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STUDI KANDUNGAN KITOSAN CANGKANG KAPAH (Meretrix sp.) DI PANTAI AMAL LAMA Prayogo, Edy; Rachmawani, Dori
Jurnal Harpodon Borneo Vol 4, No 2 (2011): Volume 4 No 2 Oktober 2011
Publisher : Jurnal Harpodon Borneo

Chitosan is a polysaccharide that obtained by deacetylation of chitin. In this present day, chitosan been widely applicated and exploited in many sector of human life. Oriental hard clam was which one of fisheries commodity of Tarakan city, however it shells not yet been optimally exploited. The purpose of this research was to know the content of chitosan in oriental hard clam shell at Amal Lama beach. Sample determined by purposive sampling method. Meanwhile the isolation chitosan are using Hong and Knorr methods. The data that collected is chitosan content (mg) in each of ten shells, analyzed by linear regression test. Based on result of the research, known that chitosan content on each shells of oriental hard clam was -4,594 grams and every 1 cm wide addition of shell would increased the chitosan that consist on it amount to 1,329 grams. Furthermore, the result of regression linear test showed that size of Kapah shell affecting chitosan content in it, with contribution of 85,9% and the remain 14,1% are influenced by other factors.Keywords : Oriental hardclam, chitosan content, Amal Lama beach

ANALISIS KELIMPAHAN POPULASI Telescopium telescopium DI KAWASAN KONSERVASI MANGROVE DAN BEKANTAN KOTA TARAKAN Gazali, Salim; Rachmawani, Dori; Mathius, Kristiani Rani
Jurnal Harpodon Borneo Vol 10, No 2 (2017): Volume 10 No.2 Oktober 2017
Publisher : Jurnal Harpodon Borneo

Research objectives is to know abundance of offerings shared with percent of the population T.telescopium in a habitat of those mangrove KKMB the city of Tarakan. The research uses a method of descriptive method. The sample collection be paid out starting on different stations in the regions KKMB and stations 2 in the expansion of KKMB. Each station also carried out 6 plot with the size of 10x10 meters with the methods purposive the sampling method. The sample collection t.telescopium performed on recede lowest and extraction of secondary data of a variable pH, salinitas and at such a temperature (in-situ) and analysis of a sample of sediment. The results of the study abundance T.telescopium is highest in the expansion of the average value of station KKMB 0,102 ind/m2 and on the average value of station KKMB 0,088 ind/m2. Based on analysis substratum research the ground in two stations of different there are different substratum dominant the dust was 48% in KKMB and types of the substrate at the station KKMB down the dust was 51 %. Based on the results of the analysis that pH and the temperature at two stations of different having the value of the average the same situation namely that 7-8 and 27-28oC.The measurement result salinitas in both station average range 28ppt – 30ppt.

STUDI KANDUNGAN KITOSAN PADA KEONG BAKAU (Telescopium sp) DI KAWASAN KONSERVASI MANGROVE KELURAHAN PAMUSIAN KOTA TARAKAN ., Hendrawan; Rachmawani, Dori
Jurnal Harpodon Borneo Vol 4, No 2 (2011): Volume 4 No 2 Oktober 2011
Publisher : Jurnal Harpodon Borneo

The purpose of this research is to know the chitosan content on telescope snail (Telescopium sp) in mangrove conservation area of Tarakan city. Sample was determined and been measured in the location (in situ), and the chitosan content test was done in Water Quality Laboratory of Marine and fisheries faculty of Borneo Tarakan University. The result was conducted in mangrove conservation area of Tarakan city from December 2010 to May 2011 include preparation, implementation research (data collection, processing and data analysis and report). Result shows that the length of the shell effect on the chitosan content in telescope snail shell and contribution of length shells based on the overall test as much 385,1856 grams of shell powder produced 33,0863 grams chitosan. Keywords : Shell length, Chitosan content, Mangrove conservation of Tarakan city.

STRUKTUR KOMUNITAS GASTROPODA PADA KOMUNITAS MANGROVE DI PANTAI AMAL LAMA KOTA TARAKAN Rachmawani, Dori
Jurnal Harpodon Borneo Vol 3, No 1 (2010): Volume 3 No. 1 April 2010
Publisher : Jurnal Harpodon Borneo

The study of structure communities gastropoda was since at communities mangrove in OldAmalBeachon November 2009. Taking sample do by using method transek quadrate. The analysis of data was density, abundance, and frequency presence use formula krebs (1978) and Index unity, Index dominansi and Suitability use formula odum (1994). The result of the research was show kind gastrophoda meet consist of 5 species from superfamily buccinacea, Family melongenidae, Genus melongena schumacher, With a few species are melongena funnel, Melongena patula, Pugilina morio, Pugilina sp, Melongena sp. Index of unity about 0,6689, Index dominansi about 0,2264 and Index suitability about 0,4156 Keyword: Gastropoda, Mangrove, Old Amal Beach

