Spatial and temporal growth rate variation of Bay Anchovy (Anchoa mitchilli) larvae in the Mid Hudson River estuary

Rebecca Jordan, Angela M. Gospodarek, Eric T. Schultz, Robert K. Cowen, Kamazima Lwiza

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Estuaries are critical habitats for larvae and juveniles of many marine fishes, possibly because they promote high growth rates and survival rates. We investigated spatial and temporal changes in growth rate of larval bay anchovy (Anchoa mitchilli), in the middle Hudson River estuary where abundance of larvae is high. In two consecutive summer seasons, we sampled larvae at 4 sites evenly spaced over 45 km, at weekly intervals for up to a month. We examined otoliths to determine age in days and then used age-length regressions to estimate growth rate. In 1995, larval anchovy growth rates varied from 0.39 to 0.88 mm d-1 (median=0.48 mm d-1). In 1996, growth rates varied from 0.41 to 0.77 mm d-1 (median=0.55 mm d-1). In both years, we found significant spatial and temporal variation in growth rate. Larvae collected in the upper portion of Haverstraw Bay tended to grow more slowly than larvae collected in other sites. The dates on which the most rapidly growing larvae were collected varied from site to site. Neither temperature nor salinity variations explained growth rate differences. Growth rate variation, probably governed by patches of zooplankton, occurred on temporal scales of a week and spatial scales of 15 km.

Original languageEnglish (US)
Pages (from-to)683-689
Number of pages7
JournalEstuaries
Volume23
Issue number5
DOIs
StatePublished - Jan 1 2000
Externally publishedYes

Fingerprint

Hudson River
Estuaries
estuaries
Rivers
estuary
larva
larvae
river
anchovies
otoliths
marine fish
temporal variation
spatial variation
Anchoa mitchilli
zooplankton
otolith
survival rate
Fish
salinity
summer

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Aquatic Science
  • Environmental Science(all)

Cite this

Jordan, Rebecca ; Gospodarek, Angela M. ; Schultz, Eric T. ; Cowen, Robert K. ; Lwiza, Kamazima. / Spatial and temporal growth rate variation of Bay Anchovy (Anchoa mitchilli) larvae in the Mid Hudson River estuary. In: Estuaries. 2000 ; Vol. 23, No. 5. pp. 683-689.
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Spatial and temporal growth rate variation of Bay Anchovy (Anchoa mitchilli) larvae in the Mid Hudson River estuary. / Jordan, Rebecca; Gospodarek, Angela M.; Schultz, Eric T.; Cowen, Robert K.; Lwiza, Kamazima.

In: Estuaries, Vol. 23, No. 5, 01.01.2000, p. 683-689.

Research output: Contribution to journalArticle

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