Garuda - Garba Rujukan Digital

Comparison of Live Coral Cover in Central and South Bangka Mu'alimah Hudatwi; Umroh Umroh
Jurnal Kelautan Tropis Vol 21, No 1 (2018): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Coral reef ecosystem has many biological, ecological, and economical functions to the universe. This ecosystem provides shelter, food, and home for many marine organisms and together they perform diverse and rich ecosystem. However, this diverse ecosystem is very susceptible to environmental change, such as climate change, ocean acidification, and other anthropogenic impact. When reef-building coral could not stand with harsh condition they will eventually die. We assume that anthropogenic stressor such as turbidity, terrestrial runoff, and sedimentation is the main problem here, because of high number of tin mining activities. Bangka and Belitung Islands are huge tin producer and has been exploited heavily by the legal and illegal miner company. The purpose of this study is to investigate the live coral cover in Central and South Bangka by using the line intercept transect to calculate the live coral, died coral, and algae in each stations. The results showed that the coral cover in Central Bangka and South Bangka has fair condition (25-40% of live stony coral). Value of live and dead coral cover was 40% with Semujur and Ketawai represent the coral cover in Central Bangka. While South Bangka has slight (1-2%) difference of live coral, dead coral, and algae cover. High number of dead coral mainly composed by dead coral overgrown by algae, allegedly caused by high turbidity and sedimentation from the anthropogenic stressor. Ekosistem terumbu karang mempunyai fungsi biologi, ekologi, dan ekonomi yang bermanfaat bagi manusia. Ekosistem ini menyediakan tempat berlindung, makanan, dan rumah bagi organisme laut dan membentuk suatu ekosistem yang kaya dan beragam. Namun, ekosistem ini sangat rentan terhadap perubahan lingkungan, sepertiiklim, asidifikasi, dan dampak lain yang dilakukan manusia. Ketika terumbu karang tidak mampu bertahan dengan perubahan lingkungan yang ekstrim mereka akan mati. Kami menduga bahwa dampak antropogenik seperti turbiditas, runoff dari darat, dan sedimentasi merupakan penyebab utama kerusakan terumbu karang, karena banyaknya aktivitas penambangan. Kepulauan Bangka belitung adalah penghasil timah terbesar dan telah dieksploitasi oleh penambang timah legal maupun ilegal. Tujuan dari penelitian ini adalah untuk mengetahui tutupan karang hidup di Provinsi Bangka Tengah dan Bangka Selatan dengan menggunakan metode traksek garis. Hasil menunjukkan bahwa terumbu karang di Bangka Tengah dan Selatan termasuk kategori sedang (25- 40% tutupan karang). Tutupan karang hidup dan karang mati di Bnagka Tengah sebesar 40% dari hasill pengamatan di Semujur dan Ketawai. Sedangkan nilai tutupan karang hidup, karang mati, dan alga di Bangka Selatan mempunyai angka perbedaan yang rendah (1-2%). Tingginya tutupan karang mati tersusun oleh karang mati yyang ditumbuhi alga yang disebabkan oleh turbiditas dan sedimentasi.

Distribusi Bahan Organik pada Sedimen Permukaan Teluk Kelabat, Pulau Bangka Mohammad Agung Nugraha; Mu’alimah Hudatwi
Jurnal Kelautan Tropis Vol 23, No 3 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i3.6703

Transport of organic material in coastal areas plays an important role in the global biogeochemical cycle. The purpose of this study was to examine the distribution of organic material in sediments and to identify sources of organic material in the Kelabat Bay waters. TOC and TN sediments were analyzed by the Walkley Black and Kjeldahl method. The value of TOC, TN, and C/N ratio obtained in the Kelabat Bay waters sediments ranged from 0.04-7.25%, 0.04-0.14%, and 0.67-65.91. The distribution of TOC, TN, and C/N ratio in Kelabat Bay sediments shows that the value in the inner Kelabat Bay is higher than the outside. The source of organic material input in the inner Kelabat Bay comes mainly from terrestrial, while the outer Kelabat Bay mainly comes from aquatic. Transport bahan organik pada wilayah pesisir memainkan peran penting dalam siklus biogeokimia secara global. Tujuan penelitian ini untuk mengkaji distribusi bahan organik pada sedimen serta identifikasi sumber bahan organik perairan Teluk Kelabat. TOC dan TN sedimen dianalisis dengan metode Walkley Black dan Kjeldahl. Nilai TOC, TN, dan rasio C/N yang diperoleh pada sedimen perairan Teluk Kelabat berkisar antara 0,04-7,25%, 0,04-0,14%, dan 0,67-65,91. Distribusi TOC, TN, serta rasio C/N pada sedimen Teluk Kelabat memperlihatkan nilai pada Teluk Kelabat bagian dalam lebih tinggi dibandingkan bagian luar. Sumber masukan bahan organik pada Teluk Kelabat bagian dalam utamanya berasal dari terestrial, sedangkan Teluk Kelabat bagian luar utamanya berasal dari akuatik.

