Helen Orav-Kotta
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Helen Orav-Kotta has a total of 9 co-authors. Here are the top co-authors by number of shared publications:
- Jonne Kotta
Estonian Marine Institute, University of Tartu, Tallinn, Estonia
2 shared publications - Georg Martin
Estonian Marine Institute, Faculty of Science and Technology, University of Tartu, Mäealuse 14, 12618 Tallinn, Estonia
1 shared publication Ilmar Kotta
University of Tartu
1 shared publication- Indrek Adler
Estonian Maritime Academy, Tallinn University of Technology, Kopli 101, 11712 Tallinn, Estonia
1 shared publication - Kristel Vene
Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
1 shared publication - Kristjan Herkül
University of Tartu
1 shared publication
Latest Publications
- Open Access
Exploring the Cultivation of Ulva intestinalis in Low-Salinity Environments of the Baltic Sea
Ulva intestinalis holds promise for sustainable aquaculture in the Baltic Sea, but success has so far been limited by high environmental variability. This study examines how environmental factors influence sporogenesis, attachment, and growth of U. intestinalis in the low-salinity Baltic Sea. Optimal sporogenesis was observed at nutrient levels of 4–7 g/L, with peak zoospore release at 22–24 °C. Artificial substrates showed limited attachment success, as competing algae like Pylaiella littoralis and Cladophora glomerata often outperformed Ulva. Mesh cage cultivation demonstrated potential, achieving growth rates similar to controlled systems, though storm-induced turbidity lowered growth. These findings highlight the importance of tailored Baltic Sea cultivation strategies, focusing on nutrient, temperature, water stability, and competition management to enhance Ulva production. As the first pilot experiments in the region, they provide essential input for developing informed strategies that support more detailed trials and future scaled-up production.
Open AccessExploring the Cultivation of Ulva intestinalis in Low-Salinity Environments of the Baltic Sea
Ulva intestinalis holds promise for sustainable aquaculture in the Baltic Sea, but success has so far been limited by high environmental variability. This study examines how environmental factors influence sporogenesis, attachment, and growth of U. intestinalis in the low-salinity Baltic Sea. Optimal sporogenesis was observed at nutrient levels of 4–7 g/L, with peak zoospore release at 22–24 °C. Artificial substrates showed limited attachment success, as competing algae like Pylaiella littoralis and Cladophora glomerata often outperformed Ulva. Mesh cage cultivation demonstrated potential, achieving growth rates similar to controlled systems, though storm-induced turbidity lowered growth. These findings highlight the importance of tailored Baltic Sea cultivation strategies, focusing on nutrient, temperature, water stability, and competition management to enhance Ulva production. As the first pilot experiments in the region, they provide essential input for developing informed strategies that support more detailed trials and future scaled-up production.
- Open Access
- 23 April 2008
- Published by Springer Nature in Biological Invasions
- Vol. 11 (3) , 597-608
Seasonal variability in the grazing potential of the invasive amphipod Gammarus tigrinus and the native amphipod Gammarus salinus (Amphipoda: Crustacea) in the northern Baltic Sea
- 23 April 2008
- Published by Springer Nature in Biological Invasions
- Vol. 11 (3) , 597-608
Open AccessSeasonal variability in the grazing potential of the invasive amphipod Gammarus tigrinus and the native amphipod Gammarus salinus (Amphipoda: Crustacea) in the northern Baltic Sea