scholarly journals Size structure and preyed corals of Acanthaster planci (crown-of-thorns sea star) in Lungui Island, Dimataling, Southern Philippines

2020 ◽  
Vol 18 (2) ◽  
Keyword(s):  
Size Structure ◽  
Sea Star ◽  
Acanthaster Planci

scholarly journals Trichodermaerin, a New Diterpenoid Lactone from the Marine Fungus Trichoderma erinaceum Associated with the Sea Star Acanthaster planci

2013 ◽  
Vol 8 (1) ◽  
pp. 1934578X1300800 ◽  
Author(s):  
Zhong-Liang Xie ◽  
Hou-Jin Li ◽  
Lai-You Wang ◽  
Wan-Ling Liang ◽  
Wei Liu ◽  
...  
Keyword(s):  
Cell Lines ◽  
Cancer Cell ◽  
Oxidation Product ◽  
Cancer Cell Lines ◽  
Marine Fungus ◽  
Culture Broth ◽  
Cytotoxic Activities ◽  
Sea Star ◽  
Acanthaster Planci ◽  
Catalyzed Oxidation

Trichodermaerin (1), a novel diterpenoid lactone, together with the known compound, harziandione (2) were isolated from the culture broth of the fungus Trichoderma erinaceum associated with the sea star Acanthaster planci. Their structures were determined by analysis of the NMR and MS data. 1 was the Baeyer-Villiger monooxygenase catalyzed oxidation product of 2. Compound 2 did not show cytotoxic activities against various cancer cell lines.

Acanthaster planci impact on coral communities at permanent transect sites on Bruneian reefs, with a regional overview and a critique on outbreak causes

2011 ◽  
Vol 92 (4) ◽  
pp. 803-809 ◽  
Author(s):  
David J.W. Lane
Keyword(s):  
Coral Cover ◽  
Food Limitation ◽  
Past Century ◽  
Live Coral ◽  
Sea Star ◽  
Acanthaster Planci ◽  
The Past ◽  
Live Coral Cover ◽  
Coral Communities ◽  
High Precipitation

The submerged coral reefs of Brunei, little-impacted by human activity and characterized by high live coral cover, have no recorded history in recent decades of the presence of the crown-of-thorns (COT), Acanthaster planci. This sea star, first recorded on Brunei reefs in 2008, attained outbreak densities in 2010. At Littledale Shoal its impact on corals at permanent transect sites has been quantified; mean live coral cover reduced by half from 2006 to 2010 due predominantly to predation. Line intersect transect data confirm a predisposition for tabular Acropora species, a prominent feature at this site, although other scleractinian taxa were also predated. Other regional outbreaks are reviewed, including episodes, and their timing, within the neighbouring Coral Triangle (CT). Mounting evidence implicates nutrient-enhanced increases in primary production as a primary cause of COT outbreaks. However, this stands in contrast with a report of global oceanic phytoplankton decline in the past century, and there is little evidence of such a link in the CT, even though this region is characterized by high precipitation, erosional plumes and seasonal upwelling-associated phytoplankton blooms. Furthermore, until survivorship and competency for a wider spectrum of mass-spawned invertebrate planktotrophs in relation to elevated phytoplankton densities is better understood, such evidence, suggesting release from food limitation as the principal cause of enhanced COT recruitment, should be interpreted with caution.

scholarly journals Acanthaster planci Outbreak: Decline in Coral Health, Coral Size Structure Modification and Consequences for Obligate Decapod Assemblages

PLoS ONE ◽  
2012 ◽  
Vol 7 (4) ◽  
pp. e35456 ◽  
Author(s):  
Matthieu Leray ◽  
Maxime Béraud ◽  
Arthur Anker ◽  
Yannick Chancerelle ◽  
Suzanne C. Mills
Keyword(s):  
Size Structure ◽  
Structure Modification ◽  
Acanthaster Planci ◽  
Coral Size ◽  
Coral Health

scholarly journals Jenis-Jenis Bintang Laut Dan Bulu Babi (Asteroidea, Echinoidea: Echinodermata) Di Perairan Pulau Cilik, Kepulauan Karimunjawa

2018 ◽  
Vol 21 (1) ◽  
pp. 41
Author(s):  
Retno Hartati ◽  
Endika Meirawati ◽  
Sri Redjeki ◽  
Ita Riniatsih ◽  
Robertus Triaji Mahendrajaya
Keyword(s):  
Sea Urchin ◽  
Sea Urchins ◽  
Habitat Type ◽  
Line Transect ◽  
Sea Star ◽  
Acanthaster Planci ◽  
Sea Stars ◽  
Transect Line ◽  
Linckia Laevigata ◽  
Diadema Setosum

