Distribution of Nesting Site of Green Turtle (Chelonia mydas) in Sangalaki Island of Derawan Islands, Berau District

https://doi.org/10.22146/jfs.26214

Andi Ibrahim(1*), Djumanto Djumanto(2), Namastra Probosunu(3)

(1) Department of Fisheries, Faculty of Agriculture, Universitas Gadjah Mada
(2) Department of Fisheries, Faculty of Agriculture, Universitas Gadjah Mada
(3) Department of Fisheries, Faculty of Agriculture, Universitas Gadjah Mada
(*) Corresponding Author

Abstract


Population of green turtle (Chelonia mydas) that laid their eggs in the Derawan Islands conservation area was declined due to various factors. The aim of this study was to determine the number of egg that was laid down into the nest for each green turtle parent and its correlation to shade, sandy beach width, and moon phase. The study was conducted from 24 January to 31 March 2015 in the Sangalaki Island. The observation of the broods stock was done by walking down the beach in the night to find out the broodstock that laid the eggs and counted the number. A sign was given to the nest of broodstock that finished laying the eggs. On the following day, nest excavation, egg collection, and the environmental measurement were conducted. Environmental conditions were measured include the depth of the nest, substrate temperature, the distance of the nest site to the shading trees and the border line of lowest tide. Data analysis was done descriptively by counting the number of eggs and environmental parameters. The results show that the average number of egg per nest was 97 items with the range of 45 - 127 items, the length of the carapace was 96 cm with a range of 86 - 107 cm, the average depth of the nest hole was 73 cm with a range of 56 - 87 cm. Broods stock of green turtle that laid more eggs would dig nest hole deeper, but there was no correlation between the carapace length and the number of the laid eggs. The average number of green turtle broods stock that lay eggs in the Sangalaki Island was 486 individual/ month with the range of 168 - 1085 individu/month. The west and east seasons affect the frequency of nesting and the laid eggs. The frequency of spawning occured throughout the year and the highest spawning frequency occured in August which coincides with the peak of the East Season. The frequency of spawning during the East Season was four times higher than during the West season. The frequency of green turtle landing was not affected by the lunar phase. Based on the location of laying egg, the beaches that were selected for laying egg are located in the northwest, northeast, and south parts of the Sangalaki Island. The Green turtle nests were commonly found in the vegetation shading areas (64%) than open sand areas (36%).

Keywords


egg laying season; green turtles; sangalaki island

Full Text:

PDF


References

Adnyana, I.B.W & C. Hitipeuw. 2009. Panduan Melakukan Pemantauan Populasi Penyu di Pantai Peneluran di Indonesia. WWF-Indonesia Marine Program. Jakarta.

Adnyana, W., L.P. Soede, G. Gearheart & M. Halim. 2007. Status of green turtle (Chelonia mydas) nesting and foraging populations of Berau, East Kalimantan, Indonesia, including result from tagging and telemetry. Indian Ocean Turtle Newsletter.

Ahmad, A., K.Y. Ku Kassim, T. Zulkifli, M.I. Mahyam & A.R. Solahudi. 2006. A guide for tagging of sea turtles in the Southeast Asian region. MFRDMD/SP/11. Kuala Terengganu, Malaysia. 62 pp.

Akira, R., I. N. Wandia & W.B Adyana. 2012. Komposisi genetik penyu hijau (Chelonia mydas) hasil tangkapan liar dari Nusa Tenggara Barat (Bima dan Teluk Cempi). Indonesia Medicus Veterinus 1(1): 22-36.

Ali, A., K.Y. Ku Kassim, A. R Solahuddin & T. Zulkifli. 2005. Individual nest site preference of green turtle, Chelonia mydas, on mak kepit beach and its relation with hatching emergence success. Marine Fishery Resources Development and Management Department. pp. 45-49

Broderick, A.C., F. Glen, B. J. Godley & G. C. Hays. 2003. Variation in reproductive output of marine turtles. J. Exp. Mar. Biol. Ecol. (288): 95-109.

