Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2026
Forfattere
Alexander Jueterbock Anne Margrete Leiros Nilsen Niko Steiner Clément Gauci Leo Minini Ralf Rautenberger Christian Guido Bruckner Nikolai Buer Inka BartschSammendrag
Mariculture has emerged as a sustainable solution to address growing global demands for food and high-value products, with kelp cultivation playing a central role due to its diverse applications and ecological benefits. While advances in kelp farming have focused on optimizing either hatchery or grow-out phases, the long-term effects of early gametophyte treatments on sporophyte performance remain underexplored. Although the transition from gametophyte culture to harvestable sporophytes is routine in commercial kelp farming, no published, integrated framework exists that is purpose-built for researchers and R&D practitioners who need to document the effect of specific early-stage treatments applied under replicated, controlled conditions on measurable differences in sporophyte performance. Here, we present a detailed methodology for conducting experimental mariculture trials that bridge controlled laboratory experiments and field-scale applications. Our approach integrates controlled gametophyte treatments, seeding, hatchery cultivation, and field deployment, providing a replicable experimental framework for studying the influence of early-stage conditions on the growth, resilience, and productivity of mature sporophytes. This adaptable methodology enables researchers to address, in collaboration with kelp farmers, the impact of experimental conditions during gametophyte cultivation on the growth and performance of the kelp sporophytes in a factorial replicated design.
Forfattere
Bienson Ceasar V. Narvarte Shienna Mae C. Gonzaga Lourie Ann R. Hinaloc Jonh Rey L. Gacura Emmanuel M. Mendoza Ronel T. Aguilar Bea A. Crisostomo Michael RoledaSammendrag
Betaphycus gelatinus is a red seaweed with emerging commercial interest due to its potential as a source of high-quality carrageenan and bioactive compounds. Despite its promise, there remains a lack of established cultivation techniques for this species. Here, we provided a comprehensive assessment of the strain-specific performance of B. gelatinus grown in land-based cultivation systems, focusing on growth and its seasonality, morphological transformation, and a snapshot biochemical analysis at the end of a one-year cultivation period. Three B. gelatinus strains, namely KU9-PGD, KG1-PGD, and K-PGD, were collected from field and maintained in a land-based culture system. Significant differences in growth rates were observed among strains, with generally higher values recorded during the inter- and southwest monsoon (0.78 – 3.09, 1.74 – 4.41, and 1.79 – 5.45% d−1, respectively) compared to northeast monsoon (0.49 – 1.44, 1.25 – 2.12, and 1.20 – 3.97% d−1, respectively). Among the three strains, K-PGD exhibited the most robust growth, underscoring the importance of strain selection in optimizing biomass yield. Growth rates also varied between cultivation systems, with glass aquaria (1.30 – 2.87% d−1) promoting higher growth rates than concrete tanks (1.15 – 1.75% d−1). The domestication of B. gelatinus resulted in morphological transformation where changes in branching, pigmentation, and thallus surface features emerged compared to their respective original wild forms. During the southwest monsoon sampling, biochemical profiles (pigments, carbohydrates, proteins) of the three strains remained relatively uniform under controlled conditions. These results affirm the potential of B. gelatinus as a viable crop for future commercial mariculture and provide valuable baseline information for developing cultivation protocols and selecting high-performing strains for large-scale production.
Sammendrag
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Forfattere
Ralf Rautenberger Michael Streicher Minini Léo Roosvall Sara Sdena Nunes Oddvar Harald OttesenSammendrag
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Sammendrag
The continued use of the red seaweed name Eucheuma cottonii in applied research reflects a persistent gap between taxonomic revisions and their adoption in the scientific literature. Although widely reported in food and industrial studies, E. cottonii is an obsolete name now reclassified as Kappaphycopsis cottonii, a species not currently known to be cultivated commercially. Most studies are therefore referring to commonly cultivated carrageenophytes Kappaphycus alvarezii or K. striatus, which may result in misidentification of the biological material. This issue is evident across diverse applications, including food fermentation, bioethanol production, animal nutrition, and biomaterials development, and is particularly apparent in publications originating from Southeast Asia, particularly Indonesia. This suggests that taxonomic inaccuracies may not be consistently recognized during peer review and editorial processes. Given that carrageenan composition and biochemical properties are species-specific, incorrect naming can affect reproducibility, product performance, and process optimization, and may also have implications for regulatory compliance, including food labeling and clean-label claims. This letter outlines the implications of taxonomic inaccuracies and draws attention to the importance of accurate species identification, and the use of taxonomic verification in applied research.
