121,422 research outputs found
Strategic planning for long-term financing of Pacific leatherback conservation and recovery
No full text45 experts on sea turtles, fisheries, conservation and finance from 10 countries convened at the Bellagio Sea Turtle Conservation Initiative workshop in Terengganu, Malaysia, to focus on methods to save the imperiled Pacific leatherback from extinction. The group developed a strategic plan to guide the prioritization and long term financing of Pacific leatherback turtle conservation and recovery objectives.Nature conservation, Resource management, Conferences, Policies, Sea turtle, Nesting, Nests, ISEW, Pacific, Dermochelys coriacea
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Charles Longcope Jr. Turtle Creek Chorale Video Archive
No full textVideo footage from the Turtle Creek Chorale Collection (The Dallas Way). Footage of the chorale performing a Christmas concert in the chapel at the St. Paul Hospital in Dallas, Texas. The concert includes a hand bell performance by the chorale
Charles Longcope Jr. Turtle Creek Chorale Video Archive
No full textVideo footage from the Turtle Creek Chorale Collection (The Dallas Way). Footage of the chorale performing a Christmas concert in the chapel at the St. Paul Hospital in Dallas, Texas. The concert includes a hand bell performance by the chorale
Change of perspective: using aerial surveys to identify human-turtle interactions in the Ningaloo Marine Park
No full textShore-based turtle tourism is emerging as a popular activity for independent travellers during the summer months in the Ningaloo Marine Park, yet little is known about the spatial extent of human-turtle interactions and their impact on nesting marine turtle species in the area. Aerial survey techniques in conjunction with Geographic Information Systems (GIS) can provide useful tools for identifying potential 'interaction hotspots' where management of human-turtle interactions is required. This paper explores the application of aerial surveys that quantify both tourist activity and turtle nesting activity along the Ningaloo Marine Park coast in Western Australia
Engaging students in science: Turtle nestwatch
No full textInvolving students in authentic science work is one way to enhance their interest in science. This paper reports a project in which Year 4-7 students actively participated in a study that involved the provision of a suitable nesting site for local turtles. The students collected data on turtle nests at the site and evidence of turtle hatchlings at it and in the wider wetlands locality. Thirty-one turtle nests were located at the site during the project but all were predated. Teaching and learning outcomes are discussed
TURTLE: Four Weddings and a Tutorial
No full textThe paper discusses an educational case study of protocol modelling in TURTLE, a real-time UML profile supported by the open source toolkit TTool. The method associated with TURTLE is step by step illustrated with the connection set up and handover procedures defined for the Future Air navigation Systems. The paper covers the following methodological stages: requirement modeling, use-case driven and scenario based analysis, object-oriented design and rapid prototyping in Java. Emphasis is laid on the formal verification of analysis and design diagrams
Observations of non-compliance behaviour by tourists to a voluntary code of conduct: A pilot study of turtle tourism in the Exmouth region, Western Australia
No full textThis paper reports on the results of a pilot study of observations of non-compliance behaviour by tourists to a voluntary code of conduct based on marine turtles attempting to nest in the Ningaloo Marine Park, Western Australia. The study used focal-animal sampling to record the response of marine turtles to non-compliance behaviour of tourist groups. Results of observations indicated that 77% of tourist groups breached the code of conduct, with 51% of these breaches resulting in a disturbance to marine turtles attempting to nest. The key aspects of the code of conduct that were breached included: shining light on the turtle; being closer than three metres from a turtle; and not staying behind the turtle at all times. The greatest disturbance to marine turtles was from tourists groups shining their torches on the turtles. This work demonstrates the need for further research into disturbance of turtles by tourists and the effectiveness of voluntary codes of conduct
Social values of biodiversity conservation for the endangered loggerhead turtle and monk seal
No full textThe Mediterranean monk seal (Monachus monachus) and the loggerhead turtle (Caretta caretta) are two species on the priority list for conservation in Greece due to their dwindling populations worldwide. Hence the issue of estimating willingness to pay for their conservation is germane to any protection initiative. Zakynthos Island in Greece has created a marine park for the conservation of such species. We report the results of a survey of visitors and residents of this island who were asked about making one-time donations in the form of either a tax for residents or a plane landing fee for tourists. We find that all people were willing to pay to protect these species; however, residents were willing to pay more than tourists. We then tested whether there was a sequence or ordering effect if the seal questions came before the turtles as well as if the turtle questions came before the seals. Such effect was found when turtle questions were presented first, but not when seal questions were presented first. Due to the extensive interest, it is recommended that an increase in the airplane landing fee to Zakynthos could be used to contribute towards funds for loggerhead turtle and monk seal protection
Sea turtles and the environmental management of industrial activities in North West Western Australia
No full textThe nesting demographics of sea turtles using beaches within the Barrow, Lowendal, Montebello (B-L-M) island complex on the North West Shelf of Western Australia were examined in the context of their spatial and temporal distribution and potential for exposure to industrially based artificial light sources. The distribution of overnight turtle tracks throughout the island complex confirmed high density nesting of Chelonia mydas (green turtles) on deep, sandy and high energy beaches and Natator depressus (flatback turtles) on deep, sandy and low energy beaches, while Eretmochelys imbricata (hawksbill turtle) tracks were most visible on shallow, sandy beaches adjacent to near shore coral reef habitat. The three species exhibited a summer nesting peak. Hawksbill turtles commenced nesting in September and continued through to January, green turtles commenced in November and decreased in March. Flatback turtles displayed the most constrained nesting season reported to date in Australia with 86% of the animals visits recorded in December and January only. Nesting population sizes estimated for the three species suggest that on a national scale the B-L-M complex is a moderately large green turtle and a large flatback rookery site. The hawksbill rookery is large on an international scale. While none of the green turtle nesting beaches fell within a 1.5 km radius of industrially based artificial light sources an estimated 42% of nesting flatback turtles and 12% of nesting hawksbill turtles were potentially exposed to these light sources.
