Risk analysis using species distribution modeling to support public policies for the alien alga Kappaphycus alvarezii aquaculture in Brazil

Castelar, Beatriz; Siqueira, Marinez Ferreira de; Sánchez‐Tapia, Andrea; Reis, Renata Perpetuo

doi:10.1016/j.aquaculture.2015.05.012

Cited by 19 publications

(10 citation statements)

References 47 publications

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“…; Reis, Caldeira, Miranda & Barros‐Barreto ). These studies did not obtain DGR similar to those for K. alvarezii , which can be cultivated in this area where there is a low risk of invasion according environment risk analysis studies (Castelar, de Siqueira, Sánchez‐Tapia & Reis ). However, as well as in south east of India (Ganesan et al .…”

Section: Discussionmentioning

confidence: 83%

“…), in areas considered of medium and high environmental risk to cultivate K. alvarezii (Castelar et al . ).…”

Section: Discussionmentioning

confidence: 97%

“…Over the past 25 years, several experiments trying to cultivate H. musciformis were conducted in southeastern Brazil (Berchez & de Oliveira 1990;Berchez et al 1993;Reis, Caldeira, Miranda & Barros-Barreto 2006). These studies did not obtain DGR similar to those for K. alvarezii, which can be cultivated in this area where there is a low risk of invasion according environment risk analysis studies (Castelar, de Siqueira, S anchez-Tapia & Reis 2015). However, as well as in south east of India (Ganesan et al 2006), H. musciformis grew well in northeastern Brazil with DGRs near 5% day À1 (Câmara-Neto 1987;Wallner et al 1992), in areas considered of medium and high environmental risk to cultivate K. alvarezii (Castelar et al 2015).…”

Section: Discussionmentioning

confidence: 99%

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Hypnea musciformis: alternative or complement to the production ofKappaphycus alvareziiintroduced in tropical countries?

et al. 2015

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Hypnea musciformis that are harvested from natural beds and introduced Kappaphycus alvarezii are the two main sources of raw material for the production of carrageenan in Brazil. The daily growth rate (DGR) and carrageenan yield (CY) of both species were evaluated in vitro and in the sea to assess the feasibility of cultivating H. musciformis as a complement or as an alternative to the production of K. alvarezii. The DGR of H. musciformis (10.8 ± 0.6% day−1) was higher than the DGR of K. alvarezii (5.6 ± 0.3% day−1) in vitro, and the CY extracted using NaOH (62.3 ± 0.15%) was better than using KOH (32.0 ± 0.3%). In eutrophic medium, the DGR of H. musciformis (9.4 ± 2.1% day−1) was higher than that of K. alvarezii (5.0 ± 1.2% day−1). However, in this condition, the CY was similar for both species (50.2 ± 3.5%), and both species were effective in removing nutrients (30% NH4+, 18% NO2− and 2.4% PO43−). H. musciformis did not survive when cultivated in the sea, neither in monospecific nor in multispecific cultivation. Moreover, K. alvarezii grew better in monospecific cultivation throughout the year (from 1.73 to 5.15% day−1) except during the wet period and the CY was high in both cultivation types (33.7–50.8%). We conclude that the cultivation of H. musciformis is not an alternative to K. alvarezii on the Brazilian southeastern coast. However, the results in vitro suggested its use as a complementary source of carrageenan or as a biological filter.

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Section: Discussionmentioning

confidence: 83%

“…), in areas considered of medium and high environmental risk to cultivate K. alvarezii (Castelar et al . ).…”

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

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Hypnea musciformis: alternative or complement to the production ofKappaphycus alvareziiintroduced in tropical countries?

et al. 2015

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“…One example of a deliberately introduced and (in certain locations) invasive species is the red seaweed Eucheuma denticulatum (Solieriaceae, Gigartinales, Rhodophyta). This tropical macroalgae grows naturally on hard substrates in Southeast Asia and East Africa and has been introduced to multiple countries for aquaculture purposes, with different environmental consequences (Conklin and Smith 2005;Chandrasekaran et al 2008;Davidson et al 2015;Castelar et al 2015). In the early 1970s, E. denticulatum was introduced to Kane'ohe Bay, Hawai'i (USA) for growth studies (Glenn and Doty 1990;Rodgers and Cox 1999;Smith et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Different environmental variables predict distribution and cover of the introduced red seaweed Eucheuma denticulatum in two geographical locations

