Download or read book New Apseudomorph Taxa Crustacea Tanaidacea of the World Ocean written by Modest Guțu and published by . This book was released on 2006 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Marine Biodiversity of Costa Rica Central America written by Ingo S. Wehrtmann and published by Springer Science & Business Media. This book was released on 2008-12-28 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: Life began in the sea, and even today most of the deep diversity of the planet is marine. This is often forgotten, especially in tropical countries like Costa Rica, renowned for their rain forests and the multitude of life forms found therein. Thus this book focusing on marine diversity of Costa Rica is particularly welcome. How many marine species are there in Costa Rica? The authors report a total of 6,777 species, or 3. 5% of the world’s total. Yet the vast majority of marine species have yet to be formally described. Recent estimates of the numbers of species on coral reefs range from 1–9 million, so that the true number of marine species in Costa Rica is certainly far higher. In some groups the numbers are likely to be vastly higher because to date they have been so little studied. Only one species of nematode is reported, despite the fact that it has been said that nematodes are the most diverse of all marine groups. In better studied groups such as mollusks and crustaceans, reported numbers are in the thousands, but even in these groups many species remain to be described. Indeed the task of describing marine species is daunting – if there really are about 9 million marine species and Costa Rica has 3. 5% of them, then the total number would be over 300,000. Clearly, so much remains to be done that new approaches are needed. Genetic methods have en- mous promise in this regard.

Download or read book Gulf of Mexico Origin Waters and Biota written by Darryl L. Felder and published by Texas A&M University Press. This book was released on 2009-06-29 with total page 1449 pages. Available in PDF, EPUB and Kindle. Book excerpt: This landmark scientific reference for scientists, researchers, and students of marine biology tackles the monumental task of taking a complete biodiversity inventory of the Gulf of Mexico with full biotic and biogeographic information. Presenting a comprehensive summary of knowledge of Gulf biota through 2004, the book includes seventy-seven chapters, which list more than fifteen thousand species in thirty-eight phyla or divisions and were written by 138 authors from seventy-one institutions in fourteen countries. This first volume of Gulf of Mexico Origin, Waters, and Biota, a multivolumed set edited by John W. Tunnell Jr., Darryl L. Felder, and Sylvia A. Earle, provides information on each species' habitat, biology, and geographic range, along with full references and a narrative introduction to the group, which opens each chapter.

Download or read book Systematic Novelties of the Enigmatic Universe of the Leptocheliids Crustacea Tanaidacea written by Modest Guțu and published by ePublishers & Editura Coresi. This book was released on with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: By the present contribution by Modest Guţu, the family Leptocheliidae enriched with 29 new taxa (a subfamily, seven genera and 21 species), as it results from the list, hereinafter. Subfamily Leptocheliinae Lang, 1973: - Genus Alloleptochelia n. g., with the species: A. angusta n. sp., A. heardi n. sp., A. insolita n. sp., A. monotricha n. sp. and A. multiarticulata n. sp.; - Genus Chondrochelia n. g., with the species: C. andersoni n. sp., C. baliensis n. sp., C. dentitruncata n. sp. and C. distincta n. sp.; - Genus Kalloleptochelia n. g., with the species: K. maiorina n. sp., K. pauxilla n. sp. and K. robusta n. sp.; - Genus Leptochelia Dana, 1849, with the species: L. afrieurina n. sp. and L. splendida n. sp.; - Genus Paraleptochelia n. g., with the species P. magnispina n. sp.; - Genus Permixtimella n. g., with the species P. oculifurcillata n. sp.; - Genus Poorea Edgar, 2012, with the species P. obscurus; n. sp. and P. tanzaniensis n. sp. Subfamily Konariinae Bamber, 2013: - Genus Antiparus n. g. with the species A. longisetosus n. sp. Subfamily Metaleptocheliinae nov.: - Genus Metaleptochelia n. g. with the species M. estafricana n. sp. and M. vestpacifica n. sp. Also, the female of the species Leptochelia forresti (Stebbing, 1896), unknown up to now, is described and illustrated for the first time, and the male is minutely redescribed. It is for the first time when a large number of taxa (six genera and 12 species) of the family Leptocheliidae are minutely described on the basis of both sexes, this allowing the establishing of the common morphological features in the males and females of the same species, as well of those present at the genus level. The males of the genus Antiparus n. g. and of the species Antiparus longisetosus n. sp., Poorea obscurus n. sp. and P. tanzaniensis n. sp. and the females of the genus Kalloleptochelia n. g. and of the species Alloleptochelia insolita n. sp., A. multiarticulata n. sp., Kalloleptochelia maiorina n. sp., K. pauxilla n. sp., K. robusta n. sp. and Leptochelia afrieurina n. sp. are unknown. The identification keys of the leptocheliid subfamilies are presented, for the genera of the subfamilies Leptocheliinae and Konariinae, as well as the identification keys of the species of the genera Leptochelia, Alloleptochelia n. g., Kalloleptochelia n. g., Makassaritanais Guţu, 2012, Metaleptochelia n. g. and Poorea Edgar, 2012, and of the new species of the genus Chondrochelia n. g. Considering that the females and males of the species of the family Leptocheliidae have different morphological features, the key of the genera of the subfamily Leptocheliinae (the most numerous within the family, having 20 genera) refers both to the common features of the two sexes (when it was possible) and separately, for females and males allowing a more precise identification. The studied material provided from the Indo-West-Pacific shallow waters. The comments from the Addendum refer to the recent English version of the chapter Order Tanaidacea (revised and updated by Kim Larsen after the original text co-authored by Modest Guţu and the late Jürgen Sieg), from the well-known Traité de Zoologie (Tome VII, Fascicule III A, Crustacés Pracarides), founded by P.-P. Grassé. That new version contains numerous unacceptable mistakes since the author was not consulted or at least informed about the re-publication, as it would have been ethically appropriate.

