Genetic diversity of the causative agent of ice-ice disease of the seaweed<i>Kappaphycus alvarezii</i>from Karimunjawa island, Indonesia

Syafitri, Emmy; Prayitno, Slamet Budi; Ma’ruf, Widodo Farid; Radjasa, Ocky Karna

doi:10.1088/1755-1315/55/1/012044

Cited by 17 publications

(13 citation statements)

References 17 publications

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“…DOI:10.1016/j.carbpol.2019.115191 a seaweed cultivation region begins with changes in thallus that are experiencing stress, followed by bleaching and ultimately thallus damage. Stress characterized by changes in the color of the thallus is an early symptom of seaweed that has a disruption of ice-ice disease, along with the maintenance of the thallus tip turns white and finally porous (Sulu et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

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2020

Hidrobiológica

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al conocimiento de este grupo en la región. Métodos: Los muestreos se realizaron empleando diversas artes de pesca, en los principales ríos y tributarios que se encuentran en el municipio. Resultados: Se recolectaron 2,430 peces, correspondientes a 38 especies, agrupadas en 31 géneros, 19 familias y 12 órdenes. Las familias con la mayor riqueza específica fueron Cichlidae y Poeciliidae con nueve y seis especies. Priapella intermedia fue la especie más abundante (30.1% del total), seguida por Astyanax finitimus (13.3%) y Pseudoxiphophorus bimaculatus (10.3%). Con respecto a los aspectos biogeográficos del conjunto íctico, se observó un predominio de especies neotropicales (91.9%), dos especies de origen neártico (Ictalurus meridionalis e Ictiobus meridionalis) y cuatro vicarias (Atherinella sallei, Cathorops cf. kailolae, Eugerres mexicanus y Strongylura hubbsi), 31 especies se encuentran evaluadas en alguna categoría de riesgo y dos son exóticas. Conclusiones: La ictiofauna de Santa María Chimalapa es similar al de los cuerpos acuáticos presentes en selvas del sur de México. Son necesarios estudios ecológicos, de conservación e impacto antropogénico para establecer estrategias sustentables de conservación.

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Section: Discussionmentioning

confidence: 99%

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2020

Hidrobiológica

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“…would cause damage to the seaweed as seen in the rotting disease of kelp (Gachon et al 2010) and in Laminaria japonica thalli (Wang et al 2008). According to Syafitri et al (2017), Alteromonas macleodii and Pseudoalteromonas issachenkonii are the causative agents for ice-ice disease symptoms in farmed K. alvarezii collected from Karimunjawa island, North Java Sea, Indonesia and A. macleodii showed the highest pathogenicity compared to other causative agents tested. Besides bacteria strains mentioned above, other seaweed-associated bacteria have been reported to cause ice-ice disease in K. alvarezii (Achmad et al 2016).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of disease resistance and tolerance to elevated temperature stress of the selected tissue-cultured Kappaphycus alvarezii Doty 1985 under optimized laboratory conditions

et al. 2018

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Information on the abiotic stress tolerance and ice-ice disease resistance properties of tissue-cultured is scarce and can pose a big hurdle to a wider use of tissue-cultured seaweed in the industry. Here, we reported on a study of seaweed-associated bacteria diversity in farmed and tissue-cultured, and ice-ice disease resistance and elevated growth temperature tolerance of tissue-cultured in laboratory conditions. A total of 40 endophytic seaweed-associated bacteria strains were isolated from 4 types of samples based on their colony morphologies, Gram staining properties and 16S rRNA gene sequences. Bacteria strains isolated were found to belong to sp., sp., sp., sp., sp., sp., sp., sp., sp., sp. and sp. strain ABI-TU15 isolated in this study showed agar-degrading property when analyzed using agar depression assay. Disease resistance assay was performed by infecting healthy with 10 cells/mL sp. ABI-TU15. Severe ice-ice disease symptoms were detected in farmed seaweeds compared to the tissue-cultured. Besides disease resistance, tissue-cultured showed better tolerance to the elevated growth temperatures of 30 and 35 °C. In conclusion, our overall data suggests that tissue-cultured exhibited better growth performance than farmed seaweeds when exposed to elevated growth temperature and ice-ice disease-causing agent.

