Judul: Sebaran Spasial dan Karakteristik Habitat Buaya Air Tawar Irian (Crocodylus novaeguineae Schmidt,1928) di Taman Nasional Wasur
Abstrak: Rawa BIRU lake is the biggest lake in Wasur National Park (WNP) and it is a habitat for Irian freshwater Crocodile (Crocodylus novaeguineae). Now adays, their population become decreasing and it caused by hunting, a less data about their habitat and not enough knowledge about their dispersion in every parts of the lake. If this condition still happened, the existence of Irian freshwater Crocodile will threatened and more over they will be extinct so for prevent this situation we need management action. therefore it needs a study about habitat characteristic of Irian freshwater Crocodile and their dispersion in every parts of the lake as a referention and consideration for the next management action. The research was conducted in Rawa Biru lake, SPTN III Wasur, WNP, Merauke, Province of Papua, during April-May 2008 (Rainy season). This research is based on exploration method and taking samples for habitat, which is consist of cover, water and foods potential. Data of spatial dispersion using transect method and GPS (Global Positioning System) through around the edge of the lake. Besides, data of traditional knowledge, habitat disturbance and management using observation and interview methods. Irian freshwater Crocodile use vegetations like tebu rawa (Hanguana malayana) and rumput pisau (Pandanus sp) around the lake as a place to nesting, basking, covering and searching the foods. The nest have a shape like a mound, it was made from leaf manures of tebu rawa and rumput pisau, leaves and branches of pulai (Alstonia scholaris) and branches of Sagu (Metroxylon sagu) with length about 1,8-2,1 meters, width 2,1 meters and height about 60-75 centimeters, it lies under the stand. There also find a little mudhole and resting place of female crocodile closed by the nest. The breadth of basking place was influenced by body size, number of individual and utilizing intensity. In upper part zone of Rawa Biru lake (North side of the lake/kali mati) was found 4 crocodile, nesting and active basking places. Upper part zone is far from the village and it still far from human disturbance. One of the most common food of crocodile is sembilang fish. Middle part zone of the lake get a disturbance from human in the form of calladium plantation (Thyponium sp) upon roots of tebu rawa and rumput pisau, heavy traffic of boat also disturbance from human. It was found 1 mujahir fish and 3 long-neck turtle as crocodile's foods. In the lower course zone (South side of the lake/people called it was head of the lake) does not find any foot print or track of crocodile, it caused by lower course have the near distance from the village and it already get disturbance from human like back and forth of the boat and often using as a place to searching fish and along tome ago it was used as place to crocodile hunting. Irian freshwater Crocodile using Rawa Biru lake and vegetation under it as a places to nesting, basking, covering and searching their foods. Dispersion of their nesting and basking places in every zone of Rawa Biru lake was influenced by human disturbance
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Judul: Keberhasilan Penangkaran Buaya Muara Crocodylus Porosus Schneider, 1801 Dengan Pola Pembesaran: Studi Kasus Penangkaran Buaya Di Provinsi Papua
Abstrak: Estuarine crocodile in Indonesia was included in the category of Appendix II of CITES, thus its utilization and trade must be as speciments from captive units. Captive with ranching scheme was allowed only in Papua province and had occured for ± 15 years. Unfortunately, the recent condition showed a decreasing of ranching units and the number of crocodiles ranched. These can become a threat to the wild population in form of direct harvesting from the crocodile’s natural habitat. Technical activity was needed to assure that the ranching products was adequate in term of enlargement period and economic cutting size, of which the data was not yet available. This research was aimed to (1) describe the mastery of knowledge and technology practice within the management of estuarine crocodile at a captive unit, (2) measure the success rat of the captive and (3) identify the support from stakeholders for the success and sustainability of this ranching scheme captivity. The research took place in February – July 2012 at CV. Bintang Mas in Jayapura. The methods used for collecting data were observation, interview and literature study, also using descriptive analysis to analyze the data. The result showed that the knowledge mastery was at medium rate, though technically the captive unit were able to apply most of captive main activities. Mortality rate of juveniles during the enlargement period (4-5 years) was at the medium level (10-30%). The limitating factor for developing the captive unit was the human resource which was not yet reconciled with the availability of infrastucture. Success index assessment within the biology and technical criteria resulted a number of 0.622 which suggested that this captive unit had a fine category (62.2%), and was considered succesful and be allowed to utilize its product. As to increase the success and sustainability of estuarine crocodile captive unit with ranching scheme, the support from stakeholders in form of actions (cooperation, knowledge enhancement and conservation awareness) and expectation towards the improvement of management form and sustainable use were definitely needed.
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Judul: Katalis Zink Ferit Tersubstitusi Cu untuk Oksidasi Benzil Alkohol
Abstrak: Katalis berperan dalam menurunkan energi aktivasi. Katalis ZnFe2O4 dan ZnFe2O4 tersubstitusi Cu disintesis menggunakan metode kopresipitasi untuk digunakan dalam oksidasi benzil alkohol. Katalis dicirikan dengan spektrofotometer inframerah (FTIR) dan difraktometer sinar-X. Spektrum FTIR menunjukkan puncak serapan dari ikatan Zn-O dan Fe-O masing-masing pada rentang 559‒575 cm-1 dan 419‒447 cm-1. Difraktogram menunjukkan terbentuknya fase tunggal Zn0.6Cu0.4Fe2O4 pada katalis ZnFe2O4 tersubstitusi Cu 20%. Benzil alkohol dioksidasi dengan sistem refluks. Konversi benzil alkohol meningkat dengan meningkatnya suhu. Kadar benzaldehida yang dihasilkan dengan katalis ZnFe2O4 tersubstitusi Cu 20% lebih tinggi dibandingkan dengan katalis ZnFe2O4 yang tidak tersubstitusi dan yang tersubstitusi Cu 60 dan 80%. Hal tersebut menunjukkan bahwa katalis ZnFe2O4 tersubstitusi Cu 20% memiliki kinerja yang lebih baik dalam oksidasi benzil alkohol menjadi benzaldehida dengan kadar benzaldehida 8.763%.
Keyword: Benzil alkohol, katalis, oksidasi, ZnFe2O4