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Comparative tests of evolutionary trade-offs in a palinurid lobster acoustic system.

Comparative tests of evolutionary trade-offs in a palinurid lobster acoustic system. Research Abstract Details 

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  • Comparative tests of evolutionary trade-offs in a palinurid lobster acoustic system. Abstract Text:

    Communication structures vary greatly in size and can be structurally and behaviorally integrated with other systems. In structurally integrated systems, dramatic changes in size may impose trade-offs with the size of neighboring structures. In spiny lobsters (Palinuridae), there is a fivefold difference in size of the antennular plate, on which sound producing apparatus is located, such that the antennular plate reaches 38% carapace length in some sound producers (Stridentes) compared to only 4% carapace length in non-sound producing spiny lobsters (Silentes). We examined whether this major variation in antennular plate size imposes trade-offs with the adjoining antennae, specifically in the context that the signal producing structures and antennae are both used in predator defense. We recorded and analyzed lobster sounds in order to test whether size increases in the acoustic morphology were correlated with production of particular signal features. Antennal and antennular plate structures were measured across the family, including both Stridentes and Silentes. Phylogenetic comparative methods were used to test for correlated evolutionary change among the structures and signal features. We analyzed the phylogenetic relationships of the Palinuridae based on morphological characters and ribosomal DNA evidence (16S, 18S and 28S nuclear and mitochondrial ribosomal RNA gene regions). We found that the number of sound pulses was positively correlated with length of the sound producing apparatus. Opposite to the predicted trade-offs, we found that the size of the antennular plate was positively correlated with size of the surrounding antennae within Stridentes. Nevertheless, when Stridentes were compared to Silentes, the latter had relatively larger antennae for a given antennular plate size than did the sound producing taxa. These results suggest that body size does not limit size increases in acoustic structures within Stridentes, however the presence and associated constructional costs of a sound producing apparatus may impose a trade-off when taxa with and without the apparatus are compared. Alternatively, since both systems are used in predator defense, this pattern may indicate greater selection for antennal force production in Silentes, which lack the additional acoustic mode of predator defense.

    Comparative tests of evolutionary trade-offs in a palinurid lobster acoustic system. Publishing Authors By Initials

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    Comparative tests of evolutionary trade-offs in a palinurid lobster acoustic system. Journal Published:

    PUBLICATION TYPE: Research Support, U.S. Gov't,

    Journal: Evolution; international journal of organic evolut

    VOLUME: 57

    Page Numbers: 2082-100

    Journal Abbreviation: Evolution

    ISSN: 0014-3820

    DAY: 4

    MONTH: Sep

    YEAR: 2003

    Comparative tests of evolutionary trade-offs in a palinurid lobster acoustic system. Information

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    LANGUAGE: eng

    NlmUniqueID: 373224

    Comparative tests of evolutionary trade-offs in a palinurid lobster acoustic system. Keywords Mesh Terms:

    KEYWORDS: Sequence Analysis, DNA

    MESH TERMS: physiology

    Chemical & Substance for Abstract: Comparative tests of evolutionary trade-offs in a palinurid lobster acoustic system. Information

    Substance Name: DNA, Ribosomal

    Registry Number: 0

    Grant and Affiliation Information for Comparative tests of evolutionary trade-offs in a palinurid lobster acoustic system.

    AFFILIATION: Biology Department, Duke University, Durham, North Carolina 27708, USA. patek@socrates.berkeley.edu

    Country: United States

    United States Research PublicationUnited States Research Publication

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    MEDLINETA: Evolution

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