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首页> 外文期刊>Marine ecology >Symbiosis between the holothurian Scotoplanes sp A and the lithodid crab Neolithodes diomedeae on a featureless bathyal sediment plain
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Symbiosis between the holothurian Scotoplanes sp A and the lithodid crab Neolithodes diomedeae on a featureless bathyal sediment plain

机译：在无特征的沉积沉积平原上，全人类的Scotoplanes sp A与石斑蟹蟹新石纲（Deolithodes diomedeae）之间的共生

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Vulnerability to predation may be high for many megafaunal taxa in deep-sea sedimentary habitats where physical heterogeneity is low. During ROV observations in a bathyal sediment plain off Central California, juveniles of the lithodid crab Neolithodes diomedeae were frequently observed on or under the holothurian (sea cucumber) Scotoplanes sp. A, and are hypothesized to benefit from this association as a nursery or refugium from predation. Ninety-six percent (n=574 of 599) of the juvenile N.diomedeae observed (density varied from 0.02-0.75/m(2) among sites and seasons) in the study area were associated with Scotoplanes sp. A. Of the 2596 Scotoplanes sp. A observed (density varied from 0.48 to 25.90/m(2)), 22% were attended by at least one juvenile crab, and rarely two crabs (n=4). Solitary N.diomedeae were rarely observed. This decapod-holothurian symbiosis appears to be largely commensal, with juvenile crabs (carapace width = 0.03-0.31x holothurian length) observed on or beneath Scotoplanes sp. A in a habitat with few refugia from epibenthic predators. Other hypotheses may explain or enhance the potential benefits of the association for N.diomedeae, such as elevated food availability due to the activities of Scotoplanes sp. A. The relationship may be mutualistic if there is a benefit for the holothurian, including the removal of epizoic parasites. Ultimately, the nursery or other effects on the population dynamics of N.diomedeae may be minimal in low-relief, sediment-dominated habitats, as very few sub-adult crabs were observed in the study area and were likely consumed upon outgrowing their refugia. While sedimentary habitats may be a sink for N.diomedeae populations, growth of juvenile crabs during their association with Scotoplanes sp. A should increase energy flow to its predator populations. This association has not been reported previously but may be expected in sediment-dominated habitats where these species overlap.
机译：在物理异质性较低的深海沉积生境中，许多巨型动物类群的捕食脆弱性可能很高。在ROV观测中，在加州中部附近的一个海床沉积物平原上，经常在整尾螺（海参）Scotoplanes sp。或其下观察到石蟹蟹新石纲（Deolithodes diomedeae）的幼体。 A，并且被假定可以从这种关联中受益，因为它们是作为保育所或捕食的避难所。在研究区域中观察到的百分之九十六（599的n = 574）在区域内的少年N. diomedeae（密度在0.02-0.75 / m（2）之间变化，因地点和季节而异）与Scotoplanes sp有关。答：在2596型侦察机中。观察到（密度从0.48到25.90 / m（2）不等），至少有一只幼蟹和很少有两只螃蟹（n = 4）占22％。很少观察到孤立的念珠菌。这种十足动物与共肢动物的共生关系在很大程度上是共生的，在Scotoplanes sp上或下面观察到了幼蟹（甲壳宽度= 0.03-0.31x千岁长）。栖息在一个几乎没有表皮掠食性动物栖息地的栖息地中。其他假设可能解释或增强了双歧杆菌的潜在利益，例如由于Scotoplanes sp。的活动而增加了食物的可获得性。 A.如果对哈罗法人有好处，包括消除寄生虫，这种关系可能是互惠的。最终，在低浮雕，以沉积物为主的生境中，苗圃或其他对双歧杆菌种群动态的影响可能微乎其微，因为在研究区域观察到的成年蟹很少，并且在避难所生长后很可能被消灭。虽然沉积生境可能是双翅目念珠菌种群的汇入点，但幼蟹在与Scotoplanes sp结合时的生长。 A应增加流向其捕食者种群的能量。这种关联以前没有被报道过，但是在这些物种重叠的以泥沙为主的生境中可能是预期的。

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