Detrimental effects of host anemone bleaching on anemonefish populations
Detrimental effects of host anemone bleaching on anemonefish populations
复制标题
宿主海葵白化对海葵鱼种群的不利影响
作者：
P. Saenz‐Agudelo;G. Jones;S. Thorrold;S. Planes
珊瑚白化和相关的珊瑚礁退化导致与珊瑚礁有关的鱼类数量显著下降。大多数对白化影响的关注都集中在珊瑚上，但白化在其他刺胞动物中也很普遍，包括海葵。海葵白化的后果尚不清楚，白化对相关鱼类招募、生存和繁殖的人口影响也知之甚少。我们研究了巴布亚新几内亚莫尔兹比港附近的栖息地退化，包括宿主海葵白化对鱼类丰度、产卵量和熊猫海葵鱼（Amphiprion polymnus）的招募的影响。由于该地区浅水温度异常，6 m以下的大部分浅水海葵（约占该地区海葵总数的35%）严重白化。海葵的死亡率较低，但漂白后的海葵体型减少了34%。白化和防护林面积的减少均不影响白蛉总数。与2008年相比，2009年生活在漂白海葵中的雌性产卵量减少了约38%，而在未漂白海葵上生活的雌性产卵量在年份之间没有显著差异。2009年的总招聘人数远低于2008年。然而，我们没有发现幼虫在定居时避开漂白海葵的证据，这表明其他因素或不同的化学线索在决定招募方面比栖息地质量更重要。这些结果首次提供了气候引起的白化和栖息地退化对海葵鱼繁殖和补充有害影响的实地证据。
Coral bleaching and related reef degradation have caused significant declines in the abundance of reef-associated fishes. Most attention on the effects of bleaching has focused on corals, but bleaching is also prevalent in other cnidarians, including sea anemones. The consequences of anemone bleaching are unknown, and the demographic effects of bleaching on associated fish recruitment, survival, and reproduction are poorly understood. We examined the effect of habitat degradation including host anemone bleaching on fish abundance, egg production, and recruitment of the panda anemonefish (Amphiprion polymnus) near Port Moresby, Papua New Guinea. Following a high-temperature anomaly in shallow waters of the region, most shallow anemones to a depth of 6 m (approximately 35% of all the anemones in this area) were severely bleached. Anemone mortality was low but bleached anemones underwent a ~34% reduction in body size. Total numbers of A. polymnus were not affected by bleaching and reduction in shelter area. While egg production of females living in bleached anemones was reduced by ~38% in 2009 compared to 2008, egg production of females on unbleached anemones did not differ significantly between years. Total recruitment in 2009 was much lower than in 2008. However, we found no evidence of recruiting larvae avoiding bleached anemones at settlement suggesting that other factors or different chemical cues were more important in determining recruitment than habitat quality. These results provide the first field evidence of detrimental effects of climate-induced bleaching and habitat degradation on reproduction and recruitment of anemonefish.
影响因子：
64.8
作者：
Grottoli, AG;Rodrigues, LJ;Palardy, JE
通讯作者：
Palardy, JE