Tingkat Keberhasilan Penetasan Telur Penyu Lekang (Lepidochelys olivacea) pada Sarang Semi Alami di Pantai Boom Banyuwangi Periode Tahun 2018

Umama, Ayu Riza; Restiadi, Tjuk Imam; Prastiya, Ragil Angga; Safitri, Erma; Saputro, Amung Logam; Yudhana, Aditya; Haditanojo, Wiyanto

doi:10.20473/jmv.vol3.iss1.2020.17-24

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…The effect of shock on the early stages of egg development can occur when eggs are transferred from natural nests to be relocated to semi-natural nests. According to a personal communication with conservation authorities, egg transfer also occurs when the sand is damp, eggs exposed to moisture from the sand are moved from the bottom of the nest to the top of a semi-natural nest, in addition, eggs that fail to hatch can also be caused by eggs that are infertile and fail to fertilize (Umama et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Identification of pathogenic bacteria from eggshell of leatherback sea turtle (Dermochelys coriacea) in Lampuuk Beach, Aceh Besar using 16S rRNA gene

Sari,

Amini,

Sutriana

et al. 2024

VIS

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Currently, the leatherback turtle population in Indonesia tends to decline. One of the factors that cause turtles' existence is the turtle eggs that fail to hatch because bacteria contaminate them, 80% of the reasons turtle eggs fail to hatch are due to infection by microorganisms found on the eggshell. Turtle eggs have a soft structure and there are pores that function for gas exchange and water absorption. Microorganisms in sand can infect turtle eggs through the pores and cause hatching failure. This study aims to isolate and identify pathogenic bacteria found in leatherback turtle eggshell (Dermochelys coriacea) from Lampuuk Beach, Aceh Besar, based on the 16S rRNA gene analysis. Eight eggshell samples from leatherback turtle eggs that failed and hatched were cultured on Nutrient Agar (NA) medium. Then, the samples were inoculated on a blood agar medium for haemolysis test. Molecular identification of the 16S rRNA gene was also carried out to determine bacterial species. A total of five bacterial colonies from leatherback turtle eggshells were successfully isolated consisting of two Gram-negative bacteria (Penyu Belimbing Aceh (PBA) = PBA-1 and PBA-2 and three Gram-positive bacteria (PBA-3, PBA-4, and PBA-5). Based on the haemolysis test, the five bacterial isolates were unable to haemolyze blood. Bacterial DNA of PBA-1 and PBA-2 were successfully isolated and amplified using polymerase chain reaction (PCR) with a DNA target of ~1500 bp. Analysis using BLASTN and phylogenetic tree construction showed that PBA-1 isolate had 98.64% similarity with Acinetobacter baumannii, while PBA-2 isolate had 97.82% similarity with Enterobacter kobei. Both bacteria are members of the Enterobacteriaceae family. It can be concluded that, there were two pathogenic bacteria can potentially be opportunistic pathogens found in leatherback turtle eggshells that failed or succeeded in hatching, namely A. baumannii and E. Kobei

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Section: Discussionmentioning

confidence: 99%

Identification of pathogenic bacteria from eggshell of leatherback sea turtle (Dermochelys coriacea) in Lampuuk Beach, Aceh Besar using 16S rRNA gene

Sari,

Amini,

Sutriana

et al. 2024

VIS

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“…Telur penyu mengalami masa inkubasi sekitar 40-66 hari (Pratama & Romadhon, 2020), sehingga peneluran penyu di bulan Juni akan menetas di bulan Agustus. Adanya kegagalan penetasan telur penyu biasanya disebabkan oleh predator dan kontaminasi mikroba pada sarang, substrat sarang, suhu dan kelembaban (Nugroho et al, 2018); (Umama et al, 2020). kedalaman sarang, curah hujan, perlakuan saat pemindahan sarang, serta kondisi telur yang cacat sedari awal (infertile) (Kushartono et al, 2016).…”

Section: Gambar 2 Grafik Jumlah Penyu Mendarat Dan Bertelur DI Pulau ...unclassified

Tingkat Keberhasilan Penetasan Telur Penyu Hijau (Chelonia mydas) dan Penyu Sisik (Eretmochelys imbricata) Di Pulau Mangkai Kepulauan Anambas

