scholarly journals HABITAT SUITABILITY AND ZONING ANALYSIS FOR GREEN TURTLE Chelonia mydas IN THE MARINE CONSERVATION AREAS OF PANGUMBAHAN TURTLE PARK, SUKABUMI

2017 ◽  
Vol 8 (2) ◽  
pp. 539-552
Author(s):  
Yusuf Arief Afandy ◽  
Fredinan Yulianda ◽  
Syamsul Bahri Agus ◽  
Lucy Peter Liew
Keyword(s):  
Habitat Suitability ◽  
Green Turtle ◽  
Secondary Data ◽  
Chelonia Mydas ◽  
Marine Conservation ◽  
Suitability Analysis ◽  
Conservation Areas ◽  
Conservation Area ◽  
Green Turtles ◽  
Sand Temperature

This study reviews the suitability of habitat for the green turtle in the Pangumbahan Turtle Park. The purpose of this study is to evaluate the existing zoning system and to provide recommendations of alternative zoning approach based on ecological suitability turtle habitat. Observations and fieldwork were undertaken throughout the coastal area of Pangumbahan from January to June 2015 by collecting data which include nesting site for turtles, sand temperature and moisture content, width of the beach, surface slope of the beach, vegetation cover, seagrass and secondary data. Methods of data analysis consists of suitability analysis with the spatial approach using Geographic Information System. The results of the analysis of overlay method were classified into three classes of suitability, which include very suitable covering 6,91 hectares, suitable covering 14,60 hectares and less suitable covering 37,21 hectares. The current existing zones needs to be revised using the recommended zoning system. As an implementation of the findings from this study as well as to effectively manage the conservation area based on the green turtle ecology, it is highly recommended to do a zoning system which is based on the principal of the green turtles habitat suitability to ensure the sustainability of the green turtle within the conservation area. This will ensure the zoning system suits the green turtles’ characteristics hence enabling each of the zones to effectively functioning.

scholarly journals HABITAT SUITABILITY AND ZONING ANALYSIS FOR GREEN TURTLE Chelonia mydas IN THE MARINE CONSERVATION AREAS OF PANGUMBAHAN TURTLE PARK, SUKABUMI

2017 ◽  
Vol 8 (2) ◽  
pp. 539
Author(s):  
Yusuf Arief Afandy ◽  
Fredinan Yulianda ◽  
Syamsul Bahri Agus ◽  
Lucy Peter Liew
Keyword(s):  
Habitat Suitability ◽  
Green Turtle ◽  
Secondary Data ◽  
Chelonia Mydas ◽  
Marine Conservation ◽  
Suitability Analysis ◽  
Conservation Areas ◽  
Conservation Area ◽  
Green Turtles ◽  
Sand Temperature

<p>This study reviews the suitability of habitat for the green turtle in the Pangumbahan Turtle Park. The purpose of this study is to evaluate the existing zoning system and to provide recommendations of alternative zoning approach based on ecological suitability turtle habitat. Observations and fieldwork were undertaken throughout the coastal area of Pangumbahan from January to June 2015 by collecting data which include nesting site for turtles, sand temperature and moisture content, width of the beach, surface slope of the beach, vegetation cover, seagrass and secondary data. Methods of data analysis consists of suitability analysis with the spatial approach using Geographic Information System. The results of the analysis of overlay method were classified into three classes of suitability, which include very suitable covering 6,91 hectares, suitable covering 14,60 hectares and less suitable covering 37,21 hectares. The current existing zones needs to be revised using the recommended zoning system. As an implementation of the findings from this study as well as to effectively manage the conservation area based on the green turtle ecology, it is highly recommended to do a zoning system which is based on the principal of the green turtles habitat suitability to ensure the sustainability of the green turtle within the conservation area. This will ensure the zoning system suits the green turtles’ characteristics hence enabling each of the zones to effectively functioning.</p>

scholarly journals Biophysical Characteristics of Nesting Habitat of Green Turtle Chelonia mydas In the Coastal Zone of Kasiak, Bindalang and Karabak Ketek Island Of West Sumatra Indonesia

2019 ◽  
Vol 3 (2) ◽  
pp. 44
Author(s):  
Harfiandri Damanhuri ◽  
Dahelmi Dahelmi ◽  
Hafrijal Syandri ◽  
Dietriech G. Bengen
Keyword(s):  
Green Turtle ◽  
Chelonia Mydas ◽  
Sandy Beaches ◽  
Marine Conservation ◽  
Survey Method ◽  
Nesting Habitat ◽  
Chi Square ◽  
Conservation Area ◽  
Green Turtles ◽  
West Sumatra

