Mussels or tunicates: That is the question. Evaluating efficient and sustainable resource use by low-trophic species in aquaculture settings

Filgueira, Ramón; Strople, Leah C.; Strohmeier, Tore; Rastrick, Samuel P. S.; Strand, Øivind

doi:10.1016/j.jclepro.2019.05.173

Cited by 16 publications

(8 citation statements)

References 29 publications

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“…Mariculture concerning finfish production is dominated by salmonid aquaculture, especially Atlantic salmon (Salmo salar), which is also the most cultured carnivorous fish worldwide (Føre et al, 2018;Filgueira et al, 2019; Figure 2).…”

Section: Figure 1 |mentioning

confidence: 99%

Towards Environmental Sustainability in Marine Finfish Aquaculture

et al. 2021

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Aquaculture is one of the fastest growing food production sectors and has great potential for food security and livelihoods. However, it generates concerning consequences for the environment, including chemical and biological pollution, disease outbreaks, unsustainable feeds and competition for coastal space. Recent investigations are focusing on sustainable techniques (e.g., polyculture, offshore facilities) to improve the relationship between the industry, environment and society. This review provides an overview of the main factors of ecological concern within marine finfish aquaculture, their interactions with the environment, and highlights sustainable alternatives that are currently in use or development. Adequate environmental monitoring and location of farms, the reduction and exploitation of wastes and chemicals being used is crucial to ensure the growth and continuity of aquaculture production.

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Section: Figure 1 |mentioning

confidence: 99%

Towards Environmental Sustainability in Marine Finfish Aquaculture

et al. 2021

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“…Tunicates have been found to be even more efficient than mussels in extracting organic resources due to their lower metabolic cost and high filtration capacity. 116 Despite a high protein content (47%-53% DM), cost-efficient production is difficult to obtain due to high water content (90%-95%) and need for dewatering. Industrialscale cultivation methods for amphipods and tunicates have not yet been established and would require huge production volumes (>10-100,000 MT, w/w) to be relevant.…”

Section: Cultivation Of Marine Speciesmentioning

confidence: 99%

“…Tunicates have been found to be even more efficient than mussels in extracting organic resources due to their lower metabolic cost and high filtration capacity 116 . Despite a high protein content (47%–53% DM), cost‐efficient production is difficult to obtain due to high water content (90%–95%) and need for dewatering.…”

Section: Harvesting and Cultivation Of Marine Feed Resourcesmentioning

confidence: 99%

Future feed resources in sustainable salmonid production: A review

Albrektsen

Kortet

Skov

et al. 2022

Reviews in Aquaculture

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Aquaculture is one of the most resource-efficient and sustainable ways to produce animal protein. The Food and Agriculture Organization predicts that cultivated aquatic species will provide around 53% of the world's seafood supply by 2030.Further growth of intensive farmed aquatic species may be limited by a shortage of feed resources. The aquaculture sector therefore needs to intensify its search for alternative ingredients based on renewable natural resources. A significant increase in production will require an accelerated transition in technology and production systems, better use of natural available resources, development of high-quality alternative feed resources and exploitation of available space. The present review discusses the urgent need to identify appropriate alternative ingredients for a sustainable future salmonid production. We describe and evaluate the most promising marine ingredients, including low-trophic species (mesopelagic fish, zooplankton, polychaetes, macroalgae and crustaceans), novel microbial ingredients (bacteria, yeast and microalgae), insects (black soldier fly, yellow meal worm and crickets), animal byproducts (poultry meal, meat and bone meal, blood meal and hydrolysed feather meal) and by-products from other commercial productions (trimmings and blood). Furthermore, we discuss the available volumes and need for new processing technologies and refining methods to ensure commercial production of nutritionally healthy ingredients. The essential production steps and considerations for future development of sustainable and safe seafood production are also discussed.

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“…As the climate warms, the conditions under which tunicates thrive become more prevalent, leading to increased tunicate densities and growing challenges for local aquaculture communities 45,46 . However, it has been demonstrated that: (1) the scalable harvesting of tunicates is possible [47][48][49] and (2) high quality T-CNC can be isolated from these local invasive tunicates 10,18 . The commercial scale harvesting of tunicates could directly address the challenges of high tunicate density in local waterways.…”

mentioning

confidence: 99%

“…The commercial scale harvesting of tunicates could directly address the challenges of high tunicate density in local waterways. Easing the burden on members of the aquaculture community by harvesting tunicates for scalable T-CNC production may lead to a shift in the perception of invasive tunicates from a destructive nuisance species, to that of an abundant and available resource to be harvested and utilized 47 . Local waters surrounding PEI, along with similar marine environments worldwide with dense tunicate populations, serve as accessible sources of tunicate feedstock, with potential for scalable T-CNC isolation 49 .…”

mentioning

confidence: 99%

Towards the scalable isolation of cellulose nanocrystals from tunicates

Dunlop

Clemons

Reiner

et al. 2020

Sci Rep

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In order for sustainable nanomaterials such as cellulose nanocrystals (CNCs) to be utilized in industrial applications, a large-scale production capacity for CNCs must exist. Currently the only CNCs available commercially in kilogram scale are obtained from wood pulp (W-CNCs). Scaling the production capacity of W-CNCs isolation has led to their use in broader applications and captured the interest of researchers, industries and governments alike. Another source of CNCs with potential for commercial scale production are tunicates, a species of marine animal. Tunicate derived CNCs (T-CNCs) are a high aspect ratio CNC, which can complement commercially available W-CNCs in the growing global CNC market. Herein we report the isolation and characterization of T-CNCs from the tunicate Styela clava, an invasive species currently causing significant harm to local aquaculture communities. The reported procedure utilizes scalable CNC processing techniques and is based on our experiences from laboratory scale T-CNC isolation and pilot scale W-CNC isolation. To our best knowledge, this study represents the largest scale where T-CNCs have been isolated from any tunicate species, under any reaction conditions. Demonstrating a significant step towards commercial scale isolation of T-CNCs, and offering a potential solution to the numerous challenges which invasive tunicates pose to global aquaculture communities.

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Mussels or tunicates: That is the question. Evaluating efficient and sustainable resource use by low-trophic species in aquaculture settings

Cited by 16 publications

References 29 publications

Towards Environmental Sustainability in Marine Finfish Aquaculture

Towards Environmental Sustainability in Marine Finfish Aquaculture

Future feed resources in sustainable salmonid production: A review

Towards the scalable isolation of cellulose nanocrystals from tunicates

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