Environmental Predictors Of Bottlenose Dolphin Distribution And Core Feeding Densities In Galveston Bay Texas

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Environmental Predictors of Bottlenose Dolphin Distribution and Core Feeding Densities in Galveston Bay, Texas

Author : Maria Paula Teixeira Moreno
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Environmental Predictors of Bottlenose Dolphin Distribution and Core Feeding Densities in Galveston Bay, Texas by : Maria Paula Teixeira Moreno

Download or read book Environmental Predictors of Bottlenose Dolphin Distribution and Core Feeding Densities in Galveston Bay, Texas written by Maria Paula Teixeira Moreno and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal dolphins are often exposed to habitat degradation and direct interactions with humans. Major factors that influence dolphin distribution, critical for conservation concerns, are still poorly understood even for the bottlenose dolphin, the best-studied cetacean. To establish the environmental conditions that best predict occurrence of bottlenose dolphins and high feeding densities in Galveston Bay, I conducted a total of 367 boat surveys in five locations of the estuary, totaling 3,814.77 km of search effort. I counted groups of dolphins and measured surface water temperature, salinity, turbidity, total number of boats, shrimp vessels, and number of seabirds. Using geospatial tools, these data -- along with location, distance to the Gulf of Mexico and water depth -- were analyzed on a 500- m resolution grid. Temporal factors at daily and seasonal scales were also examined. Occurrence was modeled using a Generalized Additive Model and core feeding densities (i.e., feeding densities above 2 SD of the mean) were modeled with a Generalized Linear Model. A total of 1,802 dolphins in 262 groups were detected,56.87% of which were feeding. I found that all factors except warm/cold seasons and turbidity were useful to predict dolphin distribution, which was related non-linearly tomost predictors. Fewer variables were relevant in predicting core feeding densities. These were, in decreasing order of relevance, distance to the Gulf of Mexico, surface water temperature, depth, number of boats, and warm/cold seasons. Feeding was highly clustered and the main core areas, less than approximately 3 km2 wide, were stable across time of day and season. The majority of the occurrences (86.2%) and feeding groups (94%) were situated in two bay locations - Galveston Ship Channel (GSC) and Bolivar Roads (BRD) - that amounted to only one- fifth of the surveyed area. Compared to conditions in GSC and BRD when no dolphins were sighted, feeding cores were deeper and more seabirds were observed. This fine-scale study of bottlenose dolphin distribution may contribute to a better understanding of habitat requirements for coastal dolphins. It also may provide information needed to minimize potential negative impacts to this population caused by human activities.

Habitats and Biota of the Gulf of Mexico: Before the Deepwater Horizon Oil Spill

Author : C. Herb Ward
Publisher : Springer
ISBN 13 : 1493934562
Total Pages : 948 pages
Book Rating : 4.4/5 (939 download)

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Book Synopsis Habitats and Biota of the Gulf of Mexico: Before the Deepwater Horizon Oil Spill by : C. Herb Ward

Download or read book Habitats and Biota of the Gulf of Mexico: Before the Deepwater Horizon Oil Spill written by C. Herb Ward and published by Springer. This book was released on 2017-06-26 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is open access under a CC BY-NC 2.5 license. The Gulf of Mexico is an open and dynamic marine ecosystem rich in natural resources but heavily impacted by human activities, including agricultural, industrial, commercial and coastal development. The Gulf of Mexico has been continuously exposed to petroleum hydrocarbons for millions of years from natural oil and gas seeps on the sea floor, and more recently from oil drilling and production activities located in the water near and far from shore. Major accidental oil spills in the Gulf are infrequent; two of the most significant include the Ixtoc I blowout in the Bay of Campeche in 1979 and the Deepwater Horizon Oil Spill in 2010. Unfortunately, baseline assessments of the status of habitats and biota in the Gulf of Mexico before these spills either were not available, or the data had not been systematically compiled in a way that would help scientists assess the potential short-term and long-term effects of such events. This 2-volume series compiles and summarizes thousands of data sets showing the status of habitats and biota in the Gulf of Mexico before the Deepwater Horizon Oil Spill. Volume 2 covers historical data on commercial and recreational fisheries, with an analysis of marketing trends and drivers; ecology, populations and risks to birds, sea turtles and marine mammals in the Gulf; and diseases and mortalities of fish and other animals that inhabit the Gulf of Mexico.

