Exploring South African Pacific oyster mariculture potential through combined Earth observation and bioenergetics modelling
The combined use of satellite-derived environmental data and a dynamic energy budget (DEB) model to determine Pacific oyster growth potential was adapted for the South African marine environment. Study areas consisted of the West Coast (high-chlorophyll, low temperature) and the South Coast (variabl...
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ftdoajarticles:oai:doaj.org/article:32886281204e42bc9e689f01089d6930 2023-05-15T15:58:56+02:00 Exploring South African Pacific oyster mariculture potential through combined Earth observation and bioenergetics modelling Amalia Grace Krupandan Pierre Gernez Stephanie Palmer Yoann Thomas Laurent Barillé 2022-06-01T00:00:00Z https://doi.org/10.1016/j.aqrep.2022.101155 https://doaj.org/article/32886281204e42bc9e689f01089d6930 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S235251342200151X https://doaj.org/toc/2352-5134 2352-5134 doi:10.1016/j.aqrep.2022.101155 https://doaj.org/article/32886281204e42bc9e689f01089d6930 Aquaculture Reports, Vol 24, Iss , Pp 101155- (2022) Crassostrea gigas Dynamic Energy Budget model Earth observation Marine Spatial Planning Site selection South African aquaculture Aquaculture. Fisheries. Angling SH1-691 article 2022 ftdoajarticles https://doi.org/10.1016/j.aqrep.2022.101155 2022-12-30T21:50:05Z The combined use of satellite-derived environmental data and a dynamic energy budget (DEB) model to determine Pacific oyster growth potential was adapted for the South African marine environment. Study areas consisted of the West Coast (high-chlorophyll, low temperature) and the South Coast (variable chlorophyll, higher temperature) ecoregions. Chlorophyll-a and sea surface temperature products from the Moderate Resolution Imaging Spectroradiometer (MODIS) were used to simulate yearly growth for 18 years. Average growth performance at the end of the culture period was mapped and compared for prominent sectors. Industry-relevant growth indicators, “days to reach commercial weight” and “optimal culture period length” were also established.High growth potential was found in eastern nearshore sectors of the South Coast, particularly Plettenberg Bay, where oysters reached a median total weight (TW) of 271 g within 9 months. Other sectors in the region yielded Large commercial size within 150 days. However, South Coast growth hotspots were found to be highly variable, with transient unfavourable growth conditions leading to low flesh mass relative to TW. Growth potential was favourable in northern sectors of the West Coast, where oysters reached a median TW of up to 148 g in 9 months, Large commercial size within 200 days, and contained high flesh mass relative to TW.Current oyster production sites were not found to be optimal for growth. Higher-growth sites coincide with areas in economic decline or with high levels of poverty. However, due to constraints of applying DEB models over large spatial scales, these results are considered preliminary and await in situ verification, as well as a spatial multi-criteria analysis, before investment and development. Article in Journal/Newspaper Crassostrea gigas Pacific oyster Directory of Open Access Journals: DOAJ Articles Pacific Aquaculture Reports 24 101155 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Crassostrea gigas Dynamic Energy Budget model Earth observation Marine Spatial Planning Site selection South African aquaculture Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
Crassostrea gigas Dynamic Energy Budget model Earth observation Marine Spatial Planning Site selection South African aquaculture Aquaculture. Fisheries. Angling SH1-691 Amalia Grace Krupandan Pierre Gernez Stephanie Palmer Yoann Thomas Laurent Barillé Exploring South African Pacific oyster mariculture potential through combined Earth observation and bioenergetics modelling |
topic_facet |
Crassostrea gigas Dynamic Energy Budget model Earth observation Marine Spatial Planning Site selection South African aquaculture Aquaculture. Fisheries. Angling SH1-691 |
description |
The combined use of satellite-derived environmental data and a dynamic energy budget (DEB) model to determine Pacific oyster growth potential was adapted for the South African marine environment. Study areas consisted of the West Coast (high-chlorophyll, low temperature) and the South Coast (variable chlorophyll, higher temperature) ecoregions. Chlorophyll-a and sea surface temperature products from the Moderate Resolution Imaging Spectroradiometer (MODIS) were used to simulate yearly growth for 18 years. Average growth performance at the end of the culture period was mapped and compared for prominent sectors. Industry-relevant growth indicators, “days to reach commercial weight” and “optimal culture period length” were also established.High growth potential was found in eastern nearshore sectors of the South Coast, particularly Plettenberg Bay, where oysters reached a median total weight (TW) of 271 g within 9 months. Other sectors in the region yielded Large commercial size within 150 days. However, South Coast growth hotspots were found to be highly variable, with transient unfavourable growth conditions leading to low flesh mass relative to TW. Growth potential was favourable in northern sectors of the West Coast, where oysters reached a median TW of up to 148 g in 9 months, Large commercial size within 200 days, and contained high flesh mass relative to TW.Current oyster production sites were not found to be optimal for growth. Higher-growth sites coincide with areas in economic decline or with high levels of poverty. However, due to constraints of applying DEB models over large spatial scales, these results are considered preliminary and await in situ verification, as well as a spatial multi-criteria analysis, before investment and development. |
format |
Article in Journal/Newspaper |
author |
Amalia Grace Krupandan Pierre Gernez Stephanie Palmer Yoann Thomas Laurent Barillé |
author_facet |
Amalia Grace Krupandan Pierre Gernez Stephanie Palmer Yoann Thomas Laurent Barillé |
author_sort |
Amalia Grace Krupandan |
title |
Exploring South African Pacific oyster mariculture potential through combined Earth observation and bioenergetics modelling |
title_short |
Exploring South African Pacific oyster mariculture potential through combined Earth observation and bioenergetics modelling |
title_full |
Exploring South African Pacific oyster mariculture potential through combined Earth observation and bioenergetics modelling |
title_fullStr |
Exploring South African Pacific oyster mariculture potential through combined Earth observation and bioenergetics modelling |
title_full_unstemmed |
Exploring South African Pacific oyster mariculture potential through combined Earth observation and bioenergetics modelling |
title_sort |
exploring south african pacific oyster mariculture potential through combined earth observation and bioenergetics modelling |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://doi.org/10.1016/j.aqrep.2022.101155 https://doaj.org/article/32886281204e42bc9e689f01089d6930 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_source |
Aquaculture Reports, Vol 24, Iss , Pp 101155- (2022) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S235251342200151X https://doaj.org/toc/2352-5134 2352-5134 doi:10.1016/j.aqrep.2022.101155 https://doaj.org/article/32886281204e42bc9e689f01089d6930 |
op_doi |
https://doi.org/10.1016/j.aqrep.2022.101155 |
container_title |
Aquaculture Reports |
container_volume |
24 |
container_start_page |
101155 |
_version_ |
1766394711396843520 |