Chemical Mediation of Sperm Activity and Longevity in the Solitary Ascidians Ciona intestinalis and Ascidiella aspersa.

摘要: Sperm chemotaxis to compounds originating from eggs is common in solitary ascidians. This chemotactic response associated with an increase the activity level of sperm. Here we examine hypothesis that period sperm viability reduced by stimulation increased The and longevity two species ascidian, Ciona intestinalis Ascidiella aspersa, were measured after incubation water had been stored homospecific eggs. Our results showed proportion active egg water. corresponded a sharp decline longevity, which suggests causal link between longevity. We suggest energy reserves are conserved absence eggs, this may have significant ecological consequences for these organisms. Cross-reactivity one chemoattractant another ascidians, response. Therefore, investigated cross-reactivity activation C. A. aspersa heterospecific activated intestinalis, resulting viability, but was not reciprocated intestinalis. either respond higher degree specificity than sperm, or more generalized those