| effects of goldfish (carassius auratus) population size and body condition on the transmission of gyrodactylus kobayashii (monogenea). | field surveys indicate that host population size, rather than density, is the most important determinant of monogenean infection dynamics. to verify this prediction, epidemic parameters were monitored for 70 days at five host population sizes held at constant density using a goldfish - gyrodactylus kobayashii laboratory model. during the first 20 days, the rate of increase of prevalence and mean abundance was faster in small host populations. total mean prevalence and total mean abundance throug ... | 2017 | 28502259 |
| an infection of gyrodactylus kobayashii hukuda, 1940 (monogenea) associated with the mortality of goldfish (carassius auratus) from central china. | goldfish, carassius auratus, widely distributed across eurasia, is one of the earliest fish domesticated for ornamental purposes. a series of diseases break out due to high-density culture of goldfish, causing significant economic losses. here, we report for the first time an infection of gyrodactylus kobayashii associated with the high mortality of goldfish from a fish farm in anziying township of henan province, china, following their transfer to several aquariums. in the first 2 weeks after g ... | 2015 | 25471903 |
| the uterine epithelium of gyrodactylus kobayashii (monogenea: gyrodactylidae): ultrastructure of basal matrices, cytoplasmic membranes and the birth plug, and comparison with other reproductive epithelia. | ultrastructural details of reproductive epithelia in the viviparous monogenean gyrodactylus kobayashii are described. specimens of g. kobayashii were fixed for transmission electron microscopy in glutaraldehyde in sodium cacodylate buffer followed by either 1% aqueous osmium tetroxide or 1% aqueous osmium tetroxide reduced with 1.5% potassium ferricyanide. all reproductive epithelia are underlain by a fibrillar basal matrix. the uterine basal matrix is electron-opaque after potassium ferricyanid ... | 1998 | 9846619 |
| variation in the egg cell forming region of gyrodactylus kobayashii hukuda, 1940 (monogenea:gyrodactylidae). | the egg cell forming region of gyrodactylus kobayashii from goldfish (carassius auratus) is a thin nucleated cytoplasmic layer surrounding the developing egg cell (= oocyte). the cytoplasm contains numerous elougate membranes. as parasites age, the egg cell forming region becomes electron lucent. the apical membrane of the egg cell forming region becomes disrupted in places. a basal matrix is indistinct in new-born and young worms, becoming more evident as worms grow older. numerous pits (= basa ... | 1997 | 9193944 |