1. Pelagic spawning riverine fish (pelagophils) spawn in free‐flowing river habitats with downstream drift of eggs and larvae but the spatial scale is often unknown, and this constitutes a major ecological knowledge gap.
2. In the arid Darling River in south‐eastern Australia, the present objectives were: (i) to determine the potential downstream dispersal distance of young golden perch (Macquaria ambigua); and (ii) to evaluate whether provision of environmental water enhanced dispersal of young fish from Menindee Lakes to the lower Darling River (LDR) while also cueing further spawning in downstream lotic reaches.
3. Golden perch spawned in unregulated lotic tributaries on a flood pulse and larvae drifted or dispersed >1,600 km downstream and entered large ephemeral productive floodplain lake nursery habitats as fully scaled fingerlings.
4. Planned releases of environmental water cued golden perch spawning in the LDR and enabled juvenile fish to disperse downstream from the Menindee Lakes nursery into receiving populations in the LDR, Great Darling Anabranch, and southern Murray River, with some fish potentially completing an active migration of >2,100 km by age 1 year.
5. The Darling River case study highlights the need for a system‐scale approach to the conservation management of pelagophilic fish, along with multi‐year perennial flow strategies to improve ecosystem integrity in large rivers globally.

中文翻译：

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河滨产卵，长距离幼体漂流和泛滥鱼类的泛滥募集：以澳大利亚达令河干旱的金鲈（Macquaria ambigua）为例

1. 浮游产卵河鱼类（产卵亲鱼）在自由流动的河流生境中产卵，卵和幼虫向下游漂移，但空间规模常常是未知的，这构成了主要的生态知识鸿沟。
2. 在澳大利亚东南部干旱的达令河上，目前的目标是：（i）确定年轻的金鲈（Macquaria ambigua）的潜在下游扩散距离；（ii）评估提供环境水是否能促进幼鱼从Menindee湖到达令河下游的扩散，同时还提示下游的卢堤河产卵量进一步增加。
3. 金黄色的鲈鱼在洪水脉动下在不受管制的支流中产卵，幼虫向下游漂移或分散> 1,600 km，并进入幼稚的高产洪泛平原湖苗圃生境，成为完全成比例的鱼种。
4. 计划中的释放在LDR中产卵的环境水提示金鲈，并使幼鱼从Menindee湖苗圃的下游扩散到LDR，Great Darling Anabranch和南部Murray河的接收种群中，其中一些鱼可能会完成> 1岁以下2,100公里。
5. 达令河案例研究突出表明，需要采用系统规模的方法来管理嗜酸性鱼类的养护，以及多年期多年生水流策略，以改善全球大型河流的生态系统完整性。