Forfattere
Hasriani Ayu Lestari Fahrurrozi Izzuddin Wahyu Purbiantoro Yanti Inneke Nababan Zaenal Arifin Siregar Hikmaturrohmi Hikmaturrohmi Eka Sunarwidhi Prasedya Michael RoledaSammendrag
The ice-ice disease (IID) impacting the commercially important eucheumatoid seaweed Kappaphycus striatus is characterized by thallus bleaching (whitening), softening, and subsequent disintegration of the affected tissue. The occurrence of IID is thought to be stress-related release of dissolve organic carbon exudates that are utilized as substrate for microbial growth. The presence of pathogenic bacteria can subsequently induce IID manifestations that can jeopardize crop health. In this study, we investigated the role of pathogenic bacteria isolated from diseased green cultivar of K. striatus in inducing IID symptoms in healthy non-axenic brown cultivar of the same species under controlled laboratory conditions. Healthy branches of K. striatus were exposed to four distinct bacterial strains: three isolated from the diseased K . striatus ( Vibrio brasiliensis strain A8, V . brasiliensis strain B2 and V . chemaguriensis strain V1) and a positive control Cytobacillus solani strain-V2. Over a period of ten days, routine administration of each bacterium was conducted during the daily renewal of the filtered seawater medium. The occurrence of symptoms, i.e., typical of IID infection, was observed in samples subjected to additional bacterium but not under the control condition with natural microbiome. Our findings suggest that the presence of pathogenic bacteria, even under non-stressful laboratory conditions, can induce IID disease syndrome with various manifestations, including the development of wounds, abrasions, thallus bleaching, and fragmentation. The samples infected with the positive control C. solani strain-V2 exhibited the most severe bleaching at 80%, followed by V. brasiliensis strain-A8 at 60%, while V. brasiliensis strain-B2 and V, chemaguriensis strain-V1 both induced 50% thallus bleaching.
Forfattere
Divya Karthick Rajan Durairaj Karthick Rajan Jayakumar Rajarajeswaran Nagarajan Revathi Shubing Zhang Kannan Mohan Abirami Ramu GanesanSammendrag
Edible coleopteran insects are an important source for sustainable protein and generating chitin as a significant waste (exuviae, cuticle residues, and frass), which can be valorized into value-added biopolymers. These side-streams can be diverted for chitin and chitosan production due to their biocompatibility and biodegradability in biomaterial applications which gained attention in recent times. Therefore, this review evaluates various types of chitin and chitosan extractions and their structural characterization suitable for industrial applications. The nutritional and bioactive functionalities of chitin as derived from coleoptera insect side-streams were critically discussed. Furthermore, it also distinguishes the presence of α-, β-, and γ-chitin polymorphic forms exhibited in the coleopterans order with recent research gaps was also discussed herein. Currently, there is no literature review that describes the roles of coleopteran side-streams derived chitin and chitosan. Hence, this review not only underscores the potential for chitin production from coleopteran side-streams but also outlines critical bottlenecks that warrant further investigation in biopolymer chemistry. Moreover, it provides comprehensive recommendations to facilitate the scale-up of chitin and chitosan derived from coleopteran side-streams as an added advantage for new business models.
2025
Forfattere
Ralf RautenbergerSammendrag
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Sammendrag
Carrageenophytes such as Eucheuma and Kappaphycus play a vital role in supporting coastal economies and supplying the global hydrocolloid industry, with Indonesia producing over 75% of the world’s supply. However, the unregulated use of chemical liquid fertilisers (CLF) in seaweed farming poses serious ecological and socio-economic threats. In Sikka Regency, Indonesia, CLF use contributed to a decade-long collapse in cultivation, worsened by destructive fishing practices. Although efforts to revive farming began in 2018, current monitoring data are limited and fragmented. Nutrient over-enrichment from fertilisers has been linked to harmful algal blooms, epiphyte overgrowth, and diseases like ice-ice. While countries like the Philippines have introduced standards such as the GAqP for seaweeds, Indonesia still lacks formal regulation on fertiliser use. Misleading scientific claims and social media endorsements further promote detrimental practices. This article highlights the urgent need for public awareness, science-based guidelines, and coordinated policy to safeguard sustainable seaweed aquaculture. Extension services, farmer cooperatives, and social media can raise awareness, but added resources are required for guidelines, stronger policies, and market incentives discouraging CLF use.
Sammendrag
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