Open Access Original Research Article

Influence of Stocking Density on Growth Performance of Labeo bata in Cage at River Padma, Rajshahi, Bangladesh

Naznin Nahar, Sadia Afrin, Md. Istiaque Hossain, Md. Abdus Samad, Farhabun Binte Farhad, Mohammad Lutfar Rahman

Asian Journal of Fisheries and Aquatic Research, Page 1-11
DOI: 10.9734/ajfar/2021/v11i430208

As a result of climate change, aquaculturists are seeking adaptive culture techniques for sustainable aquaculture. In this case, cage culture is a suitable technique that can mitigate the challenge of climate change, but due to the lack of knowledge of proper stocking density, often productions are not satisfactory. Therefore, the experiment was conducted to evaluate the influence of stocking density on growth and production of an endangered minor carp bata (Labeo bata) in cages for a period of 120 days in Padma River, Rajshahi, Bangladesh. On an average initial weight of bata fingerling of 5 g was stoked in cages under three treatments each with containing three replications using three different stocking densities (106, 71 and 35 fingerling/m3 for T1, T2 and T3, respectively). Supplementary feed (3% per body weight) was given to the cultured species twice in a day. The mean values of water temperature, transparency, pH and dissolved oxygen were in suitable range throughout the experimental period. Significantly (p<0.05) highest mean gross weight (85.82±0.70 g), specific growth rate (2.37± 0.02%), survival rate (83± 3.00%) and food conversion ratio (2.27± 0.03) was found in T3 rather than T2 and T1. The net production in terms of biomass (18.23±2.43 kg/cage) was significantly (p<0.05) higher in T2.The study suggests that, treatment T2 (71 fingerling /m3) as the optimum stocking density to produce maximum production by cage culture of Labeo bata.

Open Access Original Research Article

Strategy for the Development of Seaweed Cultivation in Karawang Regency, West Java Province

M. F. A. Pratama, A. Nurhayati, A. Rizal, A. A. H. Suryana

Asian Journal of Fisheries and Aquatic Research, Page 12-22
DOI: 10.9734/ajfar/2021/v11i430209

Seaweed is one of the leading commodities in the marine sector which has a high selling value. However, this potential is currently not optimally utilized in Karawang Regency. Karawang Regency has a large enough potential for aquaculture ponds, has a pond area of 18,273.30 hectares, and only 1% is cultivated for seaweed. This research aims to formulate a seaweed cultivation business development strategy that has not developed optimally. The respondents in this research were all 60 seaweed cultivators in Karawang Regency. The data used were primary and secondary data. Primary data were obtained through an interview with seaweed cultivators and using the questionnaire. Secondary data were obtained from institutions/agencies related to research, such as the Karawang Regency Fisheries Service The data analysis method used in this research is qualitative analysis. Qualitative analysis was used to determine a seaweed cultivation development strategy using a SWOT analysis. The results showed that the relative position of seaweed cultivation development based on the SWOT analysis is in the first quadrant which means the strategy used is a progressive or aggressive. The progressive strategy of developing seaweed cultivation can be carried out with strategies such as increasing production to meet the demand for seaweed, expanding the area for seaweed cultivation, empowering local communities about seaweed cultivation and diversifying processed seaweed products.

Open Access Original Research Article

Biological Parameters of Lethrinus nebulosus in the Arabian Gulf on the Saudi Arabian Coasts

Jabeur Chédia

Asian Journal of Fisheries and Aquatic Research, Page 23-31
DOI: 10.9734/ajfar/2021/v11i430210

In the present study about 277 specimens of Lethrinus nebulosus were used to determine some biological parameters which are needed in stock assessment in the region of Arabian Gulf on the Saudi Arabian coasts. The period of spawning was estimated using maturity indexes to April, Mai and June. This species is gonochoric, nevertheless some cases of hermaphrodism are noted. The length relationships were determined showing a correlation between total length and standard length, and between total length and fork length. The weight- length relationship is allometric minorante. The model of Von Bertalanffy was estimated for the studied species and it is as follows:  Lt = 600 *(1-exp (-0.135*(t+1.69)) for both sexes, Lt = 600 (1-exp (-0.166*(t+0.746)) for females and Lt = 555 *(1-exp (-0.153*(t+1.62)) for males.

Open Access Original Research Article

The Effect of Difference Culture Media Maggot Black Soldier Fly Hermetia illucens (Linnaeus, 1758) (Diptera: Stratiomyidae) on the Growth of Striped Catfish Seeds Pangasianodon hypophthalmus (Sauvage, 1878) (Pangasiidae)

Kiki Haetami, Yayat Dhahiyat, Ibnu Bangkit Bioshina Suryadi, Bagja Satria Zulkarnaen

Asian Journal of Fisheries and Aquatic Research, Page 32-42
DOI: 10.9734/ajfar/2021/v11i430211

The purpose of this study was to determine the type of maggot media that can produce the highest survival, growth, feed efficiency and lowest feed conversion ratio (FCR) to Striped catfish fingerling. This research was conducted during July 2020 – January 2021 at the Laboratory of Building 4, Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran. The research method was carried out experimentally using the Completely Randomized Design (CRD) method and four treatments. The treatment given is a combination of commercial feed and maggot with different media consisting of A (50% commercial feed + maggot with 50% mixed media), B (50% commercial feed + maggot with 50% fruit media), C (50% commercial feed + maggot with 50% layer media) and D (50% commercial feed + maggot with 50% bran media). The parameters observed were survival, daily weight growth rate, length, feed efficiency, food conversion ratio and water quality. . Giving a combination of 50% commercial feed and cultured maggot with mixed media of 50% gave the best daily growth rate, length growth and feed efficiency results, namely 1.23%, 0.99% and 62.79% and the lowest feed conversion ratio value. that is 1.67.

Open Access Original Research Article

Analysis of Society's Fish Consumption in Cilaku Cianjur District Area

Nabila Mayangsari, Achmad Rizal, Dedi Supriadi, Asep Agus Handaka Suryana

Asian Journal of Fisheries and Aquatic Research, Page 43-50
DOI: 10.9734/ajfar/2021/v11i430212

This study aimed to analyze the characteristics of fish consumers, analyze the level of favorite and types of fish that were often consumed by the people, and analyze the factors that affect fish consumption which the research was conducted in Cilaku Subdistrict on September – December 2020. The research used a case study method with used primary and secondary data. The resulted of primary data were from interviewed with 100 respondents using purposive sampling method as a research sample. Secondary data was obtained from relevant agencies. The analysis used descriptive and rank spearman test method to analyze the motivational influence for fish price, family influence, and fish quality. The results showed that consumers who buy and consume fish in Cilaku subdistrict were generally women who has a family in aged < 43 years with a high school education level and work as employee. Buyers and fish eaters in Cilaku Subdistrict had an income of Rp 2,100,000 - Rp 3,000,000. Totally, the 57% of respondents in Cilaku Subdistrict like fish to be consumed. The type of fish which usually they consume were 58% of freshwater fish, 27% of seawater fish, and 15% of processed fish. The factors that most influence fish purchasing decisions according to spearman rank tests were the influence of culture, fish prices, consumer family influences, and fish quality.