Larval abundance of summer flounder (Paralichthys dentatus) as a measure of recruitment and stock status

Kenneth Able, Mark C. Sullivan, Jonathan A. Hare, Gretchen Bath-Martin, J. Christopher Taylor, Roland Hagan

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Summer flounder (Paralichthys dentatus) is one of the most economically and ecologically important estuarine-dependent species in the northeastern United States. The status of the population is currently a topic of controversy. Our goal was to assess the potential of using larval abundance at ingress as another fishery independent measure of spawning stock biomass or recruitment. Weekly long-term ichthyoplankton time series were analyzed from Little Egg Inlet, New Jersey (1989-2006) and Beaufort Inlet, North Carolina (1986-2004). Mean size-at-ingress and stage were similar between sites, whereas timing of ingress and abundance at ingress were not similar. Ingress primarily occurred during the fall at Little Egg Inlet and the winter at Beaufort Inlet. These findings agree with those from earlier studies in which at least two stocks (one north and one south of Cape Hatteras) were identified with different spawning periods. Larval abundance at Little Egg Inlet has increased since the late 1990s and most individuals now enter the estuary earlier during the season of ingress. Abundance at Little Egg Inlet was correlated with an increase in spawning stock biomass, presumably because spawning by larger, more abundant fish during the late 1990s and early 2000s provided increased larval supply, at least in some years. Larval abundance at ingress at Beaufort Inlet was not correlated with spawning stock biomass or with larval abundance at ingress at Little Egg Inlet, further supporting the hypothesis of at least two stocks. Larval abundance at Little Egg Inlet could be used as a fisheryindependent index of spawning stock size north of Cape Hatteras in future stock assessments. Larval occurrence at Beaufort Inlet may provide information on the abundance of the stock south of Cape Hatteras, but additional stock assessment work is required.

Original languageEnglish (US)
Pages (from-to)68-78
Number of pages11
JournalFishery Bulletin
Volume109
Issue number1
StatePublished - Jan 24 2011

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Paralichthys dentatus
spawning
summer
egg
stock assessment
biomass
ichthyoplankton
Northeastern United States
time series analysis
estuaries
fisheries
winter
fishery
estuary
time series
fish

All Science Journal Classification (ASJC) codes

  • Aquatic Science

Cite this

Able, K., Sullivan, M. C., Hare, J. A., Bath-Martin, G., Taylor, J. C., & Hagan, R. (2011). Larval abundance of summer flounder (Paralichthys dentatus) as a measure of recruitment and stock status. Fishery Bulletin, 109(1), 68-78.
Able, Kenneth ; Sullivan, Mark C. ; Hare, Jonathan A. ; Bath-Martin, Gretchen ; Taylor, J. Christopher ; Hagan, Roland. / Larval abundance of summer flounder (Paralichthys dentatus) as a measure of recruitment and stock status. In: Fishery Bulletin. 2011 ; Vol. 109, No. 1. pp. 68-78.
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Able, K, Sullivan, MC, Hare, JA, Bath-Martin, G, Taylor, JC & Hagan, R 2011, 'Larval abundance of summer flounder (Paralichthys dentatus) as a measure of recruitment and stock status', Fishery Bulletin, vol. 109, no. 1, pp. 68-78.

Larval abundance of summer flounder (Paralichthys dentatus) as a measure of recruitment and stock status. / Able, Kenneth; Sullivan, Mark C.; Hare, Jonathan A.; Bath-Martin, Gretchen; Taylor, J. Christopher; Hagan, Roland.

In: Fishery Bulletin, Vol. 109, No. 1, 24.01.2011, p. 68-78.

Research output: Contribution to journalArticle

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Able K, Sullivan MC, Hare JA, Bath-Martin G, Taylor JC, Hagan R. Larval abundance of summer flounder (Paralichthys dentatus) as a measure of recruitment and stock status. Fishery Bulletin. 2011 Jan 24;109(1):68-78.