Jurnal Iktiologi Indonesia http://jurnal-iktiologi.org/index.php/jii <p style="text-align: justify;">Jurnal Iktiologi Indonesia (<em>Indonesian Journal of Ichthyology</em>), is a scientific journal published by the&nbsp; Indonesian Ichthyological Society. Initially, <strong>Jurnal Iktiologi Indonesia (JII)</strong> was published twice a year (biannual), namely June and December; but since 2014 JII has been published regularly three times a year (triannual), namely in February, June, and October.</p> <p style="text-align: justify;">The aims of this journal is to publish high-quality articles dedicated to all aspects of fishes (pisces) in fresh, brackish, and sea waters including biology, physiology, and ecology, and their application in the fields of fishing, aquaculture, fisheries management, and conservation. Articles can be in the form of research papers, topic summaries, brief reviews, or book reviews.</p> <p style="text-align: justify;">This journal with <strong>ISSN</strong>: <a href="http://u.lipi.go.id/1414646103"><strong><em>1693-0339</em></strong></a> (printed)&nbsp; <a href="http://u.lipi.go.id/1493689514"><strong><em>2579-8634</em></strong></a> (online) has been registered in the <a title="Crossref" href="https://search.crossref.org/?q=1693-0339&amp;from_ui=yes" target="_blank" rel="noopener"><strong>CrossRef system</strong></a> with Digital Object Identifier (<strong>DOI</strong>) prefix <strong>10.32491</strong>. JII has been also indexed/registered in Science and Technology Index <a href="http://sinta2.ristekdikti.go.id/journals/detail?id=763" target="_blank" rel="noopener"><strong>(SINTA)</strong></a>, <a href="https://scholar.google.co.id/citations?user=AHFKZ78AAAAJ&amp;hl=en" target="_blank" rel="noopener"><strong>Google Scholar</strong></a>, <strong><a href="http://garuda.ristekdikti.go.id/journal/view/14127" target="_blank" rel="noopener">GARUDA</a>, </strong>and<a href="http://isjd.pdii.lipi.go.id/index.php/Jurnal/get_jurnal_single/947" target="_blank" rel="noopener"><strong> ISJD</strong></a>.</p> Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society) en-US Jurnal Iktiologi Indonesia 1693-0339 <table> <tbody> <tr> <td valign="top" align="center">&nbsp;</td> <td colspan="2" valign="top"><strong>Authors who publish with this journal agree to the following terms:</strong></td> <td>&nbsp;</td> </tr> <tr> <td valign="top" align="center">&nbsp;</td> <td valign="top" align="center"><strong> a.</strong>) <strong> <br></strong></td> <td align="justify"><span class="show">Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a <a href="http://creativecommons.org/licenses/by-nc-sa/4.0/" target="_blank" rel="noopener">Creative Commons Attribution License</a> that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</span></td> <td>&nbsp;</td> </tr> <tr> <td valign="top" align="center">&nbsp;</td> <td valign="top" align="center"><strong> b.</strong>)</td> <td align="justify"><span class="show">Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</span></td> <td>&nbsp;</td> </tr> <tr> <td valign="top" align="center">&nbsp;</td> <td valign="top" align="center"><strong> c.</strong>)</td> <td align="justify"><span class="show">Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See <a href="http://opcit.eprints.org/oacitation-biblio.html" target="_new">The Effect of Open Access</a>).</span></td> <td>&nbsp;</td> </tr> <tr> <td valign="top" align="center">&nbsp;</td> <td valign="top" align="center">&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td valign="top" align="center">&nbsp;</td> <td colspan="2" valign="top" align="justify"><a href="http://creativecommons.org/licenses/by-nc-sa/4.0/" rel="license"><img style="border-width: 0;" src="https://i.creativecommons.org/l/by-nc-sa/4.0/88x31.png" alt="Creative Commons License"></a><br> Jurnal Iktiologi Indonesia by Masyarakat Iktiologi Indonesia (MII) is licensed under a <a href="http://creativecommons.org/licenses/by-nc-sa/4.0/" rel="license">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License</a>. Permissions beyond the scope of this license may be available at <a title="Jurnal Iktiologi Indonesia" href="https://jurnal-iktiologi.org">https://jurnal-iktiologi.org</a></td> <td>&nbsp;</td> </tr> </tbody> </table> <p>&nbsp;</p> Front Pages http://jurnal-iktiologi.org/index.php/jii/article/view/553 <p>.