Judul: Analisis pengaruh sedimentasi terhadap komunitas karang batu (scleractinia) di perairan Tanjung Pemancingan Kotabaru Kalimantan Selatan
Abstrak: Sedimentation is one of some limiting factors for coral distribution. Tanjung Pemancingan waters Kotabaru influences by sedimentation coming from river, runoff and activity of coal port mining. The aims of this research are to (1) study hard coral coverage, montatily, abuncance and genera colony, (2) study sedimentation rate and characteristic of environment econditions, (3) analyze correlation of the hard coral community follow with of sedimentation rate, (4) analyze distribution between hard coral community follow with of sedimentation rate and enviromental conditions different.
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Judul: Keterkaitan Sedimentasi terhadap Kondisi Ekosistem Terumbu Karang di Perairan Teluk Lampung Provinsi Lampung
Abstrak: Sedimentation is one of the limiting factor for coral distribution through both the suspended and deposited sediment causing the reduce of light penetration and smothering the polip of coral reefs that can lead to coral death. The purpose of this study was to analyze the relationship of sedimentation with conditions of coral reef ecosystem through observing of the sedimentation rate and analyze community of coral reef. The transects were deployed at the three line series perpendicular wuth an interval of 50 m between the line. Each transect was pleaced at every 10 m along the line. Date within the transect were observed using the underwater camera. The images were analyzed by using CPCe software (Coral Point Count with Excel extensions). Sedimentation rate was measured by a sediment trap using PVC pipe with a diameter of 5 cm and 11.5 cm in height and partition (baffles) cover at the top. Sediment traps were mounted on a 12 mm diameter steel poles at a height of 20 cm from the bottom. Sediment traps were deployed for 20 days, then the recovered sediment was dried in an oven at 60 0C for 24 hours. Sedimentation rate varied between the stations with a range of values from 3.09 to 44.29 mg/cm2/day. The lowest rate of sedimentation was found in Station 7, while the highest was found at Station 1. Sedimentation rates are generally grouped into light untill moderate condition, whereas in some Stations (1, 3, and 6) showed heavy sedimentation rates. The high rate of sedimentation at Station 3 was probably due to close to the mouth of the river. Coral cover ranged from 8.75 to 60.85%, generally showing moderate categories. Severe damages were found in Station 1, 3, and 6 with a dominant form of massive coral, while good categories were found at Station 9 which located in a relatively remote area of influence of the river and dominated by foliose and brancing form. There was a strong indication of relationship sedimentation and coral reefs cover this research area.
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Judul: Evaluation of Influenza Antibody Titers in Serum and Egg Yolk of Layers Vaccinated with Influenza Vaccines.
Abstrak: Influenza belongs to the Orthomyxoviridae family which causes upper and lower respiratory tract infection. The aim of this study was to evaluate influenza-A specific antibody titers from serum and egg yolk of hens vaccinated with quadrivalent influenza vaccines. Three Hy-line Brown layers were vaccinated with quadrivalent influenza type A and B inactivated vaccines. Vaccination was carried out three times at a dose of 0.25 ml/chicken via the intramuscular route. The first vaccination was carried out at 24 weeks of age, then boosters were performed at 28 and 32 weeks of age. Serum and egg yolk were collected every week for 20 weeks since the first vaccination. Influenza A H3N2 and H1N1 antibody titers were determined using hemagglutination-inhibition (HI) test and agar-gel-precipitation (AGP) test. Influenza-A H3N2 and H1N1 specific antibodies were detected in both serum and egg yolk from the first to twenty weeks after the initial vaccination. Highest HI geometric mean titer (GMT) of H1N1 antibody reached 26.67 HIU at nine weeks post first vaccination (p.f.v), while H3N2 antibody reached 26 HIU at six weeks p.f.v. Our result showed that influenza antibodies can be produced in layers using quadrivalent vaccines and layer chickens are able to produce equivalent antibody levels for each influenza subtype.
Keyword: antibody, egg yolk, influenza, layer chickens, serum