Knowledge on biodiversity patterns of demersal megafaunal species in the Mediterranean and particularly in its eastern basin is still very scarce. In the present study, fine-scale diversity patterns in relation to depth were analyzed for three major megafaunal groups (fish, cephalopods and crustaceans) in three subareas of the eastern Mediterranean (Crete, Cyclades and Dodecanese islands). The ...

EDITORIAL article Front. Physiol., 02 August 2021 | https://doi.org/10.3389/fphys.2021.731780

Abstract We quantified cephalopods consumed by longnose lancetfish ( Alepisaurus ferox , n = 1267 stomachs containing cephalopod remains) from 2009 to 2018 in the central North Pacific Ocean (between 0–35° N and 135–175° W). When identified beak remains stomach contents were included diet analyses, clear increases abundance of gelatinous taxa inferred foraging depths evident. Ontogeny consumpti...

*上 田泰司 ,中 原元和,石 井紀明,鈴 木 譲:放 射線医学総合研究所 海洋 放射生 態学研究部,那 珂湊 市 磯崎3609〒311-12 **鈴 木浜治:動 力炉核燃料開発事業団 安全管理部 茨城県那珂郡東海村村松3371 〒319-11 Trace element/Cephalopods/Concentration factor For the estimation of internal radiation to human beings, the amounts of Mn, Fe, Cu, Zn, Co and Cs in 5 species of marine cephalopods were determined by atomic absorption spectro photometry and neutron activation analysis, and ...

Individual cuttlefish, octopus and squid have the versatile capability to use body patterns for background matching and disruptive coloration. We define--qualitatively and quantitatively--the chief characteristics of the three major body pattern types used for camouflage by cephalopods: uniform and mottle patterns for background matching, and disruptive patterns that primarily enhance disruptiv...

Previous studies demonstrate that soft-bodied (coleoid) cephalopods are adept at learning and remembering features of their environment, but little is known about their primitive relative, nautilus. Nautilus makes nightly migrations from deep to shallow water along coral reef slopes, covering large areas of varied substrate. Memory of its surroundings may be advantageous, but the nautilus brain...

Toothed whales use intense ultrasonic clicks to echolocate prey and it has been hypothesized that they also acoustically debilitate their prey with these intense sound pulses to facilitate capture. Cephalopods are an important food source for toothed whales, and there has probably been an evolutionary selection pressure on cephalopods to develop a mechanism for detecting and evading sound-emitt...