Abundance, biomass and seasonal dynamics of Cyclopoida (Crustacea, Copepoda) in Vaya Lake (Burgas Lake), Bulgaria
| dc.contributor.author | Nenova, Elena | |
| dc.date.accessioned | 2026-06-05T19:35:05Z | |
| dc.date.available | 2026-06-05T19:35:05Z | |
| dc.date.issued | 2026-06-03 | |
| dc.description.abstract | A quantitative analysis of Copepoda abundance and biomass in Vaya Lake (Burgas Lake, Bulgaria) was conducted at 11 sampling stations during 2003–2007, with samples collected seasonally (autumn, winter, spring and summer). The cumulative abundance recorded during the study period was 26.48 × 106 ind./m3, corresponding to a mean abundance of 6.62 × 106 ind./m3. Copepodites dominated the community (14.89 × 106 ind./m3), followed by Nauplii (9.96 × 106 ind./m3). Among adult copepods, Cyclops vicinus Uljanin, 1875 ranked third in abundance (1.36 × 106 ind./m3), whereas Thermocyclops oithonoides (G.O. Sars, 1863) showed the lowest abundance (271,500 ind./m3). The cumulative biomass recorded during the study period was 258.97 g/m3, with the highest seasonal value observed in spring 2006. Biomass was dominated by Cyclops vicinus (175.05 g/m3), followed by Copepodites (74.32 g/m3), Nauplii (4.98 g/m3) and Thermocyclops oithonoides (4.62 g/m3). Cluster analysis based on the Bray–Curtis similarity index revealed more than 85% similarity among most sampling stations with respect to abundance. Station 12 was clearly separated from all other stations because of its exceptionally high biomass, dominated by C. vicinus and Copepodites, whereas stations 3, 4, 8, 1, 11, 2 and 6 showed approximately 87% similarity. Seasonal dynamics were characterized by contrasting patterns in juvenile and adult development: Nauplii and Copepodites reached maximum abundance during winter, whereas biomass peaked in spring due to the development of the dominant species C. vicinus. | |
| dc.identifier.issn | 1313-9916 | |
| dc.identifier.uri | https://doi.uni-plovdiv.bg/handle/store/1029 | |
| dc.language.iso | en | |
| dc.publisher | Plovdiv University "Paisii Hilendarski" | |
| dc.subject | Copepoda | |
| dc.subject | hypertrophic lake | |
| dc.subject | Black Sea coastal lakes | |
| dc.title | Abundance, biomass and seasonal dynamics of Cyclopoida (Crustacea, Copepoda) in Vaya Lake (Burgas Lake), Bulgaria | |
| dc.type | Article |