Northwest Training Range Complex

Author :
Publisher :
ISBN 13 :
Total Pages : 344 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Northwest Training Range Complex by :

Download or read book Northwest Training Range Complex written by and published by . This book was released on 2010 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Dissertation Abstracts International

Author :
Publisher :
ISBN 13 :
Total Pages : 846 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Dissertation Abstracts International by :

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 846 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Marine Mammals of the Gulf of Mexico

Author : Bernd G. Würsig
Publisher : W. L. Moody JR. Natural Histor
ISBN 13 :
Total Pages : 312 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis The Marine Mammals of the Gulf of Mexico by : Bernd G. Würsig

Download or read book The Marine Mammals of the Gulf of Mexico written by Bernd G. Würsig and published by W. L. Moody JR. Natural Histor. This book was released on 2000 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Given in honor of District Governor Hugh Summers and Mrs. Ahnise Summers by the Rotary Club of Aggieland with matching support from the Sara and John H. Lindsey '44 Fund, Texas A & M University Press, 2004.

An Ecosystem Services Approach to Assessing the Impacts of the Deepwater Horizon Oil Spill in the Gulf of Mexico

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309288487
Total Pages : 247 pages
Book Rating : 4.3/5 (92 download)

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Book Synopsis An Ecosystem Services Approach to Assessing the Impacts of the Deepwater Horizon Oil Spill in the Gulf of Mexico by : National Research Council

Download or read book An Ecosystem Services Approach to Assessing the Impacts of the Deepwater Horizon Oil Spill in the Gulf of Mexico written by National Research Council and published by National Academies Press. This book was released on 2013-12-20 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the Gulf of Mexico recovers from the Deepwater Horizon oil spill, natural resource managers face the challenge of understanding the impacts of the spill and setting priorities for restoration work. The full value of losses resulting from the spill cannot be captured, however, without consideration of changes in ecosystem services-the benefits delivered to society through natural processes. An Ecosystem Services Approach to Assessing the Impacts of the Deepwater Horizon Oil Spill in the Gulf of Mexico discusses the benefits and challenges associated with using an ecosystem services approach to damage assessment, describing potential impacts of response technologies, exploring the role of resilience, and offering suggestions for areas of future research. This report illustrates how this approach might be applied to coastal wetlands, fisheries, marine mammals, and the deep sea-each of which provide key ecosystem services in the Gulf-and identifies substantial differences among these case studies. The report also discusses the suite of technologies used in the spill response, including burning, skimming, and chemical dispersants, and their possible long-term impacts on ecosystem services.

Ethology and Behavioral Ecology of Odontocetes

Author : Bernd Würsig
Publisher : Springer
ISBN 13 : 3030166635
Total Pages : 508 pages
Book Rating : 4.0/5 (31 download)

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Book Synopsis Ethology and Behavioral Ecology of Odontocetes by : Bernd Würsig

Download or read book Ethology and Behavioral Ecology of Odontocetes written by Bernd Würsig and published by Springer. This book was released on 2019-08-02 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book concentrates on the marine mammalian group of Odontocetes, the toothed whales, dolphins, and porpoises. In 23 chapters, a total of 40 authors describe general patterns of ethological concepts of odontocetes in their natural environments, with a strong bent towards behavioral ecology. Examples are given of particularly well-studied species and species groups for which enough data exist, especially from the past 15 years. The aim is to give a modern flavor of present knowledge of ethology and behavior of generally large-brained behaviorally flexible mammals that have evolved quite separately from social mammals on land. As well, the plight of populations and species due to humans is described in multiple chapters, with the goal that an understanding of behavior can help to solve or alleviate at least some human-made problems.

Dolphin Societies

Author : Karen Pryor
Publisher : Univ of California Press
ISBN 13 : 9780520216563
Total Pages : 410 pages
Book Rating : 4.2/5 (165 download)

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Book Synopsis Dolphin Societies by : Karen Pryor

Download or read book Dolphin Societies written by Karen Pryor and published by Univ of California Press. This book was released on 1991 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: A survey of current dolphin research.

Texas Aquatic Science

Author : Rudolph A. Rosen
Publisher : Texas A&M University Press
ISBN 13 : 1623492270
Total Pages : 218 pages
Book Rating : 4.6/5 (234 download)

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Book Synopsis Texas Aquatic Science by : Rudolph A. Rosen

Download or read book Texas Aquatic Science written by Rudolph A. Rosen and published by Texas A&M University Press. This book was released on 2014-11-19 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: This classroom resource provides clear, concise scientific information in an understandable and enjoyable way about water and aquatic life. Spanning the hydrologic cycle from rain to watersheds, aquifers to springs, rivers to estuaries, ample illustrations promote understanding of important concepts and clarify major ideas. Aquatic science is covered comprehensively, with relevant principles of chemistry, physics, geology, geography, ecology, and biology included throughout the text. Emphasizing water sustainability and conservation, the book tells us what we can do personally to conserve for the future and presents job and volunteer opportunities in the hope that some students will pursue careers in aquatic science. Texas Aquatic Science, originally developed as part of a multi-faceted education project for middle and high school students, can also be used at the college level for non-science majors, in the home-school environment, and by anyone who educates kids about nature and water. To learn more about The Meadows Center for Water and the Environment, sponsors of this book's series, please click here.

