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Spatial distribution and abundance of larval and juvenile fish, chlorophyll and macrozooplankton around the Mississippi River discharge plume, and the role of the plume in fish recruitment
Grimes, C.B.; Finucane, J.H. (1991). Spatial distribution and abundance of larval and juvenile fish, chlorophyll and macrozooplankton around the Mississippi River discharge plume, and the role of the plume in fish recruitment. Mar. Ecol. Prog. Ser. 75(2-3): 109-119
In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630; e-ISSN 1616-1599, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Trefwoorden
    Abundance
    Developmental stages > Juveniles
    Developmental stages > Larvae > Fish larvae
    Motion > Fluid motion > Fluid flow > Plumes > River plumes
    Organism aggregations
    Population functions > Recruitment
    Teleostei [WoRMS]
    Marien

Auteurs  Top 
  • Grimes, C.B.
  • Finucane, J.H.

Abstract
    In September 1986, we collected neuston (1 x 2 m, 0.947 mm mesh) and surface chlorophyll a samples and hydrographic data at 46 stations around the discharge plume of the Mississippi River. Transects were positioned so that the 3 water masses in the plume area - plume water, Gulf of Mexico shelf water and frontal water (a mixture of the former 2) - were sampled. The plume was represented by a shallow lens of water < 34% salinity and < 29 degree C resting atop warmer (> 29°C) and more saline (> 34%) Gulf of Mexico shelf water. Strong turbidity fronts with a scale of 50 to 100 m form, relax and reform approximately at tidal frequencies within the frontal region that has a larger scale of 6 to 8 km. Total ichthyoplankton catch per tow, individual surface chlorophyll a values and macrozooplankton displacement volumes were all significantly greater in frontal water than adjacent Gulf of Mexico shelf or plume waters.

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