Weight ratios of the kelps, Alaria esculenta and Saccharina latissima, required to sequester dissolved inorganic nutrients and supply oxygen for Atlantic salmon, Salmo salar, in Integrated Multi-Trophic Aquaculture systems

Estimates of seaweed nutrient sequestration ability in open-water, Integrated Multi-Trophic Aquaculture (IMTA) required to ‘balance’ nutrients from fish cages have typically assigned a specific nutrient load for a specific fish biomass. The resultant culture area and densities of seaweeds required f...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Aquaculture 2013-09, Vol.408-409, p.34-46
Hauptverfasser: Reid, G.K., Chopin, T., Robinson, S.M.C., Azevedo, P., Quinton, M., Belyea, E.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page 46
container_issue
container_start_page 34
container_title Aquaculture
container_volume 408-409
creator Reid, G.K.
Chopin, T.
Robinson, S.M.C.
Azevedo, P.
Quinton, M.
Belyea, E.
description Estimates of seaweed nutrient sequestration ability in open-water, Integrated Multi-Trophic Aquaculture (IMTA) required to ‘balance’ nutrients from fish cages have typically assigned a specific nutrient load for a specific fish biomass. The resultant culture area and densities of seaweeds required for full equivalent nutrient sequestration may have meaning only to experienced aquaculturists. Consequently, a novel ratio model is proposed which determines the weight ratio of harvested seaweeds required to sequester an equivalent weight of soluble inorganic nutrients loaded per unit growth of fish. Soluble inorganic nutrient excretion from Atlantic salmon, Salmo salar, was estimated using a semi-stochastic nutritional mass balance approach. Oxygen demand was estimated using respiratory quotients. Nutrient contents of the IMTA kelps, Alaria esculenta and Saccharina latissima, were measured at harvest times, and net oxygen production was estimated using the photosynthetic equation. To quantify uncertainty, input parameters were assigned theoretical distributions (based on empirical or literature data) and the model was run using a stratified sampling approach (Latin Hypercube) over multiple iterations, to generate distributions of weight ratios for the various nutrients. A mathematical simulation of nutrient loading from a salmon farm over a full production cycle was estimated using mean loading values per unit growth, with monthly growth estimated by a thermal growth coefficient (TGC). Results showed that one kilogramme of Atlantic salmon growth (large fish fed a typical commercial feed, ±standard deviation) resulted in the excretion of 29.49±4.20g nitrogen, 2.26±2.25g phosphorus and the respiration of 243.38±48.28g carbon. Dissolved oxygen requirements for 1kg of growth were 455.29±86.24g. Salmon smolts placed in cages in spring and harvested 21months later, load approximately 4 times more nutrients in the second grow-out season. The mean ratios of A. esculenta weight required to sequester nutrients excreted per unit weight of S. salar production were 6.7(±1.5):1 for nitrogen, 4.8(±3.0):1 for phosphorus, and 5.8(±1.4):1 for carbon. Oxygen could be supplied at a weight ratio of 4.1(±1.0):1. The mean ratios of S. latissima were 12.9(±2.7):1 for nitrogen, 10.5(±6.2):1 for phosphorus, and 10.2(±2.2):1 for carbon. Oxygen could be supplied at a weight ratio of 7.2(±1.5):1. A. esculenta appears to have almost twice the nutrient sequestration capacity per wet weight
doi_str_mv 10.1016/j.aquaculture.2013.05.004
format Article
fullrecord <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_1425509610</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0044848613002251</els_id><sourcerecordid>3047672101</sourcerecordid><originalsourceid>FETCH-LOGICAL-c403t-17eb9783fb8e39f36a0a24eaea3367440515629e06e3ec078b4dafd32291438d3</originalsourceid><addsrcrecordid>eNqNUU1vEzEQXSGQCIXfgBHilg322vt1jKIClYo4tBVHa-Kd3Ths7K3trcif5bcwaSrgyMn2-M17M-9l2TvBV4KL6uN-BfczmHlMc8BVwYVc8XLFuXqWLURTy7ysiuJ5tqCKyhvVVC-zVzHuOedVVYpF9us72mGXWIBkfWS-Z2mH7AeOU1yy9QjBAsNI_OgSMHAduwFjdlR3wEZqitEeYMkC3s82YMeSZ5HuGBMG1tG3Hx-obJ0PAzhrmJtTsMQWH9niPE3jkfmfxwEd631g6zSCSwSMMB68W5IgnacXhCXxsCuXcKB5ifUr7W3z2-CnHTWs_zrB4pEGOMTX2Ysexohvns6L7O7T5e3mS3797fPVZn2dG8VlykWN27ZuZL9tULa9rIBDoRAQpKxqpXgpyMcWeYUSDa-breqg72RRtELJppMX2fsz7xT84_J67-fgSFILVZQlbyvBCdWeUSb4GAP2egrkXjhqwfUpTr3X_8SpT3FqXmoKj3o_PClANDD2AZyx8Q9BUde8IAnCvT3jevAahkCYuxsiUpyLuqikIMTmjEAy5MFi0NFQIAY7CtAk3Xn7H_P8BvI2yw4</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1425509610</pqid></control><display><type>article</type><title>Weight