Squid exhibit personality traits inherited from their parents. However, these traits can also be influenced by environmental factors.
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Squid (Image: BBC) |
Australian researcher David Sinn from the Australian Animal Behavior Research Association has been observing the behavior of the southern dumpling squid (Euprymna tasmanica), which inhabits South Australia, Victoria, and Tasmania.
In general, these squids tend to be solitary, aloof, and exhibit carnivorous tendencies towards their neighbors, along with aggressive mating behaviors. However, within this population, Sinn has also identified some individuals that are shy and cautious, while others are bold, aggressive, and adventurous.
“For instance, when attacked, the bold ones retaliate and are ready to confront the aggressor. In contrast, the shyer individuals tend to withdraw and retreat,” Sinn stated.
Previous studies indicated that these traits in squids are about 30% heritable. However, new evidence suggests that some squids can adapt to their environment by learning to temper their boldness or shed their shyness.
Sinn remarked that both squids and other mollusks are quite intelligent. Natural evolution has compensated for their lack of shells by developing a sophisticated brain to aid in self-protection. According to him, understanding the biological and evolutionary basis of squid personalities will be key to mastering the growth of this species.
Sinn’s next project will investigate the role of personality in the sexual behaviors of squids. He posits that bold females will prefer strong males, while shy females may be less selective.
M.T