Budiastuti, A. R. 2012. Pengaruh Beda Waktu Pengambilan Telur Terhadap Daya Tetas Telur Penyu Hijau (Chelonia mydas) di Pulau Mataha, Kepulauan Derawan, Kalimantan Timur. Jurusan Teknologi Pengelolaan Sumberdaya Perairan. Sekolah Tinggi Perikanan. Jakarta.

Dick, B. 2005. Green Sea Turtle (Chelonia mydas). Pro Tempore Secretariat of the Inter-American Convention for the Protection and Conservation of Sea Turtles (IAC). San Jose. Costa Rica.

Djohan, T. S. 2004. Konservasi Habitat Penyu. Workshop Evaluasi dan Monitoring Kelembagaan Konservasi Penyu. Badan Pengendalian Dampak Lingkungan Daerah. Yogyakarta.

Hirth, H. F. 1971. Synopsis of Biology Data on The Green Turtle, Chelonia mydas (Linnaeus 1758). FAO. Fisheries Synopsis.

Kamel, S.J. & N. Mrosovsky. 2004. Nest site selection in leatherbacks, Dermochelys coriacea: individual patterns and their cosequences. Animal Behaviour 68: 357-366.

Law, A. 2009. The Influence of Lunar Phases, Weather nd Tidal Patterns on The Nesting Activity of Adult Female Leatherbacks (Dermochelys coriaceae) in Tobago, West Indies. Division of Environmental and Evolutionary Biology. University of Glasgow. Research report.

Machfudhi, A. 2014. Preferensi Lokasi Bersarang Penyu Hijau (Chelonia mydas) Di Pulau Sangalaki Kalimantan Timur. Fakultas Kehutanan. Universitas Gadjah Mada. Tesis.

Mukminin, A. 2002. Studi Habitat Peneluran Penyu Hijau (Chelonia mydas, L) Di Pulau Sangalaki, Kepulauan Derawan, Kabupaten Berau, Kalimantan Timur. Fakultas Perikanan dan Ilmu Kelautan. Institut Pertanian Bogor. Skripsi.

Nuitja, I.N.S. 1992. Biologi dan Ekologi Pelestarian Penyu Laut. IPB Press, Bogor.

Pritchard, P.C.H. & J.A Mortimer. 1999. Taxonomy, External Morphology and Species Identification. Research and Management Techniques for the Conservation of Sea Turtles. No.4.

Salamsyah, I.J. 2004. Analisis Populasi Penyu Hijau (Chelonia mydas, Linnaeus 1758) di Pantai Pangumbahan Kabupaten Sukabumi. Fakultas Perikanan dan Ilmu Kelautan. Institut Pertanian Bogor. Skripsi.

Sparre, P. & Venema S.C. 1998. Introduction to Tropical fish stok assessment. Part. 1. Manual. FAO fisheries technical Paper. No. 306.1. Rev. 2. 407 p.

Susilowati, T. 2002. Studi Parameter Biofisik Pantai Peneluran Penyu Hijau (Chelonia mydas, L) di Pantai Pangumbahan Sukabumi Jawa Barat. Fakultas Perikanan dan Ilmu Kelautan. Institut Pertanian Bogor. Skripsi.

Taylor, R., R. Chatto & J. Woinarski. 2006. Green Turtle (Chelonia mydas). Department of Natural Resources, Evironmental and the Arts. Northern Territory Government.



DOI: https://doi.org/10.22146/jfs.26214

Article Metrics

Abstract views : 4112 | views : 16579

Refbacks

  • There are currently no refbacks.




Copyright (c) 2016 Jurnal Perikanan Universitas Gadjah Mada

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Jurnal Perikanan Universitas Gadjah Mada (print ISSN 0853-6384; online ISSN 2502-5066) is published by Department of Fisheries, Universitas Gadjah Mada in collaboration with Semnaskan UGM (Seminar Nasional Tahunan Hasil Perikanan dan Kelautan) and ISMFR (International Symposium on Marine and Fisheries Research).

 

View My Stats