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| Registros recuperados: 12 | |
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| Sala, Antonello; Nielsen, Rasmus; Polet, Hans; Laffargue, Pascal; Smith, Chris; Zengin, Mustafa; Rijnsdorp, Adriaan. |
| This report provides a detailed account of the field and modelling studies carried out in the BENTHIS project in the Baltic Sea, North Sea, Western Waters, Mediterranean and Black Sea on the mitigation of bottom trawling impacts on the seafloor and benthic ecosystem. The studies were conducted in close collaboration with fishers and gear manufacterers and focused on the major bottom trawl fisheries in European waters: otter trawl fisheries for demersal fish, otter trawl fisheries for Nephrops, beam trawl fisheries for flatfish, beam trawl fisheries for brown shrimps, beam trawl fisheries for whelks, dredge fisheries for bivalves (mussel, scallops). Both technological innovations and alternative management scenarios were explored. Technological innovations... |
| Tipo: Text |
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| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00425/53635/54473.pdf |
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| Rijnsdorp, Adriaan D.; Eigaard, Ole R.; Kenny, Andrew; Hiddink, Jan Geert; Hamon, Katell; Piet, Gerjan; Sala, Antonello; Nielsen, Rasmus; Polet, Hans; Laffargue, Pascal; Zengin, Mustafa; Gregerson, Olavur. |
| BENTHIS developed the scientific basis to quantify the impact of bottom trawling on the seafloor and the benthic ecosystem. Based on insight in how fishing gear affects the seafloor, an assessment framework was developed that provide indicators of impact and seafloor status on a continuous scale that can be applied in the context of the MSFD. The mechanistic approach allows us to set reference values of impact (status) to estimate the proportion of a region or habitat where the impact is below (status is above) the threshold. The methodology combines estimates of trawling intensity with the depth to which the fishing gear penetrates into the sea bed (penetration profile) and the sensitivity of the habitat. Habitat sensitivity is estimated from the... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00425/53653/54489.pdf |
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| Eigaard, Ole R.; Bastardie, Francois; Hintzen, Niels; Buhl-mortensen, Lene; Buhl-mortensen, Pål; Catarino, Rui; Dinesen, Grete E.; Fock, Heino; Geitner, Kerstin; Gerritsen, Hans; Gonzalez, Manuel M.; Jonsson, Patrik; Kavadas, Stefanos; Laffargue, Pascal; Lundy, Mathieu; Mirelis, Genoveva G.; Nielsen, Rasmus; Papadopoulou, Nadia; Posen, Paulette; Pulcinella, Jacopo; Russo, Tomasso; Sala, Antonello; Silva, Cristina; Smith, Chris; Vanelslander, Bart; Zengin, Mustafa; Rijnsdorp, Adriaan D.. |
| Mapping and monitoring of pressure from fishery on the marine benthic environment is necessary to support an ecosystem approach to fisheries management (EAFM). In many cases this need is not reflected in official fisheries statistics and logbooks, where focus typically is on catch rather than effort. Consequently, most logbook information is not well suited for quantitative estimation of seafloor impact (swept area and impact severity) of the different gears and trips. We developed a method to overcome this information deficiency of official statistics and produced European wide high-resolution fishing intensity maps (total yearly swept area within grid cells of 1*1 minutes longitude and latitude) for 2010, 2011 and 2012. The annual distribution and... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00310/42138/54476.pdf |
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| Marchal, Paul; Bartelings, Heleen; Bastardie, François; Batsleer, Jurgen; Delaney, Alyne; Girardin, Raphael; Gloaguen, Pierre; Hamon, Katell; Hoefnagel, Ellen; Jouanneau, Charlène; Mahevas, Stephanie; Nielsen, Rasmus; Piwowarczyk, Joanna; Poos, Jan-jaap; Schulze, Torsten; Rivot, Etienne; Simons, Sarah; Tidd, Alex; Vermard, Youen; Woillez, Mathieu. |
| The scope of this report is to present the science developed within the VECTORS project to improve the understanding of the key processes driving the behaviour of human agents utilising a variety of EU maritime domains. While particular attention has been paid to the spatial interactions between fishing activities and other human uses (e.g., maritime traffic, offshore wind parks, aggregate extractions), the behaviour of non-fishing sectors of activity has also been considered. Various quantitative and semi-qualitative approaches have been pursued to gain better insight into behavioural drivers based on past data, and also forecast how human agents would react if access was constrained by either management (e.g. Marine Protected Areas – MPA), or the... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00223/33377/31802.pdf |
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| Ankamah-Yeboah, saac; ielsen, Max; Nielsen, Rasmus. |
| Consumers buy organic products to increase utility, while farmers invest in organic production to achieve price premiums. However, investors would like to avoid the risk of falling prices when organic supply increases to maintain profit. We suggest the use of market integration tests between non-stationary price series of organic/conventional products to reveal whether increasing organic supply can be expected to reduce price premiums. Increased organic supply will induce price falls if organic/conventional markets are independent. Organic supply growth will leave price premiums unchanged, if prices move together over time, since conventional supply typically is larger than organic. The method is applied to the Danish market for farmed salmonids.... |
| Tipo: Journal paper |
Palavras-chave: Farm economics; Social aspects. |
| Ano: 2017 |
URL: http://orgprints.org/31425/1/Market%20Analysis%20Organic%20vs%20Conventional.pdf |
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| Ankamah-Yeboah, Isaac; Jocobsen, Jette Bredahl; Olsen, Søren Bøye; Nielsen, Rasmus; Nielsen, Max. |
