Judul: Eutrophication of Two Sand Pit lake in Cikahuripan Village Cianjur
Abstrak: Sandpit lake is an artificial water bodies with small size filled with water because it has penetrated the underground water channels. As a new water body it has the potential to be exploited but without proper management, the usability of this sandpit lake can be short due to eutrophication process. The aims of this research were to describe eutrophication level and to analysis the trophic status of two sandpit lake in Cikahuripan Village wich is Situ no 5 and Situ no 6. The methodology of this research is descriptive analysis with sampling in Mei and July 2010. TRIX calculation results show the trophic status of both sandpit lake has been eutrofik that indicates eutrophication processes take place very quickly. This is supported by the parameters of physics, chemistry and biology both sandpit lake that characterized by high nutrients and productivity as well as the lack of brightness. Although there were observed that sandpit lake is still relatively new waters, but based on trophic status indicates eutrophication process has been going very quickly as a result of anthropogenic activities
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Judul: Trophic States of Situ Patenggang, Bandung Regency, West Java
Abstrak: Situ Patenggang is managed as a recreation area in the form of Natural Tourism Park. Human activities around it can provide organic and inorganic materials which cause changes in lake’s trophic states. Utilization potential of water bodies can be measured by trophic state level that consider the presence of nutrients and phytoplankton. This study aims to determine the trophic states of Situ Patenggang, Bandung Regency, West Java. Sampling of water and phytoplankton were conducted at Situ Patenggang with four observation stations for three times of collections. Trophic index (TRIX) approach is used to analyzed the trophic state of Situ Patenggang. Concentration of total phosphate ranged from 0.20 – 0.64 mg/L. Dissolved inorganic nitrogen concentration ranged from 0.20 – 0.64 mg/L. Chlorophyll-a concentration ranged from 10.08 – 33.83 µg/L. Trophic states of Situ Patenggang is classified as eutrophic waters with values ranging from 4.25-6.54 according to the TRIX approach. These information can be used to anticipate trophic level increase for sustainable utilization of Situ Patenggang’s ecosystem., Situ Patenggang dikelola sebagai tempat rekreasi berupa Taman Wisata Alam Situ Patenggang. Aktivitas masyarakat di sekitar perairan dapat memberikan masukan bahan organik dan anorganik yang berpotensi meningkatkan kesuburan perairan. Tingkat kesuburan perairan erat kaitanya dengan potensi pemanfaatan perairan yang ditinjau dari keberadaan unsur hara dan kelimpahan fitoplankton. Penelitian ini bertujuan menentukan status kesuburan perairan Situ Patenggang, Kabupaten Bandung, Jawa Barat. Pengambilan contoh air dan fitoplankton dilakukan pada empat stasiun pengamatan selama tiga kali waktu pengambilan. Status kesuburan perairan dianalisis menggunakan pendekatan trophic index (TRIX). Konsentrasi fosfat total berkisar antara 0,04 – 0,19 mg/L. Konsentrasi nitrogen anorganik terlarut berkisar antara 0,20 – 0,64 mg/L. Konsentrasi klorofil-a berkisar antara 10,08 – 33,83 µg/L. Status kesuburan perairan Situ Patenggang berdasarkan pendekatan TRIX secara umum tergolong ke dalam perairan eutrofik dengan nilai berkisar antara 4,25 – 6,54. Hasil penelitian ini dapat digunakan sebagai informasi pendukung bagi pengelola dalam mengantisipasi terjadinya peningkatan status kesuburan perairan guna pemanfaatan perairan Situ Patenggang yang lebih optimal dan berkelanjutan.
Keyword: eutrophic, phytoplankton, nutrients, trophic states, TRIX

Judul: Respon Antibodi pada Ayam Broiler yang Divaksinasi Vaksin Rekombinan Infectious Bursal Disease (IBD).
Abstrak: Penelitian ini dilakukan untuk mengevaluasi durasi antibodi asal induk terhadap Avian Influenza (AI) dan mengevaluasi respon antibodi Infectious Bursal Disease (IBD) pada ayam broiler yang divaksinasi dengan vaksin IBD rekombinan. Penelitian ini meggunakan dua kelompok ayam broiler: kelompok divaksinasi dan kelompok kontrol. Kelompok yang divaksinasi menerima vaksinasi herpesvirus of turkey (HVT)-IBD pada usia satu hari dan kelompok kontrol tidak divaksinasi apapun. Sampel serum diambil pada hari ke 3, 6, 9, 12, 15, 19, 22, 26, 29, dan 33. Keberadaan antibodi AI ditentukan dengan uji inhibisi hemaglutinasi (HI), sedangkan keberadaan antibodi IBD ditentukan dengan enzyme linked immunosorbent assay (ELISA). Antibodi AI asal induk pada kedua kelompok terdeteksi dari hari ke 3 hingga hari ke 29, tetapi titer antibodi berada di bawah level protektif 24. Antibodi IBD pada kelompok kontrol, positif dari hari ketiga hingga 33, tetapi rataan titer antibodi turun pada level terendah pada usia 15 hari. Titer antibodi IBD pada kelompok yang divaksinasi positif sampai usia 33 hari. Penelitian ini menunjukkan bahwa keberadaan antibodi AI asal induk tidak dipengaruhi oleh vaksinasi HVT-IBD, dan keberadaan antibodi IBD asal induk tidak memengaruhi keberhasilan vaksinasi HVT-IBD.
Keyword: antibodi, ayam broiler, Avian Influenza, Infectious Bursal Disease, HVT-IBD