Opsariichthys pachycephalus
| Opsariichthys pachycephalus | |
|---|---|
| |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Cypriniformes |
| Family: | Cyprinidae |
| Genus: | Opsariichthys |
| Species: | O. pachycephalus
|
| Binomial name | |
| Opsariichthys pachycephalus | |
| Synonyms | |
|
Zacco pachycephalus (Günther, 1868) | |
Opsariichthys pachycephalus is a species of
Colonization history
Opsariichthys pachycephalus populations show strong genetic structuring between drainages and weak genetic structuring within drainages. It is suggested that the current population structuring reflects colonization from two
Reproduction
Opsariichthys pachycephalus show two peak spawning periods, one in spring (February–April) and the other one in summer (June–August), the former being the main one. During the courtship, males chase after one female, showing aggressive behaviours among the males. Only the winner of the male-male contests follow the female to spawn. After spawning, the male may return to the spawning site to chase away egg predators.[3]