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Swordfish feed daily, most often at night, when they rise to surface and near-surface waters in search of smaller fish. During the day, they commonly occur to depths of 550 m (1,800 ft; 300 fathoms) and have exceptionally been recorded as deep as 2,878 m (9,442 ft; 1,574 fathoms). [ 3 ]
Many organisms in the mesopelagic zone move up into the epipelagic zone at night, and retreat to the mesopelagic zone during the day, which is known as diel vertical migration. [8] These migrators can therefore avoid visual predators during the day and feed at night, while some of their predators also migrate up at night to follow the prey.
Some particular types of migration are anadromous, in which adult fish live in the sea and migrate into fresh water to spawn; and catadromous, in which adult fish live in fresh water and migrate into salt water to spawn. [2] Marine forage fish often make large migrations between their spawning, feeding and nursery grounds. Their movements are ...
Diel vertical migration (DVM), also known as diurnal vertical migration, is a pattern of movement used by some organisms, such as copepods, living in the ocean and in lakes. The adjective "diel" ( IPA : / ˈ d aɪ . ə l / , / ˈ d iː . əl / ) comes from Latin : diēs , lit.
Freezing rain occurs when the wedge of warm air aloft is much thicker, allowing the raindrop to survive until it comes in contact with the cold ground. A coating of ice forms on whatever the ...
Freezing rain could lead to treacherous conditions across the UK over the weekend, the Met Office warned
The species of benthic invertebrates are those which arise greater interest since they are enriched by a great variety of forms and colours due to the abundance of Cnidaria (sea anemones, madrepore and corals). A clear example is the "forest" of yellow and red Paramuricea clavata. These, adding to the substrate, create an ideal benthic ...
Circadian migration is where birds utilise circadian rhythm (CR) to regulate migration in both fall and spring. In circadian migration, clocks of both circadian (daily) and circannual (annual) patterns are used to determine the birds' orientation in both time and space as they migrate from one destination to the next.