澳大利亚南澳州海岸今年冬季的墨鱼交配季出现严重衰退。1参与繁殖的成鱼数量仅为1811条，较去年的63000条下跌97%。1调查人员在8公里海岸线上进行了8次一小时潜水，于七月进行计数。1与此同时，记录到的卵数约为440枚，与通常数百万枚的产卵量形成鲜明对比。1
这一急剧衰退引发了对该物种前景的深切担忧。1持续超过18个月的有毒藻华被认为是造成种群数量崩溃的主要原因。1相比之下，该地区往年的墨鱼种群规模波动较大，2013年的低点为13500条，2020年达到峰值247000条。1鉴于墨鱼寿命仅12至18个月的生物特性，本季的极低繁殖数据可能预示着未来种群数量的进一步下滑。1
Australia's southern coast has experienced a dramatic collapse in giant cuttlefish reproduction this winter, with breeding numbers plummeting to record lows.1 Only 1,811 adult cuttlefish participated in mating during July surveys, representing a 97 percent decline from the 63,000 recorded the previous year.1 The number of eggs counted reached approximately 440, far below the typical millions laid during normal breeding seasons.1
A toxic algal bloom lasting more than 18 months since March of the previous year has been identified as the primary culprit behind the population crash.1 Researchers conducted eight one-hour diving surveys across an 8-kilometer stretch of coastline to document the decline.1 The situation has raised serious concerns about the species' survival prospects, with expert Stefan Andrews describing the situation as a "catastrophic decline."1 Manny Katz characterized the state of marine ecosystems in the region, stating that "our marine ecosystems are in real big trouble - the canary in the coal mine."1
Historically, the southern Australian giant cuttlefish population has fluctuated significantly, ranging from a low of 13,500 individuals in 2013 to a peak of 247,000 in 2020.1 Given that the species has a lifespan of 12 to 18 months, the current breeding failure threatens the population's recovery outlook for the coming seasons.1
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