The research was conducted on three small islands of marine conservation area of West Sumatra, namely Kasiak Island, Bindalang Island and Karabak Ketek Island from January to December 2016. This research  aimed to study the variation of biophysical character of nesting habitat of green turtle (Chelonia mydas L, 1758) by survey method, measurement, observation and analysis. All data were analyzed using Main Component Analysis (PCA), Kriskal Wallis Test Analysis. Based on PCA analysis, the contribution on main character is 43.28%. These results are supported by biophysical conditions of spawning habitats for green turtles is on Karabak Ketek Island as an ideal  island of spawning sites favored by green turtles, when compared to the location of Bindalang Island and Kasiak Island habitats.Result of Kruscal Wallis analysis of Karabak Island rank; 11.90, with a chi-square value; 10.47, asymp sig value 0.005 (5% -10%). This value shows the difference between the biophysical character of the spawning habitat on the character of the coastal slope parameter (KP) is 9.60 °.This is also the ideal slope value for the sandy beach habitat (PSe) and fine sandy beaches (PHA) as the main spawning location for green turtles in West Sumatra

scholarly journals Deteksi Cemaran Mikroorganisme pada Kawasan Konservasi Penyu di Pangumbahan Sukabumi

2018 ◽  
Vol 4 (1) ◽  
pp. 28
Author(s):  
Dewi Elfidasari ◽  
Toufan Gifari ◽  
Irawan Sugoro
Keyword(s):  
Green Turtle ◽  
Chelonia Mydas ◽  
Coliform Bacteria ◽  
Spawning Habitat ◽  
Molecular Method ◽  
Conservation Area ◽  
E Coli ◽  
Green Turtles ◽  
Turtle Conservation ◽  
Mold And Yeast

<p><em>Abstrak</em> - <strong>Penyu hijau (<em>Chelonia mydas</em>) merupakan reptil ordo Testudines, famili Cheloniidae yang masuk dalam kategori terancam punah CITES Appendiks I. Populasi penyu hijau semakin menurun disebabkan berbagai macam faktor. Diduga mikroorganisme juga berperan dalam penurunan hasil penetasan. Oleh karena itu perlu dilakukan deteksi cemaran mikroorganisme di kawasan konservasi penyu pangumbahan. Sampel mikroorganisme diambil dari habitat peneluran hingga pra dan pasca penetesan. Kemudian mikroorganisme diidentifikasi menggunakan metode molekuler dan <em>sequencing</em>. Hasil identifikasi menunjukkan mikroorganisme pencemar murni Gram negatif yang bersifat patogen. Golongan bakteri koliform yang terdeteksi adalah <em>E.coli</em>, <em>Salmonella </em>dan <em>Shigella</em>, sedangkan<em> </em>jamur didominasi oleh kapang dan <em>yeast</em>. </strong></p><p><strong> </strong></p><p><strong><em>Kata Kunci</em></strong><em>: penyu hijau, </em><em>Chelonia mydas</em><em>, cemaran mikroorganisme, konservasi penyu Pangumbahan</em><em>.</em></p><p><em> </em></p><p><em>Abstract</em> - <strong>Green turtle (Chelonia mydas) is a reptile of Testudines, Cheloniidae family belonging to the endangered category of CITES Appendix I. The population of green turtles is declining due to various factors. Suspected microorganisms also play a role in decreasing hatchery results. Therefore it is necessary to detect microorganisms in the conservation area of turtle pangumbahan. Microorganism samples were taken from spawning habitat up to pre and post penetration. Then the microorganisms were identified using molecular method and sequencing. The identification results show that Gram negative pure microorganisms are pathogenic. Groups of coliform bacteria that are detected are E. coli, Salmonella and Shigella, while mushrooms are dominated by mold and yeast.</strong></p><p> </p><p><strong><em>Keywords</em></strong><em>: Green Turtle, </em><em>Chelonia mydas</em><em>, microorganism pollution, Pangambahan Turtle Conservation</em>.</p>

scholarly journals Dietary analysis of two sympatric marine turtle species in the eastern Mediterranean

2021 ◽  
Vol 168 (6) ◽  
Author(s):  
Josie L. Palmer ◽  
Damla Beton ◽  
Burak A. Çiçek ◽  
Sophie Davey ◽  
Emily M. Duncan ◽  
...  
Keyword(s):  
Green Turtle ◽  
Eastern Mediterranean ◽  
Chelonia Mydas ◽  
Marine Turtle ◽  
Dietary Analysis ◽  
Low Frequencies ◽  
Turtle Species ◽  
Dietary Shift ◽  
Green Turtles ◽  
Loggerhead Turtles

