| 词条 | Neocalanus cristatus |
| 释义 |
|name=Neocalanus cristatus | regnum = Animalia | phylum = Arthropoda | subphylum = Crustacea | classis = Maxillopoda | subclassis = Copepoda | ordo = Calanoida | familia = Calanidae | genus = Neocalanus | species = N. cristatus | binomial = Neocalanus cristatus | binomial_authority = (Krøyer, 1848) | synonyms =
}} Neocalanus cristatus is a species of copepod found primarily in the northern Pacific. DescriptionThe female usually ranges in length from about {{convert|7.6|to|10.4|mm|in}}. The male usually is between about {{convert|6.7|and|9.6|mm|in}} in length.[1] DistributionN. cristatus is found in the northern Pacific and, in lesser numbers, in the Chukchi Sea and the Arctic Sea.[1] It has also been recorded off of the coast of Chile.[2]EcologyLife cycle and reproductionAlthough N. cristatus breeds year round, it peaks in terms of reproductive activity from October to December. Breeding occurs at depth; at Station P, adults reproduce at depths below {{convert|250|m|ft}}.[3] At Site H, off of the east coast of Hokkaido, adults reproduce at depths below {{convert|500|m|ft}}. Here, adults are usually located from about {{convert|500|to|1500|m|ft}} in depth.[5] After being spawned, the nauplii ascend to the surface. During this ascent, they develop into stage VI nauplii or stage I copepodites.[4] According to studies in a laboratory with water at {{convert|2|C|F}}, it takes about 40 days for this development to happen.[5] The nauplii feed off of their large yolk during their growth.[3] Stage I through IV copepodites are found in the top {{convert|250|m|ft}} of depth.[5] During a period of the year, stage I through IV copepodites may be found from the thermocline to between about {{convert|200|and|250|m|ft}};[6] in some areas, this is correlated with high temperatures near the surface. It takes about four months to develop from a stage I to a stage V copepodite. Stage V copepodites migrate below {{convert|250|m|ft}} of depth in July and August and enter diapause, emerging as adults after September. Overall, the life cycle of N. cristatus is annual,[7] like the rest of its genus.[8] References1. ^{{EOL|1024161|Neocalanus cristatus}} 2. ^1 {{cite web|author1=Razouls C.|author2=de Bovée F.|author3=Kouwenberg J.|author4=Desreumaux N.|url=https://copepodes.obs-banyuls.fr/en/fichesp.php?sp=519|title=Diversity and Geographic Distribution of Marine Planktonic Copepods|year=2018|access-date=16 July 2018|publisher=Sorbonne Université, CNRS}} 3. ^1 {{cite journal|last1=Miller|first1=Charles B.|last2=Frost|first2=Bruce W.|last3=Batchelder|first3=Harold P.|last4=Clemons|first4=Martha J.|last5=Conway|first5=Richard E.|title=Life histories of large, grazing copepods in a subarctic ocean gyre: Neocalanus plumchrus, Neocalanus cristatus, and Eucalanus bungii in the Northeast Pacific|journal=Progress in Oceanography|volume=13|issue=2|year=1984|pages=201–243|issn=00796611|doi=10.1016/0079-6611(84)90009-0}} 4. ^{{cite journal|last1=Dagg|first1=Michael|title=Sinking particles as a possible source of nutrition for the large calanoid copepod Neocalanus cristatus in the subarctic Pacific Ocean|journal=Deep Sea Research Part I: Oceanographic Research Papers|volume=40|issue=7|year=1993|pages=1431–1445|issn=09670637|doi=10.1016/0967-0637(93)90121-I}} 5. ^{{cite journal|last1=Tsuda|first1=Atsushi|last2=Saito|first2=Hiroaki|last3=Kasai|first3=Hiromi|title=Life histories of Eucalanus bungii and Neocalanus cristatus (Copepoda: Calanoida) in the western subarctic Pacific Ocean|journal=Fisheries Oceanography|volume=13|issue=s1|year=2004|pages=10–20|issn=1054-6006|doi=10.1111/j.1365-2419.2004.00315.x}} 6. ^{{cite journal|last1=Tsuda|first1=Atsushi|last2=Saito|first2=Hiroaki|last3=Kasai|first3=Hiromi|last4=Nishioka|first4=Jun|last5=Nakatsuka|first5=Takeshi|title=Vertical segregation and population structure of ontogenetically migrating copepods Neocalanus cristatus, N. flemingeri, N. plumchrus, and Eucalanus bungii during the ice-free season in the Sea of Okhotsk|journal=Journal of Oceanography|volume=71|issue=3|year=2015|pages=271–285|issn=0916-8370|doi=10.1007/s10872-015-0287-3}} 7. ^1 2 {{cite journal|last1=Kobari|first1=T.|last2=Ikeda|first2=T.|title=Vertical distribution, population structure and life cycle of Neocalanus cristatus (Crustacea: Copepoda) in the Oyashio region, with notes on its regional variations|journal=Marine Biology|volume=134|issue=4|year=1999|pages=683–696|issn=0025-3162|doi=10.1007/s002270050584}} 8. ^{{cite journal|last1=Conover|first1=R. J.|title=Comparative life histories in the genera Calanus and Neocalanus in high latitudes of the Northern Hemisphere|journal=Hydrobiologia|volume=167|issue=1|year=1988|pages=127–142|issn=0018-8158|doi=10.1007/BF00026299}} 5 : Calanoida|Fauna of the Pacific Ocean|Fauna of the Arctic Ocean|Taxa named by Henrik Nikolai Krøyer|Crustaceans described in 1848 |
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