Asian Journal of Fisheries and Aquatic Research

This research work presents useful information about different floatable fish feeds obtained from different companies, which serves as database for people work intensively in fish farming and help them in solving many problems associated with the feeding effectiveness and feed handling. The main objective of this project is to study some physical and mechanical properties of fish feed pellets of different sizes. These properties included; Density, Moisture content, Surface area, Floatability, Sizes, Sinking velocity, Expansion ratio, Repose angle. The actual sizes of the extruded fish feed used ranged from 3 mm to 9 mm, However, Company 1 did not have 9 mm for producing that size of the pellet. The floatability ranged from 79.51 to 98.00%, the density ranged from 0.03 to 0.08 g/cm³, the moisture content ranged from 8.94 to 29.26%, the expansion ratio ranged from 1.02 to 1.54%, the sinking velocity ranged from 0.008 to 0.1 m/s², the repose angle ranged from 27 to 38° while the colour of the feed ranged from light to dark brown according to Tables 1, 2 and 3 respectively. The results obtained from the experiment were subjected to ANOVA test using SPSS (Special Packages for Social Science) package. The physical and Mechanical properties of the floatable fish feed obtained from these three companies were significantly different from one another.

Nilem fish (Osteochilus hasselti) is a type of freshwater fish that is widely farmed in West Java. Nilem fish can be made into fish protein concentrate (FPC) flour, so that it can have wide application. The addition of fish protein concentrate flour to the mochi cake might affect the organoleptic characteristics. This research aims to determine the proper concentration of nilem fish protein concentrate to get the mochi cake that was preferred by panelists. This research was conducted from August 2019 - January 2020 at the Laboratory of Fisheries Product Processing, Faculty of Fisheries and Marine Sciences, Padjadjaran University. The method used in this research was experimental with four treatments, which is the addition of 0%, 3.5%, 4.5% and 5.5% nilem fish protein concentrates from white glutinous rice flour was used. The parameters observed were the preference level of color, aroma, texture, and taste of Mochi cake. The results showed that mochi cake with the addition of 4.5% nilem fish protein concentrate flour produced a mochi cake that was preferred most by panelists, which has a characteristic ivory white color, a bit of fish smell, chewy but dense enough and sweet taste with a little typical flavor of nilem fish protein concentrate.

This research aims to determine the appropriate level of the addition of mackerel fish head flavor powder to obtain the cilok most preferred by panelists. This research was conducted from September to December 2019 at the Fishery Product Processing Laboratory, Faculty of Fisheries and Marine Sciences Universitas Padjadjaran. The method used is experimental with 4 treatment levels of adding mackerel fish head flavor powder that is 0%, 5%, 6%, and 7% of the amount of tapioca flour and wheat flour used. The parameters observed were the level of preference for appearance, aroma, texture, and taste of cilok. Based on the research results it can be concluded that the most preferred cilok was obtained from the treatment of adding mackerel fish head flavor powder as much as 6%.

This research was purposed is to find the optimum current for growth and growth of Bonylip Barb fingerlings (Osteochilus hasselti C.V). Method used in this research is compelitely Randomized Design (CRD), consists of three treatments and four replications. The treatments are : A (without current or (control), B (with 0.1 ms-1 water current) and C. (0.1 ms-1 water current cabined with venture aeration). Bonylip Barb of 4 – 6 cm size are kept as many as 15 fish / x Liters and the amount of feed given is adjusted to the feeding rate (FR) of 10 % of Bonylip Barb biomass carried out every three times a day and adjusted for growth every ten days. Water quality during maintenance (40 days) was observed once every 10  days while survival, absolute weight growth, daily growth rate, feed conversion ratio and feed efficiency were observed every ten days. After 40 days of maintenance,  the best result showed 0.1 ms-1, with 100% survival rate , 6.09 g absolute growth, 3.13% specific growth rate , 3.48% feed conversion ratio was , and  30.04%. feed efficiency.

The Cisayong area of ​​Tasikmalaya Regency is an area that is passed by the Citanduy River. Citanduy River has received a variety of inputs, that affect the river water quality and cause pollution. Macrozoobenthos can be used as an indicator of water pollution. This research aims to determine the spatial distribution of the macrozoobenthic community as a bioindicator of organic matter pollution in the Citanduy River, Cisayong Tasikmalaya Region, West Java. This research was conducted on January 2 - March 3, 2020. The research method used a field survey method. The data collection technique used purposive sampling by determining 4 stations based on environmental factors and land use around the river flow. The results of the macrozoobenthic spatial distribution along the Citanduy River were different at each observation location. At station 1 several intolerant species Heptagenia sp., Leptophelbia sp., and Hydropsyche sp. Were found, station 2 found several facultative species Melanoides tuberculata, Lymnea sp., Tarebia granifera, Sulcosfira testudinaria, Filopaludina javanica, and Pomacea canalicuta, station 3 found several tolerant species Chironomus sp., and Tubifex sp., station 4 were found several species of facultative and tolerant macrozoobenthos Melanoides tuberculata, Lymnea sp., Tarebia granifera, Sulcosfira testudinaria, Filopaludina javanica, Pomacea canalicuta, and Tubifex sp. The abundance of macrozoobenthos in the Citanduy River ranges from 1460-2540 ind/m². Diversity index ranges from 1.53 to 1.79. The uniformity index ranges from 0.45 to 0.53. Species deficits at each station are different. The Morisita index ranges from 0.48 to 1.12 representing uniform categories and groups.