et al. 2020

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In this study we examined abiotic and biotic factors that could potentially influence the presence of a non-indigenous seaweed, Eucheuma denticulatum, in two locations, one outside (Kane’ohe Bay, Hawai’i, USA) and one within (Mafia Island, Tanzania) its natural geographical range. We hypothesized that the availability of hard substrate and the amount of wave exposure would explain distribution patterns, and that higher abundance of herbivorous fishes in Tanzania would exert stronger top–down control than in Hawai’i. To address these hypotheses, we surveyed E. denticulatum in sites subjected to different environmental conditions and used generalized linear mixed models (GLMM) to identify predictors of E. denticulatum presence. We also estimated grazing intensity on E. denticulatum by surveying the type and the amount of grazing scars. Finally, we used molecular tools to distinguish between indigenous and non-indigenous strains of E. denticulatum on Mafia Island. In Kane’ohe Bay, the likelihood of finding E. denticulatum increased with wave exposure, whereas on Mafia Island, the likelihood increased with cover of coral rubble, and decreased with distance from areas of introduction (AOI), but this decrease was less pronounced in the presence of coral rubble. Grazing intensity was higher in Kane’ohe Bay than on Mafia Island. However, we still suggest that efforts to reduce non-indigenous E. denticulatum should include protection of important herbivores in both sites because of the high levels of grazing close to AOI. Moreover, we recommend that areas with hard substrate and high structural complexity should be avoided when farming non-indigenous strains of E. denticulatum.

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“…These activities have triggered the production of data on the capacity of the culture and its adaptation to local environmental conditions such as environmental safety of sea culture (HAYASHI et al, 2011;CASTELAR et al, 2015;CARVALHO et al, 2015) and the seasonality of production (culture occurs between September and May exclusively, due to high temperatures; low water temperature kills the tropical species) (HAYASHI et al, 2011).…”

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confidence: 99%

Novel ﬂotation model for the experimental culture of macroalgae Kappaphycus alvarezii in Florianópolis, Brazil

Santos¹,

Novaes²,

Marchiori³

et al. 2018

RAC

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A new flotation model for the experimental culture of macroalgae Kappaphycus alvarezii (Doty) Doty ex P.C. Silva is described and illustrated. The ellipsis-shaped 90L apparatus is made of medium density virgin polyethylene, measuring 2000mm long x 300mm wide x 200mm high, and weighing 9kg. The device has been successfully tested in the littoral region of the state of Santa Catarina, Brazil, throughout the experimental period. Contrastingly to traditional models available on the market, with their instability in strong sea currents, current model is an alternative to enhance algae-mollusks integrated culture, by providing stability to culture structures. It may also serve as a spacer and support for mooring of double long lines. Index terms: sea culture; flotation devices; algae; mollusks; culture technology. Novo modelo de flutuador para o cultivo experimental da macroalga Kappaphycus alvarezii em Florianópolis, Brasil Resumo-Um novo modelo de flutuador para o cultivo experimental da macroalga Kappaphycus alvarezii (Doty) Doty ex P.C. Silva é descrito e ilustrado. Confeccionado em polietileno virgem de média densidade, possui formato elíptico e dimensões de 2000 mm de comprimento x 300 mm de largura x 200 mm de altura, com volume de 90 litros e peso de 9kg. O aparato foi testado na região costeira catarinense e obteve grande êxito durante todo o período experimental. Diferentemente dos modelos tradicionalmente disponíveis no mercado, cujo principal entrave diz respeito a sua instabilidade ante as fortes correntes marinhas litorâneas, o presente modelo emerge como uma alternativa para viabilizar o cultivo integrado de algas e moluscos, oferecer estabilidade às estruturas de cultivo e servir, ao mesmo tempo, como espaçador e suporte para amarração de long lines duplos. Termos para indexação: maricultura; flutuadores; alga; moluscos; tecnologia de cultivo.

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Risk analysis using species distribution modeling to support public policies for the alien alga Kappaphycus alvarezii aquaculture in Brazil

Cited by 19 publications

References 47 publications

Hypnea musciformis: alternative or complement to the production ofKappaphycus alvareziiintroduced in tropical countries?

Hypnea musciformis: alternative or complement to the production ofKappaphycus alvareziiintroduced in tropical countries?

Different environmental variables predict distribution and cover of the introduced red seaweed Eucheuma denticulatum in two geographical locations

Novel ﬂotation model for the experimental culture of macroalgae Kappaphycus alvarezii in Florianópolis, Brazil

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