IDENTIFIKASI JAMUR MIKROSKOPIK DARI TAMBAK UDANG Litopenaeus vannamei SISTEM SEMI-INTENSIF Lisnawati Sinaga; Rahmad Lingga; Budi Afriyansyah; Mu'alimah Hudatwi
EKOTONIA: Jurnal Penelitian Biologi, Botani, Zoologi, dan Mikrobiologi Vol 5 No 1 (2020): Ekotonia: Jurnal Penelitian Biologi, Botani, Zoologi dan Mikrobiologi
Publisher : Department of Biology, Faculty of Agriculture, Fisheries and Biology, University of Bangka Belitung

Litopenaeus vannamei is one of the most common shrimp species cultivated with the semi-intensive system in Indonesia. This system required large food and probiotic input during cultivation and certainly will impact the water quality and the presence of the microbial colony. The unhealthy water circulation will increase microbe pathogen. Fungi is one of ubiquitous microbe that often appears in shrimp pond. The aim of this study is to identify and calculate the biology index from shrimp cultivation ponds. This research was implemented in March 2019 – April 2020. The method of this research is purposive sampling to get the fungi culture from inlet, outlet and rejuvenate shrimp ponds. The identification of fungi was done with macroscopic and microscopic examination. The result found 9 isolates fungi comprised of 8 species. There were 4 fungi identified from the inlet shrimp pond, Aspergillus sp 1, Aspergillus sp 4, Penicillium sp, and Trichoderma sp 2, while from outlet pond were Aspergillus sp 1, Trichoderma sp 1 and from rejuvenating shrimp ponds were Saccharomyces cerevisiae, Trichoderma sp 1 and Penicillium sp. There were no fungi found from L. vannamei, because all of the L. vannamei shrimp in healthful condition.

Improvement of Catfish (Claris sp.) Production on Limited Land in Bukit Dempo Village, Belinyu Sapto Andriyono; Patmawati Patmawati; Muhamad Amin; Ahmad Fahrul Syarif; Mu’alimah Hudatwi
Journal of Aquaculture and Fish Health Vol. 11 No. 2 (2022): JAFH Vol. 11 No. 2 June 2022
Publisher : Department of Aquaculture

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jafh.v11i2.23209

The potential of freshwater fisheries in Bangka Regency, Bangka Belitung Province, is sufficient to support fisheries activities in this area. An activity that is quite prominent is catfish farming using swamps and tarpaulin ponds on limited land. In this study, the analysis of cultivation activities was carried out on the Bukit Dempo community group who became partners in the national community service activities, in cooperation with Universitas Airlangga and Bangka Belitung University. Characteristics of the pond using a combination of fixed nets with a net diameter of 0.5 cm. In the pond also found water plants in the form of water hyacinth which is expected to be able to make a symbiotic use of the organic material that has been left behind from feed and catfish waste. The cultivation system is classified as semi-intensive with a combination of commercial feed with high protein (31-33%). The main problem in this cultivation system is low productivity and the lack of technology applied in an effort to increase production efficiency Furthermore, high production yields are marketed to Pangkal Pinang City and also to local areas around the Belinyu sub-district. Technical constraints include Motile Aeromonas Septicemia (MAS) due to the bacterium Aeromonas hydrophylla, which causes about 10% of mortality in commodities before harvest. There has been no treatment action in overcoming the disease, so it is necessary to be careful in avoiding death due to disease by observing catfish at the change of seasons.

