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Djumanto Djumanto
Maria Intan P. Devi
Eko Setyobudi


Opak River, a river upstream on the slopes of Merapi Mount and empties into Indian Ocean, has a diverse aquatic biotic such as fishes. The aim of this study was to determine the species, abundance, and distribution of fishes in the downstream region of Opak River in Yogyakarta. The length of Opak River was approximately 60 km, the length in upper and downstream region around 30 km each. There were five sampling stations, and the station 1 was located in 5 km away from the river mouth, then followed by station 2 until 5, with the distance between stations around of 4-6 km. Fish sampling was conducted every week from May to June 2012 with six replicates, using electrofishing operated by local fishermen. The result showed that there were 2295 individuals of fishes comprising of 7 orders, 23 families, 30 genera, and 35 species. Of them, there were 26 freshwater species, 5 estuarine species, 3 marine species, and 1 catadromous species. Estuarine and marine species could penetrate into freshwater as far as about 10 km and 5 km from the river mouth, respectively. The most abundant family was Cyprinidae, and the highest individual abundance was Barbonymus sp., followed by Puntius binotatus and Rasbora argyrotaenia. The length distribution among fishes ranged between 2.2 and 36.0 cm, with an average of 9.12 cm. The shortest fish was Sicyopterus longifilis, while the longest was Anguilla marmorata. The weight distribution among fishes ranged from 0.07 to 505.0 g, with an average of 14.9 g.


Sungai Opak yang berhulu di lereng Gunung Merapi dan bermuara di Samudera Hindia, memiliki biota air yang bera-gam jenis, misalnya ikan. Tujuan penelitian ini adalah untuk menyajikan informasi spesies, kelimpahan, dan distribusi ikan di wilayah hilir Sungai Opak di Yogyakarta. Panjang Sungai Opak sekitar 60 km, panjang di wilayah hulu dan hilir masing-masing sekitar 30 km. Pengambilan contoh ditetapkan sebanyak lima stasiun yang dimulai dari muara, yaitu stasiun 1 terletak 5 km dari muara sungai, kemudian diikuti oleh stasiun 2 sampai 5, dengan jarak antar stasiun sekitar 4-6 km . Pengambilan contoh ikan dilakukan setiap minggu dari Mei hingga Juni 2012 dengan enam ulangan, menggu-nakan alat kejut yang dioperasikan oleh nelayan setempat. Hasil penelitian menunjukkan bahwa jumlah ikan hasil tangkapan diperoleh sebanyak 2295 individu yang berasal dari 7 ordo, 23 famili, 30 genera, dan 35 spesies. Berdasar-kan habitatnya, ada sebanyak 26 spesies air tawar, 5 spesies air payau, 3 spesies air asin , dan 1 spesies katadromus. Spesies ikan air payau mampu bergerak masuk ke sungai yang tawar sejauh 10 km dari muara, sedangkan spesies ikan air asin bergerak sejauh 5 km dari muara. Famili yang memiliki kelimpahan spesies paling banyak adalah Cyprinidae dan kelimpahan individu tertinggi adalah Barbonymus sp. kemudian diikuti oleh Puntius binotatus dan Rasbora argyrotaenia. Distribusi panjang ikan berkisar antara 2,2 dan 36,0 cm, dengan rata-rata 9,12 cm. Ikan terpendek adalah Sicyopterus longifilis, sedangkan terpanjang adalah Anguilla marmorata. Distribusi bobot individu ikan berkisar 0,7505,0 g , dengan rata-rata 14,9 g.

abundance; biodiversity; fishes; freshwater; Java.;

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Allan JD, Erickson DL, Fay J. 1997. The influence of catchment land use on stream integrity across multiple scales. Freshwater Biology, 37(1):149-161.

Baker CF, Montgomery JC. 2001. Sensory deficits induced by cadmium in banded kokopu, Galaxias fasciatus, juveniles. Environmental Biology of Fishes, 62(4):455-464.

Cowx IG. 2004. The role of catchment scale environmental management in freshwater fish conservation. Fisheries Management and Ecology, 11(4):303-312.