HUBUNGAN KERAPATAN MANGROVE DENGAN KELIMPAHAN GASTROPODA DI KAWASAN KONSERVASI MANGROVE DAN BEKANTAN (KKMB) KOTA TARAKAN Gazali, Salim; Rachmawani, Dori; Agustianisa, Rahmah
Jurnal Harpodon Borneo Vol 12, No 1 (2019): VOLUME 12 NO. 1 APRIL 2019
Publisher : Jurnal Harpodon Borneo

Mangrove forests are one of the natural ecosystems that make a large contribution to the population as a food source, one of which is gastropods. The purpose of this study was to determine the density of mangroves, the abundance of gastropods and the discussion between the density of mangroves and the abundance of gastropods. This research was carried out in September - November 2018 in the area of 12 ha KKMB. The research method used was a survey method by conducting direct research on 12 plot points with a plot size of 10 x 10 meters were in each plot there were 3 sub-plots made 1 x 1 meter randomly carried out in the plot to take gastropod samples. The collected data are grouped by type variable, mangrove density as a variable (X) and gastropod abundance as a variable (Y). The results showed that the mangrove yields in the area obtained by KKMB belonged to the very solid (good) category with a value of 11.700 ind / ha. The highest gastropod abundance is dominated by the type of Cassidula aurisfelis with the number of 79 individuals and the lowest abundance of the type Littoraria scabra with the number of 14 individuals . The low level of gastropod abundance is reduced due to the low density of mangrove species and the low food source in the mangrove area. The relationship of mangrove density with gastropod abundance using simple linear regression analysis obtained the value of determination coefficient (R2) of 0.227, while the coefficient value was 0.4766 which means that it is positively correlated.

ANALISIS MODEL SIFAT PERTUMBUHAN DAN INDEKS KONDISI KEPITING BAKAU (Scylla serrata) YANG BERASAL DARI PERAIRAN ESTUARIA KOTA TARAKAN Salim, Gazali; Rachmawani, Dori; Septian, Doddy
Jurnal Borneo Saintek Vol 1, No 3 (2018)
Publisher : LPPM Universitas Borneo Tarakan

Tarakan memiliki potensi yang cukup tinggi pada sumberdaya hayati salah satunya adalah kepiting bakau (Scylla cerrata). Tujuan penelitian yaitu untuk menganalisis model pertumbuhan allometri dan indeks kondisi serta rasio kelamin dari kepiting bakau (S.serrata) yang berasal dari perairan Estuaria disekitar kota Tarakan. Metode penelitian Penelitian ini menggunakan metode penelitian deskriptif dengan pendekatan kuantitatif. Pengambilan sampel kepiting bakau (S.serrate) bersifat purposive sampling dengan mengikuti nelayan yang biasa menangkap kepiting S.serrate di habitatnya. Pengambilan sampel dilakukan sebanyak 2 periode yaitu saat pasang dan surut dengan menggunakan alat tangkap ambau kurung sebanyak 35 unit beserta umpan ikan belut yang dikeringkan. Hasil Penelitian mengenai model pertumbuhan allometri berdasarkan antara dimensi karapas (panjang, lebar dan tebal karapas) denganb berat total dari kepiting bakau (Scylla serrata) jenis kelamin jantan dan betina memiliki pertumbuhan bersifat allometri negatif. Indeks kondisi antara dimensi cangkang (panjang karapas) dengan berat total untuk jantan dan betina di dominasi bentuk tubuh gemuk sedangkan untuk indeks kondisi antara dimensi cangkang (lebar dan tebal karapas) dengan berat total untuk jantan di dominasi bentuk tubuh kurus dan untuk betina didominasi bentuk tubuh gemuk. Rasio kelamin betina lebih banyak dibandingkan dengan jantan.

ANALISIS KELIMPAHAN POPULASI Telescopium telescopium DI KAWASAN KONSERVASI MANGROVE DAN BEKANTAN KOTA TARAKAN Salim Gazali; Dori Rachmawani; Kristiani Rani Mathius
Jurnal Harpodon Borneo Vol 10, No 2 (2017): Volume 10 No.2 Oktober 2017
Publisher : Fakultas Perikanan Dan Ilmu Kelautan Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/harpodon.v10i2.400

Research objectives is to know abundance of offerings shared with percent of the population T.telescopium in a habitat of those mangrove KKMB the city of Tarakan. The research uses a method of descriptive method. The sample collection be paid out starting on different stations in the regions KKMB and stations 2 in the expansion of KKMB. Each station also carried out 6 plot with the size of 10x10 meters with the methods purposive the sampling method. The sample collection t.telescopium performed on recede lowest and extraction of secondary data of a variable pH, salinitas and at such a temperature (in-situ) and analysis of a sample of sediment. The results of the study abundance T.telescopium is highest in the expansion of the average value of station KKMB 0,102 ind/m2 and on the average value of station KKMB 0,088 ind/m2. Based on analysis substratum research the ground in two stations of different there are different substratum dominant the dust was 48% in KKMB and types of the substrate at the station KKMB down the dust was 51 %. Based on the results of the analysis that pH and the temperature at two stations of different having the value of the average the same situation namely that 7-8 and 27-28oC.The measurement result salinitas in both station average range 28ppt – 30ppt.

