Colony defense and behavioral differentiation in the eusocial shrimp Synalpheus regalis

By Emmett J. Duffy, C. Morrison, K. Macdonald. Behavioral Ecology and Sociobiology, 2002

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Evolutionary ecology of social and sexual systems : crustaceans as model organisms (2007, result): “In contrast to spiny lobsters, data on the sponge-dwelling Synalpheus snapping shrimps suggest that sociality has arisen multiple times in highly specialized niches where dispersal is greatly reduced and colony defense is paramount to reproductive success (Duffy et al. 2000, 2002).”
Sociality in New World hystricognath rodents is linked to predators and burrow digging (2006, background): “…vigilance and predator detection (e.g., Ebensperger and Wallem, 2002; Hoogland, 1981; Kenward, 1978; Uetz et al., 2002), dilute their per capita risk (e.g., Krause and Godin, 1995; Watt and Chapman, 1998; Watt et al., 1997), or improve chances of collective defense (e.g., Duffy et al., 2002).”
Emergence of division of labour in halictine bees: contributions of social interactions and behavioural variance (2005, background): “…differentiation has been documented across a wide range of social taxa and in numerous contexts, including shrimps during colony defence (Duffy et al. 2002), rats during foraging (Grasmuck & Desor 2002), lions during cooperative hunting (Stander 1992) and human couples during parenting…”
The ecology and evolution of eusociality in sponge-dwelling shrimp (2002, methodology): “regalis provide evidence for discrimination between nestmates and other conspecifics, and even more pronounced aggression toward heterospecific intruders (Duffy et al., 2002).”