Embryonic and larval development of the topmouth gudgeon, Pseudorasbora parva (Teleostei: Cyprinidae)

Abstract

ABSTRACT. The topmouth gudgeon, Pseudorasbora parva (Temminck & Schlegel, 1842), is a small cyprinid fish that inhabits the littoral zones of freshwater habitats throughout Asia and Europe. It is regarded as an invasive species in Europe, but in its native range, in China, as food and as an environmental bio-indicator. In this study, the embryonic and larval development of P. parva was investigated for the first time. The eggs of P. parva are transparent, adhesive and elliptical. The mean size of fertilized eggs was (1.63×1.31) ± 0.04 mm. From fertilization to hatching, embryonic development could be divided into eight stages and 34 phases, and the incubation period lasted for 109.25 hours at 24 ± 1 °C. Newly hatched larvae were 4.1 ± 3 mm in length, and the yolk absorption was completed within six days after hatching. The first and second swim bladders formed at the third and ninth day, respectively. The pectoral fin formed before the hatching stage, followed by the caudal, dorsal, anal and ventral fin formation after hatching. About 20 days after hatching, the morphology of the fry was similar to the adult fish. These findings provide a basis for determining the complete ontogeny of P. parva, as well as facilitate the management and utilization of this fish.

Spawning and developmental biology of endangered Pabdah catfish, Ompok pabda (Hamilton, 1822)

“…Rakhi et al (2015) have similarly found the first cleavage of Nandus nandus eggs at 0.3±0.01 h post fertilization at 26°C water temperature. According to Zhu et al (2018), about 54 min after fertilization the first cleavage furrow occurred in top mouth gudgeon, Pseudorasbora parva. However the 64 cell stage ( Figure 4I) was observed in 1.30 h and O. pabda took 1.50 h to complete cleavage stage besides appearing early morula stage ( Figure 4J) and late morula stage ( Figure 4K).…”

Embryonic and larval development of Labeobarbus megastoma and Labeobarbus platydorsus(pisces: cyprinidae) in lake tana (Ethiopia)

“…The embryogenesis of L. megastoma and L. platydorsus took a long duration, which agrees with L. brevicephalus, 3 Barbus intermedius, 17 Pseudorasbora parva, 22 African small Barbus B. anoplus 23 Previously Belay et al 3 ; Alekseyev et al 18 and Ryabov 17 worked on embryonic and larval development of L. brevicephalus, spawning of hexaploid large barbs and developmental aspects of L. intermedius in Lake Tana. The present study on the embryonic and larval development of these endemic species provides additional information on larval behavior, identification and developmental rates.…”

“…32 First cleavage of eggs of L. megastoma and L. platydorsus were observed similarly at about 1h and 30 min post-fertilization at the water temperature of 23.5 and 23.1°C. They are, slower than top mouth gudgeon P. parva 22 which took only 54min at 24±1°C and faster than white suker Catostomus commersoni 26 where the first cleavage furrow was visible within 2hr and 18min post-fertilization. These variations might be attributed to species difference and incubation temperature.…”

“…The organs of L. megastoma and L. platydorsus were almost developed before hatching, which is like H. maculatus, 37 P. guichenoti 38 and P. parva. 22 Development event from egg fertilization to heartbeat phase took about 42h and 41h and hatching begins at about 54 h and 62 h later in L. megastoma and L. platydorsus, respectively. A similar long time, about 73 and 75h, from the heartbeat stage to hatching were also reported in P. parva 22 and Siniperca chuatsi.…”

“…22 Development event from egg fertilization to heartbeat phase took about 42h and 41h and hatching begins at about 54 h and 62 h later in L. megastoma and L. platydorsus, respectively. A similar long time, about 73 and 75h, from the heartbeat stage to hatching were also reported in P. parva 22 and Siniperca chuatsi. 38 From the completion of the organ differentiation to hatching, the embryo remained in the membrane for a long time, which was described as a phenomenon named "delayed hatching".…”