A bio-economic indicators suite for the appraisal of the demersal trawl fishery in the Southern Adriatic Sea (Central Mediterranean)

Ceriola, Luca; Accadia, Paolo; Mannini, Piero; Massa, Fabio; Milone, Nicoletta; Ungaro, Nicola

doi:10.1016/j.fishres.2008.01.017

Cited by 25 publications

(23 citation statements)

References 33 publications

(56 reference statements)

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“…When indicators are analysed at the community level, the different response of the more resilient species to the direct and indirect impacts of fishing could have compensated the decrease in the long-lived species, which makes the information provided by the multispecies indicators difficult to interpret (Ceriola et al 2008). Ceriola et al (2008) suggested that the lack of clear trends in the elasmobranch biomass index could be related to the high exploitation level in their study area (southern Adriatic Sea) that kept the elasmobranchs at a relatively low but steady level. This is not our case, because previous studies have considered the first part of the series as a period of under-exploitation for six analysed stocks (Quetglas, pers.comm.…”

Section: Discussionmentioning

confidence: 99%

Inter- and intra-annual trends and status indicators of nektobenthic elasmobranchs off the Balearic Islands (northwestern Mediterranean)

Guijarro¹,

Quetglas²,

Moranta³

et al. 2011

Sci. Mar.

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SUMMARY:We assessed the elasmobranch communities exploited by the bottom trawl fishery off the Balearic Islands (northwestern Mediterranean) by analysing two time series containing information with different levels of detail: 1) a longterm series containing the abundance indices of the whole elasmobranch community landed from 1965 to 2009; and 2) a shorter time series from 2000 to 2009 from two different data sources (daily sales records: 2000-2009; bottom trawl surveys: 2001-2009), with information that allowed the shelf and slope to be analysed separately and different community parameters and abundance indices to be studied. Temporal trends of all these variables were used as ecological status indicators and tested with generalized additive models and analysis of variance. They were finally summarised using the Traffic Light methodology. The long-term series showed two marked trends, an inter-annual decreasing trend that would be a consequence of the large increase in fishing effort, and an intra-annual trend with a clear peak in May in accordance with the seasonal biological cycle of these species. However, data from the last ten years revealed differences between the shelf and slope, as some parameters increased significantly over time on the shelf but did not follow any trend on the slope. The Traffic Light methodology captured these differences well, demonstrating its usefulness for interpreting ecological transitions at a glance.Keywords: elasmobranchs, assessment, Traffic Light method, indicators, fishing effort, Balearic Islands. RESUMEN:Tendencias inter e intra-anuales e indicadores del estado de las poblaciones de elasmobranquios nectobentónicos de las Islas Baleares (Mediterráneo nordoccidental). -Se han evaluado las poblaciones de elasmobranquios explotadas por la pesca de arrastre de las Islas Baleares (Mediterráneo noroccidental) analizando dos series temporales con información a distinto nivel de detalle: 1) una serie larga que contiene únicamente el índice de abundancia de toda la población de elasmobranquios desembarcada entre 1965 y 2009 y 2) una serie corta a lo largo de la primera década del siglo XXI proveniente de dos fuentes de datos diferentes (hojas de venta diarias: 2000-2009; campañas de arrastre de fondo: 2001-2009), que permitieron el análisis, para la plataforma y el talud por separado, de diferentes parámetros de la comunidad además de índices de abundancia. Las tendencias temporales de todas estas variables se usaron como indicadores ecológicos de estado y se testaron aplicando modelos generales aditivos y análisis de la varianza y finalmente se han resumido usando la metodología de los Semáforos. La serie larga mostró dos señales claras, un decrecimiento interanual que podría ser consecuencia del importante incremento del esfuerzo pesquero, y una tendencia intra-anual con un claro pico en mayo, relacionado con el ciclo biológico estacional de estas especies. Así y todo, los datos del primer decenio del siglo XXI revelaron diferencias entre la plataforma y el talud, porque algu...

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Section: Discussionmentioning

confidence: 99%

Inter- and intra-annual trends and status indicators of nektobenthic elasmobranchs off the Balearic Islands (northwestern Mediterranean)

Guijarro¹,

Quetglas²,

Moranta³

et al. 2011

Sci. Mar.

View full text Add to dashboard Cite

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“…These facilitate the process of assessing the performance of fisheries policies and management. They further promote understanding and communication around key sustainability issues and support decision making and policy setting for sustainable development (FAO, 1999;Potts, 2006 Sabatella and Franquesa, 2004); Hundloe (2000) and Ceriola et al (2008). Financial indicators have not been included in this study because of the lack of consistent time series on financial aspects of inland capture fisheries and aquaculture operations e.g.…”

Section: Methodsmentioning

confidence: 99%

“…With increasing concerns regarding the sustainable use of natural resources among public, civil society organizations and scientific communities, the use of indicators as a practical tool to assess existing status, identify development patterns and monitor ecological, economic and social aspects of fisheries and aquaculture sectors is gaining popularity and support among international and national advisory and management bodies (Bonzon, 2000;Hundloe, 2000;Sabatella and Franquesa, 2004;Liu and Ou, 2007;Ünal and Franquesa, 2010). Many indicators have been developed by scientists and/or international organizations to assess and analyze the performance of fisheries and aquaculture sectors from social and economic perspective (Bonzon, 2000;Hundloe, 2000;Sabatella and Franquesa, 2004;Ceriola et al, 2008).…”

Section: Ferit Radmentioning

confidence: 99%

Untitled

Rad¹,

Rad²

2012

Turk. J. Fish. Aquat. Sci.