Abstract Types of Star Fish and Sea Urchins (Asteroidea, Echinoidea: Echinodermata) In Cilik Island, Karimunjawa WatersEchinoderms are fundamentally good indicators of health and status of coralline communities in marine waters.  Substrat of  sandy, rububle and coral reefs are good habitat for Asteroidea dan Echinoidea.  This study aim to identify sea star (Asteroidea) and sea urchin (Echinoidea) species from Pulau Cilik waters of Karimunjawa Islands. Asteroidea and Echinoidea observed using the line transect method used, ie subjects within the same distance between the transect and the transect square with observations of 2.5 m on the right and left of transect line line. Morphology, habitat type (substrate & depth) and total number of sea stars and sea urchins at each station were determined. The results showed that Pulau Cilik has six species of Asteroidea (Sea star), ie Linckia laevigata, L. multifora, Neoferdifla ocellata (Family Ophidiasteridae), Luidia alternate (Luidiidae Family), Culcita novaeguineae (Family Oreasteridae) and Acanthaster planci which belongs to Family Acanthasteridae. There were 4 species of Echinoidea Sea urchin) found, i.e. Diadema setosum, D. antillarum, D. savignyi and Echinothrix calamaris, which all were family members of Diadematidae Keywords: Ophidiasteridae, Luidiidae, Oreasteridae, Acanthasteridae, Diadematidae AbstrakEchinodermata pada dasarnya merupakan indikator kesehatan dan status dari terumbu karang di laut. Dasar perairan yang landai dengan substrat pasir, terumbu karang dan pecahan karang yang merupakan habitat bagi hewan jenis Asteroidea dan Echinoidea. Penelitian ini bertujuan untuk mengidentifikasi henis-jenis bitang laut dan bulu babi dari perairan Pulau Cilik, Kepulauan Karimunjawa. Pengamatan Asteroidea dan Echinoidea menggunakan metoda line transect yang dimodifikasi, yaitu mengamati subjek dalam jarak yang sama sepanjang garis transect dan kuadrat transect dengan pengamatan 2,5 m di sebelah kanan dan kiri garis line transect. Morfologi, tipe habitat (substrat & kedalaman) dan jumlah total bintang laut dan bulu babi di tiap stasiun dicatat selanjutnya sampel diidentifikasi berdasarkan ciri morfologi tersebut. Hasil penelitian menunjukkan bahwa di perairan Pulau Cilik ditemukan enam spesies Asteroidea (Bintang Laut), yaitu Linckia laevigata, L. multifora, Neoferdifla ocellata (Famili Ophidiasteridae), Luidia alternate (Famili Luidiidae), Culcita novaeguineae (Famili Oreasteridae) dan Acanthaster planci yang termasuk dalam Famili Acanthasteridae. Species Echinoidea (Bulu Babi) ditemukan 4 spesies  Diadema setosum, D. antillarum, D. savignyi dan Echinothrix calamaris  semua anggota famili Diadematidae.Kata kunci : Ophidiasteridae, Luidiidae, Oreasteridae, Acanthasteridae, Diadematidae

scholarly journals Detection of a High-Density Brachiolaria-Stage Larval Population of Crown-of-Thorns Sea Star (Acanthaster planci) in Sekisei Lagoon (Okinawa, Japan)

Diversity ◽  
2016 ◽  
Vol 8 (4) ◽  
pp. 9 ◽  
Author(s):  
Go Suzuki ◽  
Nina Yasuda ◽  
Kohta Ikehara ◽  
Kouki Fukuoka ◽  
Takahiko Kameda ◽  
...  
Keyword(s):  
High Density ◽  
Sea Star ◽  
Acanthaster Planci ◽  
Larval Population

Rate of natural mortality in the sea star Archaster angulatus (Echinodermata: Asteroidea)

2017 ◽  
Vol 98 (7) ◽  
pp. 1689-1693
Author(s):  
John K. Keesing
Keyword(s):  
Size Structure ◽  
Sea Urchins ◽  
Maximum Size ◽  
Life History Strategies ◽  
Natural Mortality ◽  
Sea Star ◽  
Sea Stars ◽  
Instantaneous Rate ◽  
Peak Abundance ◽  
Size At Age

The population size structure from a total of 876 individuals, together with published values of growth rate, maximum size and size at age were used to estimate an instantaneous rate of natural mortality (M) of 0.46–0.59 year−1 in a population of the sea star Archaster angulatus from south-western Australia. Peak abundance (17%) of all animals sampled was 105–109 mm arm radius (means of 4.2–4.8 years of age) and only one per cent of sea stars are predicted to live beyond 8 years in the population studied. There are few comparable studies on sea stars but when compared with rates of natural mortality in other echinoderms (sea urchins), A. angulatus is intermediate among species which exhibit the extremes of life history strategies, that is, those which grow very rapidly and may live just two years or less and those with very slow growth rates and which may live for decades.

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