Ontogeny and potential function of poacher armor (Actinopterygii: Agonidae)
Ontogeny and potential function of poacher armor (Actinopterygii: Agonidae)
复制标题
偷猎者盔甲的个体发育和潜在功能（Actinopterygii：Agonidae）
DOI：
10.1002/jmor.21223
复制
发表时间：
2020
影响因子：
1.5
通讯作者：
Summers, Adam P.
中科院分区：
文献类型：
--
作者：
Kruppert, Sebastian;Chu, Fabien;Stewart, Morgan C.;Schmitz, Lars;Summers, Adam P.
许多脊椎动物的整个或部分身体都有装甲。装甲可以发挥多种功能作用，包括防御、进攻、视觉显示和经验/能力信号。不同的角色意味着不同的权衡；例如，防御装甲通常会牺牲对攻击的抵抗力来换取机动性。偷猎者（Agonidae）是 47 种鲫鱼，由于其铠甲的多样性和范围，是了解铠甲进化和功能的有用系统。我们利用 21 个偷猎者属中 16 个属的 27 个物种的公开 CT 扫描数据，将盔甲与中体区域的轴向骨骼进行了比较。平均装甲密度与平均骨骼密度之比范围为0.77至1.17。从防御的角度来看，矿化总投资（体积*平均密度）更有趣。在一些小型、光滑的物种中，例如 Aspidophoroides olrikii，盔甲上的材料是内骨骼的 10 倍。在低端，一些视觉上引人注目的物种，如鲈鱼，其比例低至 2:1。我们对 34Agonopsis vulsa 身体上 8 排的所有 35 个以上板块的程度和类型（冲击与磨损）进行了分类。腹侧的行在鱼的整个长度上都显示出磨损性损伤，随着年龄的增长，这种损伤会变得更严重。随着年龄的增长，头板和尾板的冲击损坏会变得更加严重并且发生率更高。观察到的损坏率和对装甲矿化的大量投资表明，它不仅仅是为了展示，而是一种功能性的防御结构。我们不能说装甲能防御什么，但腹腔上的磨损损伤表明它们的底栖生活方式包括在基底上摩擦。冲击损害可能是由掠夺性攻击或种内战斗造成的。
Many vertebrates are armored over all or part of their body. The armor may serve several functional roles including defense, offense, visual display, and signal of experience/capability. Different roles imply different tradeoffs; for example, defensive armor usually trades resistance to attack for maneuverability. The poachers (Agonidae), 47 species of scorpaeniform fishes, are a useful system for understanding the evolution and function of armor due to their variety and extent of armoring. Using publically available CT‐scan data from 27 species in 16 of 21 genera of poachers we compared the armor to axial skeletal in the mid body region. The ratio of average armor density to average skeleton density ranged from 0.77 to 1.17. From a defensive point of view, the total investment in mineralization (volume * average density) is more interesting. There was 10 times the material invested in the armor as in the endoskeleton in some small, smooth plated species, likeAspidophoroides olrikii. At the low end, some visually arresting species likePercis japonica, had ratios as low as 2:1. We categorized the extent and type (impact vs. abrasion) in 34Agonopsis vulsaacross all 35+ plates in the eight rows along the body. The ventral rows show abrasive damage along the entire length of the fish that gets worse with age. Impact damage to head and tail plates gets more severe and occurs at higher rates with age. The observed damage rates and the large investment in mineralization of the armor suggest that it is not just for show, but is a functional defensive structure. We cannot say what the armor is defense against, but the abrasive damage on the ventrum implies their benthic lifestyle involves rubbing on the substrate. The impact damage could result from predatory attacks or from intraspecific combat.