Natural and anthropogenic factors affecting the nest-site selection of Loggerhead Turtles,<i>Caretta caretta</i>, on Dalaman-Sarıgerme beach in South-west Turkey

Kaska, Yakup; Başkale, Eyup; Urhan, Raşit; Katılmış, Yusuf; Gidiş, Müge; Sari, Fikret; Sözbilen, Doğan; Canbolat, Ali Fuat; Yılmaz, Feride Taşkın; Barlas, Murat; Özdemir, Nedim; Özkul, Mehmet

doi:10.1080/09397140.2010.10638411

Cited by 26 publications

(18 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 1994, the private land behind the main nesting beach in Zakynthos was acquired by WWF-Greece, creating the core area for the future National Marine Park of Zakynthos established in 1999 thanks to severe pressure from the EU, the Bern Convention and international organisations (Dimo poulos 2001). In southern Kyparissia Bay, a massive nestprotection programme started in 1992 and reduced the predation rate by foxes from about 50 to 13%, which is a possible cause of the considerable increase in the number of nests and in the proportion of neophyte turtles observed in the last few years (Mar- & Kaska 2010). Of these, only 3 (Dalyan, Patara and Akyatan) are undeveloped, whilst the other 18 are either fully developed or under development.…”

Section: Conservation Measures In Terrestrial Habitatsmentioning

confidence: 99%

Mediterranean sea turtles: current knowledge and priorities for conservation and research

Casale¹,

Broderick²,

Camiñas³

et al. 2018

Endang. Species. Res.

187

227

View full text Add to dashboard Cite

The available information regarding the 2 sea turtle species breeding in the Mediterranean (loggerhead turtle Caretta caretta and green turtle Chelonia mydas) is reviewed, including biometrics and morphology, identification of breeding and foraging areas, ecology and behaviour, abundance and trends, population structure and dynamics, anthropogenic threats and conservation measures. Although a large body of knowledge has been generated, research efforts have been inconsistently allocated across geographic areas, species and topics. Significant gaps still exist, ranging from the most fundamental aspects, such as the distribution of major nesting sites and the total number of clutches laid annually in the region, to more specific topics like age at maturity, survival rates and behavioural ecology, especially for certain areas (e.g. southeastern Mediterranean). These gaps are particularly marked for the green turtle. The recent positive trends of nest counts at some nesting sites may be the result of the cessation of past exploitation and decades of conservation measures on land, both in the form of national regulations and of continued active protection of clutches. Therefore, the current status should be considered as dependent on such ongoing conservation efforts. Mitigation of incidental catch in fisheries, the main anthropogenic threat at sea, is still in its infancy. From the analysis of the present status a comprehensive list of re search and conservation priorities is proposed.

show abstract

Section: Conservation Measures In Terrestrial Habitatsmentioning

confidence: 99%

Mediterranean sea turtles: current knowledge and priorities for conservation and research

Casale¹,

Broderick²,

Camiñas³

et al. 2018

Endang. Species. Res.

187

227

View full text Add to dashboard Cite

show abstract

“…Most of these studies are on beach sites along the coast of Florida (Salmon et al, 1995b;Witherington and Martin, 2000;Salmon, 2003;Weishampel et al, 2006;Aubrecht et al, 2010a). Sea turtle researchers along the coast of the Mediterranean Sea seldom investigate this relationship (Kaska et al, 2003;Aureggi et al, 2005) and very few studies have explored this issue at a regional or broad spatial scale. Overall, the relationship between night lights and its effect on sea turtle nesting is poorly understood.…”

Section: Sea Turtlesthreats and Factors Affecting Nesting Patternsmentioning

confidence: 99%

Can satellite-based night lights be used for conservation? The case of nesting sea turtles in the Mediterranean

