ESpI - Food Preference of Tripneustes gratilla A...

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Food Preference of Tripneustes gratilla : A Meta-Analysis A Special Problem Proposal Group Members: Camille Quiambao Felecitas Mangabat Mark June Consigna Cherish June Galamay
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Introduction Echinoderms are animals inhabiting marine habitats. They are usually found in tropical zone. They posses internal water vascular system, radial symmetry and internal skeleton. Echinoderms have five classes namely : Asteroidea ( starfish ), Ophiuroidea ( brittle stars ), Echinoidea ( sea urchins and sand dollars ), Holothuroidea ( sea cucumbers and Crinoidea ( feather star)). Echinoderms provide a key ecological role in ecosystems. They are regarded as a delicacy; sea urchins are captured each year, the gonads of which are consumed. Sea urchins are small, spiny, globular animals. They are typically found in coral reefs and seagrasses. Sea urchins are primarily herbivores or detritus feeders; they mainly feed on algae and seagrasses. Tripneustes gratilla are relatively abundant in seagrass and reef. They are cultured for food consumption. Grow-out culture in sea cages and restocking were undertaken to help rebuild the spawning population of Tripneustes gratilla in Bolinao, Philippines ( Meñez et al. 2008 ). Food selectivity might play an important role in this structuration ( de Loma et al. 2002 ). Sea urchin does show preferences when offered a selection of macroalgal species, which it encounters in nature. Preferences among macroalgae were evident in field-collected urchins exposed to pair-wise tests where the variable was either the consumption rate of the algae or observation of which algal species the urchins chose to touch with their lantern teeth ( Stimson et al. 2007 ). Meta-analysis combines the results of several studies that address a set of related research hypotheses. This aims the derivation and statistical testing of overall factors and generalization to the population of studies. Significance of the Study The result of the meta- analysis will determine the gut composition of Tripneustes gratilla which can be utilized as bench mark data on the feeding preferences of sea urchin. This will be of used for future culture of sea urchin in captivity through establishment of hatcheries that will serve as answer to food security, improve livelihood and lessen poverty through job generation. Objectives of the Study
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The study gears to attain the following objectives: (1)to come up with a conclusion based upon the collected secondary data and validate results in a broader population (2) to compare the different studies regarding on food preferences of sea urchin. Review of Literature Biology Echinoids are able to feed on almost everything that can be found in the field (De Ridder and Lawrence, 1982). However, the dominant regular echinoids on coral reefs are essentially herbivorous, eating seagrasses and algae (Lawrence, 1975; De Ridder and Lawrence, 1982). Availability of food types and habitat types might determine sea urchin diet (Dix, 1970; Vadas, 1977; Ayling, 1978), but sea-urchins
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This note was uploaded on 01/18/2010 for the course ECO zoo142 taught by Professor Prof.dechavez during the Spring '09 term at UNI.

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ESpI - Food Preference of Tripneustes gratilla A...

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