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''C. finmarchicus'' is a zooplankton species, which is found in enormous amounts in the northern Atlantic Ocean. ==Distribution and ecology== ''C. finmarchicus'' is most commonly found in the North Sea and the Norwegian Sea. It is also found throughout the colder waters of the North Atlantic, especially off the coast of Canada, in the Gulf of Maine, and all the way up to western and northern Svalbard. ''Calanus finmarchicus'' is one of the most commonly found species of zooplankton in the subarctic waters of the North Atlantic. Sometimes confused with ''C. helgolandicus'' and ''C. glacialis'', ''C. finmarchicus'' is a large planktonic copepod whose chief diet includes diatoms, dinoflagellates, and other microplanktonic organisms. In fact, some studies have shown that heterotrophic microplankton provide a "prey resource sufficient for net lipid synthesis as well as egg production". ''C. finmarchicus'' is a key component in the food web of the North Atlantic, providing sustenance for a variety of marine organisms including fish, shrimp, and whales. Although the organism prefers these types of habitats, it has demonstrated that it is capable of surviving a wide range of environmental conditions. In terms of depth, ''C. finmarchicus'' can be found living anywhere from the ocean surface down to about deep. It can also live in waters as cold as and as warm as . Other environmental conditions and their ranges include salinity (18–36 pps), oxygen (1–9 mL/L), nitrate (0–45 μmol/L), phosphate (0–3 μmol/L) and silicate (1–181 μmol/L) levels.〔(【引用サイトリンク】publisher=Encyclopedia of Life )〕 ''C. finmarchicus'' primarily feeds on different forms of phytoplankton. This includes diatoms, dinoflagellates, ciliates, and other photosynthetic marine organisms. Some scientific evidence suggests that copepods like ''C. finmarchicus'' are feeding on microzooplankton as well. Mesozooplankton are among the most important components of their regional food web. Several species of harvestable fish, including cod, herring and red fish (along with a plethora of other marine life) depend on ''C. finmarchicus'' for some form of nourishment. Scientists working in Canada estimate that 90%–100% of larval redfish prey on ''Calanus'' eggs in the Gulf of the St. Lawrence.〔 ''C. finmarchicus'' is especially important ecologically because it shows rapid responses to climate variability, including shifts in species' distribution and abundance, timing of life history events, and trophic relationships. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Calanus finmarchicus」の詳細全文を読む スポンサード リンク
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