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  1. No Access

    Article

    Feeding patterns of dominating small pelagic fish in the Gulf of Riga, Baltic Sea

    We investigated the feeding of the dominant small pelagic fish—herring Clupea harengus membras and three-spined stickleback Gasterosteus aculeatus—in the Gulf of Riga (Baltic Sea) in the summers of 1999–2014. The...

    Henn Ojaveer, Ain Lankov, Marilyn Teder, Mart Simm, Riina Klais in Hydrobiologia (2017)

  2. No Access

    Chapter and Conference Paper

    Persistent Organic Pollutants (POPs): Food Safety Control in Estonia

    The objective of article is to harmonize and integrate the activities of the New European Union (EU) Member State — Estonia in the field of chemical food safety with those of Old Member States. This will be ac...

    Ott Roots, Mart Simm, Hannu Kiviranta… in The Fate of Persistent Organic Pollutants … (2008)

  3. Article

    Ecological consequences of biological invasions: three invertebrate case studies in the north-eastern Baltic Sea

    Population dynamics and ecological impacts of the cirriped Balanus improvisus, the polychaete Marenzelleria neglecta and the cladoceran Cercopagis pengoi were investigated in the north-eastern Baltic Sea. After a...

    Jonne Kotta, Ilmar Kotta, Mart Simm, Ain Lankov… in Helgoland Marine Research (2006)

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  4. No Access

    Article

    Taxonomic Status and Reproduction Dynamics of the Non-Indigenous Cercopagis in the Gulf of Riga (Baltic Sea)

    Overwintering population of Cercopagis is represented by resting eggs which hatch generally in May. Although representatives of the first parthenogenetic generation (the spring form individuals) differ morphologi...

    Mart Simm, Henn Ojaveer in Hydrobiologia (2006)

  5. No Access

    Article

    Population dynamics and ecological impact of the non-indigenous Cercopagis pengoi in the Gulf of Riga (Baltic Sea)

    Abundance of the exotic predatory cladoceran Cercopagis pengoi (Ostroumov, 1891) in the Gulf of Riga has increased during the first ten years of invasion (1992–2001) and peaked with an annual mean of 420 ± 109 (s...

    Henn Ojaveer, Mart Simm, Ain Lankov in Hydrobiologia (2004)

  6. No Access

    Article

    Factors controlling long-term changes of the eutrophicated ecosystem of Pärnu Bay, Gulf of Riga

    Phytoplankton, mesozooplankton, mysids and fish larvae were studied during 15–29 annual cycles measured weekly to monthly in Pärnu Bay, the Gulf of Riga. The monthly variability of the biological data was rela...

    Jonne Kotta, Mart Simm, Ilmar Kotta, Inga Kanošina, Kalle Kallaste… in Hydrobiologia (2004)

  7. No Access

    Chapter and Conference Paper

    Factors controlling long-term changes of the eutrophicated ecosystem of Pärnu Bay, Gulf of Riga

    Phytoplankton, mesozooplankton, mysids and fish larvae were studied during 15–29 annual cycles measured weekly to monthly in Pärnu Bay, the Gulf of Riga. The monthly variability of the biological data was rela...

    Jonne Kotta, Mart Simm, Ilmar Kotta, Inga Kanošina… in Biology of the Baltic Sea (2004)