Effects of nursery environmental cycles on larval red drum (Sciaenops ocellatus) growth and survival

SUMMARY: Red drum early larval stages migrate through coastal inlets and settle into shallow seagrass meadows within estuaries. This study describes environmental rhythms (ER) in red drum nursery habitats and evaluates their role in larval growth. Well-defined diel ER were observed in temperature (a...

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Bibliographic Details
Main Authors: Endocrine Function, Rafael Pérez-domínguez, Joan, G. Holt
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
KEY WORDS
red drum
settlement
recruitment
temperature
dissolved oxygen
Red drum
Sciaenops ocellatus
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.525.3297
http://water.usgs.gov/wrri/01grants/prog-compl-reports/2001TX3261B.pdf
Description
Summary:SUMMARY: Red drum early larval stages migrate through coastal inlets and settle into shallow seagrass meadows within estuaries. This study describes environmental rhythms (ER) in red drum nursery habitats and evaluates their role in larval growth. Well-defined diel ER were observed in temperature (amplitude: 2 to 4.5ºC) and dissolved oxygen (DO) (range: 2.9-7.5 mg O2 L-1), and sporadic cooling caused by cold fronts. We exposed groups of settlement sized larvae (4.9 mm standard length) to two oscillating temperature treatments (amplitudes: 3 and 6ºC; daily mean 27ºC), an oscillating DO treatment (range: 2.4-6.1 mg O2 L-1; daily mean 4.2 mg O2 L-1) and a control (no cycles; daily mean

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