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Head-to-body size allometry in wasps (Vespidae): does brain housing constrain the evolution of small body sizes?

  • S. O’DonnellEmail author
Short Communication

Abstract

Species of wasps in the Vespidae family range widely in body size. Vespid wasp species’ mean brain size increases relative to head capsule size in smaller species. In this study, I tested whether head capsule size varied allometrically with overall body size. I compared species ranging in body size from some of the largest to the smallest species. I found that relative head capsule volume and weight showed negative allometry with body size: relative head size was larger in smaller species. This significant negative relationship held after accounting for phylogenetic effects, and the negative allometry held when only social species were analyzed. I suggest that limits on minimum brain size have affected the evolution of body allometry in vespid wasps. Negative head-to-body allometry may be caused by the need to accommodate relatively large brains in smaller bodied species, and brain-driven needs for allometrically enlarged heads could place lower limits on body size evolution in the Vespidae. The relatively large brains of small species could affect head capsule cuticle thickness or muscle mass, with biomechanical implications for species’ behavior and ecology.

Keywords

Biomechanics Brain evolution Constraints Haller’s rule Independent contrasts Polistinae 

Notes

Acknowledgements

Meghan Barrett, Susan Bulova, Sara Deleon, and Katherine Fiocca assisted with morphological data collection. Research was funded by NSF grant 1209072 and the Drexel College of Arts and Sciences. William Wcislo and an anonymous reviewer made valuable comments on an earlier version of this paper.

References

  1. Beutel RG, Pohl H, Hunefeld F (2005) Strepsipteran brains and effects of miniaturization (Insecta). Arthropod Struct Dev 34:301–313CrossRefGoogle Scholar
  2. Downing HA, Jeanne RL (1983) Correlation of season and dominance status with activity of exocrine glands in Polistes fuscatus (Hymenoptera: Vespidae). J Kans Entomol Soc 56:387–397Google Scholar
  3. Dudley R (2002) The biomechanics of insect flight: form, function, evolution. Princeton University Press, Princeton, NJ, p 496Google Scholar
  4. Eberhard WG, Wcislo WT (2011) Grade changes in brain–body allometry: morphological and behavioural correlates of brain size in miniature spiders, insects and other invertebrates. Adv Insect Physiol 40:155–214CrossRefGoogle Scholar
  5. Feuerbacher E, Fewell JH, Roberts SP, Smith EF, Harrison JF (2003) Effects of load type (pollen or nectar) and load mass on hovering metabolic rate and mechanical power output in the honey bee Apis mellifera. J Exp Biol 206:1855–1865CrossRefGoogle Scholar
  6. Gonzalez-Voyer A, Winberg S, Kolm N (2009) Distinct evolutionary patterns of brain and body size during adaptive radiation. Evolution 63:2266–2274CrossRefGoogle Scholar
  7. Grebennikov VV (2008) How small you can go: factors limiting body miniaturization in winged insects with a review of the pantropical genus Discheramocephalus and description of six new species of the smallest beetles (Pterygota: Coleoptera: Ptiliidae). Eur J Entomol 105:313–328CrossRefGoogle Scholar
  8. Hanken J (1983) Miniaturization and its effects on cranial morphology in plethodontid salamanders, Genus Thorius (Amphibia, Plethodontidae): II. The fate of the brain and sense organs and their role in skull morphogenesis and evolution. J Morphol 177:255–268CrossRefGoogle Scholar
  9. Hanken J (1984) Miniaturization and its effects on cranial morphology in plethodontid salamanders, genus Thorius (Amphibia: Plethodontidae) I. Osteological variation. Biol J Linn Soc 23:55–75CrossRefGoogle Scholar
  10. Harrison JF, Roberts SP (2000) Flight respiration and energetics. Annu Rev Phys 62:179–205CrossRefGoogle Scholar
  11. Kovacs JL, Hoffman EA, Marriner SM, Goodisman MA (2010) Detecting selection on morphological traits in social insect castes: the case of the social wasp Vespula maculifrons. Biol J Linn Soc 101:93–102CrossRefGoogle Scholar
  12. Landolt PJ, Akre RD (1979) Occurrence and location of exocrine glands in some social Vespidae (Hymenoptera). Ann Entomol Soc Am 72:141–148CrossRefGoogle Scholar
  13. Muscedere ML, Gronenberg W, Moreau CS, Traniello JF (2014) Investment in higher order central processing regions is not constrained by brain size in social insects. Proc R Soc B 281:20140217CrossRefGoogle Scholar
  14. Niven JE, Farris SM (2012) Miniaturization of nervous systems and neurons. Curr Biol 22:323–329CrossRefGoogle Scholar
  15. Noll FB, Wenzel JW, Zucchi R (2004) Evolution of caste in Neotropical swarm-founding wasps (Hymenoptera: Vespidae; Epiponini). Am Mus Novit 3467:1–24CrossRefGoogle Scholar
  16. O’Donnell S (1998) Reproductive caste determination in eusocial wasps (Hymenoptera: Vespidae). Ann Rev Entomol 43:323–346CrossRefGoogle Scholar
  17. O’Donnell S, Bulova SJ, Barrett M, Fiocca K (2018) Size constraints and sensory adaptations affect mosaic brain evolution in paper wasps (Vespidae: Epiponini). Biol J Linn Soc 123:302–310CrossRefGoogle Scholar
  18. Ocampo D, Barrantes G, Uy JAC (2018) Morphological adaptations for relatively larger brains in hummingbird skulls. Ecol Evol 8:10482–10488CrossRefGoogle Scholar
  19. O’Donnell S, Bulova SJ (2017) Development and evolution of brain allometry in wasps (Vespidae): size, ecology and sociality. Curr Opin Insect Sci 22:54–61CrossRefGoogle Scholar
  20. Perrard A, Villemant C, Carpenter JM, Baylac M (2012) Differences in caste dimorphism among three hornet species (Hymenoptera: Vespidae): forewing size, shape and allometry. J Evol Biol 25:1389–1398CrossRefGoogle Scholar
  21. Piekarski PK, Carpenter JM, Lemmon AR, Moriarty Lemmon E, Sharanowski BJ (2018) Phylogenomic evidence overturns current conceptions of social evolution in wasps (Vespidae). Mol Biol Evol 35:2097–2109CrossRefGoogle Scholar
  22. Polilov AA (2015) Small is beautiful: features of the smallest insects and limits to miniaturization. Annu Rev Entomol 60:103–121CrossRefGoogle Scholar
  23. Polilov AA, Makarova AA (2017) The scaling and allometry of organ size associated with miniaturization in insects: a case study for Coleoptera and Hymenoptera. Sci Rep 7:43095CrossRefGoogle Scholar
  24. Quesada R, Triana E, Vargas G, Douglass JK, Seid MA, Niven JE, Eberhard WG, Wcislo WT (2011) The allometry of CNS size and consequences of miniaturization on orb-weaving and cleptoparasitic spiders. Arthropod Struct Dev 40:521–529CrossRefGoogle Scholar
  25. Raveret Richter M (2000) Social wasp (Hymenoptera: Vespidae) foraging behavior. Annu Rev Entomol 45:121–150CrossRefGoogle Scholar
  26. Richards OW (1978) The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London, p 580Google Scholar
  27. Roth G, Rottluff B, Grunwald W, Hanken J, Linke R (1990) Miniaturization in plethodontid salamanders (Caudata: Plethodontidae) and its consequences for the brain and visual system. Biol J Linn Soc 40:165–190CrossRefGoogle Scholar
  28. Sarmiento CE (2004) A test of adaptive hypotheses: mandibular traits, nest construction materials, and feeding habits in neotropical social wasps (Vespidae, Polistinae). Insect Soc 51:387–391CrossRefGoogle Scholar
  29. Seid MA, Castillo A, Wcislo WT (2011) The allometry of brain miniaturization in ants. Brain Behav Evol 77:5–13CrossRefGoogle Scholar
  30. Webb CO, Ackerly DD, Kembel SW (2008) Phylocom: software for the analysis of phylogenetic community structure and character evolution. Bioinformatics 24:2098–2100CrossRefGoogle Scholar
  31. West-Eberhard MJ (1982) The nature and evolution of swarming in tropical social wasps (Vespidae, Polistinae, Polybiini). In: Jaisson P (ed) Social insects in the tropics, vol I. University of Paris Press, ParisGoogle Scholar
  32. Yeh J (2002) The effect of miniaturized body size on skeletal morphology in frogs. Evolution 56:628–641CrossRefGoogle Scholar

Copyright information

© International Union for the Study of Social Insects (IUSSI) 2019

Authors and Affiliations

  1. 1.Biodiversity Earth and Environmental ScienceDrexel UniversityPhiladelphiaUSA

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