Copepodite Diapause
Abstract A diapause (noun, adjective, and verb) is a seasonal resting period of low activity and metabolism, akin to hibernation and aestivus. Winter burial of Cyclops (Chapter 14) is an example. Copepods of oceans and estuaries have two modes: 1) late copepodites load with lipids then descend far d...
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| Format: | Book Part |
| Language: | English |
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Oxford University PressNew York
2023
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| Online Access: | http://dx.doi.org/10.1093/oso/9780197637326.003.0015 https://academic.oup.com/book/chapter-pdf/58024840/oso-9780197637326-chapter-15.pdf |
| Summary: | Abstract A diapause (noun, adjective, and verb) is a seasonal resting period of low activity and metabolism, akin to hibernation and aestivus. Winter burial of Cyclops (Chapter 14) is an example. Copepods of oceans and estuaries have two modes: 1) late copepodites load with lipids then descend far down, find neutral buoyancy and just hang still for whole seasons that vary by location and species, and 2) females spawn eggs of two distinct kinds, one equipped for immediate development and one for rest in the sediment (Chapter 17). Research on the significance and physiology of copepodite diapause in the family Calanidae started with studies of Calanus finmarchicus in Scottish sea lochs by Sheina Marshall and A. P. Orr. They demonstrated diapause from early summer until late winter. Results from across the North Atlantic and more recent decades are presented, particularly featuring work on up- and down-regulation of genes between active Calanus and those approaching or in diapause. Bios of Ann Tarrant and Mark Baumgartner, cooperating scientists at Woods Hole Oceanographic Institution, introduce their results: Ann’s from gene regulation studies and Mark’s on Right Whales feeding in deep layers of C. finmarchicus in diapause. |
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