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Species Distribution, Diversity, and Abundance of Sea Cucumbers in Tropical Intertidal Zones of Aurora, Philippines

Species Distribution, Diversity, and Abundance of Sea Cucumbers in Tropical Intertidal Zones of Aurora, Philippines
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摘要 The distribution, diversity, and abundance of sea cucumbers in intertidal zones of Aurora were studied from February to June 2013 to obtain baseline data. A one-hour timed-search survey covering an approximate one kilometer over a ten-meter wide area was conducted in six coastal municipalities to obtain a comprehensive list of sea cucumber species found in the zones. Only four sampling stations (Baler, Dipaculao, Dilasag, and Dingalan) were selected for belt transect survey, 50 × 50 m, based on the availability of coralline, sandy, muddy sand, and rocky habitats which were laid perpendicular and parallel to each intertidal zone. Timed-search survey revealed a total of 15 species of sea cucumbers distributed among two Orders (Order Aspidochirotida and Order Apodida) and four Families (Family Holothuriidae, Family Stichopodidae, Family Synaptidae, and Family Chirotidae) were recorded. <em>Synapta maculata</em> is most common and has widespread distribution. Belt-tranect surveys showed <em>Holothuria leucospilota</em> is among the most frequently occurring species both during day time (58%) and night time (75%). The Dilasag sampling station had the most diverse species (0.71) while the Dipaculao sampling station had the densest species of <em>Holothuria leucospilota</em> (10,014 in<span style="white-space:nowrap;">&#8729;</span>ha<sup><span style="white-space:nowrap;">&#8722;</span>1</sup>) and abundant (95.91%) species. The distribution, diversity, and abundance of sea cucumbers in intertidal zones of Aurora were studied from February to June 2013 to obtain baseline data. A one-hour timed-search survey covering an approximate one kilometer over a ten-meter wide area was conducted in six coastal municipalities to obtain a comprehensive list of sea cucumber species found in the zones. Only four sampling stations (Baler, Dipaculao, Dilasag, and Dingalan) were selected for belt transect survey, 50 × 50 m, based on the availability of coralline, sandy, muddy sand, and rocky habitats which were laid perpendicular and parallel to each intertidal zone. Timed-search survey revealed a total of 15 species of sea cucumbers distributed among two Orders (Order Aspidochirotida and Order Apodida) and four Families (Family Holothuriidae, Family Stichopodidae, Family Synaptidae, and Family Chirotidae) were recorded. <em>Synapta maculata</em> is most common and has widespread distribution. Belt-tranect surveys showed <em>Holothuria leucospilota</em> is among the most frequently occurring species both during day time (58%) and night time (75%). The Dilasag sampling station had the most diverse species (0.71) while the Dipaculao sampling station had the densest species of <em>Holothuria leucospilota</em> (10,014 in<span style="white-space:nowrap;">&#8729;</span>ha<sup><span style="white-space:nowrap;">&#8722;</span>1</sup>) and abundant (95.91%) species.
作者 Maria Cristina B. Cañada Michelle A. Resueño Eusebio V. Angara Maria Cristina B. Cañada;Michelle A. Resueño;Eusebio V. Angara(Research and Development Services Office, Aurora State College of Technology, Baler, Aurora, Philippines)
出处 《Open Journal of Ecology》 2020年第12期768-777,共10页 生态学期刊(英文)
关键词 Sea Cucumber DISTRIBUTION DIVERSITY ABUNDANCE Intertidal Zone Sea Cucumber Distribution Diversity Abundance Intertidal Zone
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