Whales, Seals, Fish and Man

Author : A. Schytte Blix
Publisher : Elsevier
ISBN 13 : 0080543790
Total Pages : 735 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Whales, Seals, Fish and Man by : A. Schytte Blix

Download or read book Whales, Seals, Fish and Man written by A. Schytte Blix and published by Elsevier. This book was released on 1995-10-06 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume outlines the major findings from the Norwegian research programme on whales and seals in Norwegian waters. A wide range of topics are covered, including physiological aspects, social organization, population dynamics, stock assessment and management. The book will be of great value to scientists and managers, as well as to members of the general public interested in environmental issues.

Odontocetes

Author : Boris M. Culik
Publisher : UN
ISBN 13 : 9783937429922
Total Pages : 0 pages
Book Rating : 4.4/5 (299 download)

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Book Synopsis Odontocetes by : Boris M. Culik

Download or read book Odontocetes written by Boris M. Culik and published by UN. This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Toothed whales occur in a wide range of marine and freshwater habitats, from the Arctic to the tropics. Some species live in large river systems such as the Amazon, Ganges, Indus and Yangtze. This encyclopedia on all 72 species of toothed whales includes the most recent scientific findings on the distribution, migration, behaviour and threats to this group of whales.

The Environmental Behaviour of Polonium

Author : International Atomic Energy Agency
Publisher :
ISBN 13 : 9789201121165
Total Pages : 255 pages
Book Rating : 4.1/5 (211 download)

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Book Synopsis The Environmental Behaviour of Polonium by : International Atomic Energy Agency

Download or read book The Environmental Behaviour of Polonium written by International Atomic Energy Agency and published by . This book was released on 2018-01-31 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polonium-210 is an alpha emitting radionuclide with no radioactive progeny and produces only very-low-intensity gamma rays at very low abundance. This means doses largely arise from internal exposure. In addition to the relatively high ingestion does coefficient of 210Po, radionuclide transfer in the environment results in high activity concentrations in certain foods. This publication focuses on radionuclide transfers in terrestrial, freshwater and marine environments, and provides information on key transfer processes, concepts and models--back cover.

The Hawaiian Spinner Dolphin

Author : Kenneth S. Norris
Publisher : Univ of California Press
ISBN 13 : 052091354X
Total Pages : 437 pages
Book Rating : 4.5/5 (29 download)

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Book Synopsis The Hawaiian Spinner Dolphin by : Kenneth S. Norris

Download or read book The Hawaiian Spinner Dolphin written by Kenneth S. Norris and published by Univ of California Press. This book was released on 1994-08-30 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty years in the making by a distinguished dolphin expert and his associates, The Hawaiian Spinner Dolphin is the first comprehensive scientific natural history of a dolphin species ever written. From their research camp at Kealakeakua Bay in Hawaii, these scientists followed a population of wild spinner dolphins by radiotracking their movements and, with the use of a windowed underwater vessel, observing the details of their underwater social life. The authors begin with a description of the spinner dolphin species, its morphology and systematics, and then examine the ocean environment, the organization of dolphin populations, and the way this school-based society of mammals uses shorelines for rest and instruction of the young. The dolphins' reproductive cycle, their vision, vocalization, hearing, breathing, and feeding, and the integration of the school are carefully analyzed. The authors conclude with a comprehensive evolutionary analysis of this marine cultural system, with its behavioral flexibility and high levels of cooperation. This absorbing book is the richest source available of new scientific insights about the lives of wild dophins and how their societies evolved at sea.

