Spawning habitat of the Atlantic menhaden in Onslow Bay, North Carolina

David M. Checkley, Peter B. Ortner, Francisco E. Werner, Lawrence R. Settle, Shailer R. Cummings

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

The Continuous, Underway Fish Egg Sampler (CUFES) was used to sample pelagic eggs of the Atlantic menhaden (Brevoortia tyrannus) from 3-m depth off North Carolina in winter 1993-94 and 199495. Simultaneous measurements were made of temperature, salinity, and the concentration of chlorophyll a. The maximal concentration of eggs was 346 eggs m-3. Eggs were highly aggregated in patches which occurred between the Gulf Stream and mid-shelf fronts (17-23°C, 36.0-36.4‰). Unexpectedly, eggs were found almost exclusively in water of 20-60 m (mode 20 m) bottom depth. Thus, spawning appears related to bathymetry as well as hydrography. Variograms for egg concentration indicated a mean (± SE) patch scale of 3.6 ±1.7 km and a high degree of spatial variance explained by CUFES sampling. Lagrangian modelling of particles moving in response to tides, winds, and a prescribed flow from the north indicated that the region of observed, maximal occurrence of eggs is favourable for the retention of eggs and larvae on the shelf adjacent to inlets used to enter nursery areas.

Original languageEnglish (US)
Pages (from-to)22-36
Number of pages15
JournalFisheries Oceanography
Volume8
Issue numberSUPPL. 2
DOIs
StatePublished - Dec 1 1999

Keywords

  • Atlantic menhaden
  • Brevoortia tyrannus
  • CUFES
  • Gulf Stream
  • Model
  • Pelagic fish eggs
  • Recruitment
  • SABRE
  • Sampling
  • Spawning
  • Transport
  • Variogram

ASJC Scopus subject areas

  • Aquatic Science
  • Oceanography

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  • Cite this

    Checkley, D. M., Ortner, P. B., Werner, F. E., Settle, L. R., & Cummings, S. R. (1999). Spawning habitat of the Atlantic menhaden in Onslow Bay, North Carolina. Fisheries Oceanography, 8(SUPPL. 2), 22-36. https://doi.org/10.1046/j.1365-2419.1999.00019.x