ratios of the kelps, Alaria esculenta and Saccharina latissima, required to sequester dissolved inorganic nutrients and supply oxygen for Atlantic salmon, Salmo salar, in Integrated Multi-Trophic Aquaculture systems</title><source>ScienceDirect Journals (5 years ago - present)</source><creator>Reid, G.K. ; Chopin, T. ; Robinson, S.M.C. ; Azevedo, P. ; Quinton, M. ; Belyea, E.</creator><creatorcontrib>Reid, G.K. ; Chopin, T. ; Robinson, S.M.C. ; Azevedo, P. ; Quinton, M. ; Belyea, E.</creatorcontrib><description>Estimates of seaweed nutrient sequestration ability in open-water, Integrated Multi-Trophic Aquaculture (IMTA) required to ‘balance’ nutrients from fish cages have typically assigned a specific nutrient load for a specific fish biomass. The resultant culture area and densities of seaweeds required for full equivalent nutrient sequestration may have meaning only to experienced aquaculturists. Consequently, a novel ratio model is proposed which determines the weight ratio of harvested seaweeds required to sequester an equivalent weight of soluble inorganic nutrients loaded per unit growth of fish. Soluble inorganic nutrient excretion from Atlantic salmon, Salmo salar, was estimated using a semi-stochastic nutritional mass balance approach. Oxygen demand was estimated using respiratory quotients. Nutrient contents of the IMTA kelps, Alaria esculenta and Saccharina latissima, were measured at harvest times, and net oxygen production was estimated using the photosynthetic equation. To quantify uncertainty, input parameters were assigned theoretical distributions (based on empirical or literature data) and the model was run using a stratified sampling approach (Latin Hypercube) over multiple iterations, to generate distributions of weight ratios for the various nutrients. A mathematical simulation of nutrient loading from a salmon farm over a full production cycle was estimated using mean loading values per unit growth, with monthly growth estimated by a thermal growth coefficient (TGC). Results showed that one kilogramme of Atlantic salmon growth (large fish fed a typical commercial feed, ±standard deviation) resulted in the excretion of 29.49±4.20g nitrogen, 2.26±2.25g phosphorus and the respiration of 243.38±48.28g carbon. Dissolved oxygen requirements for 1kg of growth were 455.29±86.24g. Salmon smolts placed in cages in spring and harvested 21months later, load approximately 4 times more nutrients in the second grow-out season. The mean ratios of A. esculenta weight required to sequester nutrients excreted per unit weight of S. salar production were 6.7(±1.5):1 for nitrogen, 4.8(±3.0):1 for phosphorus, and 5.8(±1.4):1 for carbon. Oxygen could be supplied at a weight ratio of 4.1(±1.0):1. The mean ratios of S. latissima were 12.9(±2.7):1 for nitrogen, 10.5(±6.2):1 for phosphorus, and 10.2(±2.2):1 for carbon. Oxygen could be supplied at a weight ratio of 7.2(±1.5):1. A. esculenta appears to have almost twice the nutrient sequestration capacity per wet weight than S. latissima. However, culture densities of S. latissima are 1.5 times greater than those for A. esculenta and when spatially weighted this difference is reduced to 1–1.5 times. Numbers of rafts for both kelp species required for full nutrient sequestration from a commercial scale salmon farm exceed the number of rafts which can be practically deployed within a typical site lease area. However, not all inorganic nutrients from cultured fish will be available to IMTA seaweeds, nor should 100% nutrient sequestration need be the only successful endpoint in such systems. These aspects should be considered when assessing the net value of kelps in open-water IMTA systems.