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1.
Capture fisheries in the north‐east Atlantic account for approximately 10% of all fish consumed from capture fisheries globally. The literature shows that consumers show considerable interest in social sustainability of products in general and of fish specifically. This interest, however, has not yet been investigated for fish from the north‐east Atlantic. The first objective of this study, therefore, was to investigate whether consumers are interested in social sustainability issues of whitefish from the north‐east Atlantic by determining preferences for four social sustainability issues with distinct benefits in relation to a known reference point (i.e. approach to overfishing). The second objective of this study was to determine to what degree case‐specific and general psychographic consumer characteristics explain preferences for these issues. Choice modelling results from an online survey among 457 Dutch consumers show that consumers have the strongest preference for the environmental sustainability issue approach to overfishing. In addition, results on the social sustainability issues showed that consumers prefer fish welfare over product quality, worker safety and local employment, indicating that in this case, consumers place animal benefits over personal, worker and community benefits. The case‐specific psychographic characteristic concern contributed most to explaining preferences for the environmental sustainability issue, whereas the general psychographic characteristic personal relevance contributed most to explaining preferences for the social sustainability issues. This result is likely explained by the principal focus on MSC certification in markets for fish products, which caused consumers to form opinions (e.g. concern) on overfishing, but not on social sustainability.  相似文献   

2.
ABSTRACT

Experts in the oyster supply chain (farmers, retailers, and gourmet chefs) in The Netherlands have suggested that the European flat oyster (Ostrea edulis) has superior sensory qualities compared to the Pacific cupped oyster (Crassostrea gigas). However, scientific evidence is lacking. The aim of this study was to evaluate consumer preferences for these two oyster species and to determine the sensory properties of both species by consumers. Two-alternative forced choice tests were performed with the oysters involving a panel of 74 naïve consumers. No significant differences in preferences between the oyster species were observed by the consumers. Nine sensory attributes of both oyster species were evaluated. Consumers did not observe significant differences between species in the sensory attributes: overall odor intensity, sea odor, mud odor, sweetness, pungency, and firmness. The Pacific cupped oyster was perceived as significantly saltier and more intense in greenness than the European flat oyster. We concluded that only a few sensory properties of the European flat oyster and the Pacific cupped oyster are perceived as being different by untrained consumers.  相似文献   

3.
The application of probiotics in food is now widespread and is widely accepted by consumers. Lactic Acid Bacteria (LAB) were isolated from traditional salted fish and then characterized by its ability to inhibit Vibrio parahaemolyticus growth using minimal inhibitory concentration tests. Five out of these strains were identified as Lactobacillus delbrueckii, Lactobacillus casei and three Lactobacillus gasseri by PCR using 16S and 23S rRNA genes. Antibiofilm activity of Lactobacillus spp. extracts were also tested in 96 polystyrene plates. A potential antibiofilm effect was demonstrated as most LAB. Although most LAB extract were able to eradicate pre‐formed biofilm, results demonstrated that five Lactobacillus spp. exhibited a stronger inhibitory effect against V. parahaemolyticus in infected oysters. Vibrio parahaemolyticus viable cells number declined from 106 UFC to 104 UFC after 3 days of incubation with Lactobacillus spp. Probiotic applications, in biological control of seafood associated pathogens can be an alternative solution, providing consumer with a product of good quality owing to the use of non‐toxic compounds. Based on our results, LAB could be used as a bioprotective culture in oyster's depuration to prevent V. parahaemolyticus growth.  相似文献   

4.
Tuna is one of the most important marine products in Japan, but fishery productivity is decreasing, especially for bluefin tuna (Thunnus orientalis, Thunnus thynnus) because of strict capture limits implemented by regional fisheries management organizations (RFMOs). Such capture limitations are necessitated by a shortage of resources. At the same time, full-cycle farming technology of Thunnus orientalis has recently been developed. This technology is set to achieve productivity levels at an industrial scale. In Japan, however, most consumers are believed to have a negative image of farmed products; therefore effective marketing is necessary. This study employs conjoint analysis via an internet questionnaire to clarify consumer preferences and the determine the possibility of marketing through provision of information to consumers regarding bluefin tuna and the environmental background of the problem. The results show that once consumers are provided with enough information about bluefin tuna, particularly in terms of the underlying resources problem, the willingness to pay (WTP) for full-cycle farmed fish is greater compared to conventionally farmed fish. Furthermore, if the product has an “eco-label,” the WTP increases drastically. Therefore, the informational process is important for marketing, and labeling can be an efficient marketing method.  相似文献   