AbstractDietary studies provide key insights into threats and changes within ecosystems and subsequent impacts on focal species. Diet is particularly challenging to study within marine environments and therefore is often poorly understood. Here, we examined the diet of stranded and bycaught loggerhead (Caretta caretta) and green turtles (Chelonia mydas) in North Cyprus (35.33° N, 33.47° E) between 2011 and 2019. A total of 129 taxa were recorded in the diet of loggerhead turtles (n = 45), which were predominantly carnivorous (on average 72.1% of dietary biomass), foraging on a large variety of invertebrates, macroalgae, seagrasses and bony fish in low frequencies. Despite this opportunistic foraging strategy, one species was particularly dominant, the sponge Chondrosia reniformis (21.5%). Consumption of this sponge decreased with increasing turtle size. A greater degree of herbivory was found in green turtles (n = 40) which predominantly consumed seagrasses and macroalgae (88.8%) with a total of 101 taxa recorded. The most dominant species was a Lessepsian invasive seagrass, Halophila stipulacea (31.1%). This is the highest percentage recorded for this species in green turtle diet in the Mediterranean thus far. With increasing turtle size, the percentage of seagrass consumed increased with a concomitant decrease in macroalgae. Seagrass was consumed year-round. Omnivory occurred in all green turtle size classes but reduced in larger turtles (> 75 cm CCL) suggesting a slow ontogenetic dietary shift. Macroplastic ingestion was more common in green (31.6% of individuals) than loggerhead turtles (5.7%). This study provides the most complete dietary list for marine turtles in the eastern Mediterranean.

scholarly journals Redescription of Charaxicephaloides polyorchis Groschaft and Tenora 1978 (Digenea: Pronocephalidae) from the green turtle Chelonia mydas in Costa Rica

2009 ◽  
Vol 46 (2) ◽  
pp. 97-99 ◽  
Author(s):  
M. Santoro ◽  
P. Brandmayr ◽  
E. Greiner ◽  
J. Morales ◽  
B. Rodríguez-Ortíz
Keyword(s):  
Costa Rica ◽  
Host Species ◽  
Green Turtle ◽  
Chelonia Mydas ◽  
Original Description ◽  
Northwest Coast ◽  
Green Turtles ◽  
New Information

AbstractCharaxicephaloides polyorchis Groschaft and Tenora, 1978 is redescribed on the basis of specimens collected from the stomach of green turtles Chelonia mydas in Costa Rica. Our specimens are consistent with the original description which was based on four flukes from the same host species from the northwest coast of Cuba. Our redescription provides a new range of variations and adds new information on this species. This represents only the second record of C. polyorchis in green turtles.

scholarly journals PEMANFAATAN DAN PENGELOLAAN KAWASAN KONSERVASI LAUT DAERAH GILI SULAT DAN GILI LAWANG

2017 ◽  
Vol 5 (2) ◽  
pp. 129
Author(s):  
Hakim Miftakhul Huda ◽  
Yesi Dewita Sari
Keyword(s):  
Economic Valuation ◽  
Management Strategies ◽  
Secondary Data ◽  
Marine Conservation ◽  
Conservation Areas ◽  
Current Management ◽  
Indirect Benefits ◽  
Fish Resources ◽  
Annual Total ◽  
Direct And Indirect Benefits

Tingginya intensitas aktivitas penangkapan ikan telah menyebabkan degradasi sumber daya ikan pada beberapa daerah penangkapan ikan. Salah satu langkah untuk menjaga keberlanjutan dan meminimalkan degradasi sumber daya ikan adalah membentuk kawasan konservasi laut daerah. Penelitian ini bertujuan untuk mengetahui pemanfaatan dan pengelolaan Kawasan Konservasi Laut Daerah (KKLD) Gili Sulat-Gili Lawang, Provinsi Nusa Tenggara Barat. Penelitian menggunakan metode valuasi ekonomi sumber daya untuk menganalisis gabungan data primer dan sekunder. Hasil penelitian menunjukkan total nilai manfaat KKLD Gili Sulat-Gili Lawang adalah Rp 8,99 milyar per tahun yang meliputi manfaat langsung dan tidak langsung. Hasil penelitian menunjukan pengelolaan terhadap KKLD ditinjau dari biaya, aktor atau pelaku dan aktivitas pengelolaan sampai saat ini belum optimal. Penelitian ini menyarankan perlunya menyusun strategi pengelolaan yang tepat untuk mengoptimalkan maksud dan tujuan dibentuknya KKLD. Tittle:  Utilization and Management of The Gili Sulat and The Gili Lawang Regional Marine Conservation Area.Highly intensive of fishing activities lead to degradation of fish resources in some fishing grounds. One effort to maintain sustainability of fish resources and minimize its degradation is to establish local marine conservation areas. This study aims to analyze utilization and management of Gili Sulat-Gili Lawang local marine conservation areas (or locally known as KKLD) in Wes Nusa Tenggara Province. This study applies economic valuation methods to analyze combination of primary and secondary data. Results of this study show that annual total benefit values of Gili Sulat-Gili Gili Lawang KKLD is IDR 8,99 billion which includes direct and indirect benefits. In terms of costs, actors and management activities, current management of KKLD is less optimal. Therefore, this study recommends to develop appropriate management strategies to optimize the purposes of KKLD establishment.