Sinaga,

Hanif,

Kurniawan

et al. 2024

J. Mar. Res.

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Penyu adalah biota yang termasuk kategori hewan dilindungi, karena memiliki tingkat keterancaman punah yang tinggi dari faktor alami maupun antropogenik. Penyu menghabiskan hidupnya di laut lepas dan pergi ke daratan untuk bertelur pada setiap musimnya. Keberhasilan penetasan telur penyu menjadi hal yang penting sebagai upaya untuk menambah populasinya. Penelitian ini bertujuan untuk menganalisis keberhasilan daya tetas telur penyu hijau (Chelonia mydas) serta penyu sisik (Eretmochelys imbricata) di Pulau Mangkai Kabupaten Kepulauan Anambas. Penelitian dilakukan pada tahun 2022 di bagian utara (Pantai Empung) dan selatan Pulau Mangkai (Pantai Pantai Suit, Pantai Skanji dan Pantai Teluk Kado). Penelitian dilakukan dengan melakukan pengamatan pada kondisi pantai pendaratan, jumlah sarang, jumlah telur, probabilitas dan frekuensi penyu bertelur, persentase telur menetas, hatching success dan persentase tukik hidup dan rilis. Hasil penelitian menunjukkan bahwa terdapat dua jenis penyu yaitu penyu hijau (Chelonia mydas) dan penyu sisik (Eretmochelys imbricata) yang melakukan pendaratan di Pulau Mangkai. Probabilitas penyu bertelur terjadi selama 8 bulan dan probabilitas tertinggi didapat pada bulan Juni (100 %). Terdapat 615 sarang semi alami dan 4 sarang alami, di mana jumlah sarang tertinggi berada pada bulan Juni dengan total 164 sarang dari jenis penyu hijau. Jumlah telur yang ditemukan sebanyak 55.916 butir dan total telur yang menetas sebanyak 48.864 telur penyu. Rata-rata persentase hatching success didapatkan sebesar 86.27%, rata-rata persentase tukik hidup dan rilis sebesar 99.2%. Total tukik hidup dan yang berhasil dirilis di Pulau Mangkai sebanyak 48.276 ekor. Sea turtles are one of the protected biota species because they have a high level of endangerment from both natural and anthropogenic factors. Turtles spend their lives on the high seas and go ashore to lay their eggs every season. The success of hatching turtle eggs is essential to increase their population. This study analyzes the hatching success rates of green sea turtles (Chelonia mydas) and hawksbill sea turtles (Eretmochelys imbricata) on Mangkai Island, Anambas Islands Regency. The research was conducted in 2022 in the northern (Empung Beach) and southern parts of Mangkai Island (Suit Beach, Skanji Beach, and Teluk Kado Beach). The research was conducted by observing the conditions of the number of nests, the number of eggs, the probability and frequency of turtle laying eggs, the percentage of hatching eggs, hatching success, and the rate of live and released hatchlings. The results showed that two types of turtles, namely the green sea turtle (Chelonia mydas) and the hawksbill sea turtle (Eretmochelys imbricata), landed on Mangkai Island. The probability of laying eggs occurs for eight months, and the highest probability is obtained in June (100%). There were 615 semi-natural nests and 4 natural nests, where the highest number was in June, with a total of 164 nests of green sea turtles. The number of eggs found was 55,916, and 48,864 turtle eggs were hatched. The average percentage of hatching success was 86.27%, and the average percentage of live and released hatchlings was 99.2%. The total number of live and successfully released hatchlings on Mangkai Island was 48,276.

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“…Suhu S5 tertinggi karena suhu pasir tercampur dengan suhu air laut yang masuk ke sarang peneluran. Menurut Umama et al (2020) jika ditemui suhu sarang lebih dari 34°C selama 3 hari berturut-turut, ketika masa akhir penetasan, maka dapat menurunkan persentase kemunculan tukik ke permukaan pasir, hal ini disebabkan oleh adanya gangguan perkembangan sistem gerak tukik dan mengakibatkan kebugaran tukik menurun hingga akhirnya tidak dapat ke permukaan dan mati. Menurut Satriadi et al (2003) kadar air minimal yang diperlukan pada sarang penyu adalah 4 -6%.…”

Section: Gambar 2 Peta Kelerengan Pulau Gelasaunclassified

Karakteristik Fisik Habitat Peneluran Penyu di Pulau Gelasa, Kepulauan Bangka Belitung

