Journal of Fisheries http://journal.bdfish.org/index.php/fisheries <p>The <em>Journal of Fisheries</em> is a double blind peer reviewed open access journal published by BdFISH that provides rapid publication of articles in all areas of fisheries science. The journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. All issues (full) of the <a title="Journal of Fisheries" href="http://journal.bdfish.org/" target="_blank" rel="noopener">Journal of Fisheries</a> are also available on <a title="Journal of Fisheries also availabel on BdFISH Document" href="http://document.bdfish.org/category/journal/journal-of-fisheries/" target="_blank" rel="noopener">BdFISH Document</a>.</p> <p><strong>Journal of Fisheries at a glance</strong></p> <ul> <li class="show">ISSN: 2311-3111 (Online) and 2311-729X (Print)</li> <li class="show">Year of launching: December, 2013</li> <li class="show">Editor-in-Chief: Professor M Nazrul Islam</li> <li class="show">Journal policy: Open Access, Peer Reviewed, Online First!</li> <li class="show">Article publishing cost: Free of cost</li> <li class="show">Journal issues: 3 issues in a year (April, August, and December), accepted article is published online as Online First! and will be included in the contents of the upcoming issue</li> <li class="show">Journal operation financed by: BdFISH</li> <li class="show">Web: <a title="Journal of Fisheries" href="http://journal.bdfish.org/" target="_blank" rel="noopener">journal.bdfish.org</a></li> </ul> <p>&nbsp;</p> BdFISH, Department of Fisheries, University of Rajshahi, Rajshahi 6205, Bangladesh en-US Journal of Fisheries 2311-729X Growth dependent changes in protein efficiency and amino acid composition in cultured meagre Argyrosomus regius http://journal.bdfish.org/index.php/fisheries/article/view/JFish91202 <p>The goal of this research was to determine the growth dependent changes in protein efficiency and amino acid composition of the cultured meagre <em>Argyrosomus regius</em> (Asso, 1801). The research was carried in net cages in a private company (Gokce Off-shore Sist.) in the Aegean Sea. Meagre of an initial weight of 8.22 ± 0.13 g reached to 373.96 ± 15.65 g in 420 days of production period. Average protein efficiency rate, protein store rate and protein consumption values of cultured meagre were 1.05 ± 0.11%, 11.49 ± 2.98% and 56.67 ± 14.52 g respectively. The total amino acid values varied between 14.97 ± 0.14 and 18.87 ± 0.10 g 100g<sup>–1</sup>, the statistical difference among the study periods was significant (<em>p </em>&lt; 0.05). Most of the total essential (EAA), non-essential (NEAA), and branched‐chain amino acid values of cultured meagre were decreasing with increasing fish size but EAA/NEAA ratios were increasing. The findings of this study showed that the composition of amino acids and the consistency of meagre culture were adequate and appropriate for human consumption and nutrition.</p> Birol Baki Dilara Kaya Öztürk Murat Kerim Copyright (c) 2021 Journal of Fisheries https://creativecommons.org/licenses/by-nc-sa/4.0/ 2021-02-23 2021-02-23 9 1 91202 91202 Length–weight relationship and condition factor of ten cyprinid fish species from the Caspian Sea, Urmia Lake and Persian Gulf basins of Iran http://journal.bdfish.org/index.php/fisheries/article/view/JFish91401 <p>In this study, the length-weight relationships (LWRs) and condition factor (<em>K</em>) were estimated for 1334 specimens belonging to ten species including <em>Acanthobrama marmid</em>, <em>A. microlepis</em>, <em>A. urmianus</em>, <em>Romanogobio persus</em>, <em>Leuciscus aspius</em>, <em>Luciobarbus capito</em>, <em>L. mursa</em>, <em>L. caspius</em>, <em>Alburnus atropatenae</em> and <em>Petroleuciscus ulanus</em> from the Caspian Sea, Urmia Lake and Persian Gulf basins of Iran. The total length and weight of the individuals varied from 3.4 to 84.5 cm and 0.4 to 6600 g respectively. The values of the slope parameter (<em>b</em>) and condition factor ranged from 2.99 – 3.38 and 0.79 – 1.25 respectively. LWRs with high correlation coefficients were calculated for all species (<em>R<sup>2</sup></em> &gt; 0.95). Based on the results, the allometric growth pattern of the studied species were positive except for <em>L. aspius</em>, <em>L. capito</em>, <em>L. mursa</em> and <em>P. ulanus</em>. This study provides useful data regarding the LWRs and condition factor of ten endemic fish species in Iranian inland waters that can be used in fisheries management, stock assessment and future studies.