Matuyama epoch, - chron
188
tomastigophora or phytoflagellates, and heterotrophic groups, together the
Zoomastigophora or zooflagellates. Within the five-kingdoms classification
(~organisms) used throughout this book, the term Mastigophora becomes
obsolete and is split up into different phyla, e.g., Euglenida, Dinoflagellata, Raphidophyta (autotrophic flagellates) and Zoomastigina (heterotrophic flagellates) of the kingdom Protoctista.
Matuyama epoch, -chron ~magnetostratigraphy.
maxillipeds the first pair(s) of the thoracic appendages of the Crustacea with a
feeding function.
maximum allowable concentration [(MAC); syn. maximum permissible concentration (MPC) 1 the highest concentration of any (harmful) substance allowed by
regulations to occur and not to be exceeded in any or a particular compartment of the environment. For the determination of MAC ~bioassay.
maximum sustainable yield (MSY) maximum harvest which is currently compensated by the fish production of the system. ~fishery science.
MBAL ~minimum biologically acceptable level.
mean the average (arithmetic mean) value of a set of observations. ~distribution.
meander originally a term indicating a bend in a river, but is by analogy also
applied to large bends in ocean currents, such as the Gulf Stream.
mean sea level ~sea level.
median the central value in a set of observations. ~distribution.
mediterranean seas seas that are separated from the ocean by land masses or
island chains and only connected with the ocean by more or less narrow
straits. Apart from the Mediterranean proper, the Caribbean, the Red Sea,
and the Arctic seas are considered mediterranean seas.
medusa (jellyfish) free-swimming reproductive life stage of Cnidaria. Bell- or
umbrella-shaped body of which the rhythmic muscular contractions serve
for propagation.
megabenthos large bottom-living organisms, ~benthos.
megalopa pelagic developmental stage of crabs (~Malacostraca) which comes after
the last larval stage or zoea. The megalopa has already the appearance of the
188
tomastigophora or phytoflagellates, and heterotrophic groups, together the
Zoomastigophora or zooflagellates. Within the five-kingdoms classification
(~organisms) used throughout this book, the term Mastigophora becomes
obsolete and is split up into different phyla, e.g., Euglenida, Dinoflagellata, Raphidophyta (autotrophic flagellates) and Zoomastigina (heterotrophic flagellates) of the kingdom Protoctista.
Matuyama epoch, -chron ~magnetostratigraphy.
maxillipeds the first pair(s) of the thoracic appendages of the Crustacea with a
feeding function.
maximum allowable concentration [(MAC); syn. maximum permissible concentration (MPC) 1 the highest concentration of any (harmful) substance allowed by
regulations to occur and not to be exceeded in any or a particular compartment of the environment. For the determination of MAC ~bioassay.
maximum sustainable yield (MSY) maximum harvest which is currently compensated by the fish production of the system. ~fishery science.
MBAL ~minimum biologically acceptable level.
mean the average (arithmetic mean) value of a set of observations. ~distribution.
meander originally a term indicating a bend in a river, but is by analogy also
applied to large bends in ocean currents, such as the Gulf Stream.
mean sea level ~sea level.
median the central value in a set of observations. ~distribution.
mediterranean seas seas that are separated from the ocean by land masses or
island chains and only connected with the ocean by more or less narrow
straits. Apart from the Mediterranean proper, the Caribbean, the Red Sea,
and the Arctic seas are considered mediterranean seas.
medusa (jellyfish) free-swimming reproductive life stage of Cnidaria. Bell- or
umbrella-shaped body of which the rhythmic muscular contractions serve
for propagation.
megabenthos large bottom-living organisms, ~benthos.
megalopa pelagic developmental stage of crabs (~Malacostraca) which comes after
the last larval stage or zoea. The megalopa has already the appearance of the