River Shannon Eels
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منابع مشابه
Eels (anguilla Anguilla (l.)) of the Lower River Shannon, with Particular Reference to Seasonality in Their Activity and Feeding Ecology
The general biology and seasonal ecology of eels from a riffle section of the lower reaches of Ireland’s largest river system, the River Shannon, were investigated. Eels at this location occurred in high densities, had a slow growth rate and were predominantly male at maturation. Although they fed to some degree all year round, foraging activity of the eels was highest in the months of May to S...
متن کاملThe River Shannon silver eel fisheries : variations in commercial and experimental catch levels i
Management of the eel fisheries of the River Shannon, Ireland’s largest river system, has involved van ous stock enhancement measures since 1959. Declining natural recruitmenr levels have limited the effecriveness of stocking programmes for nearly two decades. Observations on declining yellow eel stocks in several major lakes have been supported by the results of studies undertaken annually on ...
متن کاملDistribution and prevalence of Anguillicola crassus (Nematoda) in eels Anguilla anguilla of the rivers Rhine and Naab, Germany.
Over a period of 2 yr eels were collected at several sites along the river Rhine as well as from adjacent waters and examined for Anguillicola crassus in the swimbladder. Additionally eels were collected once from a site on the river Naab (Danube system). All eels were searched for both juvenile and adult stages of A. crassus, revealing prevalences of 80% in eels from the river Rhine and 39% in...
متن کاملPrevalence of Anguillicoloides crassus and growth variation in migrant yellow-phase American eels of the upper Potomac River drainage.
Prevalence of the non-native swim bladder nematode Anguillicoloides crassus has recently increased in American eels from estuaries of the North American Atlantic coast, but little is known about parasite prevalence or conditions of previous infection in upstream migrant eels within upper watersheds. This study is the first to confirm presence of A. crassus in the upper Potomac River watershed. ...
متن کاملMigratory behaviour and habitat use by American eels Anguilla rostrata as revealed by otolith microchemistry
The environmental history of American eels Anguilla rostrata from the East River, Nova Scotia, was investigated by electron microprobe analysis of the Sr:Ca ratio along transects of the eel otolith. The mean (±SD) Sr:Ca ratio in the otoliths of juvenile American eels was 5.42 × 10–3 ± 1.22 × 10–3 at the elver check and decreased to 2.38 × 10–3 ± 0.99 × 10–3 at the first annulus for eels that mi...
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تاریخ انتشار 2014