Utilization of Trash Fish for Cultivation of Crablet Mud Crab (Scylla serrata) Heppi Iromo; Dori Rachmawani; Abdul Jabarsyah; Zainuddin Zainuddin
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 3 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.25.3.110-114

The high demand for mud crabs in North Kalimantan causes catch to increase in the wild. If it is not balanced with efforts to increase its aquaculture of mud crab, in the future there will be a decline in population. This study aims to determine the growth and survival rate of mud crab seed (crablet, Scylla serrata) in the application method of different types of trash fish. This research used a completely randomized design with 4 treatments and 3 replications. The Crablet used carapace width average 0.07-0.09 cm and weigh average 0.05-0.07 g with total 150 crablets. The treatments applied by trash fish were (A) Tilapia Fish (Oreochromis mossambicus), (B) Longfin Herrings Fish (Ilisha elongata), (C) Sword Fish (Trichiurus lepturus) and (D) Snails (Telescopium telescopium). The results were The best weight growth of crablet occurs in the treatment of T. lepturus (P>0.05) and the highest of survival rates of crablet were found in treatment T. telescopium (P<0.05) than the other. The trash fish were used turned out to be able survival of crablet mud crab (Scylla serrata).

Limbah Cangkang Kerang Temberungun (Telescopium telescopium) Sebagai Adsorben Logam Berat Besi (Fe2+) Tri Paus Hasiholan Hutapea; Ayu Paramitha; Dori Rachmawani
Jurnal Sumberdaya Akuatik Indopasifik Vol 3 No 2 (2019): November
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Papua

The decrease in water quality is caused by the presence of pollutants in the form of organic and inorganic components. Inorganic components, including heavy metals, one of which is iron (Fe). Adsorption is one of the technologies that can be used to absorb heavy metals where the adsorbent used in this study is a shell of a shell (Telescopium telescopium) to absorb iron (Fe2+). This research aims to utilize the waste of the mussel shells (Telescopium telescopium) as an adsorbent for heavy metal iron (Fe2+). The study was divided into three stages, namely the adsorbent surface characterization, determining the optimum time and determining the adsorption capacity. All stages of the study were carried out on adsorbents that were not activated and NaOH. The results showed the largest pore size after activation was 1,398 µm, while the adsorbent before activation, the largest pore size was 844.8 nm. The surface acidity of the adsorbent before activation is 5.28 mmol / g and after activation has a value of 6.74 mmol / g. The optimum time of absorption of ferrous metal ions (Fe2+) before and after activation is 60 and 30 minutes. The adsorption capacity of the adsorbents before and after activation was 11,07899 mg / g and 459,3038 mg / g, respectively. It was concluded that the shell of a temberungun shell (Telescopium telescopium) can be used as an adsorbent for heavy metal ions (Fe2+)

ANALISIS MODEL SIFAT PERTUMBUHAN DAN INDEKS KONDISI KEPITING BAKAU (Scylla serrata) YANG BERASAL DARI PERAIRAN ESTUARIA KOTA TARAKAN Gazali Salim; Dori Rachmawani; Doddy Septian
Jurnal Borneo Saintek Vol 1, No 3 (2018)
Publisher : Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/borneo_saintek.v1i3.929

Tarakan memiliki potensi yang cukup tinggi pada sumberdaya hayati salah satunya adalah kepiting bakau (Scylla cerrata). Tujuan penelitian yaitu untuk menganalisis model pertumbuhan allometri dan indeks kondisi serta rasio kelamin dari kepiting bakau (S.serrata) yang berasal dari perairan Estuaria disekitar kota Tarakan. Metode penelitian Penelitian ini menggunakan metode penelitian deskriptif dengan pendekatan kuantitatif. Pengambilan sampel kepiting bakau (S.serrate) bersifat purposive sampling dengan mengikuti nelayan yang biasa menangkap kepiting S.serrate di habitatnya. Pengambilan sampel dilakukan sebanyak 2 periode yaitu saat pasang dan surut dengan menggunakan alat tangkap ambau kurung sebanyak 35 unit beserta umpan ikan belut yang dikeringkan. Hasil Penelitian mengenai model pertumbuhan allometri berdasarkan antara dimensi karapas (panjang, lebar dan tebal karapas) denganb berat total dari kepiting bakau (Scylla serrata) jenis kelamin jantan dan betina memiliki pertumbuhan bersifat allometri negatif. Indeks kondisi antara dimensi cangkang (panjang karapas) dengan berat total untuk jantan dan betina di dominasi bentuk tubuh gemuk sedangkan untuk indeks kondisi antara dimensi cangkang (lebar dan tebal karapas) dengan berat total untuk jantan di dominasi bentuk tubuh kurus dan untuk betina didominasi bentuk tubuh gemuk. Rasio kelamin betina lebih banyak dibandingkan dengan jantan.

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