BEST THESIS
Transcript: Taxonomic Survey of Class Asteroidea in Intertidal Zone of Potipot Island, Candelaria, Zambales METHODOLOGY Mrs. Zenaida Salazar Asteroidea A (Abactinal surface) B ( Actinal surface) C (Scale :0.132 cm) Culcita novaguineae (Muller and troschel, 1842) A (Abactinal surface) B ( Actinal surface) C (Scale :0.15 cm) 1. marginal plates conspicuous; with bivalve shaped pedicellariae 2. spines present in marginal plates.................... Heppasteria philippinensis 2. spines absent in marginal plates 3. spinelets on inframarginal plates are present......... Archaster typicus 3. spinelets on inframaginals plates are absent 4. body shape pentagonal................................ Culcita novaguineae 4. body shape star-like 5. tubercles are prominent........................ Nardoa tuberculata 5. tubercles are inconspicuous 6. madreporite shape ovate................ Protoreaster nodosus 6. madreporite shape pentagon 7. shape of rays are triangular.......... Pentaster obtusatus 7. shape of rays are cylindrical 8. ambulacral plate color blue..... Linckia laevegata 8. ambulacral plate color orange... Linckia guildingi *(•) indicates that species occur in that station Pentaster obtusatus (Bory De St. Vincent 1827) They are commonly live at over or under rocky, sandy, grassy and muddy substrate. Some are attached in coral reefs. Recomendation Key to species of Class Asteroidea in Potipot Island, Candelaria Zambales National Museum A (Abactinal surface) B (Actinal surface) C (Scale: 1.38 cm.) A (Abactinal surface) B ( Actinal surface) C (Scale : 0.355cm) The sea stars that were surveyed in the intertidal zone of Potipot Island consist of (8) species, (7) generas, (4) families and all collected species belonged to Order Valvatida. Magnesium sulfate Taxonomic distribution of collected specimen Order : Valvatida Family : Archasteridae Genus : Archaster Species : typicus Intertidal zone of Potipot Island, Candelaria, Zambales, Philippines During day time at low tide level Five (5) representative individual per species Occurence of all species under Class Asteroidea Classified, Identified and Verified Dichotomous key was constructed based on morphological characteristic only There are no available data of Class Asteroidea Significance of the study to increase the amount of data available on the species of Class Asteroidea in the Philippines it could give information about the asteroidean present in Potipot Island wherein there is no report of study at this area it can inform the people of the area about the value of the species Department of Biology, College of Science, PUP research in marine biology and taxonomy of class asteroidea Crinoidea Ophiordea Echinoidea Holuthoroidea Archaster typicus (Muller and troschel 1840) Conclusion Summary Relaxation and fixation Order: Valvatida Family: Oreasteridae Genus: Protoreaster Species: nodosus In conducting this study, the following were recommended: - The sampling must also be done in night time wherein some sea stars are nocturnal. - The collection of sea stars must be observed not only in the intertidal zone but in the deepest part of water. - Water quality analysis should be done to be able to determine the parameters. - The collected species must be kept away from direct sunlight so that the natural color of species will be maintained. (cc) photo by Metro Centric on Flickr Order : Valvatida Family: Oreasteridae Genus: Culcita Species: novaguineae Distribution of Class Asteroidea General objective: This taxanomic survey of Class Asteroidea was done in the intertidal zone of Potipot Island, Candelaria, Zambales, Philippines They are predators They are detritivores. They can be voracious predators. They are important members of many marine benthic communities. Collection of the Specimen Hippasteria philippinensis (Domantay and Roxas, 1938) INTRODUCTION Sea stars or star fishes Approximately 1,600 extant species There were 71 species are described in the Philippines. Order: Valvatida Family: Oreasteridae Genus: Pentaster Species: obtusatus Potipot Island Eight (8) species were collected that belonged in one (1) order (Valvatida), Four (4) families (Archasteridae, Goneasteridae, Ophidiasteridae and Oreasteridae) and Seven (7) genera (Archaster, Hippasteria, Nardoa, Linckia, Protoreaster, Pentaster and Culcita). Each speicies were identified and describe each morphological character to conduct a taxonomic key to make easy to be familiar with the characteristics of each asteroidean from order to species level. Linckia guildingi (Gray, 1840) Protoreaster nodosus (Linneaus, 1758) Phylum Echinodermata Results Summary Linckia laevegata (Lutken, 1871) Order: Valvatida Family: Goniasteridae Genus: Hippasteria Species: philippinensis Classification of Sea stars Verification A (Abactinal surface) B ( Actinal surface) C (Scale :0.137 cm) OBJECTIVES OF THE STUDY 1. collect, classify and identify the specimens that were surveyed along intertidal zone of the study area; 2. preserve the collected