• Login
    About WHOAS
    View Item 
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • WHOI Technical Reports
    • View Item
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • WHOI Technical Reports
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of WHOASCommunities & CollectionsBy Issue DateAuthorsTitlesKeywordsThis CollectionBy Issue DateAuthorsTitlesKeywords

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Limits of Nematoscelis megalops in the northwestern Atlantic in relation to Gulf Stream cold core rings. I, Horizontal and vertical distributions

    Thumbnail
    View/Open
    WHOI-79-16.pdf (10.07Mb)
    Date
    1979-01
    Author
    Wiebe, Peter H.  Concept link
    Boyd, Steven H.  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/6978
    Location
    Gulf Stream
    DOI
    10.1575/1912/6978
    Keyword
     Ocean currents; Zooplankton; Atlantis II (Ship : 1963-) Cruise AII71; Atlantis II (Ship : 1963-) Cruise AII85; Chain (Ship : 1958-) Cruise CH111; Chain (Ship : 1958-) Cruise CH125; Knorr (Ship : 1970-) Cruise KN35; Knorr (Ship : 1970-) Cruise KN38; Knorr (Ship : 1970-) Cruise KN53; Oceanus (Ship : 1975-) Cruise OC7; Cold Core RIngs 
    Abstract
    The hydrographic limit of the distribution of Nematoscelis megalops in the Northwestern Atlantic Ocean is usually marked by the abrupt changes in water properties across the Gulf Stream. There are, however, isolated but repeated occurrences of this species in the Sargasso Sea. In our study, individuals in the Sargasso Sea were expatriates from the Slope Water which had been transported to the collection site by Gulf Stream cold core rings with but two exceptions. The exceptional cases can be indirectly linked to the presence of rings. Expatriated populations do not persist. Extinction in a ring appears to take place in one or two generations, and for N. megalops it is related to changes in hydrographic properties, and in particular, the vertical temperature structure. Both in the Slope Water and in the ring 50% or more of the population is found in a restricted temperature regime centered about 10°C. As a ring ages, the preferred temperature regime and N. megalops along with it move deeper into the water column. The physiological and biochemical data given by Boyd, Wiebe and Cox (1978) combined with data given here indicate that withdrawal from the surface results in progressive deterioration of the nutritional condition of the population, a cessation of growth, a drastic reduction in the number of males relative to females, reproductive incapacitation, and ultimate extinction. It is conceivable that a process similar to that occurring in rings is responsible for the maintenance of the Gulf Stream as a hydrographic limit in the distribution of N. megalops.
    Description
    Originally published in the Journal of marine research, v. 36, 1, 1978, pp. 119-142
    Collections
    • Biology
    • WHOI Technical Reports
    Suggested Citation
    Technical Report: Wiebe, Peter H., Boyd, Steven H., "Limits of Nematoscelis megalops in the northwestern Atlantic in relation to Gulf Stream cold core rings. I, Horizontal and vertical distributions", 1979-01, DOI:10.1575/1912/6978, https://hdl.handle.net/1912/6978
     

    Related items

    Showing items related by title, author, creator and subject.

    • Thumbnail

      Ping-through-the-hull 3.5 kHz echo-sounding systems on the research vessels CHAIN, ATLANTIS II, and KNORR 

      Knott, Sydney T.; Hess, Frederick R.; Witzell, Warren E.; Young, Earl M. (Woods Hole Oceanographic Institution, 1978-02)
      This report documents the 3.5. kHz sounding systems currently in use on Woods Hole research vessels. To help others to install similar facilities, we discuss the history, installation technique, performance and ...
    • Thumbnail

      Station locations for Atlantis II-73, Atlantis II-77, and Knorr-42 cruises and ALVIN dive tracks in the FAMOUS area 

      Heirtzler, James R.; Hays, Helen C. (Woods Hole Oceanographic Institution, 1977-02)
      Lists and positions of stations on cruises ATLANTIS II-73, ATLANTIS II-77, KNORR-42 and ALVIN dives on the Mid-Atlantic Ridge during Project FAMOUS are given. Station lists include those for camera, water temperature, ...
    • Thumbnail

      Drifting vertical current meter, moored aanderaa thermistor chain, and XBT data : Jasin 1978 Atlantis-II cruise (102) 

      Pennington, Nancy J.; Weller, Robert A. (Woods Hole Oceanographic Institution, 1981-10)
      The report presents summaries of three data sets taken at and in the vicinity of the oceanographic moorings deployed in the 1978 Joint Air-Sea Inte raction Project (JASIN). The data sets are: (1) the temperature, pressure ...
    All Items in WHOAS are protected by original copyright, with all rights reserved, unless otherwise indicated. WHOAS also supports the use of the Creative Commons licenses for original content.
    A service of the MBLWHOI Library | About WHOAS
    Contact Us | Send Feedback | Privacy Policy
    Core Trust Logo