López-Casas S, Jiménez-Segura L F, Agostinho A A, Pérez C M
Grupo de Ictiología, Universidad de Antioquia, Calle 67 Número 53,108, laboratorio 7-308, 050010, Medellín, Antioquia, Colombia.
Nupelia, Universidade Estadual de Maringá, Avenida Colombo 5790, 87020-900, Maringá, Paraná, Brazil.
J Fish Biol. 2016 Jul;89(1):157-71. doi: 10.1111/jfb.12941. Epub 2016 Apr 13.
Magdalena River basin potamodromous fishes have two annual reproductive seasons: the subienda in the first half of the year and the mitaca in the second. Both upstream migrations are c. 30-45 days long; after that, with the onset of the rainy season, fishes spawn and remain in the river (resident individuals) or start a downstream movement (the bajanza) to return to the Magdalena floodplain lakes (nursery, shelter and feeding grounds). Due to their particular gonad development the bocachico Prochilodus magdalenae and probably the comelón Leporinus muyscorum are physiologically able to undertake two annual basin migrations. In the presence of dams or hydropower structures, fishes are able to find alternative migration routes. Some species should be re-classified in their migratory behaviour.
上半年的“苏比恩达”和下半年的“米塔卡”。两次溯河洄游都持续约30 - 45天；之后，随着雨季的到来，鱼类产卵并留在河中（定居个体）或开始向下游移动（“巴扬扎”），返回马格达莱纳河漫滩湖泊（育幼、庇护和觅食地）。由于其特殊的性腺发育，马格达莱纳锯脂鲤Prochilodus magdalenae以及可能还有穆伊斯科鲁姆兔脂鲤Leporinus muyscorum在生理上能够进行每年两次的流域洄游。在有大坝或水电设施的情况下，鱼类能够找到替代洄游路线。一些物种的洄游行为应重新分类。