Mazor

Levin

Possingham

et al. 2013

Biological Conservation

View full text Add to dashboard Cite

Artificial night lights pose a major threat to multiple species. However, this threat is often disregarded in conservation management and action because it is difficult to quantify its effect. Increasing availability of high spatial-resolution satellite images may enable us to better incorporate this threat into future work, particularly in highly modified ecosystems such as the coastal zone. In this study we examine the potential of satellite night light imagery to predict the distribution of the endangered loggerhead (Caretta caretta) and green (Chelonia mydas) sea turtle nests in the eastern Mediterranean coastline. Using remote sensing tools and high resolution data derived from the SAC-C satellite and the International Space Station, we examined the relationship between the long term spatial patterns of sea turtle nests and the intensity of night lights along Israel's entire Mediterranean coastline. We found that sea turtles nests are negatively related to night light intensity and are concentrated in darker sections along the coast. Our resulting GLMs showed that night lights were a significant factor for explaining the distribution of sea turtle nests. Other significant variables included: cliff presence, human population density and infrastructure. This study is one of the first to show that night lights estimated with satellite-based imagery can be used to help explain sea turtle nesting activity at a detailed resolution over large areas. This approach can facilitate the management of species affected by night lights, and will be particularly useful in areas that are inaccessible or where broad-scale prioritization of conservation action is required.

show abstract

“…Beaches in our study area were, however, less urbanized than those examined in other studies that report negative impacts of coastal development on turtle nesting (Weishampel et al, 2003; Kaska et al, 2010; Roe, Clune & Paladino, 2013). Previous studies examining this aspect have typically been conducted along nesting beaches backed by high-density beachfront infrastructure (Kaska et al, 2010; Roe, Clune & Paladino, 2013). By contrast, a distinct buffer of coastal vegetation (100–200 m wide) borders many beaches in our study area.…”

Section: Discussionmentioning

confidence: 53%

Marine turtles are not fussy nesters: a novel test of small-scale nest site selection using structure from motion beach terrain information

Kelly

Leon

Gilby

et al. 2017

PeerJ

View full text Add to dashboard Cite

BackgroundNest selection is widely regarded as a key process determining the fitness of individuals and viability of animal populations. For marine turtles that nest on beaches, this is particularly pivotal as the nesting environment can significantly control reproductive success.The aim of this study was to identify the environmental attributes of beaches (i.e., morphology, vegetation, urbanisation) that may be associated with successful oviposition in green and loggerhead turtle nests.MethodsWe quantified the proximity of turtle nests (and surrounding beach locations) to urban areas, measured their exposure to artificial light, and used ultra-high resolution (cm-scale) digital surface models derived from Structure-from-Motion (SfM) algorithms, to characterise geomorphic and vegetation features of beaches on the Sunshine Coast, eastern Australia.ResultsAt small spatial scales (i.e., <100 m), we found no evidence that turtles selected nest sites based on a particular suite of environmental attributes (i.e., the attributes of nest sites were not consistently different from those of surrounding beach locations). Nest sites were, however, typically characterised by occurring close to vegetation, on parts of the shore where the beach- and dune-face was concave and not highly rugged, and in areas with moderate exposure to artificial light.ConclusionThis study used a novel empirical approach to identify the attributes of turtle nest sites from a broader ‘envelope’ of environmental nest traits, and is the first step towards optimizing conservation actions to mitigate, at the local scale, present and emerging human impacts on turtle nesting beaches.

show abstract

Natural and anthropogenic factors affecting the nest-site selection of Loggerhead Turtles,Caretta caretta, on Dalaman-Sarıgerme beach in South-west Turkey

Cited by 26 publications

References 22 publications

Mediterranean sea turtles: current knowledge and priorities for conservation and research

Mediterranean sea turtles: current knowledge and priorities for conservation and research

Can satellite-based night lights be used for conservation? The case of nesting sea turtles in the Mediterranean

Marine turtles are not fussy nesters: a novel test of small-scale nest site selection using structure from motion beach terrain information

Contact Info

Product

Resources

About