Download or read book Biodiversity and Distribution of Benthic Invertebrates From Taxonomy to Ecological Patterns and Global Processes written by Marcos Rubal and published by Frontiers Media SA. This book was released on 2022-03-17 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Memoirs of the Queensland Museum written by and published by . This book was released on 2010 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Travaux Du Mus um National D histoire Naturelle Grigore Antipa written by and published by . This book was released on 2008 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Deep sea Tanaidacea Peracarida from the Gulf of Mexico written by Kim Larsen and published by BRILL. This book was released on 2022-01-04 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with a large number of deep-sea taxa of Tanaidacea from the Gulf of Mexico, primarily collected during the Deep Gulf of Mexico Benthos Study and the North Gulf of Mexico Continental Shelf Study. Four new genera, Aramaturatanais, Caudalonga, Insociabilitanais, and Pseudoarthrura are described. Twenty-one new species belonging to those new genera and to Anarthruropsis, Araphura, Araphuroides, Chauliopleona, Filitanais, Leptognathia, Leptognathiella, Leviapseudes, Meromonakantha, Paragathotanais, Paranarthrura, Robustochelia, and Stenotanais are described as well, in many cases by both sexes. The female of Paragathotanais typicus and the male Pectinapseudes magnus are described herein for the first time. The genus Crurispina is renamed Spinitanaopsis as its original name was found to be preoccupied. Keys are presented for the genera Atlantapseudes, Pectinapseudes, Sphyrapoides, Kudinopasternakia, Paragathotanais, Paranarthrura, Anarthruropsis, Filitanais, Leptognathiella, Mesotanais, Araphura, Araphuroides, Robustochelia, and Stenotanais. Information about distribution and bathymetric range is included. Also, global distribution patterns and dispersal mechanisms applying to the Tanaidacea are discussed. Most deep-sea species appear to be widely distributed and show remarkably wide depth ranges. Misidentification is suggested as the cause of many of those apparently widely distributed tanaidaceans. Wide bathymetric ranges have been recorded for many species, and their apparent pressure tolerance may contribute to facilitating dispersal. The known distribution patterns in the Gulf of Mexico seem merely to reflect sampling effort. In addition to the specific parts, this text gives a review of tanaidacean morphology, anatomy, physiology, ecology, development, reproduction, behaviour, and of other aspects of their biology.