Fitness of Cassiopea polyps Inoculated with Different Types of Symbionts Mu'alimah Hudatwi; Diah permata Wijayanti; Ambariyanto Ambariyanto; Michio Hidaka
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 2 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.2.151-158

The specificity of the relationship between cnidarian hosts and symbiotic dinoflagellates (zooxanthellae) differs among host species. Some cnidarian hosts can establish symbiotic relationship with various types of zooxanthellae, while others exhibit high fidelity to specific symbiont type. It is not known how compatibility or specificity of the relationship is determined. We hypothesized that some cnidarian hosts select symbiont type that leads to highest fitness when the host is flexible with symbiont type and more than one types of symbionts are available. As a first step to study this possibility, compatibility of clonal polyps of Cassiopea sp. with six strains of cultured zooxanthellae and the fitness of the host associated with different types of symbionts were studied. Polyp diameter was measured and the number of asexual buds were calculated as a measure of host fitness. The number of zooxanthellae in host and in asexual buds was also measured as a measure of symbiont fitness. Three strains KB8 (clade A), Y106 (clade A), and K100 (clade B) were compatible with the Cassiopea polyps, while other three strains, Y103 (clade C), K111 (clade D), and K102 (clade F) were incompatible. No clear difference in the fitness was found among the polyps inoculated with compatible and incompatible symbiont strains. In one experiment, a compatible strain Y106 seemed to decrease host fitness, but this should be checked by further studies. This study suggests that feeding regimes and long observation period might be important when fitness of hosts associated with different types of symbionts is investigated.

Sebaran Nitrat dan Kelimpahan Fitoplankton di Pantai Tanah Merah dan Pulau Semujur Muh. Yusuf; Aditya Pamungkas; Mu’alimah Hudatwi; Irvani
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 2 No 2 (2020): November
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v2i2.45

The waters of Tanah Merah beach waters and Semujur Islands waters are both located in Bangka Tengah Regency. Geographically it can be indicated Tanah Merah is quite far from residential areas, while the other locations are in the inhabited small island waters (Semujur). These different geographical conditions can cause the content of nitrate nutrients to be different because the main source of nitrate nutrients comes from human activities. High nitrate nutrients will affect the abundance of phytoplankton in local waters. This study aims to determine the value and nitrate in relation to the abundance of phytoplankton in the sea. Moreover this research was applied in Tanah Merah beaches waters and Semujur Island waters, Bangka Tengah Regency, from February to April 2020. The results shown that the nitrate content in Tanah Merah beaches waters was 0.011-0.026 mg/LT (St.1-St.4) which was lower compared of 0.046-0.10 mg/L (St.9-St.12) at Semujur Island waters. Phytoplankton abundance data and Species Diversity Index (H ') show that the Tanah Merah beaches waters are 111,000-134,000 cells/L and the H' index is 2.06-2.16 lower than the phytoplankton abundance data in Semujur Island waters of 110,000 - 208,000 cells/L and the H 'index of 2.22-2.29. Others evident to support that data are the current velocity in Tanah Merah beaches waters ranges from 0.014-0.21 m/s less than Semujur Island waters at 0.22-0.32 m/s.

Sebaran Nitrat dan Kelimpahan Fitoplankton di Pantai Tanah Merah dan Pulau Semujur Muh. Yusuf; Aditya Pamungkas; Mu’alimah Hudatwi; Irvani
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 2 No 2 (2020): November
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v2i2.45

The waters of Tanah Merah beach waters and Semujur Islands waters are both located in Bangka Tengah Regency. Geographically it can be indicated Tanah Merah is quite far from residential areas, while the other locations are in the inhabited small island waters (Semujur). These different geographical conditions can cause the content of nitrate nutrients to be different because the main source of nitrate nutrients comes from human activities. High nitrate nutrients will affect the abundance of phytoplankton in local waters. This study aims to determine the value and nitrate in relation to the abundance of phytoplankton in the sea. Moreover this research was applied in Tanah Merah beaches waters and Semujur Island waters, Bangka Tengah Regency, from February to April 2020. The results shown that the nitrate content in Tanah Merah beaches waters was 0.011-0.026 mg/LT (St.1-St.4) which was lower compared of 0.046-0.10 mg/L (St.9-St.12) at Semujur Island waters. Phytoplankton abundance data and Species Diversity Index (H ') show that the Tanah Merah beaches waters are 111,000-134,000 cells/L and the H' index is 2.06-2.16 lower than the phytoplankton abundance data in Semujur Island waters of 110,000 - 208,000 cells/L and the H 'index of 2.22-2.29. Others evident to support that data are the current velocity in Tanah Merah beaches waters ranges from 0.014-0.21 m/s less than Semujur Island waters at 0.22-0.32 m/s.