</p> . . ##submission.copyrightStatement## 2021-02-01 2021-02-01 21 1 Prevalence of endoparasites and histopathological evaluation of intestine in Nile tilapia, Oreochromis niloticus (Linnaeus, 1758) from aquaculture pond in Janti, Polanharjo District, Klaten Regency http://jurnal-iktiologi.org/index.php/jii/article/view/547 <p>Parasitic disease in aquaculture brings a great challenge to fish production. Appropriate control measure and treatment can be carried out if farmers are equipped with sufficient information on the existence of infection and its consequences on fish health. This study aimed to examine the prevalence of endoparasites in the intestine of Nile tilapia (<em>Oreochrois niloticus</em>) and any histological changes associated with the infection. Forty fishes were collected using purposive sampling technique at two location of aquaculture ponds in Janti village from September to December 2019. Each sampling size consisted of 10% of the total fish population in the pond. Identification of parasites was performed based on their morphology according to the standard method. Three genera of nematodes were found from fishes cultured at aquaculture ponds from local farmers, but not from that of PBIAT (Hatchery and Freshwater Fish Aquaculture). The endoparasites were identified as <em>Cichlidogyrus </em>sp., <em>Acanthocephalus </em>sp., and <em>Ceratomyxa</em> sp. with prevalence of 25% and intensity of 1.2%. Histological sections of the intestine of fish infected with these parasites showed alteration in the mucosa layers, such as edema and extension of the mucosa. Information on the presence of endoparasites and its effect on nile tilapia culture is important for fish farmers because it can be used as reference to control fish parasites effectively.</p> Putri Aji Sutarni Elisa Herawati Agung Budiharjo ##submission.copyrightStatement## https://creativecommons.org/licenses/by-nc-sa/4.0 2021-02-01 2021-02-01 21 1 1 10 10.32491/jii.v21i1.547 Effect of fermented rice bran concentration using Lactobacillus sp in artificial feed on growth performance and enzyme activity of tilapia Oreochromis niloticus (Linnaeus, 1758) http://jurnal-iktiologi.org/index.php/jii/article/view/548 <p>This study aims to determine the effect of the dose of fermented rice bran using <em>Lactobacillus</em> sp. on growth performance and enzyme activity in tilapia. This research was conducted in Sidenreng Rappang Regency. The test animal used was tilapia larvae measuring 1.17 g. The maintenance container is a tarp pool with a size of 1 m x 1 m x 1 m filled with fresh water as much as 85 L. The study was designed using a completely randomized design consisting of four treatments and three replications, thus there were 12 experimental units. The treatment was determined based on the dose of fermented rice bran using <em>Lactobacillus</em> sp. which differ, namely 0, 10, 15 and 20%. The test feed was given to tilapia larvae, which were stocked with 20 fish per container for 60 days of rearing. The specific growth rate data of tilapia were analysed using analysis of variance (ANOVA) and enzyme activity was analysed descriptively based on the viability of tilapia. The results showed that tilapia fed with 20% fermented rice bran had a significant effect on the specific growth rate, protease and amylase enzyme activity. The optimal dosage of fermented rice bran using <em>Lactobacillus</em> sp. is 15-20%.