Download or read book Travaux du Mus um d histoire naturelle Grigore Antipa written by Muzeul de Istorie Naturala "Grigore Antipa." and published by . This book was released on 2007 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Memoirs of the Museum of Victoria written by and published by . This book was released on 2007 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Memoirs of Museum Victoria written by and published by . This book was released on 2007 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent and Emerging Innovations in Deep Sea Taxonomy to Enhance Biodiversity Assessment and Conservation written by Stefanie Kaiser and published by Frontiers Media SA. This book was released on 2022-10-25 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Perspectives on Marine Environmental Change in Hong Kong and Southern China 1977 2001 written by Brian Morton and published by Hong Kong University Press. This book was released on 2003-01-01 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, eminent marine scientists and local researchers who have attended the workshops express their views on the many changes in Hong Kong's surrounding waters.

Download or read book Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut written by Hamburgisches Zoologisches Museum und Institut and published by . This book was released on 2000 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lagoons of Sri Lanka written by Silva, E. I. L. and published by IWMI. This book was released on 2013-03-01 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sri Lanka, an island in the Indian Ocean, has lagoons along 1,338 km of its coastline. They experience low-energy oceanic waves and semidiurnal microtidal currents. The Sri Lankan coastal lagoons are not numerous but they are diverse in size, shape, configuration, ecohydrology, and ecosystem values and services. The heterogeneous nature, in general, and specific complexities, to a certain extent, exhibited by coastal lagoons in Sri Lanka are fundamentally determined by coastal and adjoining hinterland geomorphology, tidal fluxes and fluvial inputs, monsoonal-driven climate and weather, morphoedaphic attributes, and cohesive interactions with human interventions.Most coastal lagoons in Sri Lanka are an outcome of mid-Holocene marine transgression and subsequent barrier formation and spit development enclosing the water body between the land and the sea. This process has varied from one coastal stretch to another due to wave-derived littoral drift, sediment transport by tidal fluxes, fluvial inputs and wave action or, in other words, sea-level history, shore-face dynamics and tidal range as the three major factors that control the origin and maintenance of the sandy barrier, the most important features for the formation and evolution of coastal lagoons with their landward water mass. In certain stretches of Sri Lanka’s coastline, formation of the barrier spit was very active due to shore-face dynamics that resulted in chains of shore parallel, elongated lagoons. They are among the most productive in terms of ecosystem yield and show some similarities to large tropical lagoons with respect to sea entrance, zonation, biodiversity and ecosystem services. However, some of them become seasonally hypersaline due to lack of freshwater input and high evaporation. Functions and processes of some of these water bodies are fairly known. There are a fair number of small back-barrier lagoons of different shapes and sizes whose origin goes back to sea-level history. They are located on low-energy coasts with prominent beach ridges and restricted hinterland geomorphology. Mixing processes of these landward indentations are hindered by elevated sand dunes, and their salinity increases due to poor freshwater input and high evaporation leading to seasonally hypersaline conditions. These sedimented lagoons, primarily confined to the southeastern coast of the island, are biologically the least productive, with limited ecosystem values and services. Another group of moderately elongated semicircular, slightly large lagoons in the same coast, formed exclusively by submergence due to mid-Holocene sea-level rises, do not receive sufficient freshwater input leading to seasonally hypersaline conditions. They are also biologically unproductive but some are ecologically important since they provide habitats conducive to migratory birds. In contrast, some lagoons on the southern coast receive sufficient freshwater via streams draining the wet zone, maintain more estuarine salinities, exhibit rich biodiversity and serve as functional resource units. Lagoons formed by mid-Holocene submergence and recession of water level with simultaneous chain barrier formation on the high energy southwest coast, which includes cliffs, small bays and headlands, show peculiar configurations and link channel characteristics. Some of these irregular water bodies have clusters of small isles and luxuriant mangrove swamps with high biodiversity but not very rich in catadromous finfish and shellfish species due to the restricted nature of the entrance channel and nondistinct salinity gradients. The barrier-built, seasonally hypersaline lagoon complex in the Jaffna Peninsula, the largest lagoon system in the country with multiple perennial entrances show extremely narrow salinity ranges towards the upper limit of salinity. The main lagoon is elongated and the shore parallel to eastward and southward extensions is connected by narrow channels. The other lagoon in the Jaffna Peninsula is elongated, shore parallel and ribbon-shaped and receives tidal water throughout the year but freshwater is received only from precipitation and surface runoff. Even though the lagoons in the peninsula are extremely rich in ecosystem heterogeneity their hydrology and hydrodynamics have been severely disturbed by infrastructural development for transportation and by attempts to create a freshwater river for Jaffna. There are a few virgin lagoons of moderate size also on the northern coast, south of the Jaffna Peninsula on both the east and west sides. They look very typical tropical lagoons rich in biodiversity and biological production but their structure, functions and values are virtually unknown in scientific or socioeconomic terms. The lagoons located on the east coast are not numerous but relatively large in extent. They are also an outcome not only of mid-Holocene sea-level rises but of submerged multi-delta valleys or abandoned paleo estuaries. When inundated, the multi-delta valley configuration became elongated and is shore parallel with a smooth seaward shoreline; both shorelines become irregular when coastal waves are weak, and internal waves are created by the action of local winds. Configuration of a lagoon formed by inundation of an abandoned river valley is irregular with a long entrance channel extended landward. These lagoons are highly productive with a variety of associated ecosystems, large open water areas and wide perennial sea entrances. When the lagoon is too much elongated, zonation is prominent due to fewer entrance effects. Lagoons form a particular type of natural capital which generates use values (fish, shrimp, fuelwood, salt, fodder, ecotourism, anchorage, recreation, etc.) and nonuse values (habitat preservation, biodiversity, ecosystem linkages, etc.) contributing positively towards improving the human well-being. Of many values of lagoons in Sri Lanka, only the extractive values are generally utilized at present, by way of fish and shrimp catches, salt production and use of mangrove for various purposes. Besides, coastal lagoons generate a range of nonextractive use values and nonuse values, which could add towards the total economic value. Misuse has taken place at several instances when “use” adversely affects the status of the resources or the health of the ecosystem due to vulnerability and poverty, population pressure, urbanization, development activities and multi-stakeholder issues. The status of lagoon resources shows that the resources in the majority of Sri Lankan lagoons still remain satisfactory, somewhat good or very good. Nevertheless, concerns for management of lagoons in Sri Lanka exist only where “use values” (extractive values, such as fish and shrimp) exist. There is no evidence of resources management in lagoons for inspirational, scholarly values or tacit knowledge of the same. Management for use values exhibits several stages from zero management to comanagement via community management and state intervention. Most of Sri Lanka’s lagoons have the potential for generating high extractive and nonextractive use values which could improve the human well-being, while maintaining resources sustainability. Unfortunately, these potentials have not been understood or “seen” yet by the relevant authorities, although a few instances of exploring this potential were noticed.

