Eusociality in a coral-reef shrimp

  title={Eusociality in a coral-reef shrimp},
  author={J. Emmett Duffy},
  • J. Duffy
  • Published 1 June 1996
  • Biology
  • Nature
THE apex of animal social organization is eusociality, which has three characteristics: overlapping generations, reproductive division of labour, and cooperative care of young1,2. So far, eusociality has been recognized only among social insects and the African mole-rats3–5. Here I report the first case of eusociality in a marine animal. The sponge-dwelling shrimp Synalpheus regalis lives in colonies that may have >300 individuals, but that contain only one reproductive female. Direct… 

Kin structure, ecology and the evolution of social organization in shrimp: a comparative analysis

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Why are There No Eusocial Fishes?

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It is shown that workers in Synalpheus elizabethae are reproductively totipotent and that female—but not male—gonadal development and mating are mediated by the presence of a queen, apparently without physical aggression.

Allometry of individual reproduction and defense in eusocial colonies: A comparative approach to trade-offs in social sponge-dwelling Synalpheus shrimps

These results suggest that in less cooperative species, intra-colony conflict selects for queen retention of weapons that have significant costs to fecundity, while reproducing females from highly eusocial species, i.e., those with a single queen, have been able to reduce the cost of weapons as a result of protection by other colony members.

Crustacean Social Evolution

Evolutionary transitions towards eusociality in snapping shrimps

‘family-centred’ origin of eusociality parallels observations in insects and vertebrates, reinforcing the role of kin selection in the evolution of eUSociality and suggesting a general model of animal social evolution.

Colony defense and behavioral differentiation in the eusocial shrimp Synalpheus regalis

Sampling of unmanipulated field colonies showed that colony reproductive output increased linearly, by a factor of 177 times, throughout the range in sampled colony sizes, whereas average per capita reproductive output decreased by only 61% over the same range, suggesting that non-breeding colony members may gain inclusive fitness benefits by remaining in and helping defend the natal sponge.

Influence of sociality on allometric growth and morphological differentiation in sponge-dwelling alpheid shrimp

Shrimp are similar to other eusocial animals in the morphological differentiation between breeders and nonbreeders, and in the indication that some larger nonbreingers might contribute more to defence than others.

Social transitions in sponge-dwelling snapping shrimp.




Why Are There No Reports of Eusocial Marine Crustaceans

The goal is to point out the possibility of the presence of eusocial marine forms, and to urge marine biologists to look for them.

Mammalian eusociality: a family affair.

Eusociality in Australian gall thrips

The presence of eusociality is reported in a second haplodiploid insect taxon, the order Thysanoptera, which provides remarkable new opportunities for analysing the causes of the evolution of eUSociality.

Evolution of Sociality in Insects

It is the view that a whole series of factors acting jointly or alternately is responsible for the numerous origins of sociality in Hymenoptera, compared to only one in all the other insects.

Host use patterns and demography in a guild of tropical sponge-dwelling shrimps

Demographic consequences of the commensal lifestyle for shrimps Synalpheus spp. were assessed by sampling sponges and coral rubble on reefs in Caribbean Panama. Eight of 22 species were found solely

The Biology of the Naked Mole-Rat

An international group of researchers covers such topics as the evolution of eusociality, phylogeny and systematics of the rodent family Bathyergidae, population and behavioral ecology and genetics of naked mole-rats in the field, vocal and nonvocal behaviors, social organization and divisions of labor within colonies, and climatic, social, and physiological factors affecting growth, reproduction, and reproductive suppression.

Comparative Social Behavior of Bees

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Population Dynamics of the Sponge-Dwelling Alpheid Synalpheus Longicarpus, with Observations on S. Brooksi and S. Pectiniger, in Shallow-Water Assemblages of the Eastern Gulf of Mexico

Investigations were conducted on species composition, population dynamics, and ecological interactions of alpheid shrimps associated with the loggerhead sponge Spheciospongia vesparia in

Commentary: Extrinsic versus Intrinsic Factors in the Evolution of Insect Sociality

Over the past few years, there has been a veritable flood of speculation regarding the evolution of social behavior, especially in Hymenoptera. A partial list of papers might include Lin and Michener

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Laboratory observations on a field-collected colony of 40 Heterocephalus have shown that only a single female breeds, which together with long life-spans, overlap of generations, cooperative brood care, and possible age polyethism provide parallels with the eusocial insects.