. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 322 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS. Unfamiliar Familiar Figure 1. Average duration of all fights (±SEM). A 2-way ANOVA was performed and demonstrated a significant difference between the average duration of the fights (F-ratio = , P = .0376). The only significant difference resulted from comparing the average duration of the second fights between the familiar and unfamiliar opponent groups (F-ratio = P = .0163). a winner (fight duration) was determined by recording the time after which subordinate
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 322 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS. Unfamiliar Familiar Figure 1. Average duration of all fights (±SEM). A 2-way ANOVA was performed and demonstrated a significant difference between the average duration of the fights (F-ratio = , P = .0376). The only significant difference resulted from comparing the average duration of the second fights between the familiar and unfamiliar opponent groups (F-ratio = P = .0163). a winner (fight duration) was determined by recording the time after which subordinates failed to show any aggression above level 1. Subordinates rematched against former opponents "remem- ber" the outcome of the first match: they backed away almost immediately, thus avoiding a potentially costly second fight (Fig. 1). The subordinates in these second fights rarely earned aggression ranks above level I. When subordinates were paired against unfamiliar dominants, however, they attempted to fight their new opponents, often showing aggression levels as high as level 4. In 3 of the 10 fights between unfamiliar opponents, the previous subordinates won the match, yet no such reversals oc- curred in the fights between opponents that had encountered one another previously. Lobsters distinguish between familiar and unfamiliar oppo- nents. That first-fight subordinates attempted to challenge a new opponent implies that dominant, aggressive state alone does not maintain a hierarchy. Preliminary studies suggest that subor- dinates maintained in a chronic submissive state investigate strange, dominant opponents, but are less likely to challenge them aggressively. A continual dominant or submissive state may alter internal motivation. However, such a confined situ- ation would rarely occur naturally. Field studies have shown that although some lobsters remain in the same area, permitting repeated recognition of individuals, others are transient, allowing for encoun
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
