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首页> 外文期刊>Ocean & coastal management >Management of crown-of-thorns sea star (Acanthaster planci L.) outbreaks: Removal success depends on reef topography and timing within the reproduction cycle
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Management of crown-of-thorns sea star (Acanthaster planci L.) outbreaks: Removal success depends on reef topography and timing within the reproduction cycle

机译：处理棘冠海星（Acanthaster planci L.）爆发：清除成功取决于礁形和繁殖周期内的时间

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摘要

Removals of crown-of-thorns sea stars (Acanthaster planci L.) are crucial initiatives in limiting the damage to coral reefs during outbreaks, but have often been unable to control the populations. We hypothesized that reef topography and exact timing of removals (before reproduction) determine their success and studied these in reefs along the western shore of Samal Island in the Philippines. An outbreak of A planci was successfully removed from an isolated reef (surrounding water column >40 m) during 42 dive hours. In August 2009, the removal rate was initially 14 specimens h~(-1), which sharply decreased to less than 4 h~(-1) after the third removal. From May 2011 onward, no specimens were observed. All sea stars were found at depths ≤18 m, which confirmed that migration to isolated reefs is very unlikely. Mean gonado-somatic index (GSI) ranged from 6 to 15 in April-May 2010 and March -April 2011. During the rest of the year, mean GSI ranged between 0 and 4. Maximum GSI of 22.0 was found for one female specimen in April 2010. Maturation occurred at a diameter of 13 cm (female) and 16 cm (male). Diameter frequency distributions showed a new cohort (7 ≤ diameter ≤ 10 cm) between November 2009 and February 2010. To accurately compare results of various studies, relationships between underwater diameter, surface diameter, and crown-of-thorns weight, were established. Removals are recommended to be performed in isolated reefs, where migration from adjacent areas is limited, and before reproduction in April (Northern hemisphere), reducing the chance of future outbreaks.
机译：去除荆棘冠冕的海星（Acanthaster planci L.）是限制暴发期间对珊瑚礁的破坏的关键举措，但往往无法控制种群。我们假设珊瑚礁的地形和清除的确切时间（繁殖前）决定了它们的成功，并在菲律宾萨马尔岛西岸的珊瑚礁中研究了它们。在42个潜水时间内，成功地从一个孤立的礁石（水柱周​​围> 40 m）中清除了一次普兰奇暴发。 2009年8月，去除率最初为14个标本h〜（-1），第三次去除后急剧下降至小于4 h〜（-1）。从2011年5月开始，没有观察到任何标本。在≤18 m的深度发现了所有海星，这证实了迁移到孤立礁石的可能性很小。在2010年4月至5月和2011年3月至2011年4月，平均性腺体细胞指数（GSI）介于6到15之间。在这一年的其余时间，平均GSI介于0到4之间。在1个雌性标本中，最大GSI为22.0。 2010年4月。成熟发生在直径为13厘米（雌性）和16厘米（雄性）的地方。直径频率分布显示了2009年11月至2010年2月之间的一个新队列（7≤直径≤10 cm）。为了准确比较各种研究的结果，建立了水下直径，表面直径和荆棘冠重之间的关系。建议在离礁区域较近的孤立礁中进行清除，并应在4月（北半球）繁殖之前进行，以减少将来爆发的可能性。

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  • 来源
    《Ocean & coastal management》 |2013年第1期|116-122|共7页
  • 作者

    Arthur R. Bos; Girley S. Gumanao; Benjamin Mueller; Marjho M.E. Saceda-Cardoza;

  • 作者单位

    Department of Marine Zoology, Netherlands Center for Biodiversity Naturalis, P.O. Box 9517, 2300 RA Leiden, The Netherlands;

    Research Office, Davao del None State College, New Visayas, 8105 Panabo, Philippines;

    Royal Netherlands Institute for Sea Research, P.O. Box 59, 1790 AB Den Burg, The Netherlands;

    Royal Netherlands Institute for Sea Research, P.O. Box 59, 1790 AB Den Burg, The Netherlands;

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