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Books > Sport & Leisure > Natural history, country life & pets > Wild animals > Aquatic creatures
In November 2002, coastal and fisheries staff from Olympic National
Park conducted a four-day inventory of intertidal fishes at San
Juan Island National Historical Park. Beach seine sampling was
employed in all intertidal zone habitat types associated with the
coastal areas of the American and English Camp units. A total of 26
sites were sampled in both park units, with 11 sites sampled in the
protected bay habitats of English Camp and 15 in the more exposed
coastal habitats of American Camp. Intertidal habitat diversity was
relatively low, with most areas dominated by mixed-coarse gravel
and sand (American Camp) or mud/silt (English Camp) substrates. A
total of 14 species were documented including various baitfish
(smelt, herring, sandlance), surfperch, flatfish, sculpins, and
gunnels. This project is the first effort to inventory the
intertidal fishes of San Juan Island National Historical Park and
only represents the assemblage structure found within the limited
sampling period.
The leatherback sea turtle (Dermochelys coriacea; leatherback) is
the largest and most migratory of the world's turtles, with the
most extensive geographic range of any living reptile. This highly
specialized turtle is the only living member of the family
Dermochelyidae. It exhibits reduced external keratinous structures:
scales are temporary, disappearing within the first few months and
leaving the entire body covered by smooth black skin. Dorsal keels
streamline a tapered form. The species has a shallow genealogy and
strong population structure worldwide, supporting a natal homing
hypothesis. Gravid females arrive seasonally at preferred nesting
grounds in tropical and subtropical latitudes, with the largest
colonies concentrated in the southern Caribbean region and central
West Africa. Non-breeding adults and sub-adults journey into
temperate and subarctic zones seeking oceanic jellyfish and other
soft-bodied invertebrates. Long-distance movements are not random
in timing or location, with turtles potentially possessing an
innate awareness of profitable foraging opportunities. The basis
for high seas orientation and navigation is poorly understood.
Studies of metabolic rate demonstrate marked differences between
leatherbacks and other sea turtles: the "marathon" strategy of
leatherbacks is characterized by relatively lower sustained active
metabolic rates. Metabolic rates during terrestrial activities are
well-studied compared with metabolic rates associated with activity
at sea. The species faces two major thermoregulatory challenges:
maintaining a high core temperature in cold waters of high
latitudes and/or great depths, and avoiding overheating in some
waters and latitudes, especially while on land during nesting. The
primary means of physiological osmoregulation are the lachrymal
glands, which eliminate excess salt from the body. The leatherback
was re-classified in 2000 by the International Union for the
Conservation of Nature (IUCN) Red List of Threatened Species as
Critically Endangered. It remains vulnerable to a wide range of
threats, including bycatch, ingestion of and entanglement in marine
debris, take of turtles and eggs, and loss of nesting habitat to
coastal processes and beachfront development. There is no evidence
of significant current declines at the largest of the Western
Atlantic nesting grounds, but Eastern Atlantic populations face
serious threats and Pacific populations have been decimated.
Incidental mortality in fisheries, implicated in the collapse of
the Eastern Pacific population, is a largely unaddressed problem
worldwide. Although sea turtles were among the first marine species
to benefit from legal protection and concerted conservation effort
around the world, management of contemporary threats often falls
short of what is necessary to prevent further population declines
and ensure the species' survival throughout its range. Successes
include regional agreements that emphasize unified management
approaches, national legislation that protects large juveniles and
breeding-age adults, and community-based conservation efforts that
offer viable alternatives to unsustainable patterns of
exploitation. Future priorities should include the identification
of critical habitat and priority conservation areas, including
corridors that span multiple national jurisdictions and the high
seas, the creation of marine management regimes at ecologically
relevant scales and the forging of new governance patterns,
reducing or eliminating causal factors in population declines
(e.g., over-exploitation, bycatch), and improving management
capacity at all levels.
