Asian Journal of Fisheries and Aquatic Research <p style="text-align: justify;"><strong>Asian Journal of Fisheries and Aquatic Research</strong> aims to publish high quality papers (<a href="/index.php/AJFAR/general-guideline-for-authors">Click here for Types of paper</a>) on all areas of aquatic research. This journal facilitates the research and wishes to publish papers as long as they are technically correct, scientifically motivated. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer reviewed, open access INTERNATIONAL journal.</p> en-US (Asian Journal of Fisheries and Aquatic Research) (Asian Journal of Fisheries and Aquatic Research) Fri, 25 Oct 2019 00:00:00 +0000 OJS 60 Capture Process of White Pomfret (Pampus argenteus) on Gillnet: A Case Study of Pangandaran Regency, Indonesia <p>Gillnet is a wall of netting that hangs in the water column, typically made of monofilament or multifilament nylon, had the same size and usually used by fisherman in Pangandaran. This research aims to see the capture process of white pomfret (<em>Pampus argenteus</em>) on gillnet in Pangandaran Regency. This research was conducted in August 2018 and January 2019 in Pangandaran. The data used in this research are primary data consisting of the proportion of catches and capture process, whereas secondary data obtained from Dinas Perikanan Pangandaran. The results of this research show that the quantity and weight proportion of main catch &gt; bycatch and captured process of white pomfret dominated by wedged by 94% and the lowest is gilled by 6%.</p> Dear Frans Lyandre Simanjorang, Izza Mahdiana Apriliani, Herman Hamdani, Yuniar Mulyani ##submission.copyrightStatement## Fri, 25 Oct 2019 00:00:00 +0000 Stock Estimates of White Pomfret (Pampus argenteus) Based on Length and Weight Data in Pangandaran Waters <p>White pomfret (<em>Pampus argenteus</em>) is one of the economically important fish and includes the leading commodity in Pangandaran Waters. Information on fishing biology of those species were still limited. The purpose of this study is to determine stock estimates including length-weight relationship, age group, growth, mortality and exploitation rate of white pomfret. Monthly length-frequency data have been collected from November 2018 to August 2019 at Cikidang fish auction. Fish length-frequency distribution was separated into a normal distribution using the Bhattacharya method with software of FiSAT (FAO-ICLARM Stock Assessment Tools). Estimation of population parameters used analytical model application with ELEFAN-1 (Electronic Length Frequency Analysis) program. The results showed that lengths distribution of white pomfret ranged between 19.3 cm - 36.8 cmTL. Length-weight relations was negatively allometric (W = 0,1184L<sup>2,3719</sup>). Growth equation of white pomfret is Lt = 53.04 (1-e<sup>-0.26(t)</sup>). Natural mortality (M) was 0.60/year, fishing mortality (F) was 3.04/year and total mortality (Z) was 3.64/ year. The exploitation rate (E) was 0.84. It is mean that higher than optimal exploitation so that the white pomfret fish population in a state of overfished. It is necessary to better policy in the management of white pomfret through precaution approach and describing of biological and fishing aspect in Pangandaran Waters.</p> Yaris Hikmawansyah, Yuli Andriani, Alexander Muhammad Akbar Khan, Lantun Paradhita Dewanti ##submission.copyrightStatement## Sat, 26 Oct 2019 00:00:00 +0000 Microbial Communities of Culture Water and African Catfish Reared in Different Aquaculture Systems in Nigeria Analyzed Using Culture Dependent Techniques <p>The microbial communities of culture water and catfish <em>C. gariepinus</em> from three replicates of earthen, concrete and tarpaulin ponds in Nigeria were analyzed. Waters was collected from 25 cm below pond water surface per culture system. Three catfish per replicate system were also collected and analyzed in the lab. Catfish gut, skin and gills were analyzed. Earthen ponds had significantly more diverse microbial community and coliform forming units (CFU/ml) 2.43 x10<sup>-4</sup> CFU/ml than the rest systems. Earthen ponds had consortium of <em>Klebsiella pneumonia</em>, <em>S. aureus</em> and <em>Salmonella enteritidis</em> and <em>E. coli</em>, which was more diverse than all other aquaculture systems.&nbsp; Microbiota of tarpaulin ponds was 2.10x10<sup>-4</sup> /ml CFU and this was significantly (P&lt;0.05) higher than concrete ponds (1.50x10<sup>-4</sup> CFU/ml). Tarpaulin ponds had <em>K. pneumoniae</em> and <em>E. coli</em>, while concrete pond had <em>S. aureus</em> and <em>S. enteritidis</em>. Biofilm formation could have lead to colonization of the fish body part. The skin and gills had similar microbiota as the culture water compared to the gut. The gut microbial communities were not synonymous with the culture water.</p> D. Enyidi Uchechukwu, M. T. Okoli ##submission.copyrightStatement## Sat, 02 Nov 2019 00:00:00 +0000 Dietary Effects of Tiger Nut (Cyperus esculentus) on Egg and Milt Quality of African Catfish (Clarias gariepinus) Broodstocks (Burchell, 1822) <p>The dietary effect Tiger nut (<em>Cyperus esculentus</em>) seed powder was examined on the egg and milt quality of African catfish broodstock.45 Female catfish broodstock of average body weight, 475 ± 25.00g and male catfish broodstock of average body weight, 487.09±13.57 g. Five diets with crude protein of 40% were formulated with different inclusion levels of <em>Cyperus esculentus</em> seed powder; 0, 0.5, 1.0, 1.5, 2.0 g per 100 g of experimental diet (D<sub>1</sub>, D<sub>2 </sub>,D<sub>3</sub>, D<sub>4 </sub>and D<sub>5</sub>). The experiment was carried out for 70 days and fish fed twice daily at 3% body weight. Fish fed experimental diets showed significantly improved growth performance and reproductive indices over the control treatment. Fish fed D<sub>3</sub> had the highest weight gain (173.6±10.98) in female catfish while D<sub>5</sub> had highest weight gain (215.17±11.62) in male catfish. Fish fed with D<sub>4 </sub>had the highest percentage fertilization (93.00±3.05) and percentage hatchability (85.00±2.64) in female catfish while in male catfish the highest percentage fertilization (94.00±1.29) and hatchability (79.17±10.09) was from D<sub>5</sub>. Percentage survival and gonadosomatic index was higher in fish fed D<sub>5</sub> in both female and male catfish. Histology of fish fed with<em> Cyperus esculentus </em>diets revealed oocytes formation within the ovaries. Ovary of fish fed D1 showed primary oocytes, with primary yolk accumulation in the ovary of fish fed D<sub>2</sub> and there were improvement in the oocytes. Fish fed D<sub>3</sub>, D<sub>4</sub> and D<sub>5</sub> showed more matured oocytes and ripe yolk of late maturing stage. There was reduced seminiferous tubular lumen and scanty spermatozoa in D<sub>1</sub> and D<sub>2</sub> and there was high spermatozoa density in the seminiferous lumen seen in the testicular histology of fish fed diets D<sub>3</sub>, D<sub>4</sub> and D<sub>5</sub>. This result revealed that dietary inclusion of<em> Cyperus esculentus </em>seed powder enhance growth and improves fertility in<em> Clarias gariepinus </em>which will improve the quantitiy of its seed production.</p> Adekunle Ayokanmi Dada, Gbajuola Gideon Oluwagbohunmi, Adedapo Adejoke Adeola, Oke Israel Opeyemi ##submission.copyrightStatement## Fri, 15 Nov 2019 00:00:00 +0000