Life history pattern of mosquitofish Gambusia holbrooki (Girard, 1859) in the Tajan River (Southern Caspian Sea to Iran)

2011 ◽  
Vol 29 (1) ◽  
pp. 167-173 ◽  
Author(s):  
Rahman Patimar ◽  
Mohsen Ghorbani ◽  
Ali Gol-Mohammadi ◽  
Hoda Azimi-Glugahi
Keyword(s):  
Life History ◽  
Caspian Sea ◽  
Gambusia Holbrooki ◽  
Tajan River ◽  
Life History Pattern ◽  
Southern Caspian Sea

A new fish based multi-metric assessment index for cold-water streams of the southern Caspian Sea Basin in Iran

2019 ◽  
Vol 102 (4) ◽  
pp. 645-662
Author(s):  
Hossein Mostafavi ◽  
Azad Teimori ◽  
Rafaela Schinegger ◽  
Stefan Schmutz
Keyword(s):  
Caspian Sea ◽  
Cold Water ◽  
Assessment Index ◽  
Southern Caspian Sea

Life History Changes in Eastern Mosquitofish (Gambusia holbrooki) Induced by Thermal Elevation

1991 ◽  
Vol 48 (1) ◽  
pp. 60-66 ◽  
Author(s):  
Gary K. Meffe
Keyword(s):  
South Carolina ◽  
Life History ◽  
Nuclear Reactor ◽  
Natural Populations ◽  
Life History Evolution ◽  
Gambusia Holbrooki ◽  
Genetic Changes ◽  
Thermal Death ◽  
Reproductive Biomass ◽  
Eastern Mosquitofish

Much light can be shed on life history evolution through study of responses of organisms to chronic exposure to a novel or perturbed environment. To determine the influence of 28 yr of temporally unpredictable thermal elevation on their life history patterns, I sampled eastern mosquitofish (Gambusia holbrooki) from a thermally elevated (outflow from a nuclear reactor) and an ambient (farm pond) habitat in South Carolina every month for 2 yr. Fish from the artificially heated environment reproduced all year, had higher reproductive investments (higher clutch sizes and reproductive biomass), and smaller offspring than did fish from the ambient environment, which ceased reproduction from October through March, typical for natural populations of the region. Likely environmental factors responsible for these differences include unpredictable food resources, higher mortality from thermal death, and higher predation by fishes and birds in the heated waters. The extent to which these life history alterations are the result of adaptive genetic changes versus phenotypically plastic responses remains to be tested.

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