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Effects of the 1997-1998 El Niño on early-juvenile Pacific hake Merluccius productus: age, growth, abundance, and diet in coastal nursery habitats

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https://ir.library.oregonstate.edu/concern/articles/j098zb53h

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Abstract
  • The effects of anomalous oceanographic conditions on growth, abundance, spawn-date distributions, and diet of early-juvenile Pacific hake Merluccius productus were examined in nursery grounds off the coast of central California, USA. Spring collections from 2 consecutive years of El Nino conditions, 1997 and 1998, 1 year of La Nina conditions, 1999, and 1 non-anomalous year, 1995, were examined. During spring of 1997, the first year of the El Nino event, early-juvenile hake appeared to compensate for anomalous ocean conditions by ingesting a wider variety of zooplankton taxa and sizes. Continuation of El Nino conditions through spring 1998 appeared to have a strong impact on the 1998 year class. Very low levels of macrozooplankton biomass in February 1998 resulted in poor growth and reduced survival of hake from early spawns.
  • Keywords: Hake, Age and growth, food habits, El Nino effects
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  • Grover, J. J., Buckley, T. W., & Woodbury, D. (2002, September 12). Effects of the 1997-1998 El Niño on early-juvenile Pacific hake Merluccius productus: age, growth, abundance, and diet in coastal nursery habitats. Marine Ecology Progress Series, 240, 235-247.
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  • 240
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  • This work was partially supported by grant no. NA76RG0476 (project no. R/HAB-01-PD) from the National Oceanic and Atmospheric Administration to the Oregon State University Sea Grant College Program and by appropriations made by the Oregon State legislature.
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