Marine Biology

, Volume 143, Issue 6, pp 1161–1174

Geographic variation and behavioral evolution in marine plankton: the case of Mastigias (Scyphozoa, Rhizostomeae)

Research Article

DOI: 10.1007/s00227-003-1155-z

Cite this article as:
N Dawson, M. & Hamner, W.M. Marine Biology (2003) 143: 1161. doi:10.1007/s00227-003-1155-z

Abstract

Although complex behavior in marine zooplankton has been considered strong evidence of adaptation, ethological studies of marine zooplankton generally have not employed either the comparative approach or evolutionary perspective necessary to distinguish adaptation from any alternative. Consequently, the potential for intra-specific variation in the behavior of marine zooplankton has received insufficient attention and conclusions of adaptation remain poorly substantiated. Intra-specific comparison of patterns of migration and behavior for seven populations of golden jellyfish, Mastigias (Scyphozoa: Rhizostomeae), inhabiting isolated marine lakes and semi-enclosed lagoon coves in Palau document population specific differences in patterns of horizontal migration, vertical migration, pulse rate, swimming speed, and turning behavior. Evidence was found for symplesiomorphic behaviors, canalization, exaptation, adaptation, and probably once-deleterious traits. Behavioral evolution likely proceeded via, at least, relaxation of selection, trade-offs with morphology, and natural selection effected by predation. Behavioral patterns also may change with ontogeny. Geographic variation in the behavior of marine plankton therefore can be substantial and patterns of evolution complex. Behavioral evolution can rapidly generate coastal biodiversity. Thus, geographic variation in marine plankton is of potential interest to ethologists, evolutionary biologists, biogeographers, and conservation biologists.

Supplementary material

SD1 Statistical data describing horizontal distributions and instantaneous swimming directions of Mastigias medusae to accompany Figure 2

SD1.pdf (31 kb)
(PDF 32 KB)

SD2 Statistical data describing vertical distributions of Mastigias medusae to accompany Figures 4 and 5

SD2.pdf (30 kb)
(PDF 30 KB)

Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  1. 1.Department of Organismic Biology, Ecology and EvolutionUniversity of CaliforniaLos AngelesUSA
  2. 2.Coral Reef Research FoundationKororPalau
  3. 3.Centre for Marine and Coastal StudiesUniversity of New South WalesSydneyAustralia
  4. 4.Centre for Marine and Coastal StudiesUniversity of New South WalesSydneyAustralia