Abstract. Bahtiar, Purnama MF, Kasim M, Ishak E. 2022. Population dynamics of blood clams Tegillarca granosa in Kendari Bay, Southeast Sulawesi, Indonesia. Biodiversitas 23: 5084-5092. Blood clams (Tegillarca granosa) are bivalves found in the intertidal areas of ??Kendari Bay which are subjected to ecological stresses. Therefore, this study aims to determine the population dynamics of blood clams in Kendari Bay, Southeast Sulawesi, in terms of their size structure, growth, mortality, and exploitation level from March 2018-February 2019. The samples were collected with scoop nets in ten 5x5 m2 transects. Water quality parameters were monitored every sampling period. The length of the shells was measured using a caliper with an accuracy of 0.05 mm. The data were processed using the Bhattacharya method, inverse von Bertalanffy model, length-converted catch curve, and Pauly's empirical data, respectively. All of the methods were accommodated in the FiSAT II version 3.0 program. Results showed that the blood clams were divided into 2-3 size categories, namely young adult, adult, and old age, where the most dominant was the adult size group. The growth pattern of the samples was based on the equation Lt = [6.67-(6.67-0.025)] e-0.72t. The majority of the blood clams were distributed in the 1-2 years age group. Natural, fishing and total mortalities (Z) of the blood clams were 2.18 yr-1, 0.29yr-1, and 3.09yr-1, respectively, with an exploitation rate (E) of 0.29 (underexploited).
Processing of target species do not optimal, especially the processing of the by-catch product. This is caused by the weak capacity of the fishing groups, particularly in the utilization of marine products in the dry season and the acquisition of market information, so it requires increased knowledge and transferal appropriate technology. Purpose of the study: (1) generate a group of fishermen who are skilled, creative and innovative in the processing of marine products; (2) create a group of fishermen who are good entrepreneurs with venture capital is cheap, affordable and sustainable; (3) make the fishing village groups as independent business pioneer advanced and community known as a producer and marketer of processed fish products as one of the typical souvenir of Kendari. Method of determining the sample was done by purposive sampling. This activity involves two groups of partners consisting of fishermen processors groups and fishermen fishing groups each of 20 people. The data were analyzed descriptively of the results of the implementation of the two activities, namely non-physical activities (socialization and education) and physical activity (manufacture plots hygienic drying fish and puffer fish burger-making). Action research results make a positive contribution to the strengthening of the capacity of a group of fishermen in the economic, scientific, cultural and social skills. Another positive contribution is opening insights and ways of thinking to make use of by-catch product into marketable products and process raw materials of marine fish with a hygienic manner that supports the improvement of the quality of the product to be accepted in the market, and create jobs in the village with the ability of a group of fishermen in entrepreneurship independent, which in turn can improve the economics of fishing households and assist the government in the construction of coastal villages.
AbstrakKeong mas atau dalam bahasa daerah Sulawesi (Kabupaten Konawe) disebut sebagai "Keong kowoe" banyak dimanfaatkan masyarakat sebagai makanan. Keong ini dipercaya memiliki banyak khasiat dan manfaat, antara lain kandungan antioksidan yang tinggi. Penelitian ini bertujuan menentukan pelarut yang terbaik untuk mengekstrak komponen bioaktif keong mas dan menentukan kandungan antioksidannya. Penelitian ini meliputi analisis proksimat, uji kuantitatif aktivitas antioksidan dengan metode DPPH. Hasil pengukuran morfometrik menunjukkan rendemen daging sebesar 11,86%. Kandungan proksimat daging segar tertinggi pada kadar air sebesar 65,79%, protein 18,14%, abu 10,49%, karbohidrat 4,14% dan lemak 3,44%, sedangkan pada daging kering kadar air sebesar 40,04%, protein 38,06%, karbohidrat 10,66%, abu 8,53% dan lemak 2,70%. Hasil pengamatan didapatkan rendemen hasil ekstraksi senyawa aktif menggunakan pelarut kloroform (non polar) sebesar 1,78%, etil asetat (semi polar) 3,41% dan metanol 6,63% (polar). Rendemen yang tinggi pada pelarut metanol diduga karena keong kowoe mengandung lebih banyak senyawa aktif yang bersifat polar. Hasil uji aktivitas antioksidan ekstrak kasar jenis pelarut metanol (polar) mempumyai nilai IC 50 yaitu 111,28 ppm, sehingga tergolong sedang.Kata kunci: antioksidan, bioaktif, proksimat, rendemen Abstract Gold snail is called "Kowoe" in Celebes Island. They are widely utilized by people as food. This snail also has many properties and benefits. The aims of this study were to determine the best solvent to extract the bioactive components of snails and measure the antioxidant activity. The proximate analysis was caried out, then quantitative test of antioxidant activity by DPPH method was measured. The results of morphometric measurements showed the meat yield 11.86%. The proximate analysis of fresh meat consisted of water content 65.79%, 18.14% protein, 10.49% ash, 4.14% carbohydrates, and fats 3.44%, while the moisture content of dried meat contained 40/ 04%, 38.06% protein, carbohydrates 10.66%, ash 8.53% and 2.70% fat, respectively. The yield of extraction of the active compound using chloroform (non-polar) was 1.78%, ethyl acetate (semi-polar) was 3.41% and 6.63% methanol (polar). The snails kowoe contain more the polar of active compounds. The antioxidant activity of crude extract in methanol solvent (polar) had IC 50 values 111.28 ppm (moderate).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.