Morphology of the nauplii and duration of naupliar development of the Black Sea alien species Oithona davisae Ferrari and Orsi, 1984 (Copepoda: Cyclopoida) in laboratory culture.
The paper presents descriptions, original drawings and digital photos, and also the key for identifying naupliar stages of recent invader species in the Black Sea Oithona davisae (Copepoda: Cyclopoida). Nauplii were taken from a laboratory culture originating from the offspring of O. davisae females selected from living zooplankton sampled in Sevastopol Bay. Copepods were reared under natural illumination, temperature of 21±2°C, and feeding with cryptophyte culture IBSS-CrPr54 (ESD=10.9±1.4 µm) (mean concentration constituted 6×103 cells mL-1; 0.7 µg C mL-1). The duration of the development from the first naupliar stage (N1) to the first copepodite (C1) stage was 5.3±0.7 days (1 day for N1-N3, 1 day for N3-N4, and 3.3 days for N4-C1).