Distribution Ecology

Author : Marcelo Hernán Cassini
Publisher : Springer Science & Business Media
ISBN 13 : 1461464153
Total Pages : 221 pages
Book Rating : 4.4/5 (614 download)

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Book Synopsis Distribution Ecology by : Marcelo Hernán Cassini

Download or read book Distribution Ecology written by Marcelo Hernán Cassini and published by Springer Science & Business Media. This book was released on 2013-03-02 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together a set of approaches to the study of individual-species ecology based on the analysis of spatial variations of abundance. Distribution ecology assumes that ecological phenomena can be understood when analyzing the extrinsic (environmental) or intrinsic (physiological constraints, population mechanisms) that correlate with this spatial variation. Ecological processes depend on geographical scales, so their analysis requires following environmental heterogeneity. At small scales, the effects of biotic factors of ecosystems are strong, while at large scales, abiotic factors such as climate, govern ecological functioning. Responses of organisms also depend on scales: at small scales, adaptations dominate, i.e. the ability of organisms to respond adaptively using habitat decision rules that maximize their fitness; at large scales, limiting traits dominate, i.e., tolerance ranges to environmental conditions.

Essential Fish Habitat Mapping in the Mediterranean

Author : Vasilis D. Valavanis
Publisher : Springer Science & Business Media
ISBN 13 : 1402091419
Total Pages : 297 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Essential Fish Habitat Mapping in the Mediterranean by : Vasilis D. Valavanis

Download or read book Essential Fish Habitat Mapping in the Mediterranean written by Vasilis D. Valavanis and published by Springer Science & Business Media. This book was released on 2009-03-27 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proper designation of Essential Fish Habitat (EFH) is a highly important spatial measure in any management of fishery resources. EFH is defined as those waters and substrates necessary to fish for spawning, breeding, feeding, or growth to maturity, a definition that includes the physical, chemical and biological properties of marine areas and the associated sediment and biological assemblages that sustain fish populations throughout their full life cycle. This book presents latest advances in EFH mapping and modelling and introduces the environmental approach to EFH identification through the combined use of latest technologies and advanced techniques, such as Remote Sensing, Geographic Information Systems and Spatial Statistics. The contents of this book include overviews and comparisons of different approaches on species habitat modelling, methods to identify teleconnection patterns between large-scale meteo-oceanic phenomena and local environmental variation, and EFH maps for cephalopod, shrimp, hake, anchovy, sardine, and swordfish resources in the Mediterranean. The aims of this book are to provide accumulated knowledge on marine species essential habitat mapping and to be a source for further developments in the important topic of marine resource management.

Social Predation

Author : Guy Beauchamp
Publisher : Elsevier
ISBN 13 : 0124076548
Total Pages : 335 pages
Book Rating : 4.1/5 (24 download)

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Book Synopsis Social Predation by : Guy Beauchamp

Download or read book Social Predation written by Guy Beauchamp and published by Elsevier. This book was released on 2013-12-07 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: The classic literature on predation dealt almost exclusively with solitary predators and their prey. Going back to Lotka-Volterra and optimal foraging theory, the theory about predation, including predator-prey population dynamics, was developed for solitary species. Various consequences of sociality for predators have been considered only recently. Similarly, while it was long recognized that prey species can benefit from living in groups, research on the adaptive value of sociality for prey species mostly emerged in the 1970s. The main theme of this book is the various ways that predators and prey may benefit from living in groups. The first part focusses on predators and explores how group membership influences predation success rate, from searching to subduing prey. The second part focusses on how prey in groups can detect and escape predators. The final section explores group size and composition and how individuals respond over evolutionary times to the challenges posed by chasing or being chased by animals in groups. This book will help the reader understand current issues in social predation theory and provide a synthesis of the literature across a broad range of animal taxa. Includes the whole taxonomical range rather than limiting it to a select few Features in-depth analysis that allows a better understanding of many subtleties surrounding the issues related to social predation Presents both models and empirical results while covering the extensive predator and prey literature Contains extensive illustrations and separate boxes that cover more technical features, i.e., to present models and review results

Marine Mammals

Author : Randall W. Davis
Publisher : Springer Nature
ISBN 13 : 331998280X
Total Pages : 302 pages
Book Rating : 4.3/5 (199 download)

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Book Synopsis Marine Mammals by : Randall W. Davis

Download or read book Marine Mammals written by Randall W. Davis and published by Springer Nature. This book was released on 2019-11-14 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive book provides new insights into the morphological, metabolic, thermoregulatory, locomotory, diving, sensory, feeding, and sleep adaptations of Cetacea (whales and dolphins), Pinnipedia (seals, sea lions and walrus), Sirenia (manatees and dugongs) and sea otters for an aquatic life. Each chapter reviews the discoveries from previous studies and integrates recent research using new techniques and technology. Readers will gain an understanding of the remarkable adaptations that enable marine mammals to spend all or most of their lives at sea, often while hunting prey at depth.