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

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

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

Dužinsko – maseni odnosi i kondicijski čimbenici gavuna veleljuskaša Atherina boyeri (Risso, 1810) iz komercijalnih i eksperimentalnih ulova u jezeru Trichonis (zapadna Grčka)

Total length-weight relationships (LWRs) from 3583 individuals of Atherina boyeri (Risso, 1810) caught in Lake Trichonis (Western Greece), using a commercial encircled net and experimental Nordic type benthic and pelagic multi-mesh gillnets, were estimated during 2019-2020. The variation of the parameter b for all seasons combined was significantly allometric, for both encircled towed and gillnets, with a quite robust fit (R2 equals 0.925 and 0.947, respectively) and values equal to 2.254 and 2.089, respectively. The specimens were significantly lighter in summer than in the other seasons. The slopes of the LWRs significantly differ between seasons and exhibited relatively low values when compared to other ecosystems worldwide and in the same ecosystem in previousperiods of time. Τhe estimated values of the Le Cren index were significantly higher than the Allometricand the Fulton ones.Dužinsko-maseni odnosi (LWRs) su izračunati za 3583 jedinke gavuna veleljuskaša Atherina boyeri (Risso, 1810) ulovljenih u jezeru Trichonis (Zapadna Grčka), tijekom razdoblja 2019-2020. Jedinke su ulovljene komercijalnim mrežama i eksperimentalnim mrežama nordijskog tipa bentoskih i pelagičnih mreža različitih oka. Varijacija parametra b za sva godišnja doba bila je značajno alometrijska, i za zaokružne povlačne mreže i za mreže stajačice, s prilično robusnim vrijednostima koeficijenta korelacije (r2 je 0,925 odnosno 0,947) i vrijednostima jednakim 2,254 odnosno 2,089. Primjerci su ljeti bili znatno lakši nego u ostalim godišnjim dobima. Nagibi LWR-a značajno se razlikuju između godišnjih doba i pokazali su relativno niske vrijednosti u usporedbi s drugim ekosustavima diljem svijeta i u istom ekosustavu u prethodnim vremenskim razdobljima. Procijenjene vrijednosti Le Crenovog indeksa bile su znatno veće od alometrijskih i Fultonovih

Strong fisheries management and governance positively impact ecosystem status

Fisheries have had major negative impacts on marine ecosystems, and effective fisheries management and governance are needed to achieve sustainable fisheries, biodiversity conservation goals and thus good ecosystem status. To date, the IndiSeas programme (Indicators for the Seas) has focussed on assessing the ecological impacts of fishing at the ecosystem scale using ecological indicators. Here, we explore fisheries Management Effectiveness' and Governance Quality' and relate this to ecosystem health and status. We developed a dedicated expert survey, focused at the ecosystem level, with a series of questions addressing aspects of management and governance, from an ecosystem-based perspective, using objective and evidence-based criteria. The survey was completed by ecosystem experts (managers and scientists) and results analysed using ranking and multivariate methods. Results were further examined for selected ecosystems, using expert knowledge, to explore the overall findings in greater depth. Higher scores for Management Effectiveness' and Governance Quality' were significantly and positively related to ecosystems with better ecological status. Key factors that point to success in delivering fisheries and conservation objectives were as follows: the use of reference points for management, frequent review of stock assessments, whether Illegal, Unreported and Unregulated (IUU) catches were being accounted for and addressed, and the inclusion of stakeholders. Additionally, we found that the implementation of a long-term management plan, including economic and social dimensions of fisheries in exploited ecosystems, was a key factor in successful, sustainable fisheries management. Our results support the thesis that good ecosystem-based management and governance, sustainable fisheries and healthy ecosystems go together.IOC-UNESCO; EuroMarine; European FP7 MEECE research project; European Network of Excellence Eur-Oceans; FRB EMIBIOS project [212085]info:eu-repo/semantics/publishedVersio

Scientific, Technical and Economic Committee for Fisheries (STECF) : 64th Plenary Report (PLEN-20-02)

The Scientific, Technical and Economic Committee for Fisheries (STECF) held its 64th plenary as a virtual meeting from 6-10 July 2020.-- 128 pagesCommission Decision of 25 February 2016 setting up a Scientific, Technical and Economic Committee for Fisheries, C(2016) 1084, OJ C 74, 26.2.2016, p. 4–10. The Commission may consult the group on any matter relating to marine and fisheries biology, fishing gear technology, fisheries economics, fisheries governance, ecosystem effects of fisheries, aquaculture or similar discipline

Trammel net catch species composition, catch rates and metiers in southern European waters: A multivariate approach

