| ultrastructure of sperm and spermatogenesis of cichlidogyrus thurstonae (platyhelminthes, monogenea, monopisthocotylea). | the present work is the first ultrastructural description of mature spermatozoon of the monogenetic trematode cichlidogyrus thurstonae recovered from the gills of the nile fish oreochromis niloticus. the mature spermatozoon of c. thurstonae is long and filiform with a nucleus, mitochondrion and a single axoneme, pressed tightly together for most of their length. as most other platyhelminthes, a solid central unit in the complex central element of the sperm axoneme is present. there are no periph ... | 2000 | 10786032 |
| dynamics of population of five parasitic monogeneans of oreochromis niloticus linné, 1757 in the dam of loumbila and possible interest in intensive pisciculture. | the study of the gill fishes of 176 oreochromis niloticus (l.) was undertaken in the dam of loumbila (burkina faso), in order to obtain the first information on the dynamics of population of the monogeneans parasites in a population of wild hosts. these data are essential in the search for means to avoid the enormous losses that often occur in intensive pisciculture. this analysis revealed the presence of five species of monogeneans (cichlidogyrus tilapiae, cichlidogyrus halli, cichlidogyrus thu ... | 2008 | 18817262 |
| ectoparasites of nile tilapia (oreochromis niloticus) in cage farming in a hydroelectric reservoir in brazil. | for this study, we performed a parasitological analysis of cage-cultured nile tilapia (oreochromis niloticus) from the água vermelha reservoir, southeastern brazil, and verified relationships with limnological data, seasonality, and fish growth phase. from march 2010 to march 2011, sixty-three specimens of o. niloticus in three growth phases (i.e., initial, intermediate, and final) were collected. all fish specimens were infested with at least one ectoparasite species (prevalence = 100%). five s ... | 2014 | 25054495 |