tablemount
314
T
tablemount (syn. guyot) a flat-topped seamount rising from the floor of the ocean
like a volcano but planed off on top and covered by 200 m or more of water.
~sea-f1oor topography and ~abyssal hill.
TAC ~total allowable catch.
tagging attaching labels (of which a variety of types are available) to live fish,
birds, marine mammals, etc., after which the tagged and individually recognizable animals are put back in their natural environment. Under the
assumption that tagged individuals and untagged behave alike, the recaptured tagged ones give information on migration, growth rates, maximum
age, etc., while the ratio of tagged/untagged individuals in a catch and the
known number of tagged individuals gives an indication of the population
size. For recovery of tagged fish, scientists have to rely on fishermen, who are
encouraged to deliver tagged fish for a financial reward. When the landings
of a fish are partly or wholly reduced to fish meal, use can be made of magnetic tags, which can be recovered by magnetic separators in fish meal plants.
In some cases acoustic tags (on fish) or radio-tags (on marine mammals, seaturtles) are applied in behavioral studies. In such studies the changing position of an individual in the water column in relation to the tides can be followed.
Tanaidacea order of the class Malacostraca, subphylum Crustacea (phylum Arthropoda).
Small marine crustaceans resembling Isopoda. The body is elongated and
dorsoventrally flattened, the head and first two thoracic segments are fused,
and covered by a relatively small carapace. Typically the second pair of thoracic appendages have nippers, that are often short and bulbous. They mostly live in tubes in soft sediments and are selective deposit feeders. The eggs are
brooded in a marsupium (~Peracarida). Distribution is worldwide, from shore
to abyssal depths.
Tardigrada (water bears) phylum of microscopical, slow moving animals. The
body is cylindrical to barrel-shaped and has eight stumpy legs which terminate in claws or adhesive disks. The cuticle is chitinous and for growth molting is necessary. With their mouth, which has two stylets, they can pierce
cells and than suck up the intracellular fluid. They are detritivorous, omnivorous or predatory. The gut is straight and complete. Sexes are separate. The
animals as well as the eggs can survive long periods of drought. Their
314
T
tablemount (syn. guyot) a flat-topped seamount rising from the floor of the ocean
like a volcano but planed off on top and covered by 200 m or more of water.
~sea-f1oor topography and ~abyssal hill.
TAC ~total allowable catch.
tagging attaching labels (of which a variety of types are available) to live fish,
birds, marine mammals, etc., after which the tagged and individually recognizable animals are put back in their natural environment. Under the
assumption that tagged individuals and untagged behave alike, the recaptured tagged ones give information on migration, growth rates, maximum
age, etc., while the ratio of tagged/untagged individuals in a catch and the
known number of tagged individuals gives an indication of the population
size. For recovery of tagged fish, scientists have to rely on fishermen, who are
encouraged to deliver tagged fish for a financial reward. When the landings
of a fish are partly or wholly reduced to fish meal, use can be made of magnetic tags, which can be recovered by magnetic separators in fish meal plants.
In some cases acoustic tags (on fish) or radio-tags (on marine mammals, seaturtles) are applied in behavioral studies. In such studies the changing position of an individual in the water column in relation to the tides can be followed.
Tanaidacea order of the class Malacostraca, subphylum Crustacea (phylum Arthropoda).
Small marine crustaceans resembling Isopoda. The body is elongated and
dorsoventrally flattened, the head and first two thoracic segments are fused,
and covered by a relatively small carapace. Typically the second pair of thoracic appendages have nippers, that are often short and bulbous. They mostly live in tubes in soft sediments and are selective deposit feeders. The eggs are
brooded in a marsupium (~Peracarida). Distribution is worldwide, from shore
to abyssal depths.
Tardigrada (water bears) phylum of microscopical, slow moving animals. The
body is cylindrical to barrel-shaped and has eight stumpy legs which terminate in claws or adhesive disks. The cuticle is chitinous and for growth molting is necessary. With their mouth, which has two stylets, they can pierce
cells and than suck up the intracellular fluid. They are detritivorous, omnivorous or predatory. The gut is straight and complete. Sexes are separate. The
animals as well as the eggs can survive long periods of drought. Their