</description><identifier>ISSN: 0044-8486</identifier><identifier>EISSN: 1873-5622</identifier><identifier>DOI: 10.1016/j.aquaculture.2013.05.004</identifier><identifier>CODEN: AQCLAL</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Agnatha. Pisces ; Alaria ; Algae ; Animal aquaculture ; animal growth ; Animal productions ; Aquaculture ; aquaculture systems ; Biological and medical sciences ; Biomass ; carbon ; dissolved oxygen ; equations ; excretion ; farmed fish ; feeds ; fish cages ; fish farms ; fish feeding ; Fundamental and applied biological sciences. Psychology ; General aspects ; harvest date ; Integrated Multi-Trophic Aquaculture (IMTA) ; Latin Hypercube ; leasing ; macroalgae ; Mass balance ; nitrogen ; nutrient balance ; nutrient content ; nutrients ; Oxygen ; oxygen requirement ; Phosphorus ; Pisciculture ; pollution load ; respiratory quotient ; Saccharina ; Salmo salar ; Salmon ; Salmon farming ; Seaweeds ; smolts ; spring ; Thermal growth coefficient (TGC) ; uncertainty ; Vertebrate aquaculture ; Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution ; weight loss</subject><ispartof>Aquaculture, 2013-09, Vol.408-409, p.34-46</ispartof><rights>2013 Elsevier B.V.</rights><rights>2014 INIST-CNRS</rights><rights>Copyright Elsevier Sequoia S.A. Sep 15, 2013</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c403t-17eb9783fb8e39f36a0a24eaea3367440515629e06e3ec078b4dafd32291438d3</citedby><cites>FETCH-LOGICAL-c403t-17eb9783fb8e39f36a0a24eaea3367440515629e06e3ec078b4dafd32291438d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.aquaculture.2013.05.004$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27923,27924,45994</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=27702103$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Reid, G.K.</creatorcontrib><creatorcontrib>Chopin, T.</creatorcontrib><creatorcontrib>Robinson, S.M.C.</creatorcontrib><creatorcontrib>Azevedo, P.</creatorcontrib><creatorcontrib>Quinton, M.</creatorcontrib><creatorcontrib>Belyea, E.</creatorcontrib><title>Weight ratios of the kelps, Alaria esculenta and Saccharina latissima, required to sequester dissolved inorganic nutrients and supply oxygen for Atlantic salmon, Salmo salar, in Integrated Multi-Trophic Aquaculture systems</title><title>Aquaculture</title><description>Estimates of seaweed nutrient sequestration ability in open-water, Integrated Multi-Trophic Aquaculture (IMTA) required to ‘balance’ nutrients from fish cages have typically assigned a specific nutrient load for a specific fish biomass. The resultant culture area and densities of seaweeds required for full equivalent nutrient sequestration may have meaning only to experienced aquaculturists. Consequently, a novel ratio model is proposed which determines the weight ratio of harvested seaweeds required to sequester an equivalent weight of soluble inorganic nutrients loaded per unit growth of fish. Soluble inorganic nutrient excretion from Atlantic salmon, Salmo salar, was estimated using a semi-stochastic nutritional mass balance approach. Oxygen demand was estimated using respiratory quotients. Nutrient contents of the IMTA kelps, Alaria esculenta and Saccharina latissima, were measured at harvest times, and net oxygen production was estimated using the photosynthetic equation. To quantify uncertainty, input parameters were assigned theoretical distributions (based on empirical or literature data) and the model was run using a stratified sampling approach (Latin Hypercube) over multiple iterations, to generate distributions of weight ratios for the various nutrients. A mathematical simulation of nutrient loading from a salmon farm over a full production cycle was estimated using mean loading values per unit growth, with monthly growth estimated by a thermal growth coefficient (TGC). Results showed that one kilogramme of Atlantic salmon growth (large fish fed a typical commercial feed, ±standard deviation) resulted in the excretion of 29.49±4.20g nitrogen, 2.26±2.25g phosphorus and the respiration of 243.38±48.28g carbon. Dissolved oxygen requirements for 1kg of growth were 455.29±86.24g. Salmon smolts placed in cages in spring and harvested 21months later, load approximately 4 times more nutrients in the second grow-out season. The mean ratios of A. esculenta weight required to sequester nutrients excreted per unit weight of S. salar production were 6.7(±1.5):1 for nitrogen, 4.8(±3.0):1 for phosphorus, and 5.8(±1.4):1 for carbon. Oxygen could be supplied at a weight ratio of 4.1(±1.0):1. The mean ratios of S. latissima were 