Fecundity of migrating European eel (Anguilla anguilla) from Polish waters
2015
Marta Dębowska | Joanna Nowosad | Katarzyna Targońska | Daniel Żarski | Maria Biłas | Joanna Łuczyńska | Dariusz Kucharczyk
This study demonstrated that individual fecundity of 34 migrating European female eels <em>Anguilla anguilla</em> increases linearly with body weight (BW) and total length (TL). The total individual fecundity of fish from 560 to 1960 g BW was between 981 x 103 and 6320 x 103 eggs, respectively. The mean relative individual fecundity equalled 2415 x 103 (± 524 x 103) per kg BW. The values of this parameter ranged from 1753 x 103 to 3224.5 x 103 kg<sup>–1</sup>. Based on the results, it might be suggested that <em>A. anguilla</em> has lower total individual fecundity than New Zealand longfin eel (<em>Anguilla dieffenbachii</em>), American eel (<em>Anguilla rostrata</em>) and Japanese eel (<em>Anguilla japonica</em>) although it has one of the highest fecundity values per kg BW. Total fecundity was strongly depended from fat level in muscle (R<sup>2</sup> = 0.9523) and ovary (R<sup>2</sup> = 0.9531) as well as level of DHA content in ovary (R<sup>2</sup> = 0.8967) and muscle (R<sup>2</sup> = 0.6274) (N=10). There were no important relationship between total fecundity and protein level as well as in muscle and ovary
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