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首页> 外文期刊>ICES Journal of Marine Science >Aggressive behaviour of spotted spiny lobsters (Panulirus guttatus) in different social contexts: the influence of sex, size, and missing limbs
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Aggressive behaviour of spotted spiny lobsters (Panulirus guttatus) in different social contexts: the influence of sex, size, and missing limbs

机译：斑棘龙虾（Panulirus guttatus）在不同社会环境中的攻击行为：性别，大小和四肢缺失的影响

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Panulirus guttatus is a sedentary spiny lobster that exhibits cryptic behaviour and a low degree of gregariousness. Because these lobsters are obligate coral reef-dwellers and avoid sandy expanses, they are potentially distributed in relatively small, discrete populations with variable social contexts, which can strongly influence the expression of aggression. The present study examined the relative importance of sex, size, and the number of missing limbs in the shelter-related aggressive behaviour of replicated groups of four lobsters that differed in social context (i.e. same-sex and mixed-sex groups). Each group was held in a seawater tank with a single artificial cave-like shelter. The interior of the cave was video-recorded for 72 h and the number of aggressions performed by each individual was quantified in a 10-min segment of video per hour. Most aggressions were related to occupancy of the shelter inner space and tended to end when individuals were sufficiently spaced out. In general, per-capita rates of aggression were higher at night and size was an important predictor of aggressiveness among individuals of the same sex. Males were substantially more aggressive than females, but the number of missing limbs significantly impacted the degree of aggressiveness in males. In mixed-sex groups, fewer aggressions occurred when the largest individual was a male than when it was a female, suggesting that it may take longer for smaller males to assert themselves. Our results provide insights into some potential consequences of increase in fishing pressure and loss of habitat complexity in Caribbean reefs for the social behaviour and population dynamics of these lobsters.
机译：Panulirus guttatus是一种久坐的多刺龙虾，表现出隐秘的行为和低度的群居性。因为这些龙虾是珊瑚礁居民，避免沙质扩张，所以它们有可能散布在相对较小，离散的人群中，这些人群具有不同的社会背景，这可能会极大地影响侵略的表达。本研究调查了性别，大小和四肢缺失的相对重要性，这是在社会背景不同的四个龙虾复制群体（即同性和混合性别群体）的避难所相关攻击行为中产生的。每个小组被关在一个带有单个人工洞穴状掩体的海水缸中。对该洞穴的内部进行了72小时的视频记录，并以每小时10分钟的视频片段量化了每个人的攻击次数。大多数侵略行为与庇护所内部空间的占用有关，并且在个体之间有足够的空间时往往会终止。通常，夜间人均攻击率较高，体型是同性个体攻击性的重要预测指标。男性比女性更具侵略性，但四肢缺失的数量显着影响了男性的侵略程度。在混合性别群体中，最大的男性是男性，而女性则较少，这表明较小的男性可能需要更长的时间才能表现自己。我们的研究结果提供了洞察力，揭示了捕鱼压力增加和加勒比海珊瑚礁栖息地复杂性丧失对这些龙虾的社会行为和种群动态的潜在影响。

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