Testing of green turtle and hawksbill hatchling response to different wavelengths of light indicate that hatchlings from the B-L-M region respond to low wavelength much like hatchlings tested in North America (Witherington 1992a). Flatback hatchlings displayed a similar preference for low wavelength light however their responses to discrete light wavelengths between 400 nm and 700 nm suggest that this species may not discriminate well between wavelengths that lie between 450 nm and 550 nm. This response may be related to the rapid attenuation of visible light that occurs in the turbid near shore habitats favoured by this species.
Field based arena studies carried out to investigate hatchling behaviour on nesting beaches with light types commonly used in industrial settings found green turtle and flatback hatchlings are significantly attracted to these lights compared to controls. Lights that emit strongly in the low wavelength range (i.e. metal halide and fluorescent) caused hatchling misorientation at lower intensities than the test light that emitted relatively poorly in this range (high pressure sodium vapour). Hawksbill hatchlings tested in situ under the influence of actual oil and gas onshore and offshore facility based lighting were disrupted from the most direct line to the ocean by these light emissions. Emergence fan mapping methods that measure hatchling orientation on nesting beaches were refined and are proposed as an alternative monitoring tool for use on beaches that are logistically difficult to access for large scale experimental orientation studies. The hatchling behaviour was clearly complicated by beach topography and moon phase.
Satellite tracking of post nesting female green and hawksbill turtles from North West Shelf rookeries has identified the Western Australian location of migratory corridors and foraging grounds for these species while Scott Reef turtles migrate from their south Timor Sea rookery to Northern Territory waters. Green turtle nesting on Barrow Island and Sandy Island (Scott Reef) forage at feeding grounds 200 - 1000 km from their nesting beaches. Hawksbill turtles nesting at Varanus Island and Rosemary Islands forage at locations 50 - 450 km from their nesting beaches. While all of the nesting beaches within the B-L-M island complex are protected under the Barrow-Montebello Marine Conservation Reserves, the only foraging ground similarly protected is the Northern Territory foraging ground used by Scott Reef green turtles. None of the foraging grounds used by North West Shelf green or hawksbill turtles is currently protected by conservation reserves
A new stem turtle from the Middle Jurassic of the Isle of Skye, Scotland, and a reassessment of basal turtle relationships
No full textA recent phylogenetic analysis of turtle interrelationships suggests that the Middle Jurassic
was a crucial time period for understanding the evolution of crown-group turtles. However, turtle
material of this age is scarce worldwide. Here, a new stem turtle, Eileanchelys waldmani, from the
Middle Jurassic (Bathonian) of the Isle of Skye, Scotland, is described and compared to other
basal species. With cranial and postcranial remains of several individuals, this is the most
comprehensive Middle Jurassic turtle material known to date. Eileanchelys waldmani documents an
intermediate stage in the evolution of early turtles between the Early Jurassic Kayentachelys aprix
and the crown-group. Whereas most stem turtles are interpreted as terrestrial forms, taphonomic
evidence suggests that E. waldmani may have been aquatic (freshwater), indicating that basal turtles
were ecologically more diverse than previously thought.
This new material provides the basis for a reassessment of other Middle Jurassic turtle
remains from the UK, especially revisions of material from Kirtlington and Stonesfield
(Oxfordshire). The material from Kirtlington is attributed to Paracryptodira and represents the
earliest occurrence of this group. The name 'Protochelys blakii', which had been proposed for the
Stonesfield remains, is considered to be a nomen dubium as this material lacks diagnostic features.
However, this material is remarkable as it consists of fossilised epidermal scales from the carapace.
A new phylogeny is proposed, resulting from a cladistic analysis of a revised and updated
version of a previously published data set. Nineteen new species are included in order to achieve a
more thorough representation of basal turtle taxa. Heckerochelys romani and Condorchelys antiqua are
found to be more basal than Eileanchelys waldmani. Chengyuchelyids (Middle Jurassic of China)
may be stem turtles more basal than Kallokibotion bajazidi. Naomichelys speciosa is closely related to
meiolaniids and Mongolochelys efremovi, while Siamochelys peninsularis is nested within
xinjiangchelyids
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