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This paper aims to shed light on economic dimensions of inland capture fisheries and aquaculture in Turkey and to provide further comparisons of performance and development trends in both subsectors at national level by using some macro-economic and market indicators. To this end, indicators inter alia per capita domestic supply, contribution to GDP, ratio harvesting weight and value, mean real price/kg were computed using secondary data from the 1996-2009 period. The outcome of comparative assessment, e.g. supply, per capita supply, contribution to GDP, ratio harvesting weight and value, does provide evidence for increasing economic importance of aquaculture and changes in market dynamics for freshwater aquatic products in Turkey. While inland aquaculture, especially rainbow trout farming, is emerging as a major supplier and player in market for freshwater fish species, inland capture fisheries is losing ground. Taking into account the importance of inland fisheries from socio-economic perspective, effective policies and management measures are to be implemented to ensure economic sustainability of this subsector. On the other hand, inland aquaculture subsector also has to address challenges such as unregulated single-species supply, species diversification, product diversification/differentiation and image building to ensure its sustainability.Keywords: Inland capture fisheries, inland aquaculture, economic indicators, Turkey. Ekonomik Sürdürülebilirlik Göstergeleri Kullanılarak Türkiye'de İç Su Ürünleri Avcılığı ve Yetiştiriciliğinin Karşılaştırmalı Değerlendirilmesi ÖzetBu çalışmada, Türkiye iç su ürünleri avcılığı ve yetiştiriciliği alt sektörlerinin ekonomik boyutunun ortaya konulması amaçlanmıştır. Ayrıca bazı makro ekonomik ve pazar göstergeleri kullanılarak iki alt sektörün ulusal düzeyde performansı ve gelişme eğilimi karşılaştırılmıştır. Bu amaçla; 1996-2009 dönemine ilişkin ikincil veriler kullanılarak kişi başına düşen arz, GSYİH' a katkı, hasat miktarı ve değeri oranları ile ortalama reel fiyat/kg gibi bazı göstergeler hesaplanmıştır. Toplam arz, kişi başına düşen arz, GSYİH' a katkı ile hasat miktarı ve değeri oranları gibi göstergelerin karşılaştırmalı değerlendirmesi; iç su balıkları yetiştiriciliğinin ekonomik açıdan öneminin arttığını ve pazar dinamiklerini değiştirdiğini kanıtlamaktadır. İç su balıkları ve özellikle Gökkuşağı alabalığı yetiştiriciliği pazarda önemli bir tedarikçi ve aktör haline gelirken; iç su ürünleri avcılığı giderek zemin kaybetmektedir. İç su ürünleri avcılığının sosyo-ekonomik önemi bu alt sektörün ekonomik açıdan sürdürülebilirliğini sağlayacak etkin politika ve yönetsel düzenlemelerin hayata geçirilmesini gerekli kılmaktadır. Diğer taraftan; iç su balıkları yetiştiriciliği alt sektörü de; sürdürülebilirliğin sağlanması açısından denetimsiz tek tür balık arzı, tür çeşitlendirmesi, ürün çeşitlendirmesi/farklılaştırması ve imaj gibi konuları ele alarak çözüm aramalıdır.Anahtar Kelimeler: İç su ürünleri avcılığı, iç su balıkları yetiştiriciliği, ekonomik göstergel...

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“…Definition of variables and methodologies for estimation are prescribed in the DCF through coordination activities carried out by European expert groups (Sabatella, 2016). A wide range of economic indicators exists for analyzing the economic sustainability of fisheries (Ceriola et al, 2008). Among these indicators, we selected the Net Economic Returns (NER) Minimum mesh sizes For towed nets, the net shall be replaced by a square-meshed net of 40 mm at the cod-end or, at the duly justified request of the ship-owner, by a diamond meshed net of 50 mm.…”

Section: Fisheries Data and Economic Indicatorsmentioning

confidence: 99%

Key Economic Characteristics of Italian Trawl Fisheries and Management Challenges

et al. 2017

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Two key measures of economic performance are calculated and analyzed for three important Italian trawl fisheries (Northern Thyrrenian Sea, South of Sicily, Northern Adriatic Sea): the Net Economic Returns (NER), which informs on the economic performance and is considered a proxy of resource rent in fisheries and the Return on Fixed Tangible Assets (ROFTA), which is used as an approximation of the Return on Investment (ROI) and is a key financial and performance indicator for a fisherman in order to take a decision to operate in a fishery. The trend of these indicators over the last decade highlights a poor economic performance that is associated with an overall poor condition of the state of resources. The trend of economic performance indicators is put in relation, on a time-based approach, with the different types of management measures applied over the last decade. We show that trends of fishing effort and economic indicators as well as statistical analysis return a coherent interpretation of the main factors affecting the profitability levels of the selected fleets. The study reveals that management measures impacted negatively on the profitability of the sector in the short run. However, economic indicators inverted the trend in the last 3 years. An increasing biomass trend as well as the improvement in fishing mortality of some few stocks, together with the reduction of input costs could be considered as positive drivers which impacted positively on economic profitability of the fisheries concerned. The study argues that even the technical and fishery management provisions in the Mediterranean Sea may have started to reverse the trend in economic profitability of the analyzed fleets. An additional management effort needs, however, to be developed on an urgent basis in order to ensure the achievement of the management goals defined by the Common Fisheries Policy (CFP).

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A bio-economic indicators suite for the appraisal of the demersal trawl fishery in the Southern Adriatic Sea (Central Mediterranean)

Cited by 25 publications

References 33 publications

Inter- and intra-annual trends and status indicators of nektobenthic elasmobranchs off the Balearic Islands (northwestern Mediterranean)

Inter- and intra-annual trends and status indicators of nektobenthic elasmobranchs off the Balearic Islands (northwestern Mediterranean)

Untitled

Key Economic Characteristics of Italian Trawl Fisheries and Management Challenges

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