Fusilier Experiment

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Lab Activity: Parallel Correlation of Caesio Cuning Digestive System Morphometrics to it’s Feeding Habit I. INTRODUCTION Fusiliers are not a fish army but they often resemble a squadron of cylindrical fishes because they school in spectacularly large numbers. They are found mostly near coral fringes or rocky shores and also places with lots of cover such as jetties, pontoons or shallow wrecks. They use their extensible upper jaws to feed on plankton in the Indo-Pacific regions. The food then passes through pharynx, into esophagus and into stomach. By the use of gastric juices, the food will undergo a partial digestion and proceeds to the intestine for further digestion and absorption. And the waste will eventually passed through the anus.…show more content…
They have been seen as big as 60 cm in length but adults typically grow to 40 cm. These species is widespread in areas of the Asia Pacific. It is related to the snapper species but they yellowtail is more slender and smaller. They school in large numbers around silt reefs predominantly at the crest of steep slopes feeding on zooplankton down to 30 meters deep. II. OBJECTIVES During this experiment students will: 1. Understand the digestion and feeding behavior of the fish. 2. Understand the definitions of anatomy. 3. Observe the external and internal anatomy of a fish. 4. Name, extract, and identify the organs that make up various systems of the fish. 5. Get the body weight, body length and body width of the fish. 6. Compute and correlate the RGL, HSI, and VSI of the fish. III. METHODOLOGY 1. First, get images of the fish and then label it. Also get the body weight, body length, and body width of the…show more content…
DISCUSSION Yellowtail Fusilier is usually found primarily around coral reefs, with a preference for coralline lagoons. They feed on zooplankton in large midwater groups. They are also caught with drive-in nets. They form schools with other caesionids. They migrate to select areas around the reef to spawn. Their maximum body length is 40.0 cm and the common length is26.6 cm for male/unsexed. Their mouth is small and terminal (Fig. 1). The protrusible mouth can be extended forward to swallow food. They have conical teeth to pierce and hold their food before swallowing (Fig.2). They use their gills’ filaments to transfer ions and water, as well as the exchange of oxygen, carbon dioxide, acids and ammonia (Fig. 3). They have a ctenoid scale that each scale is usually tucked underneath the rear portion of the preceding scale. As the fish grows, so do the scales, resulting in a pattern of concentric growth “rings” that increase in number with the scale size. (Fig. 4). They have forked caudal fin responsible for actually propelling the animal forward through the water. The shape of this fin varies with species depending mainly on its habitat (Fig. 5). The yellowtail Fusilier’s body length is 18 cm and weighs 145.81 g (Table
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