Dispersal without errors: symmetrical ears tune into the right frequency for survival

被引:54
作者
Gagliano, Monica [1 ,2 ,3 ]
Depczynski, Martial [1 ,2 ]
Simpson, Stephen D. [4 ]
Moore, James A. Y. [1 ,2 ]
机构
[1] James Cook Univ N Queensland, Australian Res Council Ctr Excellence Coral Reef, Townsville, Qld 4811, Australia
[2] James Cook Univ N Queensland, Sch Marine & Trp Biol, Townsville, Qld 4811, Australia
[3] Australian Inst Marine Sci, Townsville, Qld 4810, Australia
[4] Univ Edinburgh, Inst Evolutionary Biol, Sch Biol Sci, Edinburgh EH9 3JT, Midlothian, Scotland
基金
英国自然环境研究理事会;
关键词
fluctuating asymmetry; sound; dispersal; recruitment; population dynamics; otoliths;
D O I
10.1098/rspb.2007.1388
中图分类号
Q [生物科学];
学科分类号
07 [理学]; 0710 [生物学]; 09 [农学];
摘要
Vertebrate animals localize sounds by comparing differences in the acoustic signal between the two ears and, accordingly, ear structures such as the otoliths of fishes are expected to develop symmetrically. Sound recently emerged as a leading candidate cue for reef fish larvae navigating from open waters back to the reef. Clearly, the integrity of the auditory organ has a direct bearing on what and how fish larvae hear. Yet, the link between otolith symmetry and effective navigation has never been investigated in fishes. We tested whether otolith asymmetry influenced the ability of returning larvae to detect and successfully recruit to favourable reef habitats. Our results suggest that larvae with asymmetrical otoliths not only encountered greater difficulties in detecting suitable settlement habitats, but may also suffer significantly higher rates of mortality. Further, we found that otolith asymmetries arising early in the embryonic stage were not corrected by any compensational growth mechanism during the larval stage. Because these errors persist and phenotypic selection penalizes asymmetrical individuals, asymmetry is likely to play an important role in shaping wild fish populations.
引用
收藏
页码:527 / 534
页数:8
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