Escape, discard and landing probability of Nephrops norvegicus in the Mediterranean Sea creel fishery

Size selection in creel fishery consists of two processes: the first taking place in the creel on the seabed and the second made by the fisher on the vessel. However, no study has ever considered both processes when assessing the size selection in creel fisheries. This study presents a framework for including both and demonstrates it to predict the effect of mesh size and shape on the creel fishery targeting the Norway lobster (Nephrops norvegicus) in the Mediterranean Sea. For this specific fishery, we demonstrate that both processes play a role in the overall size selection. Furthermore, we predict an optimal creel mesh size, which potentially eliminates the second process taking place on the vessel, while maintaining high efficiency for the first process on the seabed for the targeted sizes of Nephrops. The approach here presented can be also applied to other creel fisheries

Revealing the Shamefaced Crab Calappa granulata (Crustacea: Brachyura) from the Adriatic Sea, Northern Basin of the Mediterranean

This study presents the first data on morphometry, length–weight relationship, diet, reproductive biology, epibionts and genetic identity of the shamefaced crab Calappa granulata from the central eastern Adriatic Sea. A total of 92 crabs were collected during 2011, 2014 and 2015, of which 64 were females and 28 were males. Overall, 11 morphometric characteristics were measured. Carapace length of sampled individuals ranged from 48.46 to 76.09 mm, and body weight from 47.06 to 221.39 g. The length–weight relationship showed negative allometry for males and isometric growth for females. Analysis of the stomach content revealed the crab’s preference for crustaceans (20.28%) and cephalopods (10.58%), less for fish (3.4%) and shellfish (0.28%). Size at first sexual maturity (CL50%) of 59.25 and 66.92 mm was estimated for males and females, respectively. Epibiotic serpulid polychaetes were recorded on the crab exoskeleton with an overall prevalence of 29.3%. Analyses of a partial sequence of mtCOI showed high haplotype (Hd = 0.964) and low nucleotide diversity (π = 0.00598). Phylogenetic inference and estimation of population differentiation (FST = 0.013, p = 0.271) with publicly available Mediterranean sequences currently imply one homogenous population unit. To the best of our knowledge, these are the first nucleotide sequences of C. granulata from the Adriatic Sea made publicly available.publishedVersio

Influence of soak time on catch performance of commercial creels targeting Norway lobster (Nephrops norvegicus) in the Mediterranean Sea

Source at https://doi.org/10.1051/alr/2017035 .Creel catch performance is known to be affected by the soak time in many fisheries. If creels maintained their efficiency over longer periods, increase in soak time should lead to proportional increase in catch quantity. However, the exact shape of this relationship is unknown for creel fisheries targeting Norway lobster (Nephrops norvegicus). If it was known fishermen could adjust their fishing strategy accordingly and maximize their net earnings. We compared catch performance of creels targeting Norway lobster soaked for one and two days in the Adriatic Sea. Results were obtained for three crustacean species, Norway lobster (N. norvegicus), mantis shrimp (Squilla mantis), and blue-leg swimming crab (Liocarcinus depurator) and two fish species, poor cod (Trisopterus minutus) and blotched picarel (Spicara flexuosa). Doubling the soak time from one to two days did not double the catches and for Norway lobster no increase was found. For the other crustaceans, a slight but not significant increase was estimated. Catches of blotched picarel were significantly lower for the longer soak time, while the results were inconclusive for the poor cod

Response of sugar beet to fertilizaton with pelleted organic and mineral fertilizers

Cilj istraživanja bio je utvrditi utjecaj gnojidbe peletiranim organskim gnojivima (Phenix i Bio-rex) i mineralnim gnojivima te njihovom kombinacijom na prinos i tehnološku kvalitetu korijena šećerne repe. Istraživanja su provedena na antropogeniziranom eutrično smeđem tlu, na slabo zamočvarenoj ilovači u Zagrebu od 2012. – 2014. godine. U istraživanje je bilo uključeno šest varijanti gnojidbe: kontrola – bez gnojidbe; Phenix 0,6 t/ha; Bio-rex 1,0 t/ha; mineralno gnojivo (NPK = 113:190:270), mineralno gnojivo (NPK = 83:160:240) + Phenix 0,6 t/ha i mineralno gnojivo (NPK = 83:160:240) + Bio-rex 1,0 t/ha. Na prinos i tehnološku kvalitetu korijena šećerne repe značajno su utjecale vremenske prilike, prvenstveno količina i raspored oborina. Značajno veći prinos korijena i šećera postignut je primjenom mineralnih gnojiva te kombinacijom mineralnih i organskih gnojiva u odnosu na kontrolu i primjenu samo organskih gnojiva. Istraživane varijante gnojidbe nisu imale značajan utjecaj na sadržaj šećera u korijenu, ali je najveće iskorištenje na digestiju ostvareno primjenom samo organskih gnojiva Phenix i Bio-rex.The aim of the research was to determine the influence of fertilization with pelleted organic fertilizers (Phenix and Bio-rex) and mineral fertilizers and its combination on yield and technological quality of sugar beet root. Investigations were carried out on antropogenized eutric brown soil, on slightly luvic loam in Zagreb during 2012 – 2014. The research included six fertilization variants: control – unfertilized; Phenix 0.6 t/ha; Bio-rex 1.0 t/ha; mineral fertilizer (NPK = 113:190:270); mineral fertilizer (NPK = 83:160:240) + Phenix 0.6 t/ha and mineral fertilizer (NPK = 83:160:240) + Bio-rex 1.0 t/ha. Weather conditions, especially precipitation amount and distribution, had significant influence on yield and technological quality of sugar beet root. Significantly higher root and sugar yield were obtained with mineral fertilizers and combination of mineral and organic fertilizers. Fertilization with organic and mineral fertilizers had no effect on sugar content in root but the highest sugar utilization of digestion was achieved applying the organic fertilizers Phenix and Bio-re

The role of learning in entrepreneurship

U prvom dijelu članka autorice prikazuju pregled trendova u poduzetničkom obrazovanju s fokusom na europska iskustva. Prikazani su trendovi na sveučilištima Velike Britanije, a zatim je uočeno prelijevanje tih iskustava na europsku razinu preko funkcioniranja europskih projekata. Predstavljamo i aktivnosti Fakulteta organizacije i informatike Varaždin, na podizanju svijesti o potrebi za poduzetničkim znanjima edukacijom u poduzetništvu. Pregled relevantne literature već dulji niz godina pokazuje važnost poduzetništva za gospodarski rast i napredak. Pri tome se među ostalim čimbenicima razvoja poduzetništva naglasak stavlja i na poduzetničku edukaciju. Shodno tome slijedi prikaz razvoja i aktivnosti na sveučilišnim studijima poduzetništva (PDS + DS) koji se održavaju u Varaždinu. Jedan aspekt je obrazovanje s naglascima na poduzetničke aktivnosti što FOI postiže kroz zajednički preddiplomski studij Ekonomika poduzetništva koji se izvodi u suradnji s Ekonomskim fakultetom u Zagrebu. Studij je prvi takav zajednički projekt dviju sastavnica Sveučilišta u Zagrebu. Zbog iskazanog interesa studenata od akademske godine 2010/2011 FOI samostalno izvodi diplomski studij kako bi studentima završenog preddiplomskog studija omogućio nastavak studiranja i stjecanje konceptualnih znanja za rješavanje složenih problema u poduzetništvu.In the first part of the article, the authors present an overview of trends in entrepreneurial education with a focus on the European experience. First, the authors show the trends in the Universities of Great Britain, whose experiences have been spilt over at the European level through functioning of European projects. The authors also present the activities of the Faculty of Organization and Informatics (FOI) Varaždin on raising awareness about the need for entrepreneurial skills through education in entrepreneurship. Review of relevant literature demonstrates the importance of entrepreneurship for economic growth and prosperity. Among other factors of entrepreneurship development, the emphasis is on entrepreneurship education. Accordingly, in the second part of the article, the authors present development and activities on university studies of entrepreneurship (Undergraduate + Graduate study), that is held in Varaždin. One aspect is education with emphasis on entrepreneurial activities, which FOI achieves through a joint undergraduate study in collaboration with the Faculty of Economics and Business – Zagreb. This study is the first such a joint project of two components of University of Zagreb. Due to the students’ interest, from the academic year 2010/2011, FOI has also independently started graduate study of entrepreneurship. This study program enables the continuation for the undergraduate students in gaining of conceptual knowledge for solving complex problems in the entrepreneurship

Mesh sticking probability in fishing gear selectivity: Methodology and case study on Norway lobster (Nephrops norvegicus) and mantis shrimp (Squilla mantis) in the Mediterranean Sea creel fishery

Fish or crustaceans stuck in the fishing gear meshes can lead to operational problems in some fisheries and thereby affect theeconomic gain. However, mesh sticking probability has never been formally quantified as a part of the estimation of fishing gearsize selectivity. Therefore, this study developed a size selection model and estimation procedure that, besides the size dependentretention and escape probabilities, includes the size dependent mesh sticking probability. The new method was applied to quantify the size dependent retention, sticking and escape probabilities for mantis shrimp (Squilla mantis) and Norway lobster (Nephrops norvegicus) in creels with 41 mm square mesh netting. The mesh sticking probability was found to display a bell-shaped curvature with a maximum value for a specific carapace length and decreasing probabilities for both smaller and bigger individuals. For mantis shrimp the maximum sticking probability was found for 32.5 mm carapace length with a value at 13.5%, while 63.1% and 23.4% of that size were respectively retained inside the creels and escaped. For Norway lobster the maximum sticking probabilitywas 2% and occurred for 34.0 mm carapace length. The method and estimation procedure presented in this study might be applicable for quantifying mesh sticking probability as an integral part of future fishing gear size selectivity studies on other speciesand fisheries

YIELD AND YIELD COMPONENTS OF INVESTIGATED RAPESEED HYBRIDS AND CULTIVARS

U cilju evaluacije novih hibrida i sorti uljane repice, provedeno je istraživanje na pokusnome polju Agronomskoga fakulteta u Zagrebu tijekom tri vegetacijske godine. U istraživanje je bilo uključeno 11 hibrida i 5 sorti uljane repice iz 5 sjemenarskih kuća. Istraživani hibridi i sorte uljane repice međusobno su se značajno razlikovali po ostvarenome prinosu sjemena i ulja, sadržaju ulja i komponentama prinosa (broj sjemenki po komuški i masa 1000 sjemenki). Međutim, veliki broj hibrida i sorata ostvario je istovjetne rezultate, jer su razlike između njih u istraživanim svojstvima bile unutar statistički dopuštenog odstupanja. Na temelju tih istraživanja, prema ostvarenim prinosima sjemena i ulja mogu se izdvojiti hibridi Traviata i CWH 119, a prema visokome sadržaju ulja u sjemenu hibridi CWH 119 i PR46W15 te sorta Ricco. Hibridi s većim brojem komušaka po biljci ostvarili su i veći prinos sjemena.To evaluate new winter rapeseed hybrids and cultivars, investigations were conducted at the experimental field of the Faculty of Agriculture, University of Zagreb, in the period 2009/10 - 2011/12. The trial involved 11 hybrids and 5 cultivars rapeseed of 5 seed producers selling seed in Croatia. The studied rapeseed hybrids and cultivars differed significantly in seed and oil yields, oil content and yield components (seed number per silique and 1000 seed weight). However, a number of hybrids rendered identical results, since the differences in the investigated properties were within statistically allowable deviation. Hybrids Traviata and CWH 119 can be singled out based on the achieved seed and oil yields, and the cultivar Ricco and hybrids CWH 119 and PR46W15 for their high oil content in seed. Hybrids with a larger silique number per plant also achieved a higher seed yield

Primerjava linearne in nelinearne seizmične interakcijske analize predor-tla

In order to study the effects of a seismically induced tunnel–ground interaction, two-dimensional numerical analyses are performed using the sofware ANSYS. The study employs a coupled beam–spring model subjected to earthquake loading that is simulated under pure shear conditions and determined by a free-field ground-response analysis using the code EERA. The properties of the soil material are considered as both linear and nonlinear. The results obtained by linear dynamic analyses are compared with state-of-practice analytical elastic solutions. A comparison of the results of both linear and nonlinear analyses is also performed, and significant differences, as well as important factors influencing the tunnel–ground interaction for both cases, are evaluated.Članek preučuje potresne učinke na interakcijo predor-tla. Za to so bile izvedene dvodimenzionalne numerične analize s pomočjo programa ANSYS. V študiji je uporabljen potresno obremenjen združeni model nosilec-vzmet, ki je simuliran pod čistimi strižnimi pogoji in določen z analizo odziva tal s prostim poljem z uporabo programske kode EERA. Lastnosti materiala tal so obravnavane tako linearno kot nelinearno. Rezultati, dobljeni z linearnimi dinamičnimi analizami so primerjani z v praksi znanimi analitičnimi elastičnimi rešitvami. Primerjani so tudi rezultati linearnih in nelinearnih analiz, za oba primera so ovrednotene pomembne razlike ter pomembni dejavniki, ki vplivajo na interakcijo predor-tla

Root yield and quality of investigated sugar beet hybrids in northwest Croatia in the period from 2010 to 2013

U cilju dobivanja pouzdanih informacija o prinosu i kvaliteti korijena novih hibrida šećerne repe, postavljeni su sortni mikro pokusi na pokusnome polju Agronomskoga fakulteta u Zagrebu od 2010. do 2013. godine. U istraživanje je bio uključen ukupno 51 hibrid šećerne repe, koji su vlasništvo pet selekcijskih kuća koje plasiraju sjeme na hrvatskome tržištu. Istraživani hibridi značajno su se razlikovali po prinosu korijena i šećera te sadržaju šećera u korijenu u svim godinama istraživanja, osim u sušnoj 2011. godini. Međutim, veliki broj hibrida ostvario je po vrijednosti isti rezultat, jer su razlike unutar statistički dopuštenog odstupanja. U 2010. godini najveći prinos korijena (107,5 t/ha) i najveći tehnološki prinos šećera (13,5 t/ha) ostvario je hibrid Elvis. U ovoj godini najveći sadržaj šećera (15,68%) ostvario je hibrid Markus. U 2012. godini najveći prinos korijena (86,4 t/ha), kao i najveći prinos šećera (12,0 t/ha), ostvario je hibrid Serenada KWS, a najveći sadržaj šećera u korijenu (17,37%) imao je hibrid Denisa KWS. U 2013. godini najveći prinos korijena (90,2 t/ha) i najveći prinos šećera (10,8 t/ha) ostvario je hibrid Terranova KWS. U ovoj godini najveći sadržaj šećera u korijenu (15,23%) ostvario je hibrid Pharaon.In order to obtain reliable information on yield and root quality of new sugar beet hybrids, the micro varietal trials were set up on the experimental field of the Faculty of Agriculture at the University of Zagreb in the period from 2010 to 2013. The study included a total of 51 sugar beet hybrids owned by five breeding companies present in the Croatian market. There were significant differences among investigated hybrids in root and sugar yield and sugar content in the roots in all years of research, except in the dry 2011. However, a large number of hybrids achieved statistically equal values because the differences were within the statistical tolerance. In 2010, the highest root yield (107.5 t/ha) and the highest technological sugar yield (13.5 t/ha) were achieved by the hybrid Elvis. That year, the largest sugar content (15.68%) was achieved by the hybrid Markus. In 2012, the highest root yield (86.4 t/ha), and the highest sugar yield (12.0 t/ha) were achieved by the hybrid Serenada KWS. The largest root sugar content (17.37%) was achieved by the hybrid Denisa KWS. In 2013, the highest root yield (90.2 t/ha) and the highest sugar yield (10.8 t/ha) were achieved by the hybrid Terranova KWS. That year, the largest sugar content in root (15.23%) was achieved by the hybrid Pharaon

COLONIC MUCO-SUBMUCOSAL ELONGATED POLYP: A CASE REPORT AND LITERATURE REVIEW

U članku prikazujemo bolesnika s izduženim sluznično-podsluzničnim polipom debelog crijeva (engl.colonic mucosal-submucosal elongated polyp, CMSEP). Radi se o recentno opisanoj vrsti polipa koja se ne uklapa u tradicionalnu podjelu kolorektalnih polipa. CMSEP je makroskopski karakteriziran duguljastim, crvolikim izgledom s pokrovom od normalne sluznice debelog crijeva, a mikroskopski sadržava mukozu i ekspandiranu submukozu s dilatiranim krvnim i limfnim žilama. Prema našim saznanjima radi se o prvom slučaju takve vrste u našoj sredini, a s obzirom na očekivani porast kolonoskopija u sklopu Nacionalnog programa za rano otkrivanje kolorektalnog karcinoma, namjeravamo upoznati gastrointestinalne patologe i endoskopičare s ovim rijetkim fenomenom.Recently a new entity has been described – a colonic muco-submucosal elongated polyp (CMSEP) – that did not fall into traditional classification of colorectal polyps. The CMSEP is endoscopically characterised by elongated, worm-like appearance with a normal overlying mucosa. Histologic characteristics of the CMSEP comprise mucosa and expanded submucosa with dilated vasculature and lymphatics. Herein, we report a case of CMSEP, that to the best of our knowledge, has not been previously described in our literature. With regard to the on-going National colorectal cancer screening programme, our intention is to draw attention of gastrointestinal pathologists and endoscopists to this distinctive and very rare phenomenon