Diel hypoxia in marsh creeks impairs the reproductive capacity of estuarine fish populations
نویسندگان
چکیده
منابع مشابه
Widespread endocrine disruption and reproductive impairment in an estuarine fish population exposed to seasonal hypoxia.
The long-term effects on marine fish populations of the recent increase worldwide in the incidence of coastal hypoxia are unknown. Here we show that chronic environmental exposure of Atlantic croaker (Micropogonias undulatus) to hypoxia in a Florida estuary caused marked suppression of ovarian and testicular growth which was accompanied by endocrine disruption. Laboratory hypoxia studies showed...
متن کاملNutrition and reproductive capacity in fish.
they lick the surface of her body and is passed on from one individual to another. This substance inhibits the worker bees from building brood cells for new queens. It also inhibits the development of eggs by laying workers. Whether this is a direct effect of the ‘queen substance’ on metabolism or whether the substance serves merely as a token stimulus to the central nervous system, causing the...
متن کاملPopulations of methane-producing bacteria and in vitro methanogenesis in salt marsh and estuarine sediments.
Most probable numbers (MPNs) of methanogens in various salt marsh and estuarine sediments were determined with an anaerobic, habitat-simulating culture medium with 80% H(2) plus 20% CO(2) as substrate. Average MPNs for the short Spartina (SS) marsh sediments of Sapelo Island, Ga., were maximal at the 5- to 7-cm depth (1.2 x 10/g of dry sediment). Populations decreased to approximately 880/g of ...
متن کاملSevere hypoxia impairs lateralization in a marine teleost fish.
In intertidal environments, the recurring hypoxic condition at low tide is one of the main factors affecting fish behaviour, causing broad effects on ecological interactions. We assessed the effects of hypoxia on lateralization (e.g. the tendency to turn left or right), a behaviour related to brain functional asymmetry, which is thought to play a key role in several life history aspects of fish...
متن کاملRain reverses diel activity rhythms in an estuarine teleost.
Activity rhythms are ubiquitous in nature, and generally synchronized with the day-night cycle. Several taxa have been shown to switch between nocturnal and diurnal activity in response to environmental variability, and these relatively uncommon switches provide a basis for greater understanding of the mechanisms and adaptive significance of circadian (approx. 24 h) rhythms. Plasticity of activ...
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 2009
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps08182