المؤلفون: Ruff, Elizabeth O., Alleway, Heidi K., Gillies, Chris L.

المصدر: Ocean & Coastal Management; Jun2023, Vol. 240, pN.PAG-N.PAG, 1p

مصطلحات موضوعية: MARICULTURE, RANCHING, AGRICULTURE, FARM buildings, SUSTAINABLE aquaculture

مصطلحات جغرافية: AUSTRALIA

مستخلص: Recent attention to the ecosystem service-generating potential of marine aquaculture (mariculture) indicates that there is substantial opportunity for marine farming to optimise practices that benefit both production and nature. One strategy for augmenting sustainability within the mariculture industry is to develop more diverse farming practices and culture species that can operate within existing ocean space constraints, contribute to ecological and conservation objectives, and assuage negative public sentiment towards mariculture. While this strategy has the potential to expand mariculture's sustainability, the implementation of these alternative culture approaches will likely depend on whether the management frameworks that regulate the industry have the authority and the capacity to enable farming innovations and encourage investment in diverse mariculture systems. Using Australia and seafloor ranching of molluscs as a case study, we explore the suitability of existing policy and legislation to support novel farming methods. We find that the policy frameworks differ across States in terms of their applicability (both implicit and explicit) to seafloor ranching activities, with substantial gaps regarding the siting and building of farming infrastructure. In the context of these results, we discuss potential strategies for leveraging existing policy and management frameworks to meet the needs of seafloor ranching and identify operational stages where new, targeted policy could be particularly impactful. Our case study offers practical insights to policymakers in Australia and other countries and regions seeking to support innovations in culture methods with a greater potential for sustainability. • Diversification can bolster sustainability within the mariculture industry. • Policy gaps could hamper operationalization of alternative farming practices. • Governance frameworks require specific consideration of alternative culture methods. • Leveraging existing policies can permit and support mariculture innovations. [ABSTRACT FROM AUTHOR]

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المؤلفون: Xu, Shaochun, Yu, Zonghe, Zhou, Yi, Yue, Shidong, Liang, Junhua, Zhang, Xiaomei

المصدر: Marine Pollution Bulletin; Feb2023, Vol. 187, pN.PAG-N.PAG, 1p

مصطلحات موضوعية: MARINE eutrophication, MARICULTURE, KELPS, TERRITORIAL waters, AGRICULTURE, LAMINARIA, MACROCYSTIS

مصطلحات جغرافية: CHINA

مستخلص: Large-scale kelp aquaculture offers several opportunities to counteract eutrophication. Here, six sites from Ailian Bay to its offshore waters in Rongcheng, northern China, were selected to investigate the spatiotemporal variations of kelp (Saccharina japonica) and seawater concentrations of C, N, and P in 2017 and 2019 in order to assess nutrient removal by kelp farming. Variations in biological parameters and elemental nutrient concentrations of whole thalli were also quantified in 2015 and 2016. We found that kelp farming in Ailian Bay can remove 1309 tons of C, 104 tons of N, and 12 tons of P. The increase of total suspended matter and nutrient concentrations from the coast to offshore waters supports the hypothesis of nutrient removal by farmed kelp. This study provides evidence of the bioremediation potential of farmed kelp. [Display omitted] • The potential of large-scale kelp farming to counteract eutrophication were evaluated. • The spatially decreasing of nutrient concentrations proves nutrient removal by kelp. • The carbon uptake by the farmed kelp does not vary between year or site in Alian Bay. • N limitation at the farmed site closest to the shore, with low exchange of seawater. • Large-scale kelp farming has a great potential for C, N and P removal. [ABSTRACT FROM AUTHOR]

: Copyright of Marine Pollution Bulletin is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Larson, Silva, Hoy, Sreynov, Thay, Somony, Rimmer, Michael A.

المصدر: Marine Policy; Feb2023, Vol. 148, pN.PAG-N.PAG, 1p

مصطلحات موضوعية: MARICULTURE, GIANT perch, AGRICULTURE, COMMUNITIES, QUALITY of service, URBAN growth

مصطلحات جغرافية: CAMBODIA

مستخلص: Finfish mariculture, dominated by production of Asian seabass (Lates calcarifer), is of high economic importance in Cambodia and is providing substantial benefits to engaged communities in coastal areas. Using semi-structured face-to-face interviews, we explore perceived barriers to engagement in the industry in three coastal districts of Cambodia where such farming is undertaken. We explore obstacles faced by current finfish mariculture value chain actors, eliciting perceptions of 56 female and male current participants. We also elicit perceptions of the industry entry restrictions by interviewing 62 men and women in the same communities, but who are currently not engaged in finfish mariculture. Specifically including men, women, youths and religion in the study sample, we also tested for potential differences in perceptions of the barriers based on demographic characteristics. The most pertinent areas for strengthening the value chain were identified by participants as: Strengthening training and technical support services; Improving availability of good quality fingerlings; Promoting compounded feeds to replace 'trash' fish; and Supporting value chain inclusivity, development and diversification. The most common obstacles to entry into the industry were reported as lack of: Finance and financial support; Security of access to land and water; Technical support services and experience; and Time and available labour. Barriers and participant needs identified in this study indicate a set of emerging priorities for both the Cambodian Fisheries Administration and the international donor community. • Finfish mariculture provides substantial benefits to coastal areas in Cambodia. • We report on industry perceptions of 118 women, men and youth. • Training, fingerlings, feed and market diversification key barriers for growth. • Lack of finance and labour, and security of access identified as barriers to entry. • Emerging priorities for government and donors proposed. [ABSTRACT FROM AUTHOR]

: Copyright of Marine Policy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)