<abstract xmlns="http://www.w3.org/1999/xhtml">Invasive Ponto-Caspian gobies (monkey goby <italic>Neogobius fluviatilis,</italic> round goby <italic>Neogobius melanostomus</italic> and bighead goby <italic>Ponticola kessleri)</italic> have recently caused dramatic changes in fish assemblage structure throughout European river systems. This review provides summary of recent research on their dietary habits, age and growth, phylogenetic lineages and gene diversity. The principal food of all three species is invertebrates, and more rarely fish, which depends on the type of habitat, part of the year, as well as the morphological characteristics of species. According to the von Bertalanffy growth model, size at age is specific for the region, but due to its disadvantages it is necessary to test other growth models. Phylogenetic analysis of monkey goby and round goby indicates separation between the Black Sea and the Caspian Sea haplotypes. The greatest genetic diversity is found among populations of the Black Sea, and the lowest among European invaders. The lack of molecular research on bighead goby requires further studies.</abstract>

City of Karlovac, Banjavčićeva 9, 47000 Karlovac,

Division of materials chemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb,

University of Zagreb, Faculty of Agriculture, Department of Fisheries, Beekeeping, Game management and Special Zoology, Svetošimunska 25, 10000 Zagreb,

The Review of Ecological and Genetic Research of Ponto-Caspian Gobies (Pisces, Gobiidae) in Europe

<abstract xmlns="http://www.w3.org/1999/xhtml">The distribution and occurrence of epibionts on the dorsal carapace, ventral carapace and chela of 325 specimens of <italic>Callinectes amnicola</italic> (De Rocheburne, 1883) (103.4 - 138.7 mm carapace width) from the Qua Iboe (QIRE) and Imo River (IRE) estuaries in southeast Nigeria was determined. The only ectosymbiont observed was cirriped barnacle, Chelonibia patula, mostly of smaller sizes (2.25 mm), infesting only 25-29% of intermoult crabs, more on females and in the Imo River estuary, with an average of four barnacles per crab, presupposing low level of epibiont-host interaction. There was no significant difference (P>0.05) in spatial distribution but epibionts were highest in the dry season in low salinity IRE (0.53‰) and in wet season in the medium-salinity QIRE (17.4‰). No public health risk has been reported among crab consumers in the study area. This study highlights epibiont-host interaction in the study area largely unknown for proper management of the fishery.</abstract>

Department of Fisheries and Aquatic Environmental Management, University of Uyo, Akwa Ibom,

Department of Animal Science and Fisheries, Faculty of Agriculture, Akwa Ibom State University, Obio, Akpa Campus, Oruk Anam, Akwa Ibom State,

Distribution and Size of Barnacle <italic>Chelonibia patula</italic> Fouling Blue Crab <italic>Callinectes amnicola</italic> in Southeast Nigeria

<abstract xmlns="http://www.w3.org/1999/xhtml"><italic>Emerita emeritus</italic> is an abundant species in Bengkulu coastal waters, but the knowledge of its reproductive biology is poor. The present study was conducted to elucidate the reproductive aspects of ovigerous female <italic>E. emeritus,</italic> including fecundity, egg volume and reproductive output. This study was conducted between January 2015 and January 2016 in Bengkulu coastal waters, Indonesia. Samples were collected manually using shovels and hands. The results showed that ovigerous females occurred every month. Fecundity increased significantly in ovigerous females proportional to the size. No correlation was shown between sea surface temperature and egg production. Fecundity and reproductive output decreased throughout the embryonic development.</abstract>

Master Program in Animal Biological Science, Department of Biology, Faculty of Mathematics and Natural Science, Bogor Agricultural University, Kampus IPB Darmaga, Bogor 16680,

Department of Biology, Faculty of Mathematics and Natural Science, Bogor Agricultural University, Kampus IPB Darmaga, Bogor 16680,

Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Bogor Agricultural University, Kampus IPB Darmaga, Bogor 16680,

Reproductive Biology of Ovigerous Female <italic>Emerita emeritus</italic> (Crustacea, Decapoda) in Bengkulu Coastal Waters, Indonesia: Egg Production and Reproductive Output

<abstract xmlns="http://www.w3.org/1999/xhtml">Cannibalism is an important characteristic of African catfish that significantly reduces the number of stocked fish at harvest. This study evaluates the effect of reciprocal hybridization of <italic>Clarias batrachus</italic> and <italic>Clarias gariepinus</italic> on cannibalism and growth performance of their progenies in an indoor rearing system. The result obtained reveals excellent performance of hybrids of <italic>C. gariepinus</italic> ♂ and <italic>C. batrachus</italic> ♀ over the purebreds in terms of growth. However, the reciprocal hybrids between <italic>C. gariepinus</italic> ♀ and <italic>C. batrachus</italic> ♂ all died few hours after hatching. Cannibalism was significantly reduced in the crosses between <italic>C. gariepinus</italic> ♂ and <italic>C. batrachus</italic> ♀ with 100% survival after five months of culture. Hence, this could be exploited in commercial production of catfish to reduce cannibalism and increase harvest size of fish farmers.</abstract>