scholarly journals ASPEK MORFOLOGI, REPRODUKSI, DAN PERILAKU PENYU HIJAU (Chelonia mydas) Di PANTAI PANGUMBAHAN, KABUPATEN SUKABUMI, JAWA BARAT

2017 ◽  
Vol 3 (2) ◽  
pp. 93
Author(s):  
Adriani Sri Nastiti Krismono ◽  
Achmad Fitriyanto ◽  
Ngurah Nyoman Wiadnyana
Keyword(s):  
Green Turtle ◽  
Carapace Width ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Stratified Sampling ◽  
Hatching Rate ◽  
Brood Stock ◽  
Green Turtles ◽  
And Behavior ◽  
Nesting Season

Penyu hijau (Chelonia mydas) termasuk dalam phylum Chordata dan famili Cheloniideae. Jumlah penyu hijau yang singgah ke Pantai Pangumbahan untuk bertelur semakin menurun karena tidak terkendalinya masyarakat melakukan penangkapan induk penyu dan pengambilan telurnya. Penelitian tentang morfologi, reproduksi, dan perilaku penyu hijau sebagai salah satu dasar pengelolaan telah dilakukan di Pantai Pangumbahan pada bulan Agustus 2008. Metode penelitian yang digunakan pengambilan contoh berstrata. Penelitian ini dilaksanakan pada bulan Agustus 2008 (pada saat puncak peneluran). Parameter yang diamati antara lain ukuran penyu dari 89 ekor jumlah penyu bersarang, jumlah telur dan tingkat penetasan, serta perilaku pada saat penyu bertelur. Hasil penelitian menunjukan yang diamati diperoleh panjang karapas berkisar antara 97-15 cm dan lebar karapas 83,5-108 cm, jumlah penyu naik ke pantai 89 ekor dan penyu yang bertelur 39 ekor. Jumlah telur penyu hijau berhasil dihitung 80-105 butir per induk penyu. Bulan Agustus 2008 merupakan puncak musim peneluran. Kegiatan peneluran penyu hijau dibagi menjadi enam tahap. Upaya konservasi yang sudah dilakukan adalah penetasan telur penyu semi alami, restocking tukik, dan menjaga keamanan sarang telur penyu. Green turtles (Chelonia mydas), including the phylum Chordata and families Cheloniideae. The number of green turtles come to lay eggs Pangumbahan beach to decline because of increasingly unmanageable public do making arrests turtles brood stock and their eggs. Research on the morphology, reproduction, and behavior of green turtles as one of the basic management has been conducted on the Pangumbahan Beach in August 2008. The method used stratified sampling. The experiment was conducted in August 2008 (at the peak of nesting). Other parameters were observed between the size of the 89 tail number of turtles nesting turtles, the number of eggs and hatching rate and behavior during turtle nesting. Results obtained showed that the observed length ranges from 97- 15 cm carapace and carapace width from 83.5-108 cm, the number went up to the beach 89 sea turtle and sea turtle nesting tail as much as 39 tails. The number of green turtle eggs had counted as many as 80-105 eggs per turtles brood stock. Month August 2008 is the peak nesting season of green turtle nesting activities are divided into six stages. Conservation efforts that have been done is semi natural turtle hatchery, restocking hatchlings, and nest of turtle eggs to maintain security.

