Naslov
Age and growth of Callista chione in the eastern Adriatic Sea

Autori
Kuzmanić, Marina ; Ezgeta, Daria ; Peharda, Melita ; Matijaca, Ivica ; Isajlović, Igor

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

Izvornik
43 EMBS / Neto, Ana - Ponta Delgada : EMBS, 2008, 103-103

Skup
43 EMBS

Mjesto i datum
Ponta Delgada, Portugal, 08.09.2008. - 12.09.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
age; growth; clam; Adriatic; bivalve; ecology

Sažetak
Marine bivalves as filter - feeders play important role in function of marine ecosystems and have a great contribution in zoobenthic biomass in many ecosystems. Although Callista chione (Linnaeus, 1758) is one of the commercial important bivalve species no previous studies were conducted on this species in the eastern Adriatic. Specimens of Callista chione were collected from a commercial catch in middle Adriatic Sea during the summer 2007. Shells (N=106) were aged based on formation of growth rings on the external shell surface and on formation of internal growth bands, gathered data were fitted to the von Bertalanffy growth function for height. Growth parameters (H∞ and k) were also estimated using Gulland – Holt plot where growth rates were plotted against the mean height and relative growth function was constructed. Age and growth rate data showed that this is a long – living species with the most intensive growth in first year (12.7 mm in height). Growth rate decreased with age and after 8 years growth rate is reduced to about 1mm per year. Based on two methods applied, modified Von Bertalanffy equations for height were constructed: Ht = 55.64 (1 – e – 0.26 (t-to)) and Ht = 53.53 (1 – e – 0.22 (t-to)). The estimated asymptotic shell lengths were 74.70 and 70.81 mm, respectively.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Biotehnologija

POVEZANOST RADA