Microsatellite development suggests evidence of polyploidy in the social sponge-dwelling snapping shrimp Zuzalpheus brooksi.

Coordinated group response to nest intruders in social shrimp.

A key characteristic of highly social animals is collective group response to important stimuli such as invasion by enemies. The marine societies of social snapping shrimp share many convergences with terrestrial eusocial animals, including aggressive reaction to strangers, but no group actions have yet been observed in shrimp. Here we describe 'coordinated snapping', during which a sentinel sh...

Resource-associated Population Subdivision in a Symbiotic Coral-reef Shrimp.

The importance of sympatric speciation remains controversial. An empirical observation frequently offered in its support is the occurrence of sister taxa living in sympatry but using different resources. To examine the possibility of sympatric differentiation in producing such cases, I measured genetic, behavioral, and demographic differentiation between populations of the tropical sponge-dwell...

Embryo production in the sponge-dwelling snapping shrimp Synalpheus apioceros... 227 Embryo production in the sponge-dwelling snapping shrimp Synalpheus apioceros (Decapoda, Alpheidae) from Bocas del Toro, Panama

Caridean shrimps of the genus Synalpheus are abundant and widely distributed in tropical and subtropical regions, but knowledge of their reproductive biology remains scarce. We report reproductive traits of Synalpheus apioceros from Bocas del Toro, Panama, based on collections in August 2011. The 46 ovigerous females that were analyzed ranged in size from 3.8 to 7.4 mm in carapace length. Fecun...

Acoustic-based model estimation of snapping shrimp populations and the effects of a sponge die-off

Phylogenetic evidence for an ancient rapid radiation of Caribbean sponge-dwelling snapping shrimps (Synalpheus).

A common challenge in reconstructing phylogenies involves a high frequency of short internal branches, which makes basal relationships difficult to resolve. Often it is not clear whether this pattern results from insufficient or inappropriate data, versus from a rapid evolutionary radiation. The snapping shrimp genus Synalpheus, which contains in excess of 100 species and is a prominent compone...