Identifikasi Jenis Bivalvia Pada Ekosistem Mangrove Di Sekitar Perairan Kota Pangkalpinang Adelia Erika; Mu'alimah Hudatwi; Irma Akhrianti
Journal of Marine Research Vol 11, No 4 (2022): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v11i4.34036

Hutan mangrove merupakan salah satu ekosistem pesisir yang memiliki produktivitas yang tinggi sehingga dapat memberikan kontribusi yang besar terhadap biota yang hidup didalamnya, salah satunya yaitu bivalvia. Secara ekologis mangrove berfungsi sebagai daerah asuhan, tempat mencari makan, dan pemijahan bagi bivalvia. Penelitian ini bertujuan untuk mengetahui jenis bivalvia yang ditemukan pada ekosistem mangrove, mengetahui nilai indeks ekologi bivalvia, serta mengetahui hubungan antara bivalvia dengan kerapatan mangrove dan parameter lingkungan. Penelitian ini dilaksanakan pada bulan Februari-April 2021 di empat stasiun yang berbeda yaitu Pantai Tanjung Bunga, Muara Serata Pasir Padi, Pantai Koala Jembatan Emas, dan Pelabuhan Pangkal Balam. Pengambilan data dalam penelitian ini menggunakan metode line transect yang ditarik dari arah laut ke darat, kemudian diletakkan tiga plot transek dengan ukuran 10x10m yang berbentuk zig-zag dengan ulangan 9 plot transek mangrove yang terdiri dari 3 sub stasiun pengamatan. Hasil penelitian menunjukkan bahwa ditemukan bivalvia sebanyak 472 individu dari 23 spesies dan 9 family. Nilai indeks keanekaragaman tertinggi terdapat pada stasiun 3 yaitu 3,187. Indeks keseragaman tertinggi terdapat pada stasiun 4 dengan total nilai 0,267. Indeks dominansi nilai tertinggi terdapat pada stasiun 2 yaitu 0,405. Hasil analisis komponen utama (Principal Component Analysis) menunjukkan bahwa nilai hubungan keanekaragaman bivalvia dengan nilai kerapatan mangrove pada penelitian ini menunjukkan hubungan korelasi positif yang dengan nilai r = (0,57). Sedangkan, faktor fisika-kimia yang mempengaruhi keanekaragaman bivalvia adalah salinitas dengan nilai r = (0,95) dan pH dengan nilai r = (0,94). Mangrove is one of the coastal ecosystems with has high productivity for major contribution to the biota that live in it, one of which is bivalves. Ecologically, mangroves function as nursery ground, feeding ground and spawning ground for bivalves. This study aims to determine the type of bivalves found in mangrove ecosystems, to determine the value of the ecological index of bivalves, and to determine the relationship between bivalves and mangrove density and environmental parameters. This research was carried out in February-April 2021 at four different stations, namely Tanjung Bunga Beach, Muara Serata Pasir Padi, Golden Bridge Koala Beach, and Pangkal Balam Port. Data retrieval in this study used the line transect method which was drawn from the sea to the land, then three transect plots with a size of 10x10m in a zig-zag shape were placed with 9 replications of mangrove transect plots consisting of 3 sub-stations of observation. The results showed that there were 472 individuals of bivalves from 23 species and 9 families. The highest diversity index value is found at station 3, which is 3,187. The highest uniformity index is at station 4 with a total value of 0.267. The highest value dominance index is found at station 2, which is 0,405. The results of the principal component analysis (Principal Component Analysis) show that the value of the relationship of bivalve’s diversity with the value of mangrove density in this study shows a strong positive correlation with the value of r = (0,57). Meanwhile, the physico-chemical factors that affect the diversity of bivalves are salinity with a value of r = (0,95) and pH with a value of r = (0,94).

