Open Access Short Research Article

Growth of Goramy (Osphronemus goramy Lac 1801) Monoculture and Polyculture with Nilem (Osteochilus hasselti C.V)

Ayi Yustiati, Esa Jaya Dinata, Herman Hamdani, Ibnu Bangkit

Asian Journal of Fisheries and Aquatic Research, Page 28-35
DOI: 10.9734/ajfar/2021/v14i630313

This research was conducted to determine the optimal density of gorami (Osphronemus goramy Lac 1801) and nilem (Osteochilus hasselti C.V) polyculture with varios nilem density. The research are carried out in the maintenance pool of the Kawungsari Fish Farmers Group, Kertayasa Village, Pangandaran Regency, Indonesia. The research method used is an experimental method with 4 treatments and 4 replications using Completely Randomized Design (CRD). Variation of stocking densities carried out with the ratio of gorami: nilem is 30 : 0 fish m2 -1 (control), 30:10 fish m2 -1, 30: 20 fish m2 -1 and 30: 30 fish m2 -1. The fish are kept for 40 days in a pond with an area of 6 x 8 m and a height of 1.2 m. The fish used are gorami with 6-8 cm long and nilem with 4-6 cm long, gorami fish from the PangandaranKertayasa farmer group and nilem fish come from the seed hall which triggers gorami stock and nilem (BPPSIGN) Tasikmalaya. Obtained data are done at the beginning of the study and every 10 days, namely on day 10th, 20th, 30th and 40th. The parameters observed included daily growth rate, survival rate, feed efficiency, periphyton abundance and water quality. The results showed the stocking density of 30 fish m2 -1gorami with 20 fish m2 -1nilem was the most optimal stocking density with survival rate of 93.5%, daily growth rate of 1.19%, and gorami’s feed efficiency is 32.66%. Pond water quality including temperature, pH and dissolved oxygen is still within optimum range in accordance with the Indonesian National Standard for maintenance of gorami and nilem.

Open Access Original Research Article

Abundance and Diversity of Snails in Relation to Physicochemical Parameters along Kwadom Stream, Gombe State, Nigeria

Murna Tela, Abubakar Usman

Asian Journal of Fisheries and Aquatic Research, Page 1-6
DOI: 10.9734/ajfar/2021/v14i630310

Aims: The aim of the study is to investigate the abundance and diversity of snails along Kwadom stream, Gombe state, Nigeria.

Study Design:  Snails were collected using a benthic scoop net with mesh size of 0.2 mm and hand picking from three sampling stations (home, farmlands, and fishponds sites) along Kwadom stream; between 6:30 am to 11:00 am weekly. In addition, physicochemical parameters (temperature, dissolved oxygen, conductivity, alkalinity, water depth and pH) were measured fortnightly to determine their effect on the diversity of snail species.

Place and Duration of Study: The study was conducted along Kwadom stream in Yamaltu Deba Local Government Area of Gombe State, Nigeria from March to July 2021.

Methodology: Snails were collected from each of the three stations and identified to species level using hand lens and taxonomy keys. Water physicochemical parameters: temperature, dissolved oxygen, conductivity, alkalinity, water depth and pH were measured using standard method. General linear models (GLM) were used to compare the abundance and diversity of the snails across the sampling station, as well as the effect of physicochemical parameters on the diversity of snails.

Results: 160 individual snails were recorded from 11 species, including Biomphalaria pfeifferi– the intermediate host of Schistosoma mansoni. The result showed there was a significant difference in the abundance of snails (p<0.01) across the three study sites – home site 68 (42.5%), farmlands site 56 (35%) and fishpond site 36 (22.5%). The home site had a higher diversity of snail species (p<0.01) relative to the farmlands and fishponds sites. Temperature, conductivity, and alkalinity had a significant effect on the diversity of snails.

Conclusion: Overall, Kwadom stream harbors many individual snail species, suggesting the need for educating the public on the mode of transmission of diseases that are caused by these snails.

Open Access Original Research Article

Suitable Stocking Density Ensures Best Production and Economic Returns in Floating Cage Aquaculture System

Naznin Nahar, Md. Istiaque Hossain, Md. Mizanur Rahman, Probin Kumar Dey, M. Shahanul Islam

Asian Journal of Fisheries and Aquatic Research, Page 7-18
DOI: 10.9734/ajfar/2021/v14i630311

The striped dwarf catfish Mystus cavasius being a least concern small indigenous fish it is necessary to protect the species from extinction in the near future. An experiment on production and economic feasibility of Mystus cavasius in cage was conducted for a period of six months from March to August 2020 in beel hilla at Naogaon district of Bangladesh. The study was carried out in nine cages (rectangular 8x5x2 feet size) under three treatments namely T1, T2 and T3 performed with the stocking densities of 46 fry m-2, 92 fry m-2 and 137 fry m-2 and designed each with three replications. The fish was fed with commercial pellet feed (containing 30% crude protein) twice daily at the rate of 5-7% of fish body weight. The total production was found to be significantly (p<0.05) highest in T3 among the three treatments. The net profit was better in T3 than T1 and T2 in terms of better production and money. So, stocking density of Mystus cavasius at the rate of 137 fry m-2 in cage could be an economically feasible aquaculture technique for fish farmers.

Open Access Original Research Article

Determination of Most Reliable Bony Structure For Ageing of Carassius carassius (Linnaeus, 1758) Inhabiting In Duhok River (Iraq)

Jihad Saleem Mohammed, Serap Saler

Asian Journal of Fisheries and Aquatic Research, Page 19-27
DOI: 10.9734/ajfar/2021/v14i630312

In this study, it was aimed to make a comparative age determination in the population of Carassius carassius (Linnaeus, 1758) living in Duhok River. For this purpose, 71 fish samples (57 male and 14 female) were obtained. The bony structures vertebrae, scales, otoliths and operculum used in the age determination. The age groups determined for each bony structure. The number and percentage distributions of individuals in these groups were expressed with tables. The comparison of age matching between bony structures was expressed by figures. The most reliable bony structures were found as vertebrae, otolith, scales and operculum respectively. The highest consistency was observed in the vertebrae (70.42%). The ages changed between I and IX age in Carassius carassius in this study.

Open Access Original Research Article

The Contribution of Fisheries Sector in Regional Development of Karo Regency North Sumatra Province, Indonesia

Rivaldo T. C. Tarigan, Achmad Rizal, Eri Bachtiar, Iwang Gumilar

Asian Journal of Fisheries and Aquatic Research, Page 36-43
DOI: 10.9734/ajfar/2021/v14i630314

This research aims to analyze the growth of the fisheries sector, analyze the commodity market strength of the fisheries sector and analyze the strength of the fisheries sector's base and non-base sectors in regional development in Karo Regency. The method used in this study was a quantitative method using secondary data cross-section and time series which were then analyzed using descriptive statistics, and qualitative methods using primary data obtained through interview questionnaires. Analysis of the data used was growth index analysis, Trade area capture (TAC) analysis, full factor analysis (PF) and minimum requirement approach (MRA) analysis. The results of the growth index analysis show that the Gross Domestic Product (GDP)of the fisheries sector in the Karo Regency has increased by 95% in the period 2009-2018. The results of the 2009-2018 TAC analysis showed that the TAC value> population indicated that the regency was able to capture the opportunities of trade in fisheries products in other regions. PF value of the fisheries sector> 1 can attract customers from other regions and has a specialization in terms of fishery product markets. MRA analysis results in 2017 obtained the largest base multiplier in Bulang District with a value of 12.9 which means that every 120 workers in the base sector are expected to create 9 workers in the non-base sector.