Hawksbill turtle (Eretmochelys imbricata Linnaeus 1766) and green turtle (Chelonia mydas Linnaeus 1754) nesting activity (2002-2004) at El Cuyo beach, Mexico

2006 ◽  
Vol 27 (4) ◽  
pp. 539-547 ◽  
Author(s):  
Raquel Xavier ◽  
Andre Barata ◽  
Leopoldo Palomo Cortez ◽  
Nuno Queiroz ◽  
Eduardo Cuevas
Keyword(s):  
Green Turtle ◽  
Average Distance ◽  
Biosphere Reserve ◽  
Chelonia Mydas ◽  
Eretmochelys Imbricata ◽  
Nest Location ◽  
Hurricane Ivan ◽  
Green Turtles ◽  
Nest Site Fidelity ◽  
Nesting Activity

Abstract The Yucatan Peninsula nesting hawksbill turtles' population (Eretmochelys imbricata Linnaeus 1766) is the biggest in the Caribbean and fourth in the world; within the Ría Lagartos Biosphere Reserve, at El Cuyo beach both hawksbill and green turtle (Chelonia mydas Linnaeus 1754) nest. In the present study, the nesting trend and reproductive output of both species during three consecutive nesting seasons (2002-2004) was evaluated. Night patrols from mid April to September allowed the collection of data on number of nests, nest location and size of females. The number of hawksbill and green turtles' nests decreased along these seasons. No differences were found in mean length of female turtles of both species between nesting seasons. Both species showed high nest site fidelity with average distance between nests of 3 km for Hawksbill and 1.8 km for Green turtles. The regression analysis between size and fecundity was significant (p < 0.05) for both species. The spatial variation of laid nests was also analyzed revealing that both species nested mainly on the dune zone. Predation has risen on El Cuyo beach, affecting mostly hawksbills nests. Hurricane Ivan destroyed the majority of green turtles nests in 2004.

Estimating past and present sex ratios of sea turtles in Suriname

1996 ◽  
Vol 74 (2) ◽  
pp. 267-277 ◽  
Author(s):  
Matthew H. Godfrey ◽  
N. Mrosovsky ◽  
R. Barreto
Keyword(s):  
Sea Turtles ◽  
Sex Ratios ◽  
Negative Relationship ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Dermochelys Coriacea ◽  
Green Turtles ◽  
Sand Temperature ◽  
Turtle Conservation ◽  
Sea Turtle Conservation

Leatherback (Dermochelys coriacea) and green (Chelonia mydas) sea turtles in Suriname lay eggs over several months of the year. During this nesting season, changes in rainfall produce changes in sand temperature, which in turn influence the sexual differentiation of incubating sea turtle embryos. The overall sex ratio of leatherback and green sea turtle hatchlings produced at Matapica beach in Suriname was investigated. Estimates of the sex ratios of these turtles in 1993 (green turtles 63.8% female, leatherbacks 69.4% female) were roughly 10% more female-biased than those from an earlier study in 1982. For both species, a significant negative relationship was found between monthly rainfall and monthly sex ratios. Using this relationship and data on rainfall in the past, it was possible to estimate overall sex ratios for an additional 12 years. These estimates varied considerably among different years, ranging from 20 to 90% female in the case of green turtles. Nevertheless, males tended to be produced primarily in April and May, while some females were produced in all months. Such seasonal patterns of production of turtles of different sexes have implications for sea turtle conservation programs that involve manipulating or harvesting eggs.

scholarly journals Inter- and Intra-Beach Thermal Variation for Green Turtle Nests on Ascension Island, South Atlantic

1995 ◽  
Vol 75 (2) ◽  
pp. 405-411 ◽  
Author(s):  
Graeme C. Hays ◽  
Colin R. Adams ◽  
Jeanne A. Mortimer ◽  
J.R. Speakman
Keyword(s):  
Green Turtle ◽  
Chelonia Mydas ◽  
South Atlantic ◽  
Nest Temperature ◽  
Long Beach ◽  
Thermal Variation ◽  
Green Turtles ◽  
North East ◽  
Ascension Island ◽  
East Bay

Nest temperatures for green turtles (Chelonia mydas) nesting on Ascension Island, South Atlantic (7°57'S 14°22'W), were examined. Temperature probes were placed into nests on two beaches, Long Beach (26 nests) and North East Bay (8 nests). Within these beaches there was relatively little thermal variation (SD of nest temperature was 0.32°C for Long Beach and 0.30°C for North East Bay). To examine inter-beach thermal variation temperature probes were buried at 55 cm on 12 beaches. Inter-beach thermal variation was large and was related to the beach albedo with the darkest beach (albedo, 016) being 4.2°C warmer than the lightest coloured beach (albedo, 0.73).

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