Using acoustic cue statistics in matrix population models to study short‐term and long‐term marine mammal population dynamics in the northern Gulf of Mexico.

2011 ◽  
Vol 129 (4) ◽  
pp. 2372-2372
Author(s):  
Natalia Sidorovskaia ◽  
Azmy Ackleh ◽  
Nabendu Pal ◽  
Juliette W. Ioup ◽  
George E. Ioup ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Gulf Of Mexico ◽  
Marine Mammal ◽  
Population Models ◽  
Matrix Population Models ◽  
Short Term ◽  
Northern Gulf Of Mexico

Long-term acoustic monitoring of marine mammal response to the 2010 oil spill in the Northern Gulf of Mexico

2011 ◽  
Vol 130 (4) ◽  
pp. 2537-2537
Author(s):  
Natalia Sidorovskaia ◽  
Azmy S. Ackleh ◽  
Baoling Ma ◽  
Christopher Tiemann ◽  
George E. Ioup ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Oil Spill ◽  
Marine Mammal ◽  
Acoustic Monitoring ◽  
Northern Gulf Of Mexico

scholarly journals Extensive reproductive disruption, ovarian masculinization and aromatase suppression in Atlantic croaker in the northern Gulf of Mexico hypoxic zone

2011 ◽  
Vol 279 (1726) ◽  
pp. 28-38 ◽  
Author(s):  
Peter Thomas ◽  
Md. Saydur Rahman
Keyword(s):  
Gulf Of Mexico ◽  
Mississippi River ◽  
Aromatase Activity ◽  
Northern Gulf Of Mexico ◽  
Hypoxia Exposure ◽  
Hypoxic Zone ◽  
Seasonal Hypoxia ◽  
Reproductive Disruptions ◽  
Reproductive Disruption

The long-term impacts on marine ecosystems of the recent dramatic worldwide increase in the incidence of coastal hypoxia are unknown. Here, we show widespread reproductive disruption in Atlantic croakers collected from hypoxic sites approximately 120 km apart in the extensive northern Gulf of Mexico continental shelf hypoxic zone. Gonadal growth and gamete production were impaired in croakers from hypoxic sites compared with fish from reference normoxic sites east of the Mississippi River Delta. Male germ cells were detected in approximately 19 per cent of croaker ovaries collected in the hypoxic region, but were absent in ovaries from normoxic sites. In addition, the sex ratio was skewed towards males at the hypoxic sites. The masculinization and other reproductive disruptions were associated with declines in neuroendocrine function, as well as ovarian and brain expression of aromatase (the enzyme that converts androgens to oestrogens). A similar incidence of ovarian masculinization and decline in ovarian aromatase expression were observed in croaker after chronic laboratory hypoxia exposure, indicating that ovarian masculinization is a specific hypoxia response and is due to decreased aromatase activity. The results suggest severe reproductive impairment can occur over large coastal regions in marine fish populations exposed to seasonal hypoxia, with potential long-term impacts on population abundance.

scholarly journals Long-Term Observations of Epibenthic Fish Zonation in the Deep Northern Gulf of Mexico

PLoS ONE ◽  
2012 ◽  
Vol 7 (10) ◽  
pp. e46707 ◽  
Author(s):  
Chih-Lin Wei ◽  
Gilbert T. Rowe ◽  
Richard L. Haedrich ◽  
Gregory S. Boland
Keyword(s):  
Gulf Of Mexico ◽  
Northern Gulf Of Mexico
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