vv International Journal of Aquaculture and Fishery Sciences ISSN: 2455-8400 CC By 013 Life Sciences Group Citation: Sumiarsih E, Eddiwan K (2018) Otolith Growth Pattern of Puntius Schwanenfeldii from the Koto Panjang Reservoir, Regency of Kampar, Riau, Indonesia. Int J Aquac Fish Sci 4(2): 013-017. DOI: http://doi.org/10.17352/2455-8400.000037 http://doi.org/10.17352/2455-8400.000037 DOI an Abstract Koto Panjang Reservoir is the largest reservoir in Riau Province, there are many efforts of floating net cage (KJA) by using feed (pellet) continuously. As a result of many feeds that settle in the bottom of the waters because it is not consumed by the fish. The purpose of this research is to know the pattern of growth circle otolith of kapiek fish that live around KJA and in waters that there is no KJA (natural). The study was conducted from March to September 2016. This study used survey method, with 5 stations, where St1 and St 2 were in waters without KJA, while St3, St4 and St5 were in the waters around KJA. Taking, grinding and observing the growth circle pattern on otolith cucumber fish were conducted based on the Windarti method (2007). The result of the research shows that there is a difference of growth circle pattern on otolith of kapiek fish between the two public waters. Kapiek fish that live freely around KJA does not have dark circles on its otolith, while kapiek fish in waters without KJA have dark circles on its otolith. Thus the presence of food waste from KJA may affect the growth pattern of kapiek fish in Koto Panjang Reservoir shown in the growth circle pattern in its otolith. Research Article Otolith Growth Pattern of Puntius Schwanenfeldii from the Koto Panjang Reservoir, Regency of Kampar, Riau, Indonesia Eni Sumiarsih and Kamaruddin Eddiwan* Faculty of Fishery and Marine, Riau University, Campus Binawidya JL HR Soebrantas KM 12.5 Charming, Pekanbaru City, Riau Province, Indonesia Received: 29 March, 2018 Accepted: 21 May, 2018 Published: 22 May, 2018 *Corresponding author: Kamaruddin Eddiwan, Fac- ulty of Fishery and Marine, Riau University, Campus Binawidya JL HR Soebrantas KM 12.5 Charming, Pekanbaru City, Riau Province, Indonesia. E-mail: Keywords: Fish cage; Floating net; Otolith; P. Schwa- nafeldii; Koto panjang reservoir https://www.peertechz.com Introduction Koto Panjang Reservoir is the largest reservoir in Riau Province and functioned as a power plant for the province of Riau. But now these reservoirs have been used as tourist attractions, fishing activities and fish cultivation with floating net cage system (KJA). Most KJA entrepreneurs apply a “semi- intensive” system, which maintains fish in KJA with relatively high stocking density and provides a diet rich in fat and protein to support fish growth [1-3]. The existence of KJA in Koto Panjang Reservoir attracts wild fish to come and approach, such as kapiek fish (Puntius schwanenfeldii), barau fish (Hampala bimaculata), persuasion (Channa lucius), fish katung (Pristolepis grotii), fish Belida (Notopterus chilata) and others [4,5]. The most common fish is kapiek fish. According to [6-8], food scraps that come out of the fish cages attract fish to come around the fish cages, or the food is as an attractant to wild fish outside the fish cages. Furthermore, [9] stated that the existence of various types of fish around the fish cages is related to the effort to find food, although the food of the fish is different. Among the species of fish caught in the Koto Panjang Reservoir, the kapiek fish whose diets change, from debris eaters to fish-eating pellets [10]. This shows that only kapiek fish are opportunistic fish [11]. An opportunistic fish is a fish that takes the opportunity to utilize food whenever it is available [10]. Fish that are opportunistic are also able to change the behaviour of foraging behaviour according to the availability of food in which the fish live (Anonymous, 2013). So the existence of fish cages can affect the growth of kapiek fish. The environmental conditions and availability of kapiek fish food resources are an important factor in the availability of kapiek fish stock in nature [12-14] states that if the living environment of fish is still adequate, where the availability of food and environmental conditions support the fish’s life, the fish grows rapidly so that the calcium carbonate (CaCO¬3) structure accumulated in the bone, as well as otolith, is relatively tenuous. Conversely, if environmental conditions are less supportive of fish life, for example, due to pollution or changes in extreme waters conditions, the fish will experience pressure/stress so that the growth of fish becomes disturbed/ obstructed [15]. As a result of this slow growth, the structure of CaCO3 accumulated in otolith is formed relatively dense. The loose structure of CaCO3 appears as a light/thin growth circle, while the solid CaCO3 structure appears as a dark/thick growth circle [16,17].