Dr. Apostolos Siapatis has been working at the Institute of Marine Biological Resources and Inland Waters of the HCMR since 1994.The main fields of research in which he has worked all these years include:
- Classification and systematics of the early life history of marine fish (eggs, larvae and juveniles) in the Greek seas.
- Τhe spatial and temporal distribution and abundance of ichthyoplankton in relation to various biotic and abiotic factors in the Greek seas..
- Modeling of potential spawning fields of marine fish in the Greek seas.
- Estimation of stocks of small pelagic fish (e.g. anchovy) by the DEPM method (Daily Egg Production Method),
- Distribution and abundance of jellyfish and ctenophores in the Greek seas.