5.
In many countries, aquaculture development has been driven by technical solutions to the culture of high unit value (HUV) species. As rising production has met with falling prices, diversification into other HUV species has occurred and renewed the 'speciescycle’process. However, if aquaculture is to make its forecast contribution to offset declining capture supplies, some redirection may be needed to determine the substitute species and the product profile sought by consumers, and hence, the areas for genuine opportunity for growth. To this end, this paper employs Multiple Correspondence Analysis (MCA) to analyse consumer acceptance of a cultured product. The MCA identifies patterns of association hidden by conventional techniques and may provide a methodology for identifying more relevant responses by the international aquaculture industry to the needs of the market. To illustrate the potential, the paper presents a case study of African catfish, Clarias gariepinus (Burchell 1822), using face-to-face consumer surveys incorporating samples of Clarias fillets in household meals. The MCA suggests that the Clarias product has attributes which are not uniquely orientated to any particular niche market, in contrast to most conventional HUV species. This may be advantageous, and for example, suggests that Clarias might be marketed as frozen blocks for further added value products and as a substitute for those demersal species which are less available internationally.  相似文献   

6.
The increasing number of marketable fish being supplied from aquaculture is a response to the increasing demand for healthy food and is filling the gap left by depleting natural fish stocks. Little is known about the awareness and perception of the consumer in terms of farmed fish versus fish from capture fisheries. The consumer's subjective point of view is of overriding importance for the production system and product acceptance as well as for future market success. In this paper consumer perception in Belgium is explored and compared against scientific evidence of farmed versus wild fish. Primary data were collected through a consumer survey (April 2003) and focus group discussions (May 2004) with Belgian consumers. The majority of the consumer sample reported no perceived differences between farmed versus wild fish. However, mean perception scores were slightly in favour of wild fish on the attributes taste, health and nutritious value, in particular among consumers aged 55 years and older. The availability of farmed fish was perceived to be better than that of wild fish, while the consumer's perception of safety did not differ between farmed and wild fish. The focus group discussions indicated that consumers’ opinions and beliefs about farmed fish are mainly based on emotion and image transfer from intensive terrestrial livestock production rather than on awareness and factual knowledge of aquaculture.
John Van CampEmail:
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7.
ABSTRACT

Contamination of fish feed (FF) with aflatoxigenic fungi is an ongoing hazardous risk and is the first route for transferring aflatoxins to consumers from fish products. Prevention is the gold standard to deal with microbial food contamination. Different FF samples (n = 38) were screened for the occurrence of fungal contamination, and identified Aspergillus flavus isolates were assessed for the presence of aflatoxigenic production genes (Nor-1, Ver-1, and Omt-A) and the ability to produce aflatoxins. Biocontrol of aflatoxigenic A. flavus was proposed via exposure to plant (Cinnamon bark, Athl, and Lilac leaves) smoldering fumes (PSF). Numerous fungal species were identified from FF; Aspergillus spp. was the prevalent genus, followed by Penicillium spp. and Fusarium spp. The complete set of aflatoxigenic genes was detected in 54.8% of A. flavus isolates and was correlated with their aflatoxin-producing ability. The PSF exposure was successful for inhibiting A. flavus growth in agar media and in contaminated fish feed. Cinnamon PSF was the most effective and could entirely inhibit fungal growth at a proportion of 20 g/m3 in both treatments. The PSF exposures could be suggested as effectual techniques for complete biocontrol of aflatoxigenic fungi in fish feed to protect fish and consumers from their threatening effects.  相似文献   

8.
ABSTRACT

The consumer acceptability and proximate and fatty acid composition of crayfish (Procambarus clarkii) harvested from commercial systems and moist-soil wetlands were evaluated. Aroma and appearance acceptability scores for abdominal muscles from commercial crayfish were higher over samples from moist-soil wetlands. Aroma and texture acceptability scores for whole crayfish from commercial fields were also higher compared to moist-soil wetland samples. No differences existed between treatments for flavor and overall acceptability. Results indicate that although scores for aroma were slightly higher for commercial crayfish, crayfish from both populations were acceptable to consumers. Hierarchical cluster analyses of panelists’ scores for overall acceptability revealed that 25% of panelists rated moist-soil wetland and commercial crayfish abdominal samples equally high, and an additional 31% of panelists rated moist-soil wetland crayfish samples as more liked than commercial crayfish samples. Few differences existed in crayfish proximate composition and fatty acid content from the two harvest practices.  相似文献   