KEANEKARAGAMAN JENIS PLANKTON DI PERAIRAN BATU BELUBANG DAN PULAU PANJANG KABUPATEN BANGKA TENGAH SEBAGAI INDIKATOR KUALITAS PERAIRAN Herlena Novrilianty; Mu’alimah Hudatwi; Eva Utami
Jurnal Perikanan Unram Vol 12 No 3 (2022): JURNAL PERIKANAN
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jp.v12i3.325

Plankton adalah organisme mikroskopis yang memiliki peranan yang sangat penting yaitu sebagai dasar dari kehidupan, khususnya dalam kehidupan perairan pelagis. Plankton digolongkan menjadi dua jenis yaitu : fitoplankton dan zooplankton. Penelitian ini bertujuan untuk mengetahui jenis plankton, mengidentifikasi hubungan keanekaragaman jenis plankton dengan parameter fisika dengan analisis statistik, dan mengidentifikasi indeks keanekaragaman jenis plankton di Perairan Pantai Batu Belubang dan Pulau Panjang. Waktu dan tempat penelitian ini dilaksanakan pada bulan Bulan Maret 2021 di Perairan Pantai Batu Belubang dan Pulau Panjang Kecamatan Pangkalan Baru Kabupaten Bangka Tengah. Pengambilan data dalam Penelitian ini menggunakan metode random sampling dimana berdasarkan hasil survei yang telah dilakukan. Hasil penelitian menunjukkan bahwa di perairan Pantai Batu Belubang dan Pulau Panjang ditemukan 30 spesies plankton yang terdiri dari 13 family dan total berjumlah 286 spesies dengan indeks keanekaragaman tergolong sedang, indeks keseragaman tergolong tinggi dan untuk indeks dominansi tergolong rendah. Hasil korelasi menunjukkan bahwa memiliki hubungan korelasi yang berbeda-beda nilai dan arahnya.

KEPADATAN DAN KEANEKARAGAMAN MAKROZOOBENTOS PADA EKOSISTEM MANGROVE DI DESA KURAU BARAT Ana Santya; Irma Akhrianti; Mu’alimah Hudatwi
Jurnal Perikanan Unram Vol 13 No 3 (2023): JURNAL PERIKANAN
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jp.v13i3.648

Ekosistem mangrove berperan penting terhadap lingkungan seperti melindungi daerah pantai, menyediakan sumber makanan, menjadi tempat pemijahan (spawning ground), mencari makan (feeding ground) dan daerah asuhan (nursery ground) bagi biota yang hidup didalamnya seperti makrozoobentos. Penelitian ini bertujuan untuk mengetahui komposisi makrozoobentos yang ditemukan pada ekosistem mangrove, mengetahui kepadatan, indeks ekologi makrozoobentos serta pengaruh parameter sedimen dan kerapatan mangrove terhadap makrozoobentos. Penelitian ini dilakukan bulan Desember 2022 bertempat pada ekosistem mangrove Desa Kurau Barat. Pengambilan data mangrove menggunakan metode transek garis yang ditarik dari laut ke darat, kemudian dibuat tiga petak transek berukuran 10 x 10 m2. Pengambilan data makrozoobentos dilakukan menggunakan transek kuadran ukuran 1 x 1 m2. Hasil pengamatan ditemukan makrozoobentos sebanyak 742 individu terdiri dari 9 famili dan 14 spesies, didominasi oleh kelas gastropoda. Kepadatan makrozoobentos berkisar antara 33 – 51 ind/m2. Indeks keanekaragaman dengan nilai yaitu 1,224 – 1,631. Indeks keseragaman dengan nilai 0,436 – 0,544 dan indeks dominansi dengan nilai 0,399 - 0,475. Hasil analisis PCA (Principal Components Analysis) menunjukkan keanekaragaman makrozoobentos terhadap parameter sedimen yaitu fosfor dengan nilai 0,863 memiliki pengaruh yang sangat kuat, kerapatan mangrove terhadap keanekaragaman makrozoobentos dengan nilai 0,140 berarti tidak dominan berpengaruh. Hasil analisis CA (Correspondence Analysis) terbentuk 3 kelompok didapatkan bivalvia hanya ditemukan di stasiun 1, stasiun 2 dan 3 memiliki karakteristik habitat relatif sama, sedangkan stasiun 4 ditemukan makrozoobentos yang cenderung rendah.

Title

Found 10 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 10 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 10 Documents
Search