Naslov
Conservation status of the red gorgonian Paramuricea clavata (Risso, 1826) populations from the Eastern Adriatic Sea

Autori
Kipson, Silvija ; Garrabou, Joaquim ; Linares, Cristina ; Cebrián, Emma ; Ballesteros, Enric ; Čižmek, Hrvoje ; Bakran-Petricioli, Tatjana ; Kružić, Petar

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts of the 46th European Marine Biology Symposium (46th EMBS, Rovinj) / Travizi, Ana ; Iveša, Ljiljana ; Fafanđel, Maja - Rovinj : Institut Ruđer Bošković, Centar za istraživanje mora Rovinj, 2011, 84-84

Skup
46th European Marine Biology Symposium (46th EMBS)

Mjesto i datum
Rovinj, Hrvatska, 12.09.2011. - 16.09.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Adriatic Sea; Paramuricea clavata monitoring baseline

Sažetak
The red gorgonian Paramuricea clavata (Octocorallia, Cnidaria) is a long-lived, structurally important species in the Mediterranean benthic communities affected by several disturbances such as destructive fishing activities, mucilage events and mass mortality outbreaks caused by elevated seawater temperature. Given that almost all of the data currently available for this species were gathered in the NW Mediterranean Sea, we aimed to assess P. clavata conservation status in the Eastern Adriatic Sea. The density, size, biomass and necrosis rates were examined in 9 populations distributed along 200 km of the coastline, in the depth range from 30 to 50 m. The density ranged between 7 and 20 colonies per m2 whereas biomass ranged from 156 to 714 g per m2. The mean colony height was 31.2 cm and the maximum was 138 cm. The populations displayed different size frequency distributions indicating contrasting population dynamics. The presence of large colonies (> 80 cm) in several populations is noteworthy. For all populations, the extent of injury (i.e. denuded axis or present epibiosis) of P.clavata colonies was on average 9.7 ± 4% (mean ± SD), ranging from 2 to 20%. In addition, the proportion of healthy colonies (with <10% of injured surface) was high (>70%) in almost all of studied populations. The observed impact levels and size structure suggest good conservation status of P. clavata populations in the Eastern Adriatic Sea and provide baseline for their monitoring in the future.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA