IMIS | Lifewatch regional portal

You are here


[ report an error in this record ]basket (0): add | show Print this page

Body shape convergence driven by small size optimum in marine angelfishes
Frédérich, B.; Santini, F.; Konow, N.; Schnitzler, J.; Lecchini, D.; Alfaro, M.E. (2017). Body shape convergence driven by small size optimum in marine angelfishes. Biol. Lett. 13(6): 5.
In: Biology Letters. Royal Society Publishing: London. ISSN 1744-9561; e-ISSN 1744-957X, more
Peer reviewed article  

Available in  Authors 

    Pomacanthidae Jordan & Evermann, 1898 [WoRMS]
Author keywords
    miniaturization; trait evolution; morphospace; Ornstein-Uhlenbeck;SURFACE; Pomacanthidae

Authors  Top 
  • Frédérich, B., more
  • Santini, F.
  • Konow, N.
  • Schnitzler, J., more
  • Lecchini, D.
  • Alfaro, M.E.

    Convergent evolution of small body size occurs across many vertebrate clades and may reflect an evolutionary response to shared selective pressures. However it remains unclear if other aspects of phenotype undergo convergent evolution in miniaturized lineages. Here we present a comparative analysis of body size and shape evolution in marine angelfishes (Pomacanthidae), a reef fish family characterized by repeated transitions to small body size. We ask if lineages that evolve small sizes show convergent evolution in body shape. Our results reveal that angelfish lineages evolved three different stable size optima with one corresponding to the group of pygmy angelfishes (Centropyge). Then, we test if the observed shifts in body size are associated with changes to new adaptive peaks in shape. Our data suggest that independent evolution to small size optima have induced repeated convergence upon deeper body and steeper head profile in Centropyge. These traits may favour manoeuvrability and visual awareness in these cryptic species living among corals, illustrating that functional demands on small size may be related to habitat specialization and predator avoidance. The absence of shape convergence in large marine angelfishes also suggests that more severe requirements exist for small than for large size optima.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors