Gracilaria chilensis outdoor tank cultivation in Chile: Use of land-based salmon culture effluents

Mora, Oscar A.; Gómez, Patricio; Böttger, M. L.; Buitano, Soledad; Retamales, Claudia A.; Vergara, Pedro A.; Gutierrez, A.

doi:10.1016/0144-8609(94)90016-7

Cited by 101 publications

(42 citation statements)

References 23 publications

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“…For example, marked seasonal changes (Friedlander et aL, 1987Ugarte & Santelices, 1992). In contrast, Buschmann et al (1994a) reported that winter favoured epiphytes, which decreased with the approach of spring and renewed growth of Gracilaria. However, seasonal abundance can vary with the epiphyte species: Enteromorpha was frequent all year, Ectocarpus only at the end of winter and diatoms appeared in spring and summer (Ugarte & Santelices 1992).…”

Section: Epiphytes and Fouling Algae In Gracilaria Cultivationmentioning

confidence: 85%

Epiphytism and fouling in Gracilaria cultivation: an overview

Fletcher

1995

J Appl Phycol

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Epiphytism is a major, world-wide problem in Gracilaria cultivation, severely reducing the productivity and cost efficiency of a diverse range of open-water and on-shore farms; the problem is especially acute in tank cultivation systems. The present paper provides an overview of the literature on epiphytism and fouling in the Gracilaria mariculture industry. Topics considered include the identity of the main epiphytes and fouling organisms, aspects of their ecology and biology which contribute towards their success as contaminants, the detrimental effects which epiphytes exert on the host plants, and the range of physical, chemical and biological control methods currently available. Recent changes in approach, with less descriptive information and more emphasis on experimental studies of Gracilaria-epiphyte interactions, are welcomed, as these offer hope for the development of improved control measures.

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Section: Epiphytes and Fouling Algae In Gracilaria Cultivationmentioning

confidence: 85%

Epiphytism and fouling in Gracilaria cultivation: an overview

Fletcher

1995

J Appl Phycol

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“…was enhanced under elevated CO 2 levels with high stocking density and irradiance. The biomass production of G. chilensis was also increased at elevated CO 2 levels or high nutrient concentrations (Buschmann et al 1994). The increase of harvest can be used as agar materials, seafood, and feed for abalone (Tseng 2001;Fei 2004;Yang et al 2015).…”

Section: Discussionmentioning

confidence: 99%

The short-term effects of elevated CO2 and ammonium concentrations on physiological responses in Gracilariopsis lemaneiformis (Rhodophyta)

et al. 2017

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Ocean acidification (OA) and coastal eutrophication affect coastal marine organisms. We studied the physiological responses of Gracilariopsis lemaneiformis (Gracilariales, Rhodophyta) to increased concentrations of CO 2 and NH 4 + . Incubation treatments were applied at two different pH units (low, 7.5; high (control), 7.9) and three different NH 4 + concentrations (low, 10; medium, 50; high, 100 μM). Growth, rates of photosynthetic oxygen evolution, and NH 4 + uptake rates were affected by both elevated CO 2 and NH 4 + conditions. The changes in the pH of culture media were influenced by elevated CO 2 or NH 4 + treatments. However, chlorophyll fluorescence was affected only by the level of NH 4 + . These results indicate that the physiological responses of G. lemaneiformis might be enhanced when the concentrations of CO 2 and NH 4 + rise. Therefore, cultures of this alga could provide a good mitigation solution against ongoing problems with OA and coastal eutrophication.

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“…The last consideration is very important: taking irradiance and temperature into account, the growth rates of S. latissima and P. palmata could not 100% correspond with the increase of nutrient releases from the growing fish in the cages (Grote et al, 2013b). The effective control of epiphytes in tank cultures has used freshwater additions, oxygen (air exposure), chemicals and other practices (Buschmann et al, 1994;Fletcher, 1995). In nearshore operations, Porphyra epiphytes have been managed by utilizing the tide that exposes the seaweeds to air, or by means of specially designed emersion/immersion systems (Oohusa, 1993), but such measures are most probably not feasible in offshore systems .…”

Section: Position Of Imta Componentsmentioning

confidence: 99%

State of the Art and Challenges for Offshore Integrated Multi-Trophic Aquaculture (IMTA)

et al. 2018

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By moving away from coastal waters and hence reducing pressure on nearshore ecosystems, offshore aquaculture can be seen as a possible step towards the large-scale expansion of marine food production. Integrated multi-trophic aquaculture (IMTA) in nearshore water bodies has received increasing attention and could therefore play a role in the transfer of aquaculture operations to offshore areas. IMTA holds scope for multi-use of offshore areas and can bring environmental benefits from making use of waste products and transforming these into valuable co-products. Furthermore, they may act as alternative marine production systems and provide scope for alternative income options for coastal communities, e.g., by acting as nodes for farm operation and maintenance requirements. This paper summarizes the current state of knowledge on the implications of the exposed nature of offshore and open ocean sites on the biological, technological and socio-economic performance of IMTA. Of particular interest is improving knowledge about resource flows between integrated species in hydrodynamic challenging conditions that characterize offshore waters.

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Gracilaria chilensis outdoor tank cultivation in Chile: Use of land-based salmon culture effluents

Cited by 101 publications

References 23 publications

Epiphytism and fouling in Gracilaria cultivation: an overview

Epiphytism and fouling in Gracilaria cultivation: an overview

The short-term effects of elevated CO2 and ammonium concentrations on physiological responses in Gracilariopsis lemaneiformis (Rhodophyta)

State of the Art and Challenges for Offshore Integrated Multi-Trophic Aquaculture (IMTA)

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