Download or read book Crustacea Tanaidacea of the Antarctic and the Subantarctic written by J?rgen Sieg and published by American Geophysical Union. This book was released on 1986 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 45. About 2700 tanaidaceans from 131 stations collected by scientists on board the R/V Hero at Tierra del Fuego, Isla de los Estados, and along the west coast of the Antarctic Peninsula were studied. A total of 36 species representing 26 genera in 11 families were determined. Of these taxa, four genera, one subgenus, and 12 species are described as new to science. Of the remaining 24 species, only nine were known previously from the area studied. Range extensions are reported for 14 species, only one of which is listed for the Antarctic/Subantarctic region for the first time.

Download or read book Species Diversity of Animals in Japan written by Masaharu Motokawa and published by Springer. This book was released on 2016-11-26 with total page 721 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the status quo of the knowledge about the biodiversity in terrestrial, freshwater, and marine animals that live in Japan. Consisting of some 6,800 islands that are arrayed for approximately 3,500 km from north to south, the Japanese archipelago has a complex history in a paleogeographic formation process over time and harbors rich flora and fauna. This work will contribute to establishing a general biogeographic theory in archipelagoes around continental shelves. Facing the ongoing extinction crisis, one of the most important tasks for our generation is to bequeath this precious natural heritage to future generations. As the first step toward this goal, a species list has been compiled through solid, steady alpha-taxonomic work in each taxon. Furthermore, the phylogeography and population genetic structure for each species is elucidated for deeper understanding of the local fauna, the scientific results of which should be the basis for establishing conservation policies and strategies. Also the problem of alien or introduced species is investigated as another threat to the native fauna.Each of the 27 chapters is written by the most active specialist leading the field, thus readers can acquire up-to-date knowledge of the animal species diversity and their formation process of Japanese animals in the most comprehensive form available. This book is recommended for researchers and students who are interested in species diversity, biogeography, and phylogeography.