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Some biological characteristics of the Atlantic lizardfish Synodus saurus (Actinopterygii: Synodontidae) in the Adriatic Sea

The Atlantic lizardfish, Synodus saurus (Linnaeus, 1758) is relatively rare species in the Adriatic Sea and very little is known about its biological characteristics. Therefore, the aim of this research was to determine the basic biological characteristics of this species in the Adriatic Sea. The study was conducted on 119 individuals collected mostly in the colder period of the year and total body lengths of caught individuals raged from 19, 3 to 39, 5 cm and weighted from 49, 96 to 460, 12 g. Male to female ratio was 1 ; 1, 33. Mean total lengths of females were significantly larger than those of males. Length-weight relationship was positively allometric (b = 3, 1314), and the estimated condition factor for total sample was 0, 79. The highest values of gonadosomatic index for both sexes were recorded in July, and data suggests that spawning period takes place in the summer months. The most common species found in the stomach contents of the Atlantic lizardfish were European pilchard Sardina pilchardus and picarel Spicara smaris. In the total sample, majority of individuals were 3 years old while the oldest age determined in a single individual was 7. Growth parameters determined using von Bertalanffy model were as follows: L∞ = 42, 28 ; K=0, 189 ; t0 = -1, 709 ; R2 = 0, 736.

Synodus saurus, age and growth, mediterranean sea, Atlantic lizardfish

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