A review of length-weight relationships of fishes from Greek marine waters

This paper presents 649 length-weight relationships gathered from literature pertaining to 83 fish species, belonging to 34 families, throughout Greek marine waters. The value of the slope b ranged from 1.667 for Cepola macrophthalma to 3.707 for Mullus barbatus. The mean value of b was 2.989 (SD=0.339) and did not differ significantly from 3(t-test, p<0.05). The median value of b was 3.058 and 50% of the b values ranged between 2.900 and 3.186

Understanding Consumer’s Attitude on Fish Quality and Marketing Aspects in the Greek Market

During the last decade the Greek fish market experienced significant changes affecting both the supply and the demand of fish. Fisheries have faced significant problems, such as overfishing and low productivity. Similarly, the undoubtedly rapid development of the aquaculture sector was followed by an intense competition and low prices for fish. On the other hand, the traditional Greek consumer’s attitude on fish products is rapidly changing mainly due to socio-economic factors. Within this framework, the consumers play a critical role that of being the link between supply and demand. Thus, the analysis of the consumer’s attitude concerning basic quality and marketing aspects on marine captured and farmed fish market could be a useful tool towards a more rational organization of the distribution roots. For this purpose, research was carried out and a total of 395 consumers, randomly selected in terms of demographic and socio-economic dispersion criteria, were asked to fill in a questionnaire covering aspects of fish marketing and quality aspects, such as consumers’ “sensitivity on fish freshness issuesâ€, “sensitivity on marketing issues†and “reasons for choosing fish as food†in their family. regarding Data were statistically analyzed using categorical regression in an effort to identify the effect of basic classification variables of consumers’ origin and socioeconomic status into their sensitivity on fish quality and marketing aspectFish market, consumer survey, fish marketing issues, categorical regression, Consumer/Household Economics, Marketing,

Zdravlje i bezbednost zaposlenih u sektoru gajenja morskih riba u grčkoj: inicijalni izvestaj o povredama na radu i zdravstvenom stanju

U ovom radu predstavljene su analize povreda na radu u industriji gajenja morskih riba. Ove analize služe kao osnova za dalje unapređenje zdravlja i bezbednosnih uslova rada. Ovaj inicijalni pristup navodi, izmedju ostalog, indikatore, kao što je učestalost nezgoda tokom sezone i kako one utiču na proizvodnju. LEONARDO DA VINCI program Evropske Unije je finansijski podržao ovaj projekat (Izvršilac za INTRANEMMA projekat, Ugovor br. 2010-1-GR1-LEO 05-03986). Akvakultura u istočnom delu Mediterana se jako brzo razvila u proteklih 20 godina, što je dovelo do povećanog broja ribnjaka, kao i do povećane proizvodnje koja je dostigla 100000 t (u 2001. godini). Takođe, očekuje se trostruki porast proizvonje u bliskoj budućnosti. Ova stopa rasta povećava broj povreda na radu u industriji gajenja. Grčka je najveći proizvođač morskih riba u Mediteranu gde ukupan broj radnika dostize skoro 0.2% ukupne radne snage u Grčkoj, od kojih je 20% zaposljeno u marinskom sektoru, naročito na farmama riba sa kaveznim sistemima. U ovoj studiji razmatran je ukupan broj radnika u oblasti akvakulture u toku jedne godine, iako je, između ostalog, broj radnika u marinskom sektoru sezonski promenljiv. Izveštaji o povredama na radu u ovom sektoru su već dati u godišnjim izveštajima koje je objavila Grčko Društvo za Ispitivanje Rada (SEPE). Analiza trenutne studije zasnovana je na podacima iz 2009-2011 datim u ESAW 2001 (Eurostat, Evropska statistika za nezgode na poslu). Do 2009. godine, bilo je teško dobiti rezultate analiza o nezgodama na radu u akvakulturi i ribarstvu, zato što su Grčke vlasti davale izveštaj o tim podacima zajedno sa podacima o preradi i pakovanju poljoprivrednih i ribljih proizvoda. Iako su nezgode kao i bolesti na radu najvažniji za opisivanje i ustanovljavanje uslova za zdravlje i bezbednost na radu, ne možemo dobiti pouzdane rezulate za ovaj period. Jedini način na koji možemo da stvorimo sliku o ovom sektoru za ovaj izveštaj je da se oslonimo na međunarodne publikacije. U ove nezgode i bolesti spadaju mišićno skeletni poremećaji, efekti UV radijacije, itd. Dalje analize radi dobijanja podataka o nezgodama na radu su već isplanirane. One ce uključiti više faktora koji utiču na uslove pod kojima se nesreće dešavaju. Na primer, slučajevi povreda na radu vezani za klizanje i spoticanje (39%), rukovanje (5%) i objekte koji su pali (16%) nisu sasvim precizni zbog nedostatka izvestaja. Ipak, podaci koje imamo ukazuju da su ove povrede učestalije u ovom sektoru nego u drugim sektorima u Grčkoj (na primer 18%, 23% and 10%, za svaku od ovih nesreca u 2011. godini). Zbog ovoga možemo zaključiti da diskrepance u izveštajima o nesrećama na radu u sektoru akvakulture mogu da dovedu do pogrešnih tumačenja uslova za zdravlje i bezbednost