We identified and quantified the effect of season, depth, and inner and outer panel mesh size on the trammel net catch species composition and catch rates in four southern European areas (Northeast Atlantic: Basque Country, Spain; Algarve, Portugal; Gulf of Cadiz, Spain; Mediterranean: Cyclades, Greece), all of which are characterised by important trammel net fisheries. In each area, we conducted, in 1999-2000, seasonal, experimental fishing trials at various depths with trammel nets of six different inner/outer panel mesh combinations (i.e., two large outer panel meshes and three small inner panel meshes). Overall, our study covered some of the most commonly used inner panel mesh sizes, ranging from 40 to 140 mm (stretched). We analysed the species composition and catch rates of the different inner/outer panel combinations with regression, multivariate analysis (cluster analysis and multidimensional scaling) and other 'community' techniques (number of species, dominance curves). All our analyses indicated that the outer panel mesh sizes used in the present study did not significantly affect the catch characteristics in terms of number of species, catch rates and species composition. Multivariate analyses and seasonal dominance plots indicated that in Basque, Algarve and Cyclades waters, where sampling covered wide depth ranges, both season and depth strongly affected catch species compositions. For the Gulf of Cadiz, where sampling was restricted to depths 10-30 m, season was the only factor affecting catch species composition and thus group formation. In contrast, the inner panel mesh size did not generally affect multidimensional group formation in all areas but affected the dominance of the species caught in the Algarve and the Gulf of Cadiz. Multivariate analyses also revealed 11 different metiers (i.e., season-depth-species-inner panel mesh size combinations) in the four areas. This clearly indicated the existence of trammel net 'hot spots', which represent essential habitats (e.g., spawning, nursery or wintering grounds) of the life history of the targeted and associated species. The number of specimens caught declined significantly with inner panel mesh size in all areas. We attributed this to the exponential decline in abundance with size, both within- and between-species. In contrast, the number of species caught in each area was not related to the inner mesh size. This was unexpected and might be a consequence of the wide size-selective range of trammel nets. (c) 2006 Elsevier B.V All rights reserved

Scientific, Technical and Economic Committee for Fisheries (STECF) : 65th Plenary Report (PLEN-20-03)

The Scientific, Technical and Economic Committee for Fisheries (STECF) held its 65th plenary as virtual meeting from 9-13 November 2020.-- 152 pagesCommission Decision of 25 February 2016 setting up a Scientific, Technical and Economic Committee for Fisheries, C(2016) 1084, OJ C 74, 26.2.2016, p. 4–10. The Commission may consult the group on any matter relating to marine and fisheries biology, fishing gear technology, fisheries economics, fisheries governance, ecosystem effects of fisheries, aquaculture or similar disciplinesPeer reviewe

Trophic signatures of small-scale fishing gears: implications for conservation and management

We quantified the ecosystem effects of small-scale gears operating in southern European waters (Portugal, Spain, Greece), based on a widely accepted ecosystem measure and indicator, the trophic level (TL). We used data from experimental fishing trials during 1997 to 2000. We studied a wide range of gear types and sizes: (1) gill nets of 8 mesh sizes, ranging from 44 to 80 mm; (2) trammel nets of 9 inner panel mesh sizes, ranging from 40 to 140 mm; and (3) longlines of 8 hook sizes, ranging from Nos. 15 (small) to 5 (large). We used the number of species caught per TL class for constructing trophic signatures (i.e. cumulative TL distributions), and estimated the TL at 25, 50 and 75% cumulative frequency (TL25, TL50, TL75) and the slopes using the logistic function. We also estimated the mean weighted TL of the catches (TLW). Our analyses showed that the TL characteristics of longlines varied much more than those of gill and trammel nets. The longlines of large hooks (Nos. 10, 9, 7, 5) were very TL selective, and their trophic signatures had very steep slopes, the highest mean TL50 values, very narrow mean TL25 to TL75 ranges and mean TLW > 4. In addition, the mean number of TL classes exploited was smaller and the mean TL50 and TLW were larger for the longlines of small hooks (Nos. 15, 13, 12, 11) in Greek than in Portuguese waters. Trammel and gill nets caught more TL classes, and the mean slopes of their trophic signatures were significantly smaller than those of longlines as a group. In addition, the mean number of TL classes exploited, the mean TL50 and the TLW of gill nets were significantly smaller than those of trammel nets. We attribute the differences between longlines of small hooks to bait type, and the differences between all gear types to their characteristic species and size-selectivity patterns. Finally, we showed how the slope and the TL50 of the trophic signatures can be used to characterise different gears along the ecologically ‘unsustainable– sustainable’ continuum

Portraying Trawl Fishery in Albanian Waters: Case Study from the Sarandë Area (Southern Albania)

The current study provides valuable insight into the trawl fishery operating in southern Albanian waters via an integrated approach based on high-frequency onboard monitoring 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's 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