12.9(±2.7):1 for nitrogen, 10.5(±6.2):1 for phosphorus, and 10.2(±2.2):1 for carbon. Oxygen could be supplied at a weight ratio of 7.2(±1.5):1. A. esculenta appears to have almost twice the nutrient sequestration capacity per wet weight than S. latissima. However, culture densities of S. latissima are 1.5 times greater than those for A. esculenta and when spatially weighted this difference is reduced to 1–1.5 times. Numbers of rafts for both kelp species required for full nutrient sequestration from a commercial scale salmon farm exceed the number of rafts which can be practically deployed within a typical site lease area. However, not all inorganic nutrients from cultured fish will be available to IMTA seaweeds, nor should 100% nutrient sequestration need be the only successful endpoint in such systems. These aspects should be considered when assessing the net value of kelps in open-water IMTA systems.</description><subject>Agnatha. Pisces</subject><subject>Alaria</subject><subject>Algae</subject><subject>Animal aquaculture</subject><subject>animal growth</subject><subject>Animal productions</subject><subject>Aquaculture</subject><subject>aquaculture systems</subject><subject>Biological and medical sciences</subject><subject>Biomass</subject><subject>carbon</subject><subject>dissolved oxygen</subject><subject>equations</subject><subject>excretion</subject><subject>farmed fish</subject><subject>feeds</subject><subject>fish cages</subject><subject>fish farms</subject><subject>fish feeding</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General aspects</subject><subject>harvest date</subject><subject>Integrated Multi-Trophic Aquaculture (IMTA)</subject><subject>Latin Hypercube</subject><subject>leasing</subject><subject>macroalgae</subject><subject>Mass balance</subject><subject>nitrogen</subject><subject>nutrient balance</subject><subject>nutrient content</subject><subject>nutrients</subject><subject>Oxygen</subject><subject>oxygen requirement</subject><subject>Phosphorus</subject><subject>Pisciculture</subject><subject>pollution load</subject><subject>respiratory quotient</subject><subject>Saccharina</subject><subject>Salmo salar</subject><subject>Salmon</subject><subject>Salmon farming</subject><subject>Seaweeds</subject><subject>smolts</subject><subject>spring</subject><subject>Thermal growth coefficient (TGC)</subject><subject>uncertainty</subject><subject>Vertebrate aquaculture</subject><subject>Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution</subject><subject>weight loss</subject><issn>0044-8486</issn><issn>1873-5622</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqNUU1vEzEQXSGQCIXfgBHilg322vt1jKIClYo4tBVHa-Kd3Ths7K3trcif5bcwaSrgyMn2-M17M-9l2TvBV4KL6uN-BfczmHlMc8BVwYVc8XLFuXqWLURTy7ysiuJ5tqCKyhvVVC-zVzHuOedVVYpF9us72mGXWIBkfWS-Z2mH7AeOU1yy9QjBAsNI_OgSMHAduwFjdlR3wEZqitEeYMkC3s82YMeSZ5HuGBMG1tG3Hx-obJ0PAzhrmJtTsMQWH9niPE3jkfmfxwEd631g6zSCSwSMMB68W5IgnacXhCXxsCuXcKB5ifUr7W3z2-CnHTWs_zrB4pEGOMTX2Ysexohvns6L7O7T5e3mS3797fPVZn2dG8VlykWN27ZuZL9tULa9rIBDoRAQpKxqpXgpyMcWeYUSDa-breqg72RRtELJppMX2fsz7xT84_J67-fgSFILVZQlbyvBCdWeUSb4GAP2egrkXjhqwfUpTr3X_8SpT3FqXmoKj3o_PClANDD2AZyx8Q9BUde8IAnCvT3jevAahkCYuxsiUpyLuqikIMTmjEAy5MFi0NFQIAY7CtAk3Xn7H_P8BvI2yw4</recordid><startdate>20130915</startdate><enddate>20130915</enddate><creator>Reid, G.K.</creator><creator>Chopin, T.</creator><creator>Robinson, S.M.C.</creator><creator>Azevedo, P.</creator><creator>Quinton, M.</creator><creator>Belyea, E.</creator><general>Elsevier B.V</general><general>Elsevier</general><general>Elsevier Sequoia S.A</general><scope>FBQ</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QL</scope><scope>7QR</scope><scope>7ST</scope><scope>7TN</scope><scope>7U7</scope><scope>7U9</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H94</scope><scope>H95</scope><scope>H98</scope><scope>H99</scope><scope>L.F</scope><scope>L.G</scope><scope>M7N</scope><scope>P64</scope><scope>SOI</scope></search><sort><creationdate>20130915</creationdate><title>Weight ratios of the kelps, Alaria esculenta and Saccharina latissima, required to sequester dissolved inorganic nutrients and supply oxygen for Atlantic salmon, Salmo salar, in Integrated Multi-Trophic Aquaculture