The Brown Seaweeds Fishery in Chile

Vásquez, Julio A.

doi:10.5772/62876

Cited by 17 publications

(18 citation statements)

References 42 publications

(86 reference statements)

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“…Therefore, we should interpret the impacts of kelp fishery carefully. Kelps commercial value is high, with Chile being one of the main exploiters of kelp natural populations 66 . Kelp extraction in Chile is managed but hardly supervised 66 .…”

Section: Discussionmentioning

confidence: 99%

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Alteration of coastal productivity and artisanal fisheries interact to affect a marine food web

Ávila‐Thieme

Corcoran

Pérez‐Matus

et al. 2021

Sci Rep

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Top-down and bottom-up forces determine ecosystem function and dynamics. Fisheries as a top-down force can shorten and destabilize food webs, while effects driven by climate change can alter the bottom-up forces of primary productivity. We assessed the response of a highly-resolved intertidal food web to these two global change drivers, using network analysis and bioenergetic modelling. We quantified the relative importance of artisanal fisheries as another predator species, and evaluated the independent and combined effects of fisheries and changes in plankton productivity on food web dynamics. The food web was robust to the loss of all harvested species but sensitive to the decline in plankton productivity. Interestingly, fisheries dampened the negative impacts of decreasing plankton productivity on non-harvested species by reducing the predation pressure of harvested consumers on non-harvested resources, and reducing the interspecific competition between harvested and non-harvested basal species. In contrast, the decline in plankton productivity increased the sensitivity of harvested species to fishing by reducing the total productivity of the food web. Our results show that strategies for new scenarios caused by climate change are needed to protect marine ecosystems and the wellbeing of local communities dependent on their resources.

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Section: Discussionmentioning

confidence: 99%

“…Kelps commercial value is high, with Chile being one of the main exploiters of kelp natural populations 66 . Kelp extraction in Chile is managed but hardly supervised 66 . Therefore, kelp’s high demand, high value, and low control, leave these algae prone to illegal fishing.…”

Section: Discussionmentioning

confidence: 99%

Alteration of coastal productivity and artisanal fisheries interact to affect a marine food web

Ávila‐Thieme

Corcoran

Pérez‐Matus

et al. 2021

Sci Rep

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“…Kelp provides habitat structure and shelter to many species 12 and via this non-trophic interaction, it promotes the biodiversity of coastal ecosystems 54 . Its commercial value is also high, with Chile being one of the main exploiters of kelp natural populations 55 . Kelp extraction in Chile is managed but hardly supervised 55 .…”

Section: Discussionmentioning

confidence: 99%

“…Its commercial value is also high, with Chile being one of the main exploiters of kelp natural populations 55 . Kelp extraction in Chile is managed but hardly supervised 55 . Therefore, kelp’s high demand, high value, and low control, leave these algae prone to illegal fishing.…”

Section: Discussionmentioning

confidence: 99%

Alteration of coastal productivity and artisanal fisheries interact to affect a marine food-web

Ávila‐Thieme

Corcoran

Pérez‐Matus

et al. 2020

Preprint

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Top-down and bottom-up forces determine ecosystem function and dynamics. Fisheries as a top-down force can shorten and destabilize food-webs, while climate-change driven effects can alter the bottom-up forces of primary productivity. We assessed the response of a highly-resolved intertidal food-web to these two global-change drivers, using network analysis and bioenergetic modelling. We quantified the relative importance of artisanal fisheries as another predator species, and evaluated the independent and combined effects of fisheries and plankton-productivity changes on food-web dynamics. The food-web was robust to the loss of all harvested species but sensible to plankton-productivity decline. Interestingly, fisheries dampened the negative impacts of decreasing plankton productivity on non-harvested species, while plankton-productivity decline increased the sensitivity of harvested species to fishing. Our results show that strategies for new scenarios caused by climate change are needed to protect marine ecosystems and the wellbeing of local communities dependent on their resources.

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“…In summary, regardless of the species (D. incurvata and L. spicata) and area (Las Cruces and Niebla), the holdfast showed the highest TPC and AC values. Hence, according to bioecological recommendations for a sustainable seaweed fishery, the entire alga's utilization, including the holdfast, is suggested in order to recover the most phlorotannins from these species [43].…”

Section: Effect Of the Species Harvesting Area And Thallus Part Used On The Tpc And Ac Of D Incurvata And L Spicatamentioning

confidence: 99%

Pressurized Hot Liquid Extraction with 15% v/v Glycerol-Water as An Effective Environment-Friendly Process to Obtain Durvillaea incurvata and Lessonia spicata Phlorotannin Extracts with Antioxidant and Antihyperglycemic Potential

et al. 2021

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Brown seaweed phlorotannins have shown the potential to promote several health benefits. Durvillaea incurvata and Lessonia spicata—species that are widely distributed in central and southern Chile—were investigated to obtain phlorotannin extracts with antioxidant and antihyperglycemic potential. The use of an environmentally friendly and food-grade glycerol-based pressurized hot liquid extraction (PHLE) process (15% v/v glycerol water) was assessed for the first time to obtain phlorotannins. Multiple effects were analyzed, including the effect of the species, harvesting area (Las Cruces and Niebla), and anatomical part (holdfast, stipe, and frond) on the extracts’ polyphenol content (TPC), antioxidant capacity (AC), and carbohydrate-hydrolyzing enzyme—α-glucosidase and α-amylase—inhibitory activity. Contaminants, such as mannitol, heavy metals (As, Cd, Pb, Hg, and Sn), and 5-hydroxymethylfurfural (HMF), were also determined. The anatomical part used demonstrated a significant impact on the extracts’ TPC and AC, with holdfasts showing the highest values (TPC: 95 ± 24 mg phloroglucinol equivalents/g dry extract; DPPH: 400 ± 140 μmol Trolox equivalents/g dry extract; ORAC: 560 ± 130 μmol TE/g dry extract). Accordingly, holdfast extracts presented the most potent α-glucosidase inhibition, with D. incurvata from Niebla showing an activity equivalent to fifteen times that of acarbose. Only one frond and stipe extract showed significant α-glucosidase inhibitory capacity. No α-amylase inhibition was found in any extract. Although no HMF was detected, potentially hazardous cadmium levels (over the French limit) and substantial mannitol concentrations—reaching up to 50% of the extract dry weight—were found in most seaweed samples and extracts. Therefore, further purification steps are suggested if food or pharmaceutical applications are intended for the seaweed PHLE extracts obtained in this study.

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The Brown Seaweeds Fishery in Chile

Cited by 17 publications

References 42 publications

Alteration of coastal productivity and artisanal fisheries interact to affect a marine food web

Alteration of coastal productivity and artisanal fisheries interact to affect a marine food web

Alteration of coastal productivity and artisanal fisheries interact to affect a marine food-web

Pressurized Hot Liquid Extraction with 15% v/v Glycerol-Water as An Effective Environment-Friendly Process to Obtain Durvillaea incurvata and Lessonia spicata Phlorotannin Extracts with Antioxidant and Antihyperglycemic Potential

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