Naslov
Age, growth and mortality of scaldfish (Arnoglossus laterna Walbaum, 1792) from the Adriatic Sea

Autori
Tičina, Vjekoslav ; Matić-Skoko, Sanja

Izvornik
Journal of applied ichthyology (0175-8659) 28 (2012), 5; 836-841

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
age; growth mortality; Arnoglossus laterna; Adriatic Sea

Sažetak
The population dynamics parameters of scaldfish, Arnoglossus laterna, from the Adriatic Sea were studied. Specimens ranging from 4.5 to 17.1 cm in total length were collected from commercial bottom-trawl catches (2000-2006). The species spawns from April through the end of August, with a peak in May, and is one of usually present non-target species in mixed bottom trawl catches. The overall male to female ratio was 1.00:0.61. The oldest individual was 6 year old. The length-weight relationship showed positive alometric growth (b = 3.36 for males and b = 3.39 for females). The parameters of the von Bertalanffy growth equation were: L∞ = 17.3 cm ; K = 0.258 per year ; t0 = -1.0026 year ; R2 = 0.925. The relatively low value of total mortality (Z = 0.90) and relatively high value of constant rate of natural mortality (M = 0.64) was estimated. Eventually calculated fishing mortality (F = 0.26) and consequently estimated exploitation ratio (E = 0.29) indicated no danger of over exploitation of this species in the study area at current level of fishing pressure. The low T max and correspondingly high M suggest that this small benthic predator plays an important role in the Adriatic ecosystem as a prey species for large benthic predators. However, the estimates include uncertainties and require further confirmation, especially of the natural mortality.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Biotehnologija

POVEZANOST RADA