systems</title><author>Reid, G.K. ; Chopin, T. ; Robinson, S.M.C. ; Azevedo, P. ; Quinton, M. ; Belyea, E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c403t-17eb9783fb8e39f36a0a24eaea3367440515629e06e3ec078b4dafd32291438d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Agnatha. Pisces</topic><topic>Alaria</topic><topic>Algae</topic><topic>Animal aquaculture</topic><topic>animal growth</topic><topic>Animal productions</topic><topic>Aquaculture</topic><topic>aquaculture systems</topic><topic>Biological and medical sciences</topic><topic>Biomass</topic><topic>carbon</topic><topic>dissolved oxygen</topic><topic>equations</topic><topic>excretion</topic><topic>farmed fish</topic><topic>feeds</topic><topic>fish cages</topic><topic>fish farms</topic><topic>fish feeding</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>General aspects</topic><topic>harvest date</topic><topic>Integrated Multi-Trophic Aquaculture (IMTA)</topic><topic>Latin Hypercube</topic><topic>leasing</topic><topic>macroalgae</topic><topic>Mass balance</topic><topic>nitrogen</topic><topic>nutrient balance</topic><topic>nutrient content</topic><topic>nutrients</topic><topic>Oxygen</topic><topic>oxygen requirement</topic><topic>Phosphorus</topic><topic>Pisciculture</topic><topic>pollution load</topic><topic>respiratory quotient</topic><topic>Saccharina</topic><topic>Salmo salar</topic><topic>Salmon</topic><topic>Salmon farming</topic><topic>Seaweeds</topic><topic>smolts</topic><topic>spring</topic><topic>Thermal growth coefficient (TGC)</topic><topic>uncertainty</topic><topic>Vertebrate aquaculture</topic><topic>Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution</topic><topic>weight loss</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Reid, G.K.</creatorcontrib><creatorcontrib>Chopin, T.</creatorcontrib><creatorcontrib>Robinson, S.M.C.</creatorcontrib><creatorcontrib>Azevedo, P.</creatorcontrib><creatorcontrib>Quinton, M.</creatorcontrib><creatorcontrib>Belyea, E.</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Chemoreception Abstracts</collection><collection>Environment Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Toxicology Abstracts</collection><collection>Virology and AIDS Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 1: Biological Sciences &amp; Living Resources</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Aquaculture Abstracts</collection><collection>ASFA: Marine Biotechnology Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Marine Biotechnology Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environment Abstracts</collection><jtitle>Aquaculture</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Reid, G.K.</au><au>Chopin, T.</au><au>Robinson, S.M.C.</au><au>Azevedo, P.</au><au>Quinton, M.</au><au>Belyea, E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Weight ratios of the kelps, Alaria esculenta and Saccharina latissima, required to sequester dissolved inorganic nutrients and supply oxygen for Atlantic salmon, Salmo salar, in Integrated Multi-Trophic Aquaculture systems</atitle><jtitle>Aquaculture</jtitle><date>2013-09-15</date><risdate>2013</risdate><volume>408-409</volume><spage>34</spage><epage>46</epage><pages>34-46</pages><issn>0044-8486</issn><eissn>1873-5622</eissn><coden>AQCLAL</coden><abstract>Estimates of seaweed nutrient sequestration ability in open-water, Integrated Multi-Trophic Aquaculture (IMTA) required to ‘balance’ nutrients from fish cages have typically assigned a specific nutrient load for a specific fish biomass. The resultant culture area and densities of seaweeds required for full equivalent nutrient sequestration may have meaning only to experienced aquaculturists. Consequently, a novel ratio model is proposed which determines the weight ratio of harvested seaweeds required to sequester an equivalent weight of soluble inorganic nutrients loaded per unit growth of fish. Soluble inorganic nutrient excretion from Atlantic salmon, Salmo salar, was estimated using a semi-stochastic nutritional mass balance approach. Oxygen demand was estimated using respiratory quotients. Nutrient contents of the IMTA kelps, Alaria esculenta and Saccharina latissima, were measured at harvest times, and net oxygen production was estimated using the photosynthetic equation. To quantify uncertainty, input parameters were assigned