Diet composition of the five deep sea fish from the Aegean Sea.

Abstract

Ege Denizi'nde bulunan beş derin deniz balığı: Argentina sphyraena, Glossanodon leioglossus, Chlorophthalmus agassizi, Hoplostethus mediterraneus ve Capros aper 2003 bahar mevsimi süresince ticari trol balıkçıları tarafından hedef dışı av olarak elde edilen örnekler olarak çalışılmıştır. Türlerin besin kompozisyonlarını belirlemek için mide içerikleri incelenmiştir ve türlerin trofik durumlarının özellikle karnivor seviyede yer aldığı görülmüştür. Beş predator türün besin kompozisyonunda iki esas av grubu bulunmuştur: Crustacea (copepodlar ve isopodlar gibi) ve Chaetognatha (Sagitta spp.).

First observations on diet and feeding strategy of boarfish, Capros aper (Actinopterygii: Perciformes: Caproidae), in the eastern Ionian Sea (central Mediterranean)

“…This result is generally consistent with the findings of other authors focusing on the Atlantic (Fock et al 2002, Lopes et al 2006, in the central Tyrrhenian Sea (Carpentieri et al 2016), in the western Mediterranean (MacPherson 1979) and in the eastern Mediterranean (Sever et al 2013). Santos and Borges (2001) found that Euphausiacea and Amphipoda were the main prey of C. aper in the southern coast of Portugal.…”

“…Similar results, with the vacuity index near to zero, have been reported by Fock et al (2002). As opposed, Sever et al (2013) found a high degree of empty guts. Carpentieri et al (2016) indicated that the species shows a marked daily temporal pattern, with feeding peak during daylight hours.…”

“…Carpentieri et al (2016) noticed that copepods and amphipods showed only slight seasonal differences in comparison to the gastropods. Works conducted in different seasons (Fock et al 2002, Lopes et al 2006, Sever et al 2013, Carpentieri et al 2016 showed that copepods were the most important prey of the species in all cases. The high copepods abundance in the C. aper diet could also be related to the diurnal variability in feeding habits.…”

“…The diet of C. aper has been studied in different areas of the Mediterranean: the western part (MacPherson 1979), Aegean Sea (Sever et al 2013), central Tyrrhenian Sea (Carpentieri et al 2016), and the Atlantic Ocean, including Portuguese waters (Santos andBorges 2001, Fock et al 2002), south-eastern North Atlantic (Lopes et al 2006). The diet of boarfish reported by the abovementioned authors consisted primarily of copepods, specifically Calanus helgolandicus, some mysid shrimps, and euphausiids (MacPherson 1979, Fock et al 2002, Lopes et al 2006.…”

“…1) in October 2014 within the framework of the DeFishGear project (str/00010, IPA-Adriatic, Cross-Border Cooperation 2007-2013. Sampling was carried out with the oceanographic RV PHILIA.…”