Judul: Exploration of Parasites Nile Tilapia (Oreochromis niloticus) from The Local Fish Seller in Dramaga, Bogor
Abstrak: Besarnya komoditas perikanan ikan nila secara nasional terus mengalami peningkatan. Namun, dalam usaha budidaya ikan ini berbagai kendala ditemui, salah satunya adalah penyakit yang disebabkan oleh parasit. Penelitian ini bertujuan untuk mengidentifikasi parasit yang ada pada ikan nila (Oreochromis niloticus) dari toko penjual ikan di Dramaga, Bogor, Jawa Barat. Sampel ikan nila diambil sebanyak 14 ekor dengan rata-rata panjang ± 22 cm dan bobot tubuh ± 195 gram. Sampel diambil dari insang, sirip dada, sirip anal, sirip caudal, sirip dorsal, sisik, dan usus ikan. Sampel diperiksa dengan metode natif. Sampel dari usus dilakukan pewarnaan Ziehl Neelsen. Sampel darah ikan diambil untuk dilakukan ulas darah dan diberi pewarnaan Giemsa. Berdasarkan hasil pengamatan, ditemukan parasit Trichodina sp. sebanyak 85,71% (n=14) dengan intensitas 27,83 individu/ekor dan insang sebagai organ yang paling banyak terinfeksi. Tingkat infeksi parasit yang ditemukan dengan pewarnaan Ziehl Neelsen adalah Myxobolus sp. (57,14%), Cryptosporidium spp. (35,71%), dan Cyclospora sp. (14,29%). Sedangkan, tingkat infeksi parasit darah yang ditemukan yaitu Haemogregarina sp. (50%). Informasi mengenai keberadaan parasit pada ikan nila ini menjadi sangat penting diketahui bagi pembudidaya untuk mengendalikan parasit secara tepat dan efektif., The demand for tilapia fishing goods has recently expanded on a national scale. One of the difficulties this fish farming operation encountered was the parasite-caused illness. The aims of this study were to explore parasites in tilapia (Oreochromis niloticus) from the local fish seller in Dramaga, Bogor, West Java. A total of 14 tilapia were sampled, with an average length of 22 cm and a body weight of 195 grams. Fish gills, pectoral fins, caudal fins, tail fins, dorsal fins, scales, and intestines were collected. The methods used in this study were wet mount examination, gut samples were stained with Ziehl Neelsen, and blood samples from fish were obtained and stained with Giemsa for analysis. The findings revealed that Trichodina sp. (85.71 percent) was present in several organs, with the gills being the most heavily affected organ. The intensity of this parasite was 27.83 individuals/head. The parasites detected by Ziehl Neelsen staining were Myxobolus sp. (57.14 %), Cryptosporidium spp. (35.71 %), and Cyclospora sp. (14.29%). The type of blood parasite found was identified as Hemogregarina sp (50%). Our findings are very important information for initiating the development of a treatment strategy to prevent parasite infection in tilapia fish farms.
Keyword: Oreochromis niloticus, parasit darah, parasit saluran pencernaan, tingkat infeksi

Judul: Identifikasi Bakteri dan Cacing Parasitik pada Insang dan Saluran Pencernaan Ikan Nila Hitam (Oreochromis niloticus)
Abstrak: The objectives of this research were to identify parasitic worms and bacteria in gills and digestive tract of nile tilapia (Oreochromis niloticus). A group of 10 fishes of nile tilapia were used, each gills and digestive tract was collected. The parasitic worms were colored with KOH and clove oil for semi-permanent staining, and Semichon’s Acetocarmine for permanent staining. The isolated bacteria were identified using Gram staining, Triple Sugar Iron Agar, citrate agar, urea agar, indole, and cabohydrate fermentations. The result showed that there were three kind of parasitic worms in gills of nile tilapia, Dactylogyridae, Dactylogyrus sp., and Pseudodactylogyrus sp. The total amount of Dactylogyridae is 8 worms, Dactylogyrus sp. is 72 worms, and Pseudodactylogyrus is 24 worms. The bacteria were identified and the result showed that Aeromonas sp., Bacillus sp., Escherichia coli, Edwardsiella tarda, Klbesiella pneumoniae, Pasteurella sp., Staphylococcus epidermidis, and Vibrio parahaemolyticus were come from gills. Aeromonas sp., Bacillus sp., Escherichia coli, Enterobacter aerogenes, Klebsiella pneumoniae, Staphylococcus aerus, Staphylococcus epidermidis, Streptococcus sp., and Vibrio parahaemolyticus were come from digestive tract. The relation between the parasitic worms and the bacteria did not significanty obvious. The parasitic worms might predispose the secondary infection caused by bacteria or might be the opposite.
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Judul: Pelabelan Super Edge Magic pada Graf Cycle dan Graf Wheel
Abstrak: This manuscript proves that cycle graph and wheel graph have a super edge magic labeling. Super edge magic labeling on a graph is labeling that has an edge magic labeling with a set of vertices were mapped in to {1,2,… ,𝑝} and a set of edges were mapped in to {𝑝+1,𝑝+2,… ,𝑝+𝑞}, in which 𝑝 is order and 𝑞 is size on the graph. There are one lemma and two theorems to be discussed. The lemma is used to prove the two theorems. The first theorem proves that cycle graph 𝐶𝑛 is super edge magic if and only if 𝑛 is odd. The second theorem proves that wheel graph 𝑊𝑛 of order 𝑛 is not super edge magic. Moreover 𝑊𝑛 is not edge magic if 𝑛≡0 mod
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