</p> Surianti Surianti Fitratul Muaddama Wahyudi Wahyudi Sri Wahyuni Firman ##submission.copyrightStatement## https://creativecommons.org/licenses/by-nc-sa/4.0 2021-02-01 2021-02-01 21 1 11 22 10.32491/jii.v21i1.548 Effect of periodic feed retrictions and refeeding on compensatory growth and blood physiology of of red tilapia (Oreochromis spp.) http://jurnal-iktiologi.org/index.php/jii/article/view/549 <p>Red tilapia is a one of the economically important fish species. In order to increase growth and feed efficiency, feed restriction strategies can be carried out. This study aims to determine the effect of periodic (weekly) restriction of feed on compensatory growth and physiological responses of red tilapia during the enlargement phase. The activity was carried out at the Fish Breeding Research Center for 4 months. The research method used a completely randomized design (CRD) 4 treatments with 3 replications, namely control (fish were fed daily), 1 (1 fasting day a week), 2 (2 fasting days a week), and 3 (3 fasting days&nbsp; a week). Fish rearing was conducted on the concrete tub measuring 2 x 1 x 0.8 m<sup>3</sup> with a stocking density of 10 fish m<sup>-2</sup>. During the maintenance period of 120 days the fish were fed satiation twice a day. The results showed significant differences (P &lt;0.05) in the value of weight growth, specific growth rate, daily growth and feed conversion ratio between control and other treatments, but not significantly different from treatment S1. The highest survival value was indicated by S1 treatment. The blood faal values of fish that were given feed restrictions consisting of red blood cells, white blood cells, hematocrit and hemoglobin showed that there was not significantly different than control fish (P&gt; 0.05), which was at normal values. Restriction of feed to 1 day a week showed partial compensatory growth with better feed efficiency than fish fed daily.</p> Adam Robisalmi Kartiawati Alipin Bambang Gunadi ##submission.copyrightStatement## https://creativecommons.org/licenses/by-nc-sa/4.0 2021-02-01 2021-02-01 21 1 23 38 10.32491/jii.v21i1.549 Length-weight relationship of bigeye scad, Selar crumenophthalmus (Bloch, 1793): Regular vs hierarchical bayesian methods http://jurnal-iktiologi.org/index.php/jii/article/view/550 <p>Fisheries management or conservation requires information on length-weight relationship (LWR) for the fishing regulation and biomass estimation. This study aims to assess LWR estimation using two methods, regular and Bayesian hierarchical approached for big-eye Scad (<em>Selar crumenophthalmus</em>). Samples of big eye Scad were collected at several fish landings around Ambon Island from March to August 2020. Length-weight relationship measurement to obtain the parameters of W = a<sub>*</sub>L<sup>b</sup> was tested using generalized linear model and t-test. The parameter b for monthly sampling was not significantly different (F = 0.77, df = 70, P = 0.89) and showed isometric growth b=3 (t = -1.13, df = 4, P = 0.32). Regular measurement resulted parameter log<sub>10</sub>(a) = -1.99 (±SD = 1.06) dan b = 3.06 (±SD = 0.084). Bayesian method produced parameter log<sub>10</sub>(a) = -2.07 (±SD = 0.2365) dan parameter b = 3.21 (±SD = 0.1497).&nbsp;Weight measurement from HB approach was significantly higher than the regular method (t = 1.65; df = 405; P &lt;0.0001), and might produce over-estimated of weight from length data. Discrepancy of these methods was overcome by combining all information of LWR to obtain the best estimation on LWR parameters.