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“…Despite the government drive to support and regulate the seaweed industry, growth in production remains limited. One of the major limiting factors is the increase in outbreaks of 'ice-ice' disease and epiphytic pests, which cause a decline in crop quality and lead to total crop loss (Largo et al 2017;Loureiro et al 2017;Reddy et al 2017;Syafitri et al 2017). In 2000-2001, the region of Kepulauan Seribu reported crop losses by diseases of up to 80%, with Lombok, South Sulawesi and Central Sulawesi reporting a 50% loss, and Kalimantan and Moluccas a 30% loss (Ministry of Marine Affair and Fisheries (MMAF-KKP) 2002; Yulianto 2004).…”

Section: And New Regulationsmentioning

confidence: 99%

“…Cultivation of Kappaphycus and Eucheuma is also characterized by a short, single crop cycle of 35-45 days (Standar Nasional Indonesia 2010; Neish 2013), compared to many fish species which may take months to years (Hutapea et al 2017;Suwirya and Giri 2018). Disease and pest outbreaks can, therefore, develop far more rapidly (Largo et al 1995(Largo et al , 2017Syafitri et al 2017) compared with fish and aquatic animals (Flegel 2012;Brazenor and Hutson 2015). This example should be taken into account in quarantine measures where a 14-day quarantine period has been suggested as appropriate for seaweeds (Zemke-White and Smith 2006; Food Agriculture Organization 2007; Malaysian Standard 2012) compared with a recommended isolation period of 21 days or longer for fish (Whittington and Chong 2007;Hadfield and Clayton 2011;Becker et al 2014).…”

Section: Unspecific Allocation Of Seaweed Aquaculture In Biosecurity mentioning

confidence: 99%

“…Adopting evidence-based policies is viewed as necessary for developing the most up-to-date approaches to biosecurity (Scarfe 2003;Dahlstrom et al 2011;Loureiro et al 2015;Rodgers et al 2015). Despite numerous studies on seaweed pests and diseases in Indonesia (Yulianto 2004;Fitrian 2015;Syafitri et al 2017), most of the information used to inform biosecurity in national policy and legislation is from anecdotal reports. Only five of the 11 Indonesian frameworks assessed mentioned the use of scientific literature, experiential evidence and expert or stakeholder opinions, which are a critical requirement for building robust national regulations.…”

Section: Limited Scientific Information In Seaweed Frameworkmentioning

confidence: 99%

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An analysis of the current status and future of biosecurity frameworks for the Indonesian seaweed industry

et al. 2020

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Indonesia is the world largest producer of the red seaweeds Kappaphycus and Eucheuma; however, this country is facing significant challenges such as disease outbreaks, epiphyte infestations and a loss in seedling quality. Biosecurity practices have been widely adopted in other aquaculture sectors and when enforced can help to limit the introduction and spread of diseases and pests. To assess current capacity for biosecurity in seaweed aquaculture in Indonesia, a systematic analysis of policy frameworks including legislation, regulatory tools, and national standards was conducted. Biosecurity themes and risks were used to evaluate current national biosecurity content. The results identified major challenges faced by the industry in order to implement biosecurity policies in practice. Barriers to implementation included unspecific reference to the seaweed aquaculture sector, limited variety of approaches to biosecurity, limited use of up-to-date scientific evidence, insufficient guidance for the use of precaution and insufficient inclusion of specific biosecurity hazards. In general, although national regulations are currently under revision, current policies indicate a lack of clarity where biosecurity is included. Six recommendations are suggested to incorporate proactive biosecurity actions into current frameworks, with the aim of improving the health and sustainability of the seaweed aquaculture sector in Indonesia.

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Genetic diversity of the causative agent of ice-ice disease of the seaweedKappaphycus alvareziifrom Karimunjawa island, Indonesia

Cited by 17 publications

References 17 publications

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Evaluation of disease resistance and tolerance to elevated temperature stress of the selected tissue-cultured Kappaphycus alvarezii Doty 1985 under optimized laboratory conditions

An analysis of the current status and future of biosecurity frameworks for the Indonesian seaweed industry

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