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首页> 外文期刊>Aquatic Biology >Size, muscle metabolic capacities and escape response behaviour in the giant scallop
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Size, muscle metabolic capacities and escape response behaviour in the giant scallop

机译：扇贝的大小，肌肉代谢能力和逃避反应行为

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ABSTRACT: Placopecten magellanicus start their lives as free-living veligers, then become byssally attached juveniles, mobile young adults and finally generally sedentary large adults. Although biomechanical considerations help explain this size dependence of swimming activity, the patterns of muscle use and the physiological capacities of the adductor muscle could change with size. Measurements of in vivo force production (in 2004) and muscle metabolic capacities (in 2008) were used to assess how P. magellanicus (Îles-de-la-Madeleine, 47°23’N, 61°52’W) of 30 to 98 mm in shell height (SH) use the adductor muscle during escape responses. Principal components analysis of escape response behaviours revealed that parameters associated with endurance and phasic contraction frequency were associated on the first 2 axes, whereas measures of force production were linked on the third axis. Individual scores from the first and third principal components showed a significant size dependence, with values first increasing and then decreasing with SH. Scallop size influenced escape response endurance, clap numbers and force production in a similar fashion. These metrics of muscle use generally peaked at SH ~70 mm. Physiological attributes, including muscle enzymatic activities and phosphoarginine content, peaked at SH ~60 mm. Although the gonadosomatic index increased with size, it did not explain the scaling of escape response behaviours or muscle metabolic capacities. Ecological considerations, particularly predation risk, may explain this allometric pattern.
机译：摘要： Placopecten magellanicus 开始以自由生活的食客的生活开始，然后成为附庸的少年，流动的年轻人，最后成为久坐的大人。尽管生物力学的考虑因素有助于解释这种游泳活动的大小依赖性，但是肌肉使用的方式和内收肌的生理能力可能随大小而变化。通过测量体内力量（2004年）和肌肉代谢能力（2008年）来评估人体的P。壳高（SH）为30至98毫米的麦哲伦（Îles-de-la-Madeleine，北纬47°23’N，北纬61°52’W）在逃跑时会使用内收肌。逃避反应行为的主成分分析表明，与耐力和相收缩频率相关的参数在前两个轴上相关，而力产生的度量在第三个轴上相关。来自第一和第三主成分的单个分数显示出显着的大小依赖性，其值随SH值先增大然后减小。扇贝的大小以类似的方式影响逃生反应的承受力，拍手数量和力量产生。这些肌肉使用指标通常在SH〜70 mm达到峰值。生理特性，包括肌肉酶活性和磷酸精氨酸含量，在SH〜60 mm达到峰值。尽管性腺机能指数随体型增加而增加，但不能解释逃避反应行为或肌肉代谢能力的尺度。生态方面的考虑，尤其是掠食风险，可以解释这种异位模式。

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