How to Wear a Sandy Coat: Secretory Cells in the Dorsal Epidermis in the Sea Cucumber Holothuria atra (Echinodermata: Holothuroidea)

2021 ◽  
Vol 38 (3) ◽  
Author(s):  
Nodoka Aruga ◽  
Euichi Hirose
Keyword(s):  
Sea Cucumber ◽  
Secretory Cells ◽  
Holothuria Atra ◽  
Dorsal Epidermis

Lipids and Free Fatty Acids of Red Sea Avrainvillea amadelpha, Holothuria atra, and Sarcocornia fruticosa Inhibit Marine Bacterial Biofilms

2020 ◽  
Vol 17 (6) ◽  
pp. 466-471
Author(s):  
Usama W. Hawas ◽  
Fekri Shaher ◽  
Mohamed Ghandourah ◽  
Lamia T. Abou El-Kassem ◽  
Sathianeson Satheesh ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Red Sea ◽  
Inhibitory Activity ◽  
Sea Cucumber ◽  
Bacterial Biofilms ◽  
Antibiofilm Activity ◽  
Bacterial Strains ◽  
Holothuria Atra ◽  
Sarcocornia Fruticosa

This study aimed at evaluating the antibiofilm activity of the Red Sea metabolites from green alga Avrainvillea amadelpha, sea cucumber Holothuria atra and costal plant Sarcocornia fruticosa against three biofilm bacterial strains isolated from Jeddah coast. Free fatty acids (FFAs) and other lipoidal matters were extracted from these organisms and analyzed by GC-MS. The composition of lipoidal fractions showed that A. amadelpha is rich by 74% saturated FAs, while sea cucumber H. atra revealed high content (60%) of unsaturated FAs. Palmitic acid is the major FA component in all species ranging from 14.5 to 26.7%. Phytol, sterols and hydrocarbons (C8-C29) were represented in the alga A. amadelpha as high contents with values 25.8, 21.9 and 18.5%, respectively. The extracts and lipoidal contents showed biofilm inhibitory activity against the isolated bacterial strains, where the unsaponified lipoidal fraction of S. fruticosa exhibited highest inhibitory activity against Planomicrobium sp. at concentration of 200 µg/mL.

scholarly journals Isolation of sea cucumbers’s (Holothuria atra) secondary metabolite using column-chromatography technique

2021 ◽  
Vol 869 (1) ◽  
pp. 012010
Author(s):  
S Agustina ◽  
S Bella ◽  
S Karina ◽  
I Irwan ◽  
M Ulfah
Keyword(s):  
Secondary Metabolites ◽  
Ethyl Acetate ◽  
Secondary Metabolite ◽  
Column Chromatography ◽  
Extraction Method ◽  
Sea Cucumber ◽  
Sea Cucumbers ◽  
Marine Chemistry ◽  
Holothuria Atra ◽  
Metabolite Content

Abstract Identification of sea cucumbers from Benteng Inong Balee, Aceh Besar and their phytochemistry screening were conducted in December 2020 to January 2021 at Laboratory of Marine Chemistry and Fisheries Biotechnology, Universitas Syiah Kuala. The purpose of this study was to identify the species of sea cucumbers and its secondary metabolite content using phytochemistry screening and column chromatography. The species of sea cucumbers that were identified was Holothuria atra. The extraction method used in sea cucumber extraction was maceration method, while the separation of secondary metabolites used column-chromatography with eluent of n-hexane : ethyl acetate (8:4). The results showed that secondary metabolites obtained from phytochemical tests were flavonoids, saponins and triterpenoids.

scholarly journals Sea cucumber community in the coastal area of the Bahoi Village,West Likupang Sub-district, North Minahasa District

2020 ◽  
Vol 8 (1) ◽  
pp. 37
Author(s):  
Andia Tri Fritama Lumbu ◽  
Lawrence J. L. Lumingas ◽  
Gaspar D. Manu
Keyword(s):  
Sea Cucumber ◽  
Diversity Index ◽  
Similarity Index ◽  
Sampling Technique ◽  
Distribution Patterns ◽  
Line Transect ◽  
Dominance Index ◽  
Holothuria Scabra ◽  
Research Site ◽  
Holothuria Atra

