Morphological Study of Pennahia anea and Pennahia pawak, from Sarawak

Robena Ravena, Ramba (2022) Morphological Study of Pennahia anea and Pennahia pawak, from Sarawak. [Final Year Project Report] (Unpublished)

PDF (Please get the password by email to repository@unimas.my , or call ext: 082-583914/3973/3933) Robena Ravena (ft).pdf Restricted to Registered users only Download (476kB)

Abstract

Currently, species are recognised using morphometrics, meristic features, and swim bladder structure, however there is a between species and trait heterogeneity makes differentiation more difficult. Furthermore, there is no proper fish identification of fish stock in Sarawak. In view of this, present investigation was aimed to determine the morphology and study the morphometric and meristic characteristics of Pennahia anea and Pennahia pawak differentiation found in Sarawak. The two species of genus Pennahia, the Pennahia anea and Pennahia pawak was conducted based on fresh specimens bought from the local wet market. A total of 20 samples were used in this study, ten each for Pennahia anea and Pennahia pawak. Twenty-three morphometric and nine meristic characters. In this study, T-test, Microsoft Excel (MS Excel) for Microsoft 365 MSO (Version 2204) software, and IBM SPSS Statistics Version 28 were done to determine the statistical significance of individual morphometric characters and meristic parameters between the two species. Only seventeen significant morphometric character (p<0.05) were considered for further analyses. Pennahia pawak (180.0-222.0) have longer total length than Pennahia anea (170.0-185.0). Dorsal fin height of Pennahia anea (10.0-12.0) is shorter than Pennahia pawak (13.0-21.6). Pennahia anea (13.0-15.0) have shorter anal fin height than Pennahia pawak (15.0-24.0). The swimbladder for Pennahia anea in carrot-shaped, with 17 to 22 pairs of fan-like appendages along its sides, the first not entering head, Pennahia pawak in carrot-shapped swimbladder with 24 to 27 pairs of fan-like appendages along its sides, none entering head. Teeth pattern for both Pennahia anea and Pennahia pawak are differentiated into large and small in both jaws, but none canine-like; the large ones widely spaced, forming outer series in upper jaw, inner series in lower jaw. Pennahia anea having large, terminal and oblique mouth with upper jaw extending backward below hind margin of eye, Pennahia pawak mouth large, slightly oblique with upper jaw extending backward below middle of eye. The species were able to be recognised using morphometrics measurement, meristic counts, and swim bladder structure. Therefore, it is recommended this study must be performed on other Pennahia species as to provide proper fish identification of fish stock in Sarawak.

Actions (For repository members only: login required)

View Item