Migration of green turtles Chelonia mydas from Tortuguero, Costa Rica

Troëng, Sebastian; Evans, Daniel R.; Harrison, Emma; Lagueux, Cynthia J.

doi:10.1007/s00227-005-0076-4

Cited by 102 publications

(84 citation statements)

References 36 publications

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“…Satellite tracking has been utilized to document extended post-nesting movements, such as those of leatherback turtles Dermochelys coriacea spanning the Atlantic (James et al 2005) and Pacific Oceans (Benson et al 2007), as well as more localized internesting movements (e.g. olive ridleys: Plotkin 1998; loggerheads: Stoneburner 1982, Godley et al 2003; green turtles: Hays et al 1999, Troëng et al 2005b; and hawksbill turtles Eretmochelys imbricata: Troëng et al 2005a, Whiting et al 2006.…”

Section: Discussionmentioning

confidence: 99%

Movements of Kemps ridley sea turtles nesting on the upper Texas coast: implications for management

Seney

Landry²

2008

Endang. Species. Res.

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Increased nesting by the critically endangered Kemp's ridley sea turtle Lepidochelys kempii at Rancho Nuevo, Mexico has been complemented by commencement and growth of nesting in Texas, USA. Six female Kemp's ridleys were fitted with satellite transmitters after nesting on the upper Texas coast during 2005 and 2006 and subsequently tracked for 20 to 153 d. Two were confirmed nesting a second time on Galveston Island, whereas satellite tracks of these and 2 other females suggested that each nested a total of 3 times on the upper Texas coast within a season. Five of the females showed fidelity to nearshore waters off Galveston Island during their respective nesting seasons, and all 4 ridleys tracked after the nesting season established foraging areas on the continental shelf of Louisiana. One female stranded dead on Galveston Island 20 d after transmitter deployment. Fidelity of these nesters to the upper Texas coast, along with apparent increases in nesting activity in the region, warrant establishment of sea turtle management schemes comparable to those utilized in south Texas. Potential threats posed by urbanization, tourism, and in-water activities along the upper Texas coast should be addressed by federal, state, and local authorities, whereas increased nesting may also present opportunities for educational outreach and responsible ecotourism.

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Section: Discussionmentioning

confidence: 99%

Movements of Kemps ridley sea turtles nesting on the upper Texas coast: implications for management

Seney

Landry²

2008

Endang. Species. Res.

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“…Location of the nesting area in northeastern Brazil consecutive days (Zbinden et al 2008). Foraging areas were identified as those areas where turtles showed restricted movements (multidirectional and backtracked over previous tracks) following postnesting migrations, which continued until the transmitters stopped sending information or until turtles engaged new return migrations (Troeng et al 2005). To define important habitats for each turtle, we calculated fixed kernel home ranges using Hawth's analysis tools for ArcGIS (Beyer 2004).…”

Section: Methodsmentioning

confidence: 99%

Satellite-tracking of female loggerhead turtles highlights fidelity behavior in northeastern Brazil

Marcovaldi¹,

Lopez²,

Soares³

et al. 2010

Endang. Species. Res.

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We studied inter-and postnesting movements in the major loggerhead Caretta caretta nesting population in Brazil. Ten breeding females were satellite-tracked from nesting grounds in the state of Bahia, northeastern Brazil, for up to 1284 d. Eight females stayed in the nesting area after deployment, showing fidelity between internesting home ranges and nesting locations, even at a local scale. During postnesting movements, all of the turtles migrated to the northern coast of Brazil to individual foraging areas on the continental shelf. Distances between nesting and foraging areas reached up to 2400 km, and migration lasted from 28 to 47 d. Five females were tracked during subsequent breeding migrations to the nesting area at different remigration intervals of 2 or 3 yr. Females were also tracked during a second postnesting migration back to foraging areas, and these showed strong fidelity to foraging grounds. Movements to and from foraging grounds occurred along the shelf, clearly delineating a migratory corridor. The northern coast of Brazil, specifically the coast of the state of Ceará, is an important foraging ground for loggerheads nesting along the northern coast of Bahia.

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“…Post-nesting migrations were considered complete when movement no longer appeared to be directed for at least 3 consecutive days (Zbinden et al 2008). Foraging grounds were identified as those areas where turtles showed restricted movements (multidirectional and backtracked over previous tracks) following post-nesting migrations, which continued until transmissions ceased or turtles engaged in new return migrations (Troëng et al 2005). These areas were defined solely based on turtle movements as it was not possible to verify foraging behavior.…”

Section: Methodsmentioning

confidence: 99%

Satellite-tracking reveals multiple foraging strategies and threats for olive ridley turtles in Brazil

Silva¹,

Santos²,

Castilhos³

et al. 2011

Mar. Ecol. Prog. Ser.

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The state of Sergipe in northeastern Brazil is the largest nesting area for olive ridley turtles along this nation's coast, and constitutes a major rookery in the western Atlantic as well. Conservation efforts with a focus on nesting activities have been implemented there since 1982, but little is known about other aspects of the life cycle, specifically post-nesting movements of females and the locations of foraging grounds. To address this issue, satellite transmitters were deployed on 10 females that nested between February and April 2006. The turtles were monitored for an average of 113 d (range: 14 to 297 d), and an average movement of 1669 km (range: 407 to 4265 km) was recorded. Of the 10 turtles monitored, 6 moved along the Brazilian continental shelf to neritic foraging areas. Five of these turtles utilized foraging areas along the northern and northeastern coasts of Brazil, while one foraged along the southeastern coastline. Two females were tracked to equatorial oceanic waters, with one first moving to an inshore foraging site where she remained for 34 d before migrating to oceanic waters off the Brazilian coast. Signal transmission of 3 of the 10 turtles tracked ceased during their post-nesting migrations, preventing identification of their feeding areas. Olive ridley turtles nesting on the coast of Sergipe displayed a range of post-nesting movements including to coastal sites along the continental shelf as well as offshore oceanic areas. Inter-nesting habitats, migration routes and foraging grounds showed great overlap with a variety of coastal fisheries, as well as with longline fishing in oceanic waters, a key consideration for developing conservation strategies for this species in the western Atlantic.

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Migration of green turtles Chelonia mydas from Tortuguero, Costa Rica

Cited by 102 publications

References 36 publications

Movements of Kemps ridley sea turtles nesting on the upper Texas coast: implications for management

Movements of Kemps ridley sea turtles nesting on the upper Texas coast: implications for management

Satellite-tracking of female loggerhead turtles highlights fidelity behavior in northeastern Brazil

Satellite-tracking reveals multiple foraging strategies and threats for olive ridley turtles in Brazil

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Migration of green turtles Chelonia mydas from Tortuguero, Costa Rica

Cited by 102 publications

References 36 publications

Movements of Kemps ridley sea turtles nesting on the upper Texas coast: implications for management

Movements of Kemps ridley sea turtles nesting on the upper Texas coast: implications for management

Satellite-tracking of female loggerhead turtles highlights fidelity behavior in northeastern Brazil

Satellite-tracking reveals multiple foraging strategies and threats for olive ridley turtles in Brazil

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Movements of Kemps ridley sea turtles nesting on the upper Texas coast: implications for management

Movements of Kemps ridley sea turtles nesting on the upper Texas coast: implications for management