This research is conducted in the coastal waters of Bahoi Village, West Likupang Sub-district, North Minahasa District with the aims to know the types of sea-related environmental factors in the research site and know the community structure of the sea cucumber including the density, Index of diversity, dominance index, and distribution patterns. Data collection was done by using the line transect method, and sampling technique by using quadrat. The results of the study found 5 species of sea cucumber i.e. Holothuria atra,  Holothuria scabra,  Bohadschia marmorata, Actinopyga echinites, and  Bohadschia vitiensis. The individual density of all species is 0.12 ind/m2, and the diversity index (H ') 0.950. The value of the similarity index/compatibility obtained is e = 0.918. The result of the calculated dominance index of sea cucumber species is 1.0 and the pattern of spreading species of sea cucumber in the research site shows a random spread pattern because the value of dispersion index  (I) approaches 1 (one). Keywords: community; Sea cucumber; Bahoi; Dominance; Diversity.AbstrakPenelitian ini dilakukan di perairan pantai desa Bahoi, Kecamatan Likupang Barat, Kabupaten Minahasa Utara dengan tujuan untuk mengetahui jenis-jenis teripang yang ada di lokasi penelitian dan mengetahui struktur komunitas teripang yang meliputi kepadatan, indeks keanekaragaman, indeks dominasi, dan pola penyebaran. Pengambilan data dilakukan dengan metode line transek, dan teknik pengambilan sampel dengan mengunakan kuadrat. Hasil penelitian ditemukan 5 spesies teripang yaitu Holothuria atra, Holothuria scabra, Bohadschia marmorata, Actinopyga echinites dan Bohadschia vitiensis. Kepadatan individu dari seluruh spesies yaitu 0,12 ind/m2, indeks keanekaragaman (H’) 0,950. Nilai indeks kemerataan/keserasian diperoleh nilai indeks e = 0,918. nilai indeks dominasi spesies teripang diperoleh 1,0 dan pola penyebaran spesies teripang dilokasi penelitian menunjukkan pola sebaran acak (random) dikarenakan nilai indeks dispersi (I) mendekati 1 (satu).Kata Kunci : Komunitas; Teripang; Perairan Bahoi; Dominasi; Keanekaragaman

scholarly journals Black sea cucumber (Holothuria atra Jaeger, 1833) rescues Pseudomonas aeruginosa-infected Caenorhabditis elegans via reduction of pathogen virulence factors and enhancement of host immunity

2019 ◽  
Vol 10 (9) ◽  
pp. 5759-5767
Author(s):  
Wan-Ting Lee ◽  
Boon-Khai Tan ◽  
Su-Anne Eng ◽  
Gan Chee Yuen ◽  
Kit Lam Chan ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Virulence Factors ◽  
Black Sea ◽  
Sea Cucumber ◽  
Multidrug Resistant ◽  
Host Immunity ◽  
Bacterial Virulence ◽  
Pathogen Virulence ◽  
Multidrug Resistant Pathogens ◽  
Holothuria Atra

A strategy to circumvent the problem of multidrug resistant pathogens is the discovery of anti-infectives targeting bacterial virulence or host immunity.

scholarly journals Stichopin-containing nerves and secretory cells specific to connective tissues of the sea cucumber

2007 ◽  
Vol 274 (1623) ◽  
pp. 2279-2285 ◽  
Author(s):  
Masaki Tamori ◽  
Apurba Kumar Saha ◽  
Akira Matsuno ◽  
Sukumar Chandra Noskor ◽  
Osamu Koizumi ◽  
...  
Keyword(s):  
Sea Cucumber ◽  
Secretory Cells ◽  
Connective Tissues

scholarly journals Cytoprotective Effects of Lysophospholipids from Sea Cucumber Holothuria atra

PLoS ONE ◽  
2015 ◽  
Vol 10 (8) ◽  
pp. e0135701 ◽  
Author(s):  
Yoshifumi Nishikawa ◽  
Ayumi Furukawa ◽  
Ikumi Shiga ◽  
Yoshikage Muroi ◽  
Toshiaki Ishii ◽  
...  
Keyword(s):  
Sea Cucumber ◽  
Holothuria Atra
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