Dudgeon D, Arthington AH, Gessner MO, Kawabata Z, Knowler DJ, Le vesque C, Naiman R, Prieur-Richard J, Soto D, Stiassny MLJ, Sullivan CA. 2005. Freshwater biodiversity: importance, threats, status and conservation challenges. Biological Reviews, 81(2): 163-182.

Djumanto, Setyobudi E, Sentosa AA, Budi R, Nirwati C. 2008. Reproductive biology of the yellow rasbora (Rasbora lateristriata) inhabitat of the Ngrancah River, Kulon Progo Regency. Jurnal Perikanan, 10(2): 261-275.

Djumanto, Probosunu N. 2011. Biodiversity of fisheries resources in Opak River. Jurnal Iktiologi Indonesia, 11(1): 1-10. (In Indonesia)

Hughes RM, Kaufmann PR, Herlihy AT, Intelmann SS, Cobett SC, Arbogast MC, Hjort RC. 2002. Electrofishing distance needed to estimate fish species richness in Raftable Oregon Rivers. North American Journal of Fisheries Management 22: 12291240.

Jowett IG, Richardson J, Bonnett M L. 2005. Relationship between flow regime and fish abundances in a gravel-bed river, New Zealand. Journal of Fish Biology, 66(5):1419-1436.

Kottelat M, Whitten AJ, Kartikasari SN, Wiijoatmodjo S. 1993. Freshwater fishes of Western Indonesia and Sulawesi. Periplus-EMDI, Hongkong. 221 p.

Maitland P. 1995. The conservation of freshwater fish: past and present experience. Biological Conservation, 72(2):259-270.

Miller RR, Williams JD, Williams JE. 1989. Extinctions of North American fishes during the past century. Fisheries, 14(1):22-38.

Nakabo T. 2002. Fishes of Japan with pictorial keys to the species, English edition. Tokai University Press. Tokyo. 1749 p.

Nelson JS. 2006. Fishes of the world. 4th ed. John Wiley and Sons. USA. 596 p.

Phillips BW, Johnston CE. 2004. Fish assemblage recovery and persistence. Ecology of Freshwater Fish, 13(2): 145-153.

Poff LN, Allan D, Bain MB, Karr JR, Prestegaard KL, Richter BD, Sparks RE, Stromberg JC. 1997. The natural flow regime. A paradigm for river conservation and restoration. BioScience, 47(11):769-784.

Quan W, Yong N, Liyan S, Yaqu C. 2009. Composition of fish communities in an intertidal salt marsh creek in the Changjiang River estuary, China. Chinese Journal of Oceanology and Limnology, 27(4):806-815.

Revenga C, Campbell I, Abell R, de Villiers P, Bryer M. 2005. Prospects for monitoring freshwater ecosystems towards the 2010 targets. Philosophical Transactions of the Royal Society B: Biological Sciences, 360(1454):397-413.

Saunders DL, Meeuwig JJ, Vincent ACJ. 2002. Freshwater protected areas: strategies for conservation. Conservation Biology, 16(1): 30-41.

Silvano RAM, do Amaral BD, Oyakawa OT. 2000. Spatial and temporal patterns of diversity and distribution of the Upper Jurua River fish community (Brazilian Amazon). Environmental Biology of Fishes, 57(1):25-35.

Stickney SS. 2005. Aquaculture: an introductory text. CABI Publishing, Oxfordshire, UK. 265 p.

Trijoko, Pranoto. 2006. Species diversity along the Opak River of Yogyakarta Special Region. In Rahardjo MF, Zahid A, Simanjuntak C (editors) Proceeding Seminar National of Fish IV. 293-300. (in Indonesia)

Xenopoulos MA, Lodge DM, Alcamo J, Marker MD, Schuulze K, Van Vuuren DP. 2005. Scenarios of freshwater fish extinctions from climate change and water withdrawal. Global Change Biodiversity, 11(10): 15571564.

Zahid A, Simanjuntak CPH, Rahardjo MF, Sulistiono. 2011. Ichthyofuna ecosystem estuary Mayangan, West Java. Jurnal Iktiologi Indonesia, 11(1):77-85. (in Indonesia)