Fish choose appropriately when and with whom to collaborate

Area of Science:

• Behavioral Ecology
• Evolutionary Biology
• Comparative Psychology

Background:

• Collaborative abilities are fundamental to human society and their evolutionary roots are a key area of research.
• Chimpanzees are the only non-human species known to possess partner-choice abilities in collaboration, thought to be inherited from a common ancestor.
• Investigating collaborative behaviors in other species can illuminate the evolutionary pathways of these complex social skills.

Discussion:

• This study demonstrates that coral trout (Plectropomus leopardus) possess sophisticated partner-choice abilities during collaborative hunting with moray eels.
• Experiments analogous to those used with chimpanzees revealed that trout can assess when collaboration is necessary and select effective partners.
• The findings challenge the notion that complex collaborative decision-making is exclusive to apes, suggesting ecological factors play a significant role.

Key Insights:

• Coral trout exhibit advanced partner-choice skills in collaborative hunting, comparable to those observed in chimpanzees.
• Trout can discern the need for collaboration and learn to associate with more effective moray eel partners.
• These abilities appear to be linked to ecological demands rather than solely to brain size or phylogenetic relatedness to humans.

Outlook:

• Further research into fish social cognition can reveal convergent evolution of complex behaviors.
• Understanding the ecological drivers of cooperation can provide insights into the evolution of sociality across diverse taxa.
• This study opens new avenues for exploring the ecological and evolutionary basis of collaborative decision-making in the animal kingdom.