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The Sentinel-class cutter, also known as the Fast Response Cutter or FRC due to its program name, is part of the United States Coast Guard's Deepwater program. [2] [3] [4] At 154 feet (46.8 m), it is similar to, but larger than, the 123-foot (37 m) lengthened 1980s-era Island-class patrol boats that it replaces.
The behavior of an amphibian hatchling, commonly referred to as a tadpole, is controlled by a few thousand neurons. [4] 99% of a Xenopus hatchling's first day after hatching is spent hanging from a thread of mucus secreted from near its mouth will eventually form; if it becomes detached from this thread, it will swim back and become reattached, usually within ten seconds. [4]
This is known as cyclical parthenogenesis and, in temperate regions, sexual reproduction occurs in autumn and results in the production of overwintering eggs, which hatch the following spring and initiate another cycle.
Phytoplankton concentrations are maintained, and enriched Artemia nauplii and rotifers are fed to the cobia larvae for 3–7 days after they hatch. The larvae require rotifers for at least four days after hatching. [ 8 ]
The male guards the nest for the two to seven days needed for the eggs to hatch. The transparent larvae are 2 to 4 mm (0.079 to 0.157 in) long. They go through a pelagic stage, which depending on the species, can last as little as a week or more than a month. [ 12 ]
Within a day, larvae hatch from the eggs; they live and feed where they were laid. They are pale-whitish, 3 to 9 mm ( 1 ⁄ 8 to 11 ⁄ 32 in) long, thinner at the mouth end, and legless. [ 14 ] Larval development takes from two weeks, under optimal conditions, to 30 days or more in cooler conditions.
Cusk-eels are generally very solitary in nature, but some species have been seen to associate themselves with tube worm communities. [5] Liking to be hidden when they are not foraging, they generally associate themselves within muddy bottoms, sinkholes, or larger structures that they can hide in or around, such as caves, coral crevices, or communities of bottom-dwelling invertebrates, with ...
Springtails (class Collembola) form the largest of the three lineages of modern hexapods that are no longer considered insects.Although the three orders are sometimes grouped together in a class called Entognatha because they have internal mouthparts, they do not appear to be any more closely related to one another than they are to all insects, which have external mouthparts.