theoretical distributions (based on empirical or literature data) and the model was run using a stratified sampling approach (Latin Hypercube) over multiple iterations, to generate distributions of weight ratios for the various nutrients. A mathematical simulation of nutrient loading from a salmon farm over a full production cycle was estimated using mean loading values per unit growth, with monthly growth estimated by a thermal growth coefficient (TGC). Results showed that one kilogramme of Atlantic salmon growth (large fish fed a typical commercial feed, ±standard deviation) resulted in the excretion of 29.49±4.20g nitrogen, 2.26±2.25g phosphorus and the respiration of 243.38±48.28g carbon. Dissolved oxygen requirements for 1kg of growth were 455.29±86.24g. Salmon smolts placed in cages in spring and harvested 21months later, load approximately 4 times more nutrients in the second grow-out season. The mean ratios of A. esculenta weight required to sequester nutrients excreted per unit weight of S. salar production were 6.7(±1.5):1 for nitrogen, 4.8(±3.0):1 for phosphorus, and 5.8(±1.4):1 for carbon. Oxygen could be supplied at a weight ratio of 4.1(±1.0):1. The mean ratios of S. latissima were 12.9(±2.7):1 for nitrogen, 10.5(±6.2):1 for phosphorus, and 10.2(±2.2):1 for carbon. Oxygen could be supplied at a weight ratio of 7.2(±1.5):1. A. esculenta appears to have almost twice the nutrient sequestration capacity per wet weight than S. latissima. However, culture densities of S. latissima are 1.5 times greater than those for A. esculenta and when spatially weighted this difference is reduced to 1–1.5 times. Numbers of rafts for both kelp species required for full nutrient sequestration from a commercial scale salmon farm exceed the number of rafts which can be practically deployed within a typical site lease area. However, not all inorganic nutrients from cultured fish will be available to IMTA seaweeds, nor should 100% nutrient sequestration need be the only successful endpoint in such systems. These aspects should be considered when assessing the net value of kelps in open-water IMTA systems.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.aquaculture.2013.05.004</doi><tpages>13</tpages></addata></record>
fulltext fulltext
identifier ISSN: 0044-8486
ispartof Aquaculture, 2013-09, Vol.408-409, p.34-46
issn 0044-8486
1873-5622
language eng
recordid cdi_proquest_journals_1425509610
source ScienceDirect Journals (5 years ago - present)
subjects Agnatha. Pisces
Alaria
Algae
Animal aquaculture
animal growth
Animal productions
Aquaculture
aquaculture systems
Biological and medical sciences
Biomass
carbon
dissolved oxygen
equations
excretion
farmed fish
feeds
fish cages
fish farms
fish feeding
Fundamental and applied biological sciences. Psychology
General aspects
harvest date
Integrated Multi-Trophic Aquaculture (IMTA)
Latin Hypercube
leasing
macroalgae
Mass balance
nitrogen
nutrient balance
nutrient content
nutrients
Oxygen
oxygen requirement
Phosphorus
Pisciculture
pollution load
respiratory quotient
Saccharina
Salmo salar
Salmon
Salmon farming
Seaweeds
smolts
spring
Thermal growth coefficient (TGC)
uncertainty
Vertebrate aquaculture
Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
weight loss
title Weight ratios of the kelps, Alaria esculenta and Saccharina latissima, required to sequester dissolved inorganic nutrients and supply oxygen for Atlantic salmon, Salmo salar, in Integrated Multi-Trophic Aquaculture systems
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-12T02%3A11%3A43IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Weight%20ratios%20of%20the%20kelps,%20Alaria%20esculenta%20and%20Saccharina%20latissima,%20required%20to%20sequester%20dissolved%20inorganic%20nutrients%20and%20supply%20oxygen%20for%20Atlantic%20salmon,%20Salmo%20salar,%20in%20Integrated%20Multi-Trophic%20Aquaculture%20systems&rft.jtitle=Aquaculture&rft.au=Reid,%20G.K.&rft.date=2013-09-15&rft.volume=408-409&rft.spage=34&rft.epage=46&rft.pages=34-46&rft.issn=0044-8486&rft.eissn=1873-5622&rft.coden=AQCLAL&rft_id=info:doi/10.1016/j.aquaculture.2013.05.004&rft_dat=%3Cproquest_cross%3E3047672101%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1425509610&rft_id=info:pmid/&rft_els_id=S0044848613002251&rfr_iscdi=true