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Quantification of larval traits driving connectivity: the case of Corallium rubrum (L. 1758)

机译：幼虫性状的定量驱动连通性：红珊瑚菌（L. 1758）

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摘要

Larval dispersal is the process enabling connectivity between populations of marine species with a sedentary adult stage. This transportation results from the coupling between flow and larval biological traits. This experimental study aims to quantify these larval biological traits, namely pelagic larval duration (PLD), buoyancy and larval vertical motility behavior, for Corallium rubrum. Larval vertical motility behavior was split into active behavior (swimming) and passive behavior (free fall). A particle-tracking routine was applied to video recordings of the active and passive motility behavior of C. rubrum larvae to quantify their free fall speeds, swimming activity frequency and swimming speeds. The experiment was repeated under different light conditions and at different larval ages. PLD ranged from 16 days (95 % survival) to 42 days (5 % survival). Larvae exhibited negative buoyancy with a free fall speed decreasing linearly with age, at a velocity varying from -0.09 ± 0.026 cm s~(-1) on day 1 to -0.05 ± 0.026 cm s~(-1) on day 10. No significant difference was found either in the activity frequency or in the mean swim velocities during active periods for age (up to 12 days old) or under different light conditions. C. rubrum larvae maintained active swimming behavior for 82 % of the time. This activity frequency was combined with age-varying free fall periods in the motility behavior model extrapolated up to 15 days old, resulting in a mean upward speed that increased from 0.045 cm s~(-1) (day 1) to 0.056 cm s~(-1) (day 15). This larval motility behavior, combined with the extended PLD, confers on C. rubrum larvae an unsuspect-edly high dispersive potential in open waters.
机译：幼虫扩散是使成年久坐阶段的海洋物种种群之间建立连通的过程。这种运输是由于血流和幼虫生物学特性之间的耦合而产生的。这项实验研究旨在量化红珊瑚的这些幼体生物学特征，即上层幼体持续时间（PLD），浮力和幼体垂直运动行为。幼虫的垂直运动行为被分为主动行为（游泳）和被动行为（自由落体）。粒子追踪程序应用于视频记录的红毛衣藻幼虫的主动和被动运动行为，以量化其自由落体速度，游泳活动频率和游泳速度。在不同的光照条件下和不同的幼体年龄下重复该实验。 PLD范围从16天（生存​​率95％）到42天（生存率5％）。幼虫表现出负浮力，自由落体速度随年龄线性下降，从第1天的-0.09±0.026 cm s〜（-1）变化到第10天的-0.05±0.026 cm s〜（-1）。在年龄活跃期（不超过12天）或在不同光照条件下，活动频率或平均游泳速度均存在显着差异。红毛衣藻幼虫在82％的时间内保持活跃的游泳行为。在推断到15天大的运动行为模型中，此活动频率与随年龄变化的自由落体期相结合，导致平均上升速度从0.045 cm s〜（-1）（第1天）增加到0.056 cm s〜 （-1）（第15天）。这种幼虫的蠕动行为与扩展的PLD相结合，赋予了红毛衣藻幼虫在开阔水域中毫无疑问的高分散潜力。

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  • 来源
    《Marine biology》 |2015年第2期|309-318|共10页
  • 作者

    A. Martinez-Quintana; L. Bramanti; N. Viladrich; S. Rossi; K. Guizien;

  • 作者单位

    Institut de Ciencies del Mar, ICM-CSIC, Passeig Maritim de la Barceloneta, 37-49,08003 Barcelona, Spain;

    Laboratoire d'Ecogeochimie des Environnements Benthiques (LECOB), UMR8222, CNRS-Universite Pierre et Marie Curie (UPMC), Observatoire Oceanologique de Banyuls sur Mer, Avenue du Fontaule, 66650 Banyuls sur Mer, France;

    Institute of Environmental Science and Technology (ICTA), Universitat Autonoma de Barcelona (UAB), Building C Campus UAB, 08193 Bellaterra, Cerdanyola del Valles, Barcelona, Spain;

    Institute of Environmental Science and Technology (ICTA), Universitat Autonoma de Barcelona (UAB), Building C Campus UAB, 08193 Bellaterra, Cerdanyola del Valles, Barcelona, Spain,Unidad de sistemas Arrecifales, Instituto de Ciencias del Mar y Limnologia, Universidad Nacional Autonoma de Mexico, CP 77500 Cancun, Mexico;

    Laboratoire d'Ecogeochimie des Environnements Benthiques (LECOB), UMR8222, CNRS-Universite Pierre et Marie Curie (UPMC), Observatoire Oceanologique de Banyuls sur Mer, Avenue du Fontaule, 66650 Banyuls sur Mer, France;

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