Cannibalism and Performance Evaluation of Hybrids between <italic>Clarias batrachus</italic> and <italic>Clarias gariepinus</italic>

<abstract xmlns="http://www.w3.org/1999/xhtml">Climate changes constitute the greatest challenge of this century due to the modifications they cause in weather and environmental conditions, and thus affecting the social and economic dynamics at multiple levels. Because all invertebrates and fish used for human consumption are poikilotherms, they are very sensitive to modifications in the environment, namely temperature and levels of oxygen. Phenomena like temperature rising, acidification, ocean stratification and changes in salinity are already perceptible and susceptible of causing severe consequences in aquatic ecosystems. Falling productivity, species migration and localized extinctions, as well as conflict over the use of scarce resources and increased risks associated with more extreme climatic events are among the possible consequences. Increased climate variability justifies a focus on the design and promotion of strategies to control the inherent risk and increase the resilience of marine and freshwater systems that strongly affect the livelihoods of millions of human beings worldwide. A multidimensional and holistic concept for the sustainable management of maritime and marine resources is indissociable from the unequivocal evidence of climate changes. Raising awareness of public in general and ocean stakeholders for the relevance of the topic at hand are assumed as key dimensions with the present article.</abstract>

Fisheries and Climate Change: Inevitability or Prophylaxis? Contributing to a Necessary Debate

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Croatian Journal of Fisheries

 The Croatian Journal of Fisheries was established in 1938 and today possesses a long-term tradition of publishing papers that deal with both freshwater and marine fisheries. Areas covered by the Journal include ichthyology, aquaculture, ecology and diseases of fish and other aquatic organisms, problems of open waters and other topics related to the fisheries field.  Prior to publication, articles pass through rigorous review by senior scientists from around the world. The Journal features articles that reflect original research, interpretative content and subject matter of interest to the fisheries profession. The journal owner Faculty of Agriculture (FAZ) University of Zagreb, founded in 1919, is the leading higher education and scientific institution in the field of agriculture and related sciences in the Republic of Croatia, occupying an important position within the country's educational, scientific and research system. The FAZ organization is based on 28 departments with 417 members of the staff and 6 experimental stations.  The Croatian Journal of Fisheries (CJF) is committed to real and immediate open access for academic work. All of the CJF’s articles are free to access immediately from the date of publication. There are no author charges (APCs) prior to publication, and no charge for any reader to download articles and reviews for their own scholarly use. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, without asking prior permission from the publisher or the author (see Copyright). This is in accordance with the BOAI definition of open access. To facilitate this the CJF depends upon the financial underwriting provided by the Croatian Ministry of Science, Education and Sport, Faculty of Agriculture, Croatian Chamber of Economy, journal subscribers, the goodwill of its editorial team and the continuing support of its network of peer reviewers.  Copyright:  Commercial distribution of journal articles in any form (printed or digital) is strictly forbidden. All published content in CJF is licensed under Creative commons Attribution-NoDerivs 3.0 licence. Authors of articles published in CJF retain the copyright of their articles and they are free to reproduce and disseminate their work under the terms of the Creative commons Attribution which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.  Why subscribe and read:  CJF is an English-language (additional abstract in Croatian language) peer-reviewed quarterly journal, publishing original research papers from the wide area of fisheries. It contains editorials, original scientific papers, preliminary and short communications, review papers, professional papers and supplements to fishing profession authored by researchers from all over the world, who appreciate fast, fair and constructive peer review provided by experts in the field of our profile. CJF reviewers have prompt and rapid response to the authors according to the schedule. At the time of paper submission, author will get unique paper ID and can check their paper status online. Also, CJF has simple and standard Template which can ease the submission procedure.  Why submit:  By submitting manuscripts in Croatian Journal of Fisheries authors can rely on fast peer review process and thorough editing by sector experts. CJF changed the Editorial Board to the Associate Editors system. In this way papers are more rigorously reviewed and the reviewing process is much faster. Consequently, the published papers are of much better quality.  Rejection rate:   30%   Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 

Croatian Journal of Fisheries

Volume 74 (2016): Issue 3 (September 2016)

The Review of Ecological and Genetic Research of Ponto-Caspian Gobies (Pisces, Gobiidae) in Europe

Distribution and Size of Barnacle Chelonibia patula Fouling Blue Crab Callinectes amnicola in Southeast Nigeria

Reproductive Biology of Ovigerous Female Emerita emeritus (Crustacea, Decapoda) in Bengkulu Coastal Waters, Indonesia: Egg Production and Reproductive Output

Cannibalism and Performance Evaluation of Hybrids between Clarias batrachus and Clarias gariepinus

Fisheries and Climate Change: Inevitability or Prophylaxis? Contributing to a Necessary Debate

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