</p> BG Hutubessy VPY Likumahuwa JW Mosse ##submission.copyrightStatement## https://creativecommons.org/licenses/by-nc-sa/4.0 2021-02-01 2021-02-01 21 1 39 48 10.32491/jii.v21i1.550 Genetic characteristic of giant featherback, Chitala lopis (Bleeker, 1851) from Lampung and Kalimantan using COI Gene http://jurnal-iktiologi.org/index.php/jii/article/view/551 <p>DNA barcoding based on partial Cytochrome Oxidase subunit I (COI) gene in the mitochondrial has widely used in species identification and biodiversity studies. COI gene application is expected to obtain genetic characteristic, genetic variations and phylogeny of giant featherback. The aim of this research was to analyze genetic diversity of giant featherback <em>Chitala lopis</em> in Lampung and Kalimantan. To analyse genetic distance, <em>Kimura two parameter</em> (K2P) model was performed where to determine nucleotide variation &amp; polymorphism and also reconstructed of phylogenetic tree was used MEGA 7.0 software. Total nine individuals were obtained from three populations, i.e. Lampung, West Kalimantan and South Kalimantan. The results showed that giant featherback has 689 bp conserve, 18 bp variation, 13 bp parsimony-informative, and 2 bp singleton sites from 707 bp COI partial gene. The average within-species, in-group, and out-group based on K2P distances were 1.24%, 1.43% &amp; 1.58% (AP008922.1; KM213054.1), and 13.00% respectively. The Single Nucleotide Polymorphism (SNP) was obtaining from 13 SNP sites. West Kalimantan samples have two SNP (471 and 528 site). The South Kalimantan samples showed more specific nucleotides with nine SNP (120, 129, 144, 201, 306, 324, 474, 615 and 644). Based on genetic distance, the biggest difference was in the South Kalimantan sample (1.58%) compared with Lampung and West Kalimantan. The results of the K2P neighbour-joining phylogenetic tree reconstruction show that the South Kalimantan samples are in a different group. The West Kalimantan sample shows that it is closely related to the Lampung.</p> Alam Putra Persada Dedy Duryadi Solihin Ridwan Affandi ##submission.copyrightStatement## https://creativecommons.org/licenses/by-nc-sa/4.0 2021-02-01 2021-02-01 21 1 49 60 10.32491/jii.v21i1.551 Population diversity of striped snakehead, Channa striata (Bloch, 1793) from Bekasi, West Java and Barito Kuala, South Kalimantan using Cytochrome B gene http://jurnal-iktiologi.org/index.php/jii/article/view/552 <p><em>Channa striata </em>or striped snakehead is one of species from family Channidae that widely distributed from India, Southern China to Southeast Asia including Indonesia. It is a commercially important freshwater fish because of its taste and health benefits. High demand of this species trigger many efforts to increase its production, one of them is genetic monitoring. This study used complete <em>Cytochrome b </em>gene sequence of mtDNA for determining genetic variation in wild population of <em>C. striata</em>. <em>C. striata </em>samples (n=31) from two different locations in Indonesia were amplified and analyzed using MEGA ver 7.0. Sequences of 1140 bp complete cyt <em>b </em>gene revealed the presence of 2 haplotypes with 1137 bp conserved sites and 3 bp variable sites (0,26%). Overlapping haplotype was observed in samples from Bekasi, however there were only one haplotype in samples from South Borneo. Interspecies genetic were analysed with species from Genebank and showed that <em>C. striata </em>from Indonesia has close genetic relationships with <em>C. striata </em>from Borneo-Indonesia (MN057164.1) with genetic distance 0%. This study also revealed that <em>C. striata </em>from Indonesia were phylogenetically distinct with <em>C. striata </em>from China with 9,2%K2P genetic distance. Complete cyt <em>b</em> gene has been proven for assessing phylogenetic relationships and population diversity of <em>C. striata </em>in Indonesia.</p> Gita Kusuma Rahayu Dedy Duryadi Solihin Nurlisa A Butet ##submission.copyrightStatement## https://creativecommons.org/licenses/by-nc-sa/4.0 2021-02-01 2021-02-01 21 1 61 73 10.32491/jii.v21i1.552 Back Pages http://jurnal-iktiologi.org/index.php/jii/article/view/554 <p>.</p> . . ##submission.copyrightStatement## 2021-02-01 2021-02-01 21 1