Tanichthys

Abstract: Aphyocypris pooni Lin is shown to be a junior homonym of Aphyocypris pooni Herre and the latter is found to be a synonym of Tanichthys albonubes Lin. Lin's species is referred to the genus Hemigrammocypris Fowler, which is redefined. A new name, Hemigrammocypris lini, is proposed for Aphyocypris pooni Lin. Both Hemigrammocypris lini and Tanichthys albonubes are redescribed and the latter is shown to consist of at least two different color variations, apparently representing populations from Hong Kong and White Cloud Mountain near Canton, China. The genus Tanichthys is redefined and some possible relationships of Tanichthys and Hemigrammocypris to other minnow genera are discussed.

Abstract: The white cloud mountain minnow Tanichthys albonubes Lin is an endemic species to southern China and the genus has two species, Tanichthys albonubes Lin and Tanichthys micagemmae Freyhof et Herder. The distribution range of T. albonubes Lin and T. micagemmae is very narrow and only found in the mountain brooks of Baiyunshan Mountain (White Cloud Mountain), Huaxian Country and the vicinity of Guangzhou in Guangdong Province and Halong, Quang Ninh Province, Vietnam respectively. The wild populations of this fish had already been on the verge of extinction when Shu-Yan Lin first discovered it in 1932 at the Baiyunshan Mountain. It was believed to be extinct in the wild because there were no reports of this fish in the wild since 1980. In September 2003, a small and isolated population of the fish was discovered in a mountain puddle in the north vicinity of Guangzhou. Additional studies are needed to determine the survival and propagation of the released fish. The protection of their natural habitat should be implemented.

Abstract: White cloud mountain minnow (Tanichthys albonubes Lin) is an endemic species.It has been listed a second-class state protected animal of China.The species was already on the verge of extinction when LIN Shu-yan first discovered it in 1932 at the Baiyunshan Mountain.Its distribution area is very narrow and only distributed in the mountain brooks of the Baiyunshan Mountain,Huadu City,Longgang in Shenzhen,Hong Kong and the vicinity of Guangzhou in Guangdong Province.It was deeply convinced to extinct in nature because there was not a report of the fish in the wild state since 1980.In September 2003,its population in wild state was discovered in a mountain puddle where spring well up and slow-move on the vicinity of Guangzhou.It likes to stay in clear shallow water with thick growth of weeds.Some basic studies have been done to wild T.albonubes on the morphologic characteristic,feed habits,habitat,growth and reproduction,and factors of endangerment and protect.

Abstract: The ornamental fish aquaculture represents a consolidated market worldwide. In Brazil, the major volume of commercialized freshwater ornamental fish is originated from fish farms managed by small and midsized farmers. The aim of this study was to characterize the metazoan parasitic fauna associated with the main freshwater ornamental fish farmed in Southern Brazil. Between July 2014 and January 2015, 423 fishes belonging to nine freshwater species were examined: angelfish Pterophylum scalare , siamese fighting fish Betta splendens , telescope and comet goldfish Carassius auratus , zebrafish Danio rerio , blood red swordtail Xiphophorus helleri , caramel and wagtail platy fish Xiphophorus maculatus , black molly Poecilia sphenops , white cloud mountain minnow Tanichthys albonubes and goldfinned barb Puntius sachsii . Water quality was measured in fishponds from each facility. Specimens were obtained from three ornamental fish farms located in three micro-regions in the State of Santa Catarina (Biguacu, Camboriu e Joinville). Parasitological indexes were obtained after parasitological analysis of mucus, gills, and eyes. Trichodinids, Piscinoodinium pillulare , and Ichthyophthirius multifiliis were found in all fish farms analyzed. However, P. pillulare showed the greatest prevalence and mean intensity, compared to the other protozoa analyzed. 75% prevalence and mean intensity 57.5 were observed in the gills of P. scalare from fish farm Araquari. This study showed that fish farm Biguacu, was the facility presenting the greatest parasite diversity. P. scalare and C. auratus were the most parasitized fish species presenting the higher richness when compared to another species. These ornamental species are widely traded and require greater care in cultivation because it is essential to produce healthy fish with attractive features accepted by the market.