9.
ABSTRACT

European consumers prefer wild over farmed aquatic food and consider it healthier and tastier. Consumers are increasingly paying attention to sustainability and welfare of farmed fish. Such expectations might be met by organic certification, but this represents a cost for the producer. It is crucial to know consumer habits about farmed aquatic food consumption and willingness to pay for certification. Data about Italian consumers’ preferences regarding farmed organic aquatic food were collected by an online questionnaire. A total of 8,657 answers were analyzed, patterns associated with demographics were investigated, and the degree of correlation among answers was calculated. The majority (75%) of family units buy less than 2 kg of farmed aquatic food per month, spending on average 20–50 €. About 40% never consume organic aquaculture products because of lack of knowledge, unavailability, and high price. Slightly over half (55%) of consumers, regardless of age, sex, and area, were willing to pay a premium price for organic-certified aquatic food, seen as antibiotic free, traceable, and sustainable. Organic food in general is well known, and distrust is the main reason that consumers avoid it, while organic aquatic food is still in its infancy, and lack of knowledge is associated with low consumption.  相似文献   

10.
This study investigates the changes in fatty acid profile of gamma irradiated frog legs (Rana esculenta) during cold (2°C) storage period. Instead of freezing the frog legs for a prolonged shelf life, gamma irradiated fresh frog legs can be used for consumer satisfaction, because consumers prefer fresh frog legs and are willing to pay more than for frozen in the European market. Frog legs were irradiated at doses of 0, 4, and 5 kGy using 60Co sources. The main fatty acids of nonirradiated and irradiated frog legs (4 and 5 kGy) were palmitic acid (C16:0), stearic acid (C18:0), oleic acid (C18:1ω9), linoleic acid (C18:2ω6), and eicosatrienoic acid (C20: 3ω3, ETE). Low doses (4 and 5 kGy) of irradiation treatment had no effect on fatty acid components of frog legs compared to the nonirradiated ones (p > 0.05). The fatty acid composition of frog meat was characterized by its high linoleic acid content (17.1–21.4%). At the initial stage of the storage, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) levels of frog legs remained unchanged with low doses of irradiation (p < 0.05). These fatty acids decreased significantly in the irradiated group (p < 0.05) at the end of the storage period. However, there were no significant changes in nonirradiated frog legs after 10 days of storage.  相似文献   

11.
The distribution of Anisakis larvae in fresh caught hake was studied, and the influence of three infection levels of the viscera (low, medium, high) on quality changes of deep frozen muscle was followed over 220 days. Differences in quality were attributed more to the size of the individuals than to the infection degree of the three groups. The removal of belly flaps diminished the risk of consumers’ infection and sensitization as prevalence and intensity was reduced to 75.6 and 5.9%, respectively. Allergens were detected after 220 days frozen storage, which represents a risk for consumers already allergic to Anisakis.  相似文献   

12.
Listeria monocytogenes presents a serious threat to consumer safety because it is resistant to various food storage techniques, including reduced or modified atmosphere packaging, refrigerated storage, and increased salt concentration. Edible coatings incorporated with natural antimicrobials have been suggested to control pathogenic and spoilage bacteria on a variety of meat products. In this study, edible zein‐based coatings incorporated with nisin and lemongrass essential oil (LGEO; 8%) were evaluated for antibacterial action against L. monocytogenes and spoilage organisms on fresh, cultured hybrid striped bass, Morone saxatilis × Morone chrysops, under two storage conditions (refrigerated or frozen) and two packaging types (polyvinyl chloride [PVC] and vacuum packing) over time. Corn‐zein‐based edible coatings were found to be an effective carrier for nisin and LGEO. Fillets coated with nisin showed the largest decrease in L. monocytogenes cell counts in both PVC and vacuum‐packaged samples in both refrigerated and frozen product, while fillets coated with LGEO showed intermediate inhibition of L. monocytogenes cell counts, with the strongest LGEO antibacterial effect being found in frozen product regardless of packaging. Both nisin and LGEO treatments were most effective in PVC‐packaged fillets compared to vacuum‐packaged fillets, but the difference in bacterial loads between packaging methods was minor. Bacterial loads on refrigerated product tended to increase slightly after 5‐d storage regardless of coating treatment or packaging, whereas bacterial loads on frozen product remained stable or decreased with time up to 60 d regardless of coating treatment or packaging. Data from the present study indicate that application of edible coatings incorporated with essential oils not only promotes food product safety but also may satisfy the preferences of consumers.  相似文献   

13.
This study investigates Greek consumers' behavior towards organic aquaculture products, identifying possible distinct consumer groups and examining possible linkages between consumer characteristics and marketing aspects of organic aquaculture. Using data from an in-person field survey, a two-step cluster analysis demonstrated different attitudes among consumers with different profiles and also identified two distinct consumer groups differentiated primarily by income: the low-potential consumers and the high-potential consumers, representing 34% and 66% of the total sample, respectively. This study provides evidence that consumers' socioeconomic and demographic characteristics are key factors determining the consumers' purchasing behavior for organic aquaculture products. Thus, a market segmentation strategy is needed to allow organic aquaculture production to take advantage of the significant potential for growth in the near future.  相似文献   

