pelagic trawl
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pelagic trawl ~trawl.
penetrating echosounder ~seismic instruments.
pennate diatoms ~Bacillariophyta.
peptide compound formed of two or more (polypeptide) amino acids, by an
amino (NH 2 ) group of one joining with a carboxyl (COOH) group of the
next, forming peptide links (-NH -CO- ) with elimination of water.
Peracarida superorder of the class Malacostraca, subphylum Crustacea (phylum Arthropoda). Contains seven orders that have in common that the females have a
ventral brood-pouch or marsupium: Mysidacea, Cumacea, Tanaidacea, Isopoda, Amphipoda and the small orders Thermosbaenacea (16 species) and Spelaeogriphacea (one species only).
pericardial cavity cavity in which the heart lies. In Arthropoda and Mollusca: a hemocoelic space supplying blood to the heart.
Peridinia ~Dinoflagellata.
periodicity ~biological dock.
periodic table table of chemical elements published in 1869 by D.l. Mendeleyev
(1834-1907), schematizing all chemical elements according to their atomic
number and atomic weight, taking into account their valences and general
chemical properties. In marine chemistry the table is of the utmost importance for a good understanding of the physical/chemical properties of elements in the oceans.
periphyton (syn. Aufwuchs) miscellaneous assemblage of organisms (both algae
and animals) attached or clinging to all free surfaces of objects submerged
in water (plants, wood, stones, rocks, etc.); best developed in the sublittoral
zone (~zonation).
perivisceral cavity ~coelom.
Permian ~geological time scale.
pesticides (1) substances or mixtures of substances intended for preventing,
destroying, repelling, or mitigating any pest (insect, rodent, nematode, fungus, weed, other forms of terrestrial or aquatic plant or animal life or viruses, bacteria, or other microorganisms) on or in living man or animals; (2)
substances or mixtures of substances intended for use as a plant regulator,
228
pelagic trawl ~trawl.
penetrating echosounder ~seismic instruments.
pennate diatoms ~Bacillariophyta.
peptide compound formed of two or more (polypeptide) amino acids, by an
amino (NH 2 ) group of one joining with a carboxyl (COOH) group of the
next, forming peptide links (-NH -CO- ) with elimination of water.
Peracarida superorder of the class Malacostraca, subphylum Crustacea (phylum Arthropoda). Contains seven orders that have in common that the females have a
ventral brood-pouch or marsupium: Mysidacea, Cumacea, Tanaidacea, Isopoda, Amphipoda and the small orders Thermosbaenacea (16 species) and Spelaeogriphacea (one species only).
pericardial cavity cavity in which the heart lies. In Arthropoda and Mollusca: a hemocoelic space supplying blood to the heart.
Peridinia ~Dinoflagellata.
periodicity ~biological dock.
periodic table table of chemical elements published in 1869 by D.l. Mendeleyev
(1834-1907), schematizing all chemical elements according to their atomic
number and atomic weight, taking into account their valences and general
chemical properties. In marine chemistry the table is of the utmost importance for a good understanding of the physical/chemical properties of elements in the oceans.
periphyton (syn. Aufwuchs) miscellaneous assemblage of organisms (both algae
and animals) attached or clinging to all free surfaces of objects submerged
in water (plants, wood, stones, rocks, etc.); best developed in the sublittoral
zone (~zonation).
perivisceral cavity ~coelom.
Permian ~geological time scale.
pesticides (1) substances or mixtures of substances intended for preventing,
destroying, repelling, or mitigating any pest (insect, rodent, nematode, fungus, weed, other forms of terrestrial or aquatic plant or animal life or viruses, bacteria, or other microorganisms) on or in living man or animals; (2)
substances or mixtures of substances intended for use as a plant regulator,