Relationship between diet composition and hepatic glycogen levels of the dash-and-dot goatfish (Parupeneus barberinus) from Tayabas Bay, Quezon, Philippines

Date

4-2014

Degree

Bachelor of Science in Biology

Major Course

Major in Zoology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Victor S. Ticzon

Abstract

The food and feeding habits of fishes change with seasons and size. In addition, the energy and survival of organisms in an ecosystem is mainly dependent on the food source that they utilize and the energy that the food provides. The diet composition and hepatic glycogen levels of Parupeneus barberinus (dash-and-dot goatfish) in Quezon province were determined and compared between two size classes: 12.0-24.0 cm and >24.0 cm. Three of 60 fish had empty stomachs and were discarded from the study. Stomach contents of each of the 57 remaining fish were identified and quantified using standard gut analysis protocol. A total of 30 fish were randomly selected (15 per size class) and prepped for routine paraffin preparation with periodic acid Schiff (PAS) as main stain without previous digestion with-amalase or malt diastase. The prepared slides were analyzed for the presence of glycogen rich areas. Construction of a Costello graph indicated that annelids were the dominant prey item for both size classes. Decapods, gastropods and bivalves were also observed to occur more in the guts of the larger fish. The results suggest that larger fish having higher hepatic glycogen levels consumed more diverse and higher trophic level prey.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2014 B4 /C35

Document Type

Thesis

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