</p> Atta Mouludi-Saleh Soheil Eagderi Keivan Abbasi Seyed Mohammad Salavatian Copyright (c) 2021 Journal of Fisheries https://creativecommons.org/licenses/by-nc-sa/4.0/ 2021-02-12 2021-02-12 9 1 91401 91401 Effects of feeding frequency on the growth and production performance of indigenous catfish Clarias batrachus (Linnaeus, 1758) in ponds of Northern Bangladesh http://journal.bdfish.org/index.php/fisheries/article/view/JFish91201 <p>Effects of feeding frequency on the growth performance and production of <em>Clarias batrachus</em> was evaluated for a period of 180 days. Feeding frequency were once (T<sub>1</sub>), twice (T<sub>2</sub>) and thrice (T<sub>3</sub>) per day. Stocking density was 16750 fingerlings ha<sup>–1</sup>. The fish were initially fed 28% protein containing formulated feed at the rate of 8% of body weight which subsequently reduced to 5% at the end. The water quality parameters were monitored fortnightly and found similar across treatments and remained within the suitable ranges for aquaculture. The mean weight gain was 41.14±0.15, 44.49±0.78 and 56.10±0.86 g and specific growth rate (SGR) of 1.29±0.002, 1.33±0.01 and 1.44±0.01% per day in T<sub>1</sub>, T<sub>2</sub> and T<sub>3</sub> respectively. The highest survival rate was in T<sub>2</sub> (96.23±0.76%) whereas the lowest was in T<sub>1</sub> (95.32±0.76%). The lowest FCR (=best; 1.65±0.12) was found in T<sub>3</sub> and the highest FCR (=worst; 2.14±0.15) was recorded in T<sub>1</sub>. The highest production was observed in T<sub>3</sub> (3559.27±85.95 kg ha<sup>–1</sup>), which was significantly higher than that of other treatments. This study concludes that feeding three times per day is effective for <em>C. batrachus</em>.</p> Md. Selim Reza Md. Abdus Samad Jannatul Ferdous Copyright (c) 2021 Journal of Fisheries https://creativecommons.org/licenses/by-nc-sa/4.0/ 2021-01-30 2021-01-30 9 1 91201 91201 Water pollution effects of river Saraswati and Kunti on livelihood: a case study of fishermen communities in Tribeni and Kuntighat, Hooghly, West Bengal http://journal.bdfish.org/index.php/fisheries/article/view/JFish20193 <p>A prolific study was conducted to find out the impact of pollution on the socio-economic status of the fishermen community of Tribeni, Kuntighat - Hooghly, West Bengal, who depend on the rivers Saraswati, Kunti and Ganga for their livelihood. Analysis of important water quality parameters clearly reflects the pollution status of the rivers Saraswati and Kunti. Investigation was carried out by a previously tested questionnaire and personal interaction with 100 fishermen based on which the probable reasons of decline in fish diversity were drawn, which consequently adversely affected the economic conditions of fishermen. The investigation revealed a positive correlation between discharge of industrial effluents, in turn depleting the availability of fish food organisms and fish diversity and warning socioeconomic conditions of fishermen. Results clearly indicate proper steps should be taken by the policy makers towards restoration of water quality and thereby helping the vulnerable fishermen.</p> A. K. Panigrahi Subasini Pattnaik Copyright (c) 2020 Journal of Fisheries https://creativecommons.org/licenses/by-nc-sa/4.0/ 2020-12-24 2020-12-24 9 1 928 934 Effect of carp species combination on production and economics of stinging catfish, Heteropneustes fossilis based polyculture in homestead ponds under drought prone area of Bangladesh http://journal.bdfish.org/index.php/fisheries/article/view/JFish20282 <p>Aquaculture of homestead ponds under drought prone areas is climatically challenged by increased temperature and decreased water level. These ponds are potentials for farming of a short cycle aquaculture species like <em>Heteropneustes fossilis</em> with carps but lack of appropriate species combination is the major constraint for promotion of this technique. To address this problem, an experiment was carried out during July to December, 2019 to evaluate the production and economics of <em>H. fossilis</em> based polyculture under different carp species combinations in homestead ponds in Tanore of Rajshahi district, Bangladesh. Three different combination of carps were tested under three treatments as T<sub>1</sub>:&nbsp; <em>Labeo rohita</em> dominant carps (<em>L. rohita</em> 50%, <em>Gibelion catla</em> 25% and <em>Hypophthalmichthys molitrix</em> 25%); T<sub>2</sub>: <em>G. catla</em> dominant carps (<em>L. rohita</em> 25%, <em>G. catla</em> 50% and <em>H. molitrix</em> 25%); and T<sub>3</sub>: <em>H. molitrix</em> dominant carps (<em>L. rohita</em> 25%, <em>G. catla</em> 25% and <em>H. molitrix</em> 50%), each with three replications. Stocking densities were 123500 ha<sup>–1</sup> for of <em>H. fossilis</em> was and 988 ha<sup>–1</sup> for carps. Water quality was monitored monthly and found within acceptable range. T<sub>3</sub> was found significantly (<em>p</em> &lt; 0.05) better than other groups in terms of yield and cost benefit ratio.</p> S. M. Nurun Nabi Md. Akhtar Hossain M. Manjurul Alam Md. Harun-Ur-Rashid Md. Anwar Hossain Copyright (c) 2020 Journal of Fisheries https://creativecommons.org/licenses/by-nc-sa/4.0/ 2020-12-23 2020-12-23 9 1 920 927