Striped bass, temperature, and eutrophication: a speculative hypothesis for environmental risk
Conference
·
OSTI ID:6410038
The paradoxical record of striped bass distribution and abundance, including population declines in coastal waters and variable success of freshwater introductions, is analyzed for consistency with a thermal niche-dissolved oxygen-squeeze hypothesis. A commonality among diverse field and laboratory observations supports a genetic-based thermal niche for the species that changes to lower temperatures as fish age. This shift can cause local conditions, especially warm surface strata and deoxygenated deep water, to be incompatible with the success of large fish. Crowding due to temperature preferences and avoidance of low oxygen concentrations can lead to pathological symptoms and over fishing, which may contribute to population declines. Through a mixture of evidence and conjecture, the thermal niche-dissolved oxygen hypothesis is proposed as a unified perspective of the habitat requirements of the species that can aid in its study and management. 141 references, 13 figures.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6410038
- Report Number(s):
- CONF-8209256-1; ON: DE84017329
- Country of Publication:
- United States
- Language:
- English
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