| The past decades have experienced growing demand for ecolabels displaying environmental and sustainability information, with associated price premiums. With growing number of ecolabels in the markets, strategic positioning is required to attract value. Nevertheless, consumer preference for other attributes, for example, local products appears to be overshadowing the value for ecolabels. A suitable communication and education strategy for consumers is warranted to counteract this effect. Using stated choice experiment, we test for the effect of different types of information regarding organic aquaculture production principles on the demand for portion size trout in the German market, while considering other important product attributes. The results indicate... |
| Tipo: Journal paper |
Palavras-chave: Farm economics. |
| Ano: 2017 |
URL: http://orgprints.org/31429/1/Heterogenous%20preferences%20information.pdf |
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| Ankamah-Yeboah, Isaac; Asche, Frank; Bronnmann, Julia; Nielsen, Max; Nielsen, Rasmus. |
| Sustainably produced food products have rapidly grown in popularity within the last years. Eco-labeling systems to indicate the environmental sustainability of product have also been implemented in the seafood market, with the MSC label for wild fish as the leading one. However, it is not clear whether consumers really notice the values behind an eco-label and how important these attributes are in their purchasing decision. This study analyzes data from a large household scanner panel to investigate actual consumer purchasing behavior and preferences when faced with competing product attributes such as organic and MSC labeled for salmon in Denmark. To accomplish these objectives and explicitly account for consumer heterogeneity, a mixed logit as well as a... |
| Tipo: Journal paper |
Palavras-chave: Farm economics. |
| Ano: 2017 |
URL: http://orgprints.org/31428/1/Salmon%20Demand.pdf |
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| Ankamah-Yeboah, Isacc; Nielsen, Max; Nielsen, Rasmus. |
| In this study, we compare the economic performance of organic trout farms to conventional trout and organic agricultural farms. Farm account statistics from Statistic Denmark using financial performance indicators like the degree of profitability and farm solvency ratio shows an impressive organic trout sector. Though organic trout farms could not generate enough income from farm assets in 2010 and 2011, they picked up in 2012. Generally, organic trout farms tend to be equal or better in generating income per unit value of assets and have higher solvency ratios, indicating lower probability of default than alternative conventional trout farms and organic agricultural farms. An average organic trout farm was able to generate incomes of 8% per unit value of... |
| Tipo: Journal paper |
Palavras-chave: Farm economics. |
| Ano: 2017 |
URL: http://orgprints.org/31427/1/Economic%20Performance.pdf |
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| Ankamah-Yeboah, Isaac; Nielsen, Max; Nielsen, Rasmus. |
| Organic aquaculture production is attaining impressive growth and demand is strongest in Europe. Countries like Germany, France and Switzerland particularly have stronger consumption markets. In 2010, the European Union implemented a harmonized system of organic aquaculture production principles for all member states. The regulation requires that fish production should exclusively be based on organic fry from 2016. Given that antibiotic use is only allowed in very strict limits, robustness of the fry to diseases is very crucial, particularly for countries like Denmark where serious trout fry diseases are a major concern. In spite of this, Denmark is making headway in organic aquaculture production, currently being the leading supplier of organic rainbow... |
| Tipo: Report |
Palavras-chave: Farm economics; Social aspects; Aquaculture. |
| Ano: 2017 |
URL: http://orgprints.org/31474/1/IFRO_Report_259.pdf |
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| Ankamah-Yeboah, Isaac; Nielsen, Max; Nielsen, Rasmus. |
| The report compares ecolabeled seafood premiums observed in the market with consumers’ stated willingness to pay premiums. Also ecolabeled premiums in the agricultural sector were examined. The next issue addressed was the sensitivity of changes in the price and premiums of ecolabeled seafood. Empirical findings showed that all things being equal, consumers stated willingness to pay reflects in their actual market behavior though they may pay less than stated. Premiums observed in the aquaculture (24-38%) appear to be generally higher than the fisheries (10-13%). Stated premiums for environmentally sound seafood production however ranged from 15-50%. In the agricultural sector, revealed premiums mostly seem to lie in range of 10-50% with few extremes and... |
| Tipo: Journal paper |
Palavras-chave: Farm economics. |
| Ano: 2017 |
URL: http://orgprints.org/31426/1/Premium%20Ecolabels.pdf |
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| Ankamah-Yeboah, Isaac; Nielsen, Max; Nielsen, Rasmus. |
| The year 2016 will be pivotal for organic aquaculture producers in EU, because it represents the deadline for implementing the complete organic life cycle in aquaculture production. Depending on the sturdiness of farms already producing, such a shift in the industry may affect production costs of exclusively using organic fry for production. If the profitability of the primary organic aquaculture producers should be maintained, then farmers must be able to correspondingly receive higher prices, transmitted through the value chain from the retail market. This study identifies the price premium for organic salmon in Danish retail sale using consumer panel scanner data from households by applying a random effect hedonic price model that permits unobserved... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm economics. |
| Ano: 2015 |
URL: http://orgprints.org/33630/1/Isaac_EAFE2015.pdf |
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| Registros recuperados: 12 | |
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