ABSTRACT

Mogurnda clivicola (Flinders Ranges Mogurnda) inhabits three spring-fed water hole systems of two otherwise dry creek beds in the northern Flinders Ranges of South Australia. Between 2017 and 2022, the fish were monitored for breeding and growth and indicators of water quality. Heavy rainfall events in February 2020, November 2021 and January 2022 led to at least two creek floods which stimulated large scale spawning on two occasions during the monitoring period. One and a half months after spawning, young fish had grown to between 1.5 and 2.5 cm in length and then between 7.5 and 9.0 cm in length by 27 months of age. Water flow between pools in the creek during the floods, allowed the fish to move into downstream pools of water that have not previously held fish during the study period. A thorough sampling of fish length frequency to comprehensively sample age ranges in the population is easily achieved by combining two capture methods dip-nets and baited fish traps. A small proportion of fish have skin lesions, but their prevalence does not seem to be increasing.

摘要

斜纹夜蛾（弗林德斯山脉 Mogurnda）栖息在南澳大利亚弗林德斯山脉北部两条原本干涸的溪床的三个泉水补给水坑系统中。2017 年至 2022 年间，对鱼类的繁殖和生长情况以及水质指标进行了监测。2020 年 2 月、2021 年 11 月和 2022 年 1 月的强降雨事件导致至少两次溪流洪水，在监测期间两次刺激了大规模产卵。产卵后一个半月，幼鱼长到 1.5 至 2.5 厘米，到 27 个月时长到 7.5 至 9.0 厘米。洪水期间小溪中的水池之间的水流使鱼能够移动到下游的水池中，这些水池以前在研究期间没有养过鱼。通过结合两种捕获方法浸网和诱鱼陷阱，可以轻松地对鱼的长度频率进行全面抽样，以全面抽样种群中的年龄范围。一小部分鱼有皮肤损伤，但患病率似乎没有增加。