The Hudson is a mighty and magnificent river that holds a unique
place in world history. This book gives readers the tools they need
to understand the river and its variety of qualities that make up
this special waterway. The goal of this book is twofold. First and
foremost, it educates readers on the importance of the Hudson River
as a natural resource, key transportation artery, and chief
provider of food, oxygen, and water needed to sustain the local,
national, and global ecosystem. Second, this book mentions its
characteristics, tributaries, and how the river is an historic and
scenic treasure-a treasure that also economically benefits New York
and New Jersey by offering its residents and tourists many
attractions and recreational opportunities. Chapters include:
Hudson River: Overview of the Hudson River and Its Tributaries;
Aquatic Plants, Habitats, Hudson River Estuaries (tributaries
within the estuaries), Its Ecosystem, Fish and Wildlife; Hudson
Estuary Program, Its Ecosystem (including changes in it), Fish and
Other Wildlife (Con't)/River Pollution Problems & Solutions;
Photo Section; Hudson River Access/Transportation Links (Railroads,
Recreation and Commercial Vessels, Bridges, Tunnels, etc.); Hudson
River Historical Attractions/Recreational Activities and Sites;
Newly Completed & Future Hudson Riverfront Development Projects
and Hudson River Real Estate Market; Some Historical Highlights of
the Hudson River and Its Valley; and the Author's Summary.
Charles Robert Darwin, FRS (12 February 1809 - 19 April 1882) was
an English naturalist. He established that all species of life have
descended over time from common ancestors, and proposed the
scientific theory that this branching pattern of evolution resulted
from a process that he called natural selection. Darwin published
his theory with compelling evidence for evolution in his 1859 book
On the Origin of Species, overcoming scientific rejection of
earlier concepts of transmutation of species. By the 1870s the
scientific community and much of the general public had accepted
evolution as a fact. However, many favoured competing explanations
and it was not until the emergence of the modern evolutionary
synthesis from the 1930s to the 1950s that a broad consensus
developed in which natural selection was the basic mechanism of
evolution. In modified form, Darwin's scientific discovery is the
unifying theory of the life sciences, explaining thediversity of
life. -wikipedia
This is a new release of the original 1961 edition.
This volume reviews the experience of cooperation in five
international river basins, focusing on the perceptions of risks
and opportunities by decision makers in countries responding to a
specific prospect of cooperation. For each basin, the analysis
centered on "tipping points," or periods in time when policymakers
in the countries involved were faced with a critical decision
concerning water cooperation. This study was inspired, in part, by
the intensified involvement of the World Bank and development
partners in shared international waters, resulting in a growing
interest to better understand the political economy surrounding
regional cooperation deals over water. While the associated
economic benefits and costs of cooperation are generally well
analyzed, the perceptions of decision makers regarding political
risks and opportunities have been much less explored. Responding to
this knowledge gap, this study looked at the political dimension of
cooperation over international waters, beginning with perceived
risks. Five categories of perceived risk were analyzed: 1) Capacity
and Knowledge; 2) Accountability and Voice; 3) Sovereignty and
Autonomy; 4) Equity and Access; and 5) Stability and Support. All
five categories of risk were found to exert a significant influence
on cooperation decisions, indicating that perceived risks were a
core consideration for decision makers in countries. Furthermore,
cooperation was more likely when risks were reduced, or
opportunities created for political gains. This has important
implications for development partners' engagement in shared
international waters. Partners are advised to conduct risk
assessments in consultation with countries involved, and devise
plans for reducing perceived risks. Suggested measures for partner
action are also included. In addition to the discussions of risk
and enhancing the potential for cooperation, this volume offers
some important lessons on supporting cooperation. First,
cooperation can take several years of planning and confidence
building, often before negotiations even begin. Thus, a long-term
time commitment by partners is likely required. Finally, deals are
dynamic. Once a deal is reached, the situation does not become
static: deals can be fragile and fall apart or evolve and grow into
stronger and more sustainable arrangements. Accordingly, periodic
assessments are needed to reflect changing realities and as inputs
for a revised strategy.|It is often said that children have always
been part of the workforce. With the onset of the industrial
revolution in the nineteenth century, children were exploited under
miserable conditions in factories, and a movement against child
labor began. A worldwide campaign increased awareness and alerted
international organizations and governments to the idea that child
labor would best be replaced by child education. The current
objectives of such a campaign seem simple and laudable but the
issues involved are complex and questions must be answered: What
actually is child labor, and what determines childhood? How many
child laborers are there in the world? Is child labor restricted to
developing countries or is it frequently used in order to
stigmatize the non-Western world? Is regulation of labor conditions
the solution or should governments and civil society opt for a
radical ban? Is there a role for corporate social responsibility?
Kristoffel Lieten is professor of child labour studies at the
International Institute of Social Studies at the University of
Amsterdam.
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