Morphology and behavior of crabs and gastropods from Lake Tanganyika, Africa: implications for lacustrine predatory-prey coevolution

K. West, Andrew Cohen, M. Baron

Research output: Contribution to journalArticle

100 Citations (Scopus)

Abstract

The endemic thiarid and viviparid gastropods from Lake Tanganyika have significantly thicker shells and higher frequencies of terminal apertural lip thickening than closely related cosmopolitan taxa from outside the lake. Tanganyikan gastropods also display considerably higher incidence of shell repair, following nonlethal shell damage, than comspolitan taxa of the same families. The endemic Tanganyikan potamonautid crab Platytelphusa armata (a molluscivore) possesses larger, more robust crushing chelae than other African potamonautid or potamonid crabs. Experiments with the endemic gastropods Spekia, Neothauma, Lavigeria spp., Paramelania spp. and the crab Platytelphusa armata showed that increased size, apertural lip thickness or shell sculpture reduced the successful predation rate of P. armata. Crabs with large chelae have a greater ratio of successful:unsuccessful attacks than crabs with small chelae. Among cases of successful predation, crabs with large chelae used predation methods that required less time and energy than the methods used by crabs with small chelae. Data together provide strong support for the idea that the endemic gastropods and crabs of Lake Tanganyika have coevolved over the past 7 M yr. -from Authors

Original languageEnglish (US)
Pages (from-to)589-607
Number of pages19
JournalEvolution
Volume45
Issue number3
StatePublished - 1991
Externally publishedYes

Fingerprint

Lake Tanganyika
Gastropoda
Tanzania
coevolution
Lakes
gastropod
crab
crabs
shell (molluscs)
lake
Lip
Arma
Sculpture
shell
predation
lips
Africa
crushing
Incidence
angle of incidence

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Ecology, Evolution, Behavior and Systematics
  • Agricultural and Biological Sciences (miscellaneous)
  • Genetics(clinical)
  • Ecology
  • Genetics

Cite this

Morphology and behavior of crabs and gastropods from Lake Tanganyika, Africa : implications for lacustrine predatory-prey coevolution. / West, K.; Cohen, Andrew; Baron, M.

In: Evolution, Vol. 45, No. 3, 1991, p. 589-607.

Research output: Contribution to journalArticle

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