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Thamrin Thamrin
Riau University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Environmental Science

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Journal : ECOTONE

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Preliminary Research on Longtail Shad Food in Bengkalis Riau Waters Thamrin Thamrin
ECOTONE Vol 2, No 2 (2021)
Publisher : Riau University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ecotone.2.2.p.65-71

Abstract

Longtail Shad are endemic in the waters of Riau and especially in the waters of Bengkalis Regency and have omnivore characteristics, namely eating plants and also from groups of animals. The purpose of this study is whether fish is the best in choosing food depending on the type of food or not. This study uses a survey method, which was conducted in Bengkalis waters from May to June 2019. In this study, it was shown that fish is the best in choosing food depending on the type of food available (selective), so that if the type of animal, in this case, is crustacean and crab. There are a lot of small crabs, then the worst fish eat the group of crustaceans and small crabs. However, if what is available is only from the algae group, the best fish will only eat from the algae group. So that in the stomach of the Longtail Shad are not found both types of food at once
Saprobic Index and Composition of Phytoplankton in the Sungai Jang, Tanjungpinang, Indonesia Tengku Said Razai; Thamrin Thamrin; Nofrizal Nofrizal; Viktor Amrivo; Ramses Ramses; Yusni Ikhwan Siregar; Imam Pangestiansyah Putra; Rika Kurniawan
ECOTONE Vol 1, No 2 (2020)
Publisher : Riau University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ecotone.1.2.p.47-56

Abstract

Environmental pollution that occurs in Tanjungpinang City, cannot be separated from the pollution of the aquatic ecosystem. Water pollution is caused by the presence of waste from residential activities, shops, industry, and other activities that produce waste. Likewise, what happens in the waters of the Sungai Jang, the activities of settlements, shops, industry can cause water pollution in this area, so a study is needed to see the extent of environmental pollution. The indicator used to determine the level of water pollution is by looking at the saprobity index through the phytoplankton community. This research was conducted by dividing the research stations based on differences in activity, namely; station 1 (settlements), station 2 (mangroves), station 3 (shops, industry), station 4 (reclamation). The results showed that the composition of the phytoplankton species found in the waters of the Sungai Jang, Tanjungpinang consisted of 17 species which were classified into 5 divisions. Diatomae types have the most number of species among other divisions, and the most dominating. The dominance of phytoplankton from the class Bacillariophyceae (Diatomae) cannot be separated from the role of nutrients in the water. The average saprobic index value of -0.39 is classified as Moderately Polluted (Meso Saprobik). Pollution that occurs is a result of organic waste from existing activities, causing an increase in nutrients. From the results of measurements in the field, the nutrient content (nitrate and phosphate) in the waters of the Sungai Jang had exceeded the quality standard.
Belida Fish Cultivation (Notopterus notopterus, Pallas 1769) as Swamp Fish which is Nursed with Different Stocking densities Sukendi Sukendi; Thamrin Thamrin; Ridwan Manda Putra; Ade Yulindra
ECOTONE Vol 1, No 1 (2020)
Publisher : Riau University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ecotone.1.1.p.1-10

Abstract

Belida fish (Notopterus notopterus, Pallas 1769) is one of Indonesia's endemic fish which is often found in swamp waters having high economic value. The population of belida fish until now has decreased due to the high fishing activities in nature. To maintain the population of belida fish in order to remain sustainable from nature  is by cultivation activities. One of  important aspect in belida fish culture is the determination of stocking density used. This study aims to determine the optimum stocking densities in the belida fish farming activities. This research was conducted from June to August 2019 in the fish pond of Sungai Paku Village, Kampar Kiri Subdistrict, Riau. The design used was a completely randomized design with 3 levels of treatment and 3 replications. The treatment used in this study was stocking density consisting of 5, 10 and 15 fish / m3. The results showed that the 5 fish / m3 stocking density treatment produced the optimum fish growth with absolute length growth value (11.48 cm), absolute weight growth (48.73 g), daily growth rate (2.83%), survival rate (86 , 7%), fat retention 1.27% and protein retention value 19.83%.
Co-Authors Agung Dhamar Syakti Aras Mulyadi Doni Apdillah Imam Pangestiansyah Putra Mubarak Mubarak Nofrizal Nofrizal Ramses Ramses Razai, Tengku Said Ridwan Manda Putra Rika Kurniawan Rika Kurniawan Sukendi Sukendi Viktor Amrifo Viktor Amrivo Yulindra, Ade Yusni Ikhwan Siregar