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dc.contributor.author
Tobke, Jesica Lis
dc.contributor.author
Bigatti, Gregorio
dc.contributor.author
Soria, Rodrigo Gaspar
dc.contributor.author
Gil, Monica Noemi
dc.date.available
2018-03-21T15:08:16Z
dc.date.issued
2017-12
dc.identifier.citation
Tobke, Jesica Lis; Bigatti, Gregorio; Soria, Rodrigo Gaspar; Gil, Monica Noemi; Ammonium removal during laboratory culture of the Tehuelche Scallop Aequipecten tehuelchus; National Shellfisheries Association; Journal Of Shellfish Research; 36; 3; 12-2017; 633-640
dc.identifier.issn
0730-8000
dc.identifier.uri
http://hdl.handle.net/11336/39484
dc.description.abstract
Laboratory-scale research involving marine bivalves maintained in recirculating or closed aquaria requires control of seawater quality parameters. Among them, the total dissolved ammonium nitrogen (TAN), NH 4 + + ammonia (NH 3 ) nitrogen, concentration is a critical parameter because of its potential toxicity, mainly in closed systems. This study assessed the efficacy of two macroalgal species collected in Golfo Nuevo (Patagonia, Argentina) in removing TAN from the seawater of experimental systems containing the Tehuelche scallop ( Aequipecten tehuelchus ). The use of the traditional nitrifying bacterial biofilter was also explored. Scallops were collected from the Gulf of San Jos e (Patagonia, Argentina) where they support an artisanal fishery of great socioeconomic importance. This resource is currently threatened by declining landings observed in the previous years, and experimental research is needed to explore the best conditions for ex situ cultivation. A 14 day-experiment was conducted in 3-L beakers containing an adult scallop with addition of a biofilter (treatment T1: containing Ulva spp.; T2: Undaria pinnatifida ; T3: bacterial biofilter; and T4: mechanical filtration before Ulva spp. addition). Negative controls (NC) (no scallop or biofiltration) and positive controls (PC) (without biofiltration) were also performed. The concentration of TAN was measured at the beginning of the experiment and every 48 h, and temporal patterns were described by regression models. Removal efficiency relative to PC was calculated on days 8 (Rd8%) and 14 (Rd14%). Ammonia concentration was estimated as a function of seawater temperature, pH, and salinity. In PC, TAN increased at a rate of 0.03 mg L – 1 h – 1 , reaching a final mean value of 9.85 mg L – 1 for total dissolved NH 4 + -N + NH 3 -N (TAN-N) (12.69 mg L – 1 TAN) and 0.15 mg L – 1 for NH 3 . In T1, TAN ranged from 0.02 to 0.22 mg L – 1 TAN-N during the first 10 days of the experiment (below those measured in PC, T2, and T3), and Rd8 and Rd14 were 98% and 84%, respectively. The highest TAN concentrations observed in the whole experiment were measured in T2, exceeding those in PC. In T3, TAN-N mean concentrations on days 8 and 14 were 1.45 mg L – 1 (Rd8 73%) and 0.45 (Rd14 95%), respectively. In T4, a linear increase of TAN was observed during the mechanical filtration period; after Ulva spp. addition, TAN decreased to levels as low as those measured in NC ( < 0.025 mg L – 1 TAN-N) until the end of the experiment (Rd14 100%). These results show that Tehuelche scallops may be relatively resistant to TAN and that NH 3 concentrations were higher than several safety standards. The seaweed Ulva spp. provided the most efficient biofilter between both tested seaweeds, and its usage would represent a good alternative for the traditional bacterial biofilter in small-scale aquaculture experiments, including long-term acclimation. This information is useful for conducting experimental assays of this overexploited artisanal scallop resource from the Patagonian coast.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
National Shellfisheries Association
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Dissolved Nitrogen
dc.subject
Biofilters
dc.subject
Seaweeds
dc.subject
Scallop
dc.subject
Aequipecten Tehuelchus
dc.subject
Aquaculture
dc.subject.classification
Agricultura
dc.subject.classification
Agricultura, Silvicultura y Pesca
dc.subject.classification
CIENCIAS AGRÍCOLAS
dc.title
Ammonium removal during laboratory culture of the Tehuelche Scallop Aequipecten tehuelchus
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-03-02T15:12:45Z
dc.identifier.eissn
1943-6319
dc.journal.volume
36
dc.journal.number
3
dc.journal.pagination
633-640
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Tobke, Jesica Lis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
dc.description.fil
Fil: Bigatti, Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; Argentina. Universidad Nacional de la Patagonia; Argentina
dc.description.fil
Fil: Soria, Rodrigo Gaspar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Universidad Nacional de la Patagonia; Argentina
dc.description.fil
Fil: Gil, Monica Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Universidad Nacional de la Patagonia; Argentina
dc.journal.title
Journal Of Shellfish Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/full/10.2983/035.036.0312
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.2983/035.036.0312


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