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 Quality and shelf life of vacuum- and nitrogen-packed dried barb fish (Puntius spp.) http://journal.bdfish.org/index.php/fisheries/article/view/JFish20253 <p>Vacuum and modified atmosphere packaging are widely used for preserving food items including fish. In this context, the quality and shelf life of air- (control), vacuum- and nitrogen-packed dried barb fish (<em>Puntius</em> spp.) stored at ambient temperature were evaluated through biochemical and microbial analyses for 90 days. In most of the storage days, significantly lower values of moisture, total volatile base-nitrogen (TVB-N) and peroxide value (PV) were observed in the vacuum pack sample compared to control. However, the TVB-N, PV, total coliforms and faecal coliforms counts were within the acceptable limit in all groups. The total plate count (TPC) increased gradually with time from an initial value of 4.29 log CFUg<sup>–1</sup>. However, compared to control, significantly lower TPC were found on and after the 30<sup>th</sup> day of storage in vacuum and nitrogen pack samples. Considering the TPC value of 5 log CFUg<sup>–1</sup>, the shelf life was determined at approximately 15 days for control, 35 days for nitrogen pack and 45 days for vacuum pack samples. Therefore, the vacuum pack is considered the best packaging, which may be utilised by the processors to produce and retail the dried products with prolonged shelf life.</p> Paromita Chowdhury Masudur Rahman Syeda Nusrat Jahan Fawzia Adib Flowra Md Tariqul Islam Copyright (c) 2020 Journal of Fisheries https://creativecommons.org/licenses/by-nc-sa/4.0/ 2020-09-26 2020-09-26 Relationship between cortisol and glucose as physiological stress indicators during growth season in juvenile Siberian sturgeon Acipenser baerii http://journal.bdfish.org/index.php/fisheries/article/view/JFish20191 <p>The relationship between cortisol and glucose was studied in two-year old farmed Siberian sturgeon <em>Acipenser baerii</em> with a body weight of 340±30 g (mean ± SD) and total length of 45±1 cm from August to November 2017. Thirty-six individuals were randomly selected and stocked in some 3×300 L fiberglass tanks. Blood samples were collected monthly from the tagged fish. The mean cortisol in August, September, October and November were 4.7±0.9, 23.5±3.0, 6.3±0.9 and 7.4±0.9 ng mL<sup>–1</sup> respectively whereas glucose concentrations were 44.6±0.4, 27.3±0.6, 49.2±0.7 and 48.5±0.7 mg dL<sup>–1</sup> respectively indicating a significant increase in cortisol and decrease in glucose in September, may be due to the exposure to prolonged high temperature (26–28.5°C). Although it was expected to happen naturally due to hyperglycemia of cortisol but no such phenomena was detected. Our results suggest that the consumption of glucose for maintenance of homeostasis and physiological status is a mechanism against the non-optimal thermal regime. This mechanism consumes glucose at a rate higher than that produced by cortisol, causing significant decrease of plasma glucose. In general, there was a reverse relationship between cortisol and glucose concentration during the experiment in Siberian sturgeons.</p> Soheil Eagderi Hadi Poorbagher Alireza Hasanalipour Erdoğan Çiçek Copyright (c) 2020 Journal of Fisheries https://creativecommons.org/licenses/by-nc-sa/4.0/ 2020-09-21 2020-09-21 Effects of different background colors on adult spawning, egg hatchability, and larval survival of zebrafish (Danio rerio) http://journal.bdfish.org/index.php/fisheries/article/view/JFish20241 <p>Background color has significant effects on the reproductive and survival performance of fish species. While zebrafish (<em>Danio rerio</em>) is a popular species in laboratory and recreational aquaculture, very little has been known about its background color preference. Thus, this study evaluated the effects of different colors of aquaria on the spawning, hatching, and survival of this species. The study found that zebrafish do not have color preference for spawning. Though red and black backgrounds are statistically comparable, these colors showed significantly higher (<em>P</em> &lt; 0.05) hatching and survival rates than other colors used in this study. Furthermore, performance of red was higher than black but it was not statistically significant. This study reveals that, among all colors evaluated, red is the most suitable for hatching of zebrafish eggs and survival of its larvae whereas, yellow and transparent should be avoided.</p> Marwin B. Dela Cruz Copyright (c) 2020 Journal of Fisheries https://creativecommons.org/licenses/by-nc-sa/4.0/ 2020-09-21 2020-09-21 Meristic and morphometric characteristics of the Black Sea salmon, Salmo labrax Pallas, 1814 culture line: an endemic species for Eastern Black Sea http://journal.bdfish.org/index.php/fisheries/article/view/JFish20250 <p>The Black Sea salmon <em>Salmo labrax</em> Pallas, 1814 is an essential species for the Turkish aquaculture sector, given increasing trends of the annual productions. To date, there are few studies on meristic and morphometric characteristics of this species. In this study, the fifth filial generation of the species was specified and studied for meristic and morphometric characteristics. The results obtained in this study were compared with available literature and a similarity was found between the study specimens and wild individuals. The morphological characteristics of any cultured species is valuable especially when a new culture generation is formed and therefore this study outcomes may provide important information to the literature.</p> Nazli Kasapoglu Ekrem Cem Çankırılıgil Eyüp Çakmak Osman Tolga Özel Copyright (c) 2020 Journal of Fisheries https://creativecommons.org/licenses/by-nc-sa/4.0/ 2020-09-16 2020-09-16 Feed intake, nutrient digestibility and nutrient retention in Atlantic salmon (Salmo salar L.) fed diets with different physical pellet quality http://journal.bdfish.org/index.php/fisheries/article/view/JFish20133 <p>Three feeds with different physical pellet quality but the same formulation were fed to Atlantic salmon for 97 days. Pellet quality was measured as bulk density, durability, fat leakage, hardness, water stability and porosity. The largest difference among the feeds was measured in hardness (201, 236 and 86 Newton for Diet 1, Diet 2 and Diet 3 respectively). The relative feed intake was highest in salmon fed Diet 2 and Diet 3 with no effects of pellet hardness. Growth and feed efficiency ratio were similar among all fish. The apparent digestibility of energy, dry matter, nitrogen and lipid was similar for all feeds, whereas the apparent digestibility of phosphorus and zinc was the lowest in Diet 3. Retention of energy, lipid and nitrogen was also similar for all feeds. Salmon fed Diet 1 and Diet 3 retained more phosphorus than those fed Diet 2. An increased retention of the digested zinc was found in salmon fed Diet 3. This study concludes that physical pellet quality affects feed intake and improve utilisation of feed in salmon if optimised properly. Moreover, pellet hardness can be optimised in commercial scale without compromising feed intake as it has no influence on feed intake.</p> Turid Synnøve Aas Hanne Jorun Sixten Marie Hillestad Trine Ytrestøyl Harald Sveier Torbjørn Åsgård Copyright (c) 2020 Journal of Fisheries https://creativecommons.org/licenses/by-nc-sa/4.0/ 2020-08-03 2020-08-03 768 776