watson and Crick had recently proposed. It also gained immediate renown as a “most beautiful” experiment whose beauty was tied to its simplicity. Yet the investigative path that led to the experiment was anything but simple, Frederic L. Holmes shows in this masterful account of Meselson and Stahl’s quest. This book vividly reconstructs the complex route that led to the Meselson-Stahl experiment and provides an inside view of day-to-day scientific research--its unpredictability, excitement, intellectual challenge, and serendipitous windfalls, as well as its frustrations, unexpected diversions away from original plans, and chronic uncertainty. Holmes uses research logs, experimental films, correspondence, and interviews with the participants to record the history of Meselson and Stahl’s research, from their first thinking about the problem through the publication of their dramatic results. Holmes also reviews the scientific community’s reception of the experiment, the experiment’s influence on later investigations, and the reasons for its reputation as an exceptionally beautiful experiment.
Download or read book Intertidal Fishes written by Michael H. Horn and published by Elsevier. This book was released on 1998-11-03 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intertidal Fishes describes the fishes inhabiting the narrow strip of habitat between the high and low tide marks along the rocky coastlines of the world. It analyzes the specialized traits of these fishes that have adapted to living in the dynamic and challenging space where they are alternately exposed to the air and submerged in water with the ebb and flow of the tides. This book provides a comprehensive account of fishes largely overlooked in many previous studies of intertidal organisms and emphasizes how they differ from fishes living in other deeper-water habitats. Coverage includes air breathing, movements and homing, sensory systems, spawning and parental care, feeding habits, community structure, systematic relationships, distribution patterns, and the fossil record in the intertidal zone. Written by an international team of 21 experts on intertidal fish biology Worldwide coverage of intertidal fishes Comprehensive phylogenetic listing of all fish families with intertidal members Global biogeographic analysis involving over 700 species from 86 sites Outlines field and laboratory methods pertinent to studying intertidal fishes Thorough ecological coverage with chapters on vertical distribution, movements and homing, reproduction, feeding, and community structure Covers the physiology of aerial and aquatic respiration, osmoregulation, and sensory systems
Download or read book Structural and Evolutionary Genomics written by Giorgio Bernardi and published by Gulf Professional Publishing. This book was released on with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural genomics is the study of the DNA of living organisms. Evolutionary genomics is the study of the history of the genome. These subjects are closely interlinked. They are approached in this book using as a guideline the investigations carried out in the author's laboratory, relevant literature is critically reviewed and some general conclusions are presented. The author and his collaborators have studied a vast number of genomes, ranging from prokaryotes to human, using different approaches, including physical chemistry of DNA, viral integration and molecular cytogenetics.
Download or read book Genetics and Evolution of Aquatic Organisms written by A. Beaumont and published by Springer Science & Business Media. This book was released on 1994-03-31 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together, for the first time, a wide range of up-to-the-minute and traditional techniques and approaches to the study of genetics of organisms living in freshwater or marine habitats. Carefully edited chapters are headed by broad review articles against which are set a number of more specific experience papers which demonstrate the breadth and range of approaches currently being undertaken.