Marselino,

Yusuf,

Redjeki

2024

J. Mar. Res.

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Penyu merupakan satwa yang termasuk dalam daftar merah satwa yang dilindungi karena populasinya semakin sedikit. Banyaknya perburuan telur,pencemaran alam, hingga perubahan morfodinamika alam mengakibatkan habitat hidupnya menjadi terganggu. Kondisi bentang alam yang kondusif sangat diperlukan untuk meningkatkan populasi penyu, oleh karena itu pengetahuan tentang kondisi fisik habitat yang sesuai untuk peneluran penyu sangat diperlukan. Penelitian ini bertujuan untuk mengetahui karakteristik fisik habitat peneluran penyu di Pulau Gelasa, Kepulauan Bangka Belitung. Karakteristik fisik habitat peneluran terdiri dari karakteristik pesisir hingga laut dan karakteristik sarang penelurannya. Penelitian ini dilaksanakan pada bulan Oktober 2022. Metode yang digunakan adalah metode kuantitatif dan deskriptif dengan data primer meliputi: jumlah dan telur penyu, vegetasi, kemiringan pantai, panjang dan lebar pantai, kedalaman dan diameter sarang, ukuran butir sedimen sarang, pH sarang, suhusarang, dan kelembaban sarang. Sedangkan data sekunder meliputi: data topografi dan batimetri, pasang surut air laut, angin, gelombang laut, dan arus laut. Analisis data berupa korelasi antara beberapa parameter karakteristik fisik habitat peneluran terhadap jumlah telur penyu. Hasil penelitian menunjukkan terdapat tujuh sarang peneluran, diantaranya enam bekas sarang peneluran dan terdapat satu sarang yang terdapat telur. Rata-rata karakteristik fisik habitat peneluran penyu di Pulau Gelasa ini termasuk kurang sesuai untuk peneluran, karena kondisi kelerengan yang agak curam, sehingga sarang menjadi terlalu dekat dengan permukaan air laut. Hubungan antara beberapa karakteristik fisik habitat peneluran penyu yang terukur terhadap jumlah butir telur didapatkan hubungan yang sangat kuat yaitu 96,86% dengan setiap parameter yang tidak signifikan memengaruhi jumlah butir telur. Faktorfaktor yang membuat penyu tetap melakukan peneluran di Pulau Gelasa adalah kondisi alam yang masih terjaga, sehingga penyu laut banyak mencari makan di tempat tersebut, dan yang paling unik adalah penyu memiliki insting untuk kembali ke tempat kelahirannya untuk bertelur. Sea turtles are included in the red list of protected animals because of their smaller populations. The large number of egg hunting, natural pollution, tochanges in natural morphodynamics have resulted in disturbed living habitats.Conducive landscape conditions are indispensable for increasing turtlepopulations, therefore knowledge of the physical conditions of suitable habitats forturtle nesting is indispensable. This study aims to determine the physicalcharacteristics of turtle nesting beach habitats on Gelasa Island, in BangkaBelitung Province. The physical characteristics of the nesting habitat consist of thecharacteristics of the coast to the sea and the characteristics of the nest of itsspawning. This research was conducted in October 2022. The methods used arequantitative and descriptive methods with primary data including: nests and turtleeggs, vegetation, coastal slope, length and width of the beach, depth and diameterof the nest, grain size of the nest sediment, pH of the nest, nest temperature, andnest humidity. While secondary data include: topographic and bathymetric data,tides, winds, ocean waves, and ocean currents. Analysis of correlation data betweenseveral parameters of the physical characteristics of the nesting habitat to turt leeggs. The results showed that there were seven nests, including six former nests andone nest with eggs. The average physical characteristics of turtle nesting habitatson Gelasa Island are not suitable for nesting, because the slope conditions arerather steep, so the nests become too close to sea level. The relationship betweenseveral physical characteristics of turtle nesting habitat that is measured to seaturtle eggs obtained a very strong relationship of 96.86% with each parameter thatdoes not significantly affect sea turtle eggs. Factors that make sea turtles continueto nest on Gelasa Island are the natural conditions that are still maintained, so thatsea turtles are looking for food in that place, and the most unique thing is that seaturtles have an instinct to return to their birthplace to lay eggs.

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Tingkat Keberhasilan Penetasan Telur Penyu Lekang (Lepidochelys olivacea) pada Sarang Semi Alami di Pantai Boom Banyuwangi Periode Tahun 2018

Cited by 5 publications

References 19 publications

Identification of pathogenic bacteria from eggshell of leatherback sea turtle (Dermochelys coriacea) in Lampuuk Beach, Aceh Besar using 16S rRNA gene

Identification of pathogenic bacteria from eggshell of leatherback sea turtle (Dermochelys coriacea) in Lampuuk Beach, Aceh Besar using 16S rRNA gene

Tingkat Keberhasilan Penetasan Telur Penyu Hijau (Chelonia mydas) dan Penyu Sisik (Eretmochelys imbricata) Di Pulau Mangkai Kepulauan Anambas

Karakteristik Fisik Habitat Peneluran Penyu di Pulau Gelasa, Kepulauan Bangka Belitung

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