14.
Abstract

A basic premise of this review is that the traditional agricultural economics marketing research paradigm is of limited value for addressing many of the key marketing issues affecting aquaculture. These issues include how to get consumers to recognize and accept new or slightly differentiated products, and how to design products that more nearly match consumer preferences. Accordingly, we stress an ‘industrial style’ market‐development approach to aquacultural marketing research that emphasizes product differentiation and market segmentation. The focus is pragmatic in that we bring into play managerial strategies (e.g. demand‐function modification and segment development) that are integral to implementing research findings. Empirical studies pertaining to seafood demand and preference articulation are selectively reviewed to illustrate concepts and to highlight research applications.  相似文献   

15.
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16.
Atlantic salmon (Salmo salar) was grown in sea cages from 700 g to a market size of 3.2 kg on diets containing either 29% Peruvian high polyunsaturated fatty acids (PUFA) fish oil (FO) or 29% soybean oil (SO) as oil source. Chemical analyses and a triangular consumer test were performed on fresh muscle, while colour, texture and liquid holding capacity (LHC) analyses were performed on both fresh muscle, frozen muscle (stored for 3 months) and smoked salmon. The growth and chemical composition of flesh was not affected by the dietary treatment. The muscle fatty acid (FA) profile was reflected by the dietary oil source, and the amount of malondialdehyde (MDA) was threefold higher in the salmon fed FO than SO. Muscle pigment concentration was significantly different (p < 0.01) with 7.9 mg kg–1 for FO and 5.6 mg kg–1 for SO fed salmon, respectively. This result was also significantly (p < 0.05) reflected in the difference between the instrumentally measured colour of fresh, frozen and smoked muscle, and visual impressions of fresh and frozen muscle. Gaping, texture and liquid holding capacity was not affected by the dietary treatment, and the consumer panel did not detect any differences between the dietary groups. SO can be used as a dietary oil source in the grow-out phase of salmon production without sacrificing product quality in terms of texture, liquid holding capacity and consumer preference. However, a total substitution of high PUFA fish oil by SO in diets for salmon grown to market size, affects muscle colour and the FA profile significantly. (p < 0.05).  相似文献   

17.
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18.
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19.
Microcystins accumulate in aquatic organisms and can be transferred to higher trophic levels, eventually affecting vector animals and consumers. We examined three levels of an aquatic food chain (Microcystis aeruginosa, Daphnia magna and Macrobrachium rosenbergii) to identify the transfer efficiency and risk of microcystin on prawns. Samples were analysed using ultra performance liquid chromatography‐mass spectrometry (MS)/MS and microcystin‐LR (MC‐LR) distributions in prawn tissues were studied. The results showed that prawns accumulate MC‐LR both directly from M. aeruginosa and indirectly through D. magna which was pre‐exposed to M. aeruginosa. MC‐LR was detected in the gills, digestive tracts and hepatopancreas of the prawns 2 h after exposure. MC‐LR accumulated in prawns to 0.49 ± 0.04 μg g?1 dry weight in hepatopancreas within 24 h, while it was not detected in muscle samples, and rarely appeared in blood samples in such a short period. Although MC‐LR was not detected in muscle, the head including hepatopancreas of the prawns accumulated troublesome amounts of MC‐LR. These results demonstrate that microcystis blooms in prawn farming potentially pose a risk to human consumers, although prawns may be exposed to the bloom for a very short time, hence regular monitoring of blue green algae population is recommended.  相似文献   

20.
In the Abrolhos Bank (Southwest Atlantic), multidimensional indicators were used in sustainability assessments of data‐poor reef fisheries. Potential impacts, risks and stocks vulnerabilities were evaluated based on biological, environmental, social and economic aspects by combining both adapted productivity and susceptibility analysis (PSA) and scale intensity consequence analysis (SICA). Data were obtained from local surveys with stakeholders and experts and from literature. A value chain map revealed final consumers at many locations and middleman presence. Vulnerability to overexploitation ranged from low (Cephalopholis fulva (L.), Lutjanus synagris (L.) and Ocyurus chrysurus (Bloch)) to moderate (Lutjanus jocu (Bloch & Schneider), Epinephelus morio (Val.) and Mycteroperca bonaci Poey). While moderate consequences of the catches were observed to C. fulva, major consequences were identified to the other five stocks. The main threat to coral reef habitats was found to be mining wastes. Poor governance may constrain fisheries sustainability in the region, while the empowerment of fishers in both governance and post‐harvest processes should enhance it.  相似文献   

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