Lipids of Neocalanus cristatus and Eucalanus bungii (C3 to adults), collected in March, May, and December from various depths (0-2000m) were studied in the Oyashio region, western North Pacific. Total lipid and wax ester contents of younger N. cristatus stages increased during the development, being higher in May than in March and December. Major fatty acids of younger N. cristatus were 16:0, 2...

ABSTRACT Fish are considered one of the important sources protein which invaded by different parasites. This study aimed to shed light on monogenean parasites that infect fish within family Sparidae in Saudi Arabia. A total 30 Argyrops filamentosus specimens were collected from Red Sea, city Jeddah (Saudi Arabia), and then examined for presence Parasitic species isolated studied morphologically...

Populations of the macaroni penguin Eudyptes chrysolophus and eastern rockhopper E. filholi breeding at Marion Island (Prince Edward Islands) in sub-Antarctic Indian Ocean decreased from 1994 to 2018. We examined their diets when rearing chicks during this period. There was substantial overlap two species, with crustaceans, dominated by euphausiids Thysanoessa vicina Euphausia vallentini, makin...

Crustaceans are sensitive to hypoxia and are therefore useful indicator organisms for oxygen depletions. We used the experimental anoxia generating unit in the northern Adriatic Sea to artificially induce and document hypoxia and anoxia on a small scale (0.25 m2 per deployment). Behavioural responses and mortalities were documented for 9 crustacean species typical for the sublittoral soft botto...

Using new collecting techniques with the Johnson-Sea-Link submersible, eight species of deep-sea benthic crustaceans were collected with intact visual systems. Their spectral sensitivities and temporal resolutions were determined shipboard using electroretinography. Useable spectral sensitivity data were obtained from seven species, and in the dark-adapted eyes, the spectral sensitivity peaks w...

The suprabenthos comprises all bottom-dependent animals, mainly crustaceans (including decapods and peracarids), which perform--with varying amplitude, intensity and regularity--seasonal or daily vertical migrations above the sea floor. The presence of organisms in the Benthic Boundary Layer is determined by two general factors: (1) organism behaviour, which depends on the light penetration in ...