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Community structure of bivalvia and gastropods nearby water vegetation in Sentani Lake, Papua. Line’s transect and plot methods were used to determining the structure of mollusks and vegetation by using index, diversity, and dominance as parameters. Intentional measurement were carried out on several biological parameters of the waters at 10 sampling points. From the observation and measurments, we obtained seven types of mollusk with 5644 individuals, where six types are belong to gastropods and one type is a member of bivalves. The highest level of mollusk diversity was in Kwadeware, the highest at the inlet of the lake, and were dominated by Melanoides tuberculata and Pomacea canaliculata. In addition, vegetation found in the area observation were water hyacinth (Eichhornia crassipes), water spinach (Ipomoea aquatica), apu wood (Pistia stratiotes), genjer (Limnocharis flava), Hydrilla verticillata, seagrass (Potomogeton malainus), Nymphaea alba, Ceratophyllum demersum, and Nymphoides indica.Key words: gastropods; molluscs; vegetation; Sentani lake

Highland Wild Dog (HWD) is Canis hallstromi from Papua that was distributed in Puncak Jaya area and is close to tribal Amungme, Damal, and Moni Kamoro. The aim of the study is to find out the local knowledge of Amungme, Damal, Moni, and Kamoro tribes about the population and behavior of HWD. The research began on the interview, then continued to obeservation using 11 camera traps placed in Gresberg area in Puncak Jaya. Analysis used is interval level values, while for measuring the HWD density and behavioral we used documentation technic. Results of the interview provide various information from each tribe related to morphology, behavior, role, management, and mythology of HWD. Result of this study reveals that the Amungme and Moni tribes have a concept in the preservation of HWD. It could be seen from the habit of people who do not utilised the HWD for hunting. Instead, they prepare a place for nursery even a den for the dogs. All the informations collected from the community is also scientifically proven that HWD is C. hallstromi distributed in Papua, especially subalpine and alpine in Puncak Jaya, estimated population of HWD is ± 200 individuals. Observed behavior of these dogs are howling, rolling, rubbing, and having communal toilet spots. Generally, they have social behavior in groups with the number of 3-5 individuals and usually one of them is a male dog. Key words: Canis hallstromi;Ecology; Ethnoecology; Puncak Jaya.