Consumer Attitude Towards Shellfish In The Greek Market: A Pilot Study

During the last decade, the Greek shellfish industry has experienced significant changes affecting both the market demand and the availability of the end products. Although, shellfish and seafood in general have been promoted as healthy food by marketing boards and private seafood companies in many countries all over the world, no attention has been paid so far to analysing the Greek consumer’s purchasing behaviour and attitudes towards the shellfish market. This paper presents the results of the first survey in this field of research, which was carried out in northern Greece (area of Katerini and Greater Thessaloniki) from January to March 2002. A randomly selected sample of 400 consumers filled in a questionnaire, which covered basic marketing aspects of shellfish consumption such as choice, purchase, reasons for consuming shellfish, confidence in shellfish hygiene certification, media influence, etc. Data analysis includes descriptive statistics, as well as chi-square (― 2 ) tests (crosstabulation) to examine possible relations between consumers’ demographic and socio-economic characteristics and shellfish marketing aspects. Analyses of the results have shown that the majority of Greek consumers prefer the exploitable to cultured shellfish and in general do not eat shellfish often. They prefer the traditional fish shops for purchasing shellfish and consume them mainly in summer. The strongest reason to buy shellfish is their taste, while freshness is considered as the most important criterion when deciding to buy shellfish. Moreover, the vast majority of the consumers prefer a certification of quality, trust the confirmation provided by the veterinary authorities, but do not prefer ready-to-eat shellfish. Results revealed that consumers’ behaviour and attitudes vary considerably according to their demographic and socio-economic characteristics. The results of this study could prove to be helpful for decision makers towards a more rational planning of production and improvement of distributing roots, which in turn would improve product quality and promote shellfish consumption

PORTRAYING TRAWL FISHERY IN ALBANIAN WATERS: CASE STUDY FROM THE SARANDË AREA (SOUTHERN ALBANIA)

Ova studija pruža vrijedan uvid u ribolov kočama koji se odvija u vodama južne Albanije putem integriranog pristupa koji se temelji na visokofrekventnom nadzoru kočarskog broda i intervjuima s lokalnim ribarima. Multivarijantne analize sastava iskrcajnih vrsta ili ekonomskog prihoda skupina utvrdile su da su se grupe razlikovale ovisno o poboljšanom iskrcaju u ribolovu i gospodarskoj učinkovitosti. Većinu ulova činile su razne pridnene te male i srednje velike pelagične vrste, što potvrđuje multispecijsku prirodu Jadranskog mora. Ciljne vrste identificirane u smislu ulova i prihoda podrazumijevaju sustavnu taktiku tijekom dugog vremenskog razdoblja, a slučajni ulovi jednako su važni u smislu ukupne sličnosti skupine. Identifikacija ciljnih skupina vrsta može biti korisna u procjeni trenutnih shema stratifikacije uzorkovanja.The current study provides valuable insight into the trawl fishery operating in southern Albanian waters via an integrated approach based on high-frequency monitoring onboard trawl vessels and on-site interviews with local fishers. Multivariate analyses of the composition of species landings or economic revenue revealed groups that, depending on the group, were distinguished by improved fisheries landings and economic efficiency. The majority of the catch consisted of a variety of demersal and small- and medium-sized pelagic species, confirming the Adriatic Sea\u27s multispecies nature. Target species identified in terms of catches and revenue imply a systematic tactic over a long period of time, and incidental catches are equally important in terms of overall group similarity. The identification of target species groups may be useful in assessing the current sampling stratification schemes

Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)

Parallel fishing trials with 0.30 mm diameter monofilament gill nets and longlines using small hooks were carried out in the Algarve (southern Portugal) over a one-year period, 1997-1998, with the objective of comparing species composition, catch rates, discards and size ranges. Four hook sizes of 'Mustad' brand, round bent, flatted sea hooks (numbers 15, 13, 12 and 11) and four mesh sizes of 25, 30, 35 and 40 mm (nominal bar length) of gill nets were used in the trials. Overall, 84 species were caught, with gill nets taking 71 species and longlines 54 species and with 41 species caught by both gears. The amount of discarding was higher for gill nets than for longlines. The catch species composition differed between the two gears, with the commercially valuable sea breams dominating the longline catches whereas small pelagics were relatively more important in the gill nets. Multivariate analysis showed a clear separation between the different sizes of the two gears both in terms of numbers and weights per species. Algarve gill netters and longliners fish the same species assemblage on the same fishing grounds, but have clearly different impacts in terms of catch species composition, catch rates and sizes. This information will be useful for the improved management of these small-scale, multi-species, multi-gear fisheries, where different gears compete for scarce resources. In particular this study provides a basis for a more rational allocation of licenses and control of fishing effort

Razvoj grčkog ribarstva tijekom razdoblja 1928. -1939.

In the present study, Greek fisheries landings were extended back to 1928, for the first time, from data derived by the General Statistical Service of Greece during the 1928-1939 period. In particular, we: (a) present the annual fisheries landings for all species combined, fishing effort for all gear-types combined and species-specific landings during 1928-1939, (b) re-allocate the spatial resolution of landings during 1928-1939 to that during 1964-2007, and (c) compare the landings for different periods during 1928-2007. Results showed that during 1928-1939, landings and effort generally increased. The time series of all species landings exhibited a strong between-year variability, with 23 out of 40 species displaying a significant increasing trend. The analysis of fisheries landings over time (1928-2007) displayed four distinct patterns corresponding to four phases of Greek fisheries development: (1) a gradual increase during 1928-1949 (pre-development phase of fisheries), (2) a steeper increase during 1950-1969 (growth phase), (3) a much steeper linear increase during 1970-1994 (fully tο over-exploited phase) and (4) a declining trend during 1995-2007 (collapse phase). These phases coincided chronologically with significant socio-economic and political events that took place in Greece since 1928.U ovom radu, po prvi put, je iznesen status ulova u grčkom ribarstvu i to u razdoblju od 1928. do 1939. godine prema podacima iz Opće statističke službe u Grčkoj. Konkretno, izneseno je slijedeće: a) predstavljen je godišnji ulov ribarstva za sve vrste zajedno, ribolovni napor za sve vrste alata u kombinaciji i vrste specifičnih ulova tijekom razdoblja 1928.-1939., b) ponovno dodijeljive prostorne rezolucije ulova tijekom 1928.-1939., te tijekom 1964.-2007., i c) uspoređen je ulov za različita razdoblja tijekom 1928.-2007. Rezultati su pokazali da su se tijekom 1928.-1939., ulov i ribolovni napor općenito povećali. Vremenske serije svih vrsta ulova su bile izložene jakim međugodišnjim varijabilnostima, te od 40 vrsta njih 23 su pokazale značajan trend rasta. Analiza ukupnog ulova ribarstva tijekom vremena (1928.-2007.) prikazuje četiri različita uzoraka koji obilježavaju četiri faze razvoja grčkog ribarstva: 1. postupno povećavanje tijekom 1928.-1949. (pred-faza razvoja ribarstva), 2. strmo povećanje tijekom 1950.-1969. (faza rasta), 3. značajan linearni porast tijekom 1970.-1994. (faza potpunog dο prekomjernog ulova) i 4. opadajući trend tijekom 1995.-2007. (kolaps faza). Ove faze se kronološki poklapaju sa značajnim socio-ekonomskim i političkim događanjima koja su se zbivala u Grčkoj od 1928. godine

Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)

Parallel fishing trials with 0.30 mm diameter monofilament gill nets and longlines using small hooks were carried out in the Algarve (southern Portugal) over a one-year period, 1997-1998, with the objective of comparing species composition, catch rates, discards and size ranges. Four hook sizes of MUSTAD brand, round bent, flatted sea hooks (numbers 15, 13, 12 and 11) and four mesh sizes of 50, 60, 70, and 80 (stretched mesh) (nominal bar length) of gill nets were used in the trials. Overall, 84 species were caught, with gill nets taking 71 species and longlines 54 species and with 41 species caught by both gear types. The amount of discarding was higher for gill nets than for longlines. The catch species composition differed between the two gear types, with the commercially valuable sea breams dominating the longline catches whereas small pelagics were relatively more important in the gill nets. Multivariate analysis showed a clear separation between the different sizes of the two gear types both in terms of numbers and weights per species. Algarve gill netters and longliners fish the same species assemblage on the same fishing grounds, but have clearly different impacts in terms of catch species composition, catch rates and sizes. This information will be useful for the improved management of these small-scale, multi-species, multi-gear fisheries, where different gear types compete for scarce resources. In particular this study provides a basis for a more rational allocation of licenses and control of fishing effort

TYPOLOGY OF THE ALBANIAN SMALL-SCALE FISHERIES

Nedostatak pouzdanih statističkih podataka o ribarstvu sprječava potpunu procjenu stanja morskih resursa. Središte ovog problema su područja siromašna podacima o ribarstvu, kao što je morsko područje uz obalu Albanije, a posebno područje malog ribolova. Cilj ovog istraživanje je prikazati mali ribolov u vodama južne Albanije na temelju dnevnog praćenja ulova ribarskih vrsta tijekom dvogodišnjeg razdoblja (2016.-2018.). Rezultatima je utvrđeno ukupno 6, odnosno 11 ribolovnih métiera za mreže i parangale. Najvažnije ciljne vrste za mreže u smislu ulova bile su Merluccius merluccius, Mullus surmuletus, Pagellus erythrinus, Sepia officinalis i Solea vulgaris. Ribolov s parangalom kategoriziran je u dva različita ribolovna područja, jedan je usmjeren na velike pelagične vrste Thunnus thynnus i Xiphias gladius, a drugi za širok raspon vrsta Sparidae i Epinephelus marginatus. Ovdje predstavljeni podaci i analize imaju za cilj smanjiti trenutni nedostatak kvantitativnih podataka u slučaju ograničenih podataka o ribarstvu, kao što je albanski mali ribolov, te pružiti informacije za razvoj praćenja ovog ribarstva.The lack of reliable fisheries statistics hampers full assessment of the status of marine resources. Central to this problem are data-poor fisheries such as the Albanian seas and in particular the SSF sector. The present study aims to portray the small-scale fishery of south Albanian waters based on daily onboard monitoring of fisheries species catches during a two-year period (2016-2018). Results revealed a total of 6 and 11 fishing métiers for the nets and longlines, respectively. The most important target species for nets in terms of catches were Merluccius merluccius, Mullus surmuletus, Pagellus erythrinus, Sepia officinalis and Solea vulgaris. Longline fisheries were categorized into two distinct fishing métiers, one targeting the large pelagics Thunnus thynnus and Xiphias gladius, and the other targeting a wide range of Sparidae species and Epinephelus marginatus. The data and analysis presented here aim to reduce the current lack of quantitative data on a fisheries data-limited case such as the Albanian small-scale fishery and to provide information for developing monitoring for this fishery