This study provides the first ultrastructural data of spermatozoa in the genus Lecithochirium. The spermatozoa of L. microstomum (from Trichiurus lepturus in Senegal) and L. musculus (from Anguilla anguilla in Corsica) exhibit the general pattern described in the great majority of the Digenea, namely two axonemes with the 9 + "1" pattern typical of the Trepaxonemata, one mitochondrion, a nucleu...

The trophic transfer of total mercury (THg) and its bioaccumulation from prey species to the predator fish Trichiurus lepturus was analysed in coastal waters of southeastern Brazil to evaluate the trace element dynamic in this predator-prey system. The isotopic (δ13C and δ15N) relation between this predator and its prey allowed inferences on prey assimilation and predator feeding habits. The TH...

This study was performed to obtain information on the sex ratio, spawning period, and size at sexual maturity for fishery management of largehead hairtail Trichiurus japonicus in Korean waters. The overall ratio (female, F; male, M) 1:0.46 (n = 1274 females:589 males, 68.4% female) as fish increased length, proportion females increased. oocyte development pattern group-synchronous development, ...

Largehead hairtail Trichiurus japonicus is a major commercial fish species in the Beibu Gulf of northwestern South China Sea. Despite much effort to protect fishery resource, current stock T. overexploited. As impacts climate change unfold globally, seasonal changes distribution largehead have not yet been clarified. Maximum entropy model based on mixed layer depth and salinity were projected o...