The life cycle of Sphaerospora truttae (Myxozoa:Myxosporea) and some features of the biology of both the actinosporean and myxosporean stages

A Özer, R Wootten
2000 Diseases of Aquatic Organisms  
The life cycle of Sphaerospora truttae (Myxozoa: Myxosporea) and some features of the biology of both the actinosporean and myxosporean stages 'University of Stirling, Institute of Aquaculture, Stirling FK9 4LA, Scotland. UK 20ndokuzmayis Universitesi. Su ~r i i n l e r i Fakiiltesi. 57000 Sinop, Turkey ABSTRACT A previously undescnbed echinactinomyxon type actinosporean was shown experimentally to be the alternate stage of Sphaerospora truttae. The echinactinomyxon type spores were found to be
more » ... released from Lumbriculus variegatus and occasionally Tubifex tubifex. Overall ~nfection prevalence of the echinactinomyxon was 0.14%. Peak release was in March-May each year S. truttae spores developed in experimentally infected salmon 4.5 mo post-exposure to echinactinomyxon spores. Extrasporogonic stages of S. truttae first appeared in naturally infected salmon in early July and persisted for 8 to 10 wk. Correlation between peak release of echinactinomyxon spores and appearance of extrasporogonic stages of S. truttae is discussed. KEY W O R D S : Sphaerospora truttae -Life cycle .
doi:10.3354/dao040033 pmid:10785861 fatcat:rhehao4dw5bshhuv2r3qnars2e