Assessment of the effect of the climate variations of coastal surface water and study of Sepia officinalis spawing.

摘要: The aim of this study was to establish whether climate change affected migratory behaviour Sepia officinalis (Linnaeus, 1758), which is an important resource for small-scale fishermen Abruzzo region (Italy). Starting at the beginning March until end April, cuttlefish in area migrates from deep cold water towards warmer coastal waters, where they spawn. Small-scale fishing permitted costal waters September. During period, between and September 2008, both traps trammel nets were used 5 sampling areas along coast test their relative efficiency catching cuttlefish. Trapped specimens counted, weighed measured, gender sexual maturity also determined. data obtained correlated surface temperature assess possible changes migration behaviours. show that during first months (March April), a greater percentage large males caught, while females smaller predominated later year. showed did not reveal any significant shifts trend over last 10 years. As methods, found be more effective than nets.