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首页> 外文期刊>Polar biology >Update of the population size and breeding performance of gentoo penguins (Pygoscelis papua) at Stranger Point/Cabo Funes, South Shetland Islands
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Update of the population size and breeding performance of gentoo penguins (Pygoscelis papua) at Stranger Point/Cabo Funes, South Shetland Islands

机译：南设得兰群岛的陌生人角/卡波菲内斯的龙企鹅（Pygoscelis papua）的种群数量和繁殖性能的更新

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摘要

The plasticity in the trophic ecology, the breeding phenology, and the low nesting site fidelity would be the reasons why most of the gentoo penguin (Pygoscelis papua) populations breeding in the western Antarctic Peninsula and islands of Scotia Arc remained stable or increasing, despite the changing environmental conditions. Regardless of the overall trend, recent studies revealed a decline in the abundance of some gentoo penguin populations at those regions. Therefore, it is highly valuable to update the population size of each colony in order to confirm the current trends of individual colonies and generate a comprehensive overview of the population status. We report the abundance and breeding performance of gentoo penguins at the Stranger Point/Cabo Funes colony from 2000/2001 to 2018/2019. During the last season, 5383 breeding pairs and 5545 chicks in creche were counted. Despite there were considerable inter-annual fluctuations over the study period, the total number of gentoo penguin breeding pairs increased by 74.6% (+ 3.1% per annum), while the number of chicks creched increased by 60.0% (+ 2.6% per annum). However, the index of breeding success remained relatively constant over time, varying between 0.74 and 1.23 chicks in creche/breeding pairs. Gentoo penguins have life-history strategies that are advantageous to face the environmental variability, allowing the species to maintain their breeding performance stable over time and enhance their resilience, which can favour the population growth at Stranger Point.
机译：在营养生态学，繁殖物候学和低巢位保真度方面的可塑性，是尽管在南极半岛西部和Scotia Arc岛上繁殖的大多数金戈企鹅（Pygoscelis papua）种群保持稳定或增加的原因。不断变化的环境条件。无论总体趋势如何，最近的研究表明，这些地区的一些金企鹅企鹅种群的数量减少了。因此，更新每个菌落的种群规模以确认单个菌落的当前趋势并生成种群状况的全面概览非常有价值。我们报告了2000/2001年至2018/2019年间在陌生人角/卡波富内斯殖民地的金企鹅的丰富度和繁殖表现。在上个季节，计数了5383对繁殖对和5545头小鸡。尽管在研究期间年际波动很大，但金entoo企鹅繁殖对的总数增加了74.6％（每年+ 3.1％），而幼仔的数量增加了60.0％（每年+ 2.6％） 。但是，育种成功指数随时间保持相对恒定，在托儿/育种对中，雏鸡的比率在0.74至1.23之间。 Gentoo企鹅具有有利于应对环境变化的生活史策略，可使该物种随着时间的推移保持其繁殖性能稳定并增强其适应能力，从而有利于Stranger Point的种群增长。

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  • 来源
    《Polar biology》 |2020年第2期|123-129|共7页
  • 作者

    Juares Mariana A.; Casaux Ricardo; Negrete Javier; Rios Ayelen; Castillo Martin; Coria Nestor R.; Santos Mercedes M.;

  • 作者单位

    Inst Antartico Argentino Dept Biol Predadores Tope 25 Mayo 1143 B1650CSP Buenos Aires DF Argentina|Consejo Nacl Invest Cient & Tecn Godoy Cruz 2290 C1425FQB Buenos Aires DF Argentina|Univ Nacl La Plata Lab Anexos Fac Ciencias Nat & Museo Calle 64 3 B1904AMA Buenos Aires DF Argentina|UNLP CONICET Fac Ciencias Nat & Museo Inst Antartico Argentino Calle 64 3 B1904AMA Buenos Aires DF Argentina;

    Inst Antartico Argentino Dept Biol Predadores Tope 25 Mayo 1143 B1650CSP Buenos Aires DF Argentina|UNPSJB Ctr Invest Esquel Montana & Estepa Patagon CONICET Roca 780 RA-9200 Esquel Chubut Argentina;

    Inst Antartico Argentino Dept Biol Predadores Tope 25 Mayo 1143 B1650CSP Buenos Aires DF Argentina|Univ Nacl La Plata Lab Anexos Fac Ciencias Nat & Museo Calle 64 3 B1904AMA Buenos Aires DF Argentina;

    Univ Nacl La Plata Lab Anexos Fac Ciencias Nat & Museo Calle 64 3 B1904AMA Buenos Aires DF Argentina;

    Inst Antartico Argentino Dept Biol Predadores Tope 25 Mayo 1143 B1650CSP Buenos Aires DF Argentina;

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  • 关键词

    Pygoscelis papua; Breeding pairs; Chicks creched; Long-term trends; Antarctica;

    机译：番木瓜繁殖对;小鸡蠕动;长期趋势;南极洲;

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