The aim of the study was to describe the coral reef condition Background: in Bangka Belitung Islands, particularly from Gaspar Strait. This research location is well known for its underwater archaeological discovery and shipwreck sites. Recent increases in mining, fishing and tourism activities in the surrounding islands might have affected the condition of the coral reef.Nine islands inside the strait were visited (i.e. Langer, Kembung, Methods: Piling, Aur, Salma, Pongok, Celagen, Kelapan, and Lepar Island), and a line transect was used to observed coral reef conditions.Coral cover was found to be predominantly in fair conditions Results: (25-50%). Coral mortality index also tended to be high, which indicated that the coral reef ecosystem was in threatened conditions. Previous and recent reports also reported the same condition as found by this study.Degradation of the coral community in Bangka Belitung Conclusion: Islands is likely caused by human activities. This suggests that increasing human activities significantly affects the coral reef condition. Protection of coral reefs with sustainable management for mining activity, tourism and fishing practices are needed.
One of the biota that lives in the sandy beach area is the Ghost Crab. These crabs are very common in the tropical and subtropical region. Bangka Regency has many sandy beaches and also a habitat spread of ghost crabs. This study aims to analyze the density of Ghost Crab (Ocypode) and the differences in the size of the carapace length with the weight of crab and the sex of the Ghost Crab in Batu Bedaun Beach and Air Anyir Beach. The results showed there were differences in ghost crab density on both beaches. Ghost Crab from Batu Bedaun 10556 individuals / km² and Air Anyir Beach 3333 individuals / km². The environmental parameters on both beaches are not much different, but in Batu Bedaun Beach has more suitable than Air Anyir Beach
ABSTRAKProduksi cumi-cumi (Loligo sp) masih sangat tergantung dari hasil tangkapan, sehingga jumlahnya sangat bergantung dengan kondisi alam. Jumlah hasil tangkapan cumi-cumi (Loligo sp) yang terus ditingkatkan namun tidak diiringi dengan kegiatan pengayaan stoknya, maka untuk mempertahankan populasi cumi-cumi diperlukan teknologi terapan yang dapat membantu cumi-cumi (Loligo sp) mudah berkembang biak. Atraktor cumi-cumi merupakan salah satu teknologi yang dapat diaplikasikan untuk membantu pengayaan stok cumi-cumi (Loligo sp) di alam. Atraktor ini dapat dibuat dari berbagai jenis bahan dan berbagai bentuk, tergantung dari mudah didapatnya bahan untuk pembuatan atraktor. Penelitian atraktor cumi-cumi (Loligo sp) yang berbeda bentuk dan bahan dilakukan di Perairan Tuing, Kabupaten Bangka, Provinsi Kepulauan Bangka Belitung pada bulan Oktober 2012 sampai bulan Juni 2013. Enam buah atraktor berbentuk kotak dari bahan kayu dan enam buah atraktor berbentuk silinder dari drum bekas diteliti untuk mengetahui keefektifan dari dua bentuk atraktor. Atraktor dipasang pada kedalaman 3-5m dengan cara berselingan antara bentuk kotak dan silinder. Hasil penelitian menunjukkan bahwa penempelan telur cumi-cumi (Loligo sp) lebih banyak pada atraktor bentuk silinder yang mencapai 95% dibandingkan dengan bentuk kotak yang hanya 5%. Atraktor cumi-cumi bentuk silinder dari drum bekas lebih efektif karena bentuknya yang seperti gowa yang dapat menarik atau merangsang cumi-cumi (Loligo sp) untuk menempelkan telurnya.
The high demand for tin as a raw material requires tin producers to generate large quantities for use in various products. Several companies, both state-owned and private, are vying to increase production through the exploration and exploitation of tin resources on land and water. Mining activities on the Bangka Belitung Islands, especially offshore mining activities, have a positive economic impact for the local community. However, these activities have had negative effects, too, such as the environmental degradation of marine ecosystems-when, for instance, the mining activities have not been conducted according to the principles of mining environmentally and sustainably. Thus, extensive mining has caused changes, such as damage to mangrove forests and an increasing amount of fine sediment and suspended soil at the bottom of the sea. Mangrove damage will make the islands more vulnerable to the sea water, while the addition of fine sediment to the sea will increase turbidity and reduce the amount of light available for photosynthesis, creating a hostile environment for coral and fish and thus reducing their populations. PT TIMAH Tbk is one of the state-owned companies engaged in tin mining; it has permission to mine in the sea with as many as 27 permits or an area of 184,672 hectares. PT TIMAH Tbk has conducted offshore reclamation (rehabilitation) as one of its obligations as a mining company. This has included planting mangroves (35,000 stems), providing fish shelters and transplanting coral (861 units). The results of the mangrove planting cannot yet be determined due to the short observation period. However, the coral transplantations and fish shelters are showing better results because these two programs are creating promising artificial habitats for coral and fish.
Sungai Penyerang merupakan salah satu sungai yang berada di Desa Kayu Besi, Kabupaten Bangka. Perbedaan musim juga dapat menyebabkan perubahan kondisi lingkungan di ekosistem Sungai sehingga berdampak langsung pada penurunan keanekaragaman jenis ikan dan komposisi jenis. Penelitian ini bertujuan untuk menganalisis pengaruh musim terhadap keanekaragaman jenis ikan yang terdapat di Perairan Sungai Penyerang. Penelitian dilaksanakan pada bulan Januari–Maret 2018. Penelitian ini dilaksanakan di 6 stasiun pengamatan, 2 di bagian hulu, 2 di bagian tengah dan 2 di bagian hilir. Alat tangkap yang digunakan untuk sampling ikan yaitu jaring tarik, gill net dan serok. Sampling ikan dilakukan pada pagi hari sampai sore hari dan dari sore hari sampai pagi hari. Hasil ikan yang tertangkap sebanyak 470 individu terdapat 8 famili, 11 genus, dan 5 Spesies. Indeks keanekaragaman ikan pada stasiun I=1,461, stasiun II=1,543, stasiun III=1,674, stasiun IV=1,803, stasiun V=1,566 dan stasiun VI =1,873, termasuk dalam kriteria yang tergolong sedang. Berdasarkan analisis uji One-Way Annova untuk perbedaan musim terhadap keanekaragaman jenis ikan didapatkan nilai p value> 0,05 adalah 0,631 yang berarti tidak berbeda nyata.
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