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Species Identification and Morphological Characteristics of Croakers from
Sibu
Siti Zaidatul Afifah binti Mohd Zaidon
Supervisor: Dr. Seah Ying Giat
Bachelor of Applied Science (Fisheries)
School of Fisheries and Aquaculture Sciences
This study was conducted to determine croaker species from Sibu, Sarawak waters by
its morphological characters. Fifteen (15) species were identified throughout this
study. 28 parameters from morphometric measurements and meristic counts were
used as the species data to differentiate the croakers. The data was analysed by using
PCA under Past 3 application to obtain the significance parameters for species
divergence. As a result, second anal spine length parameter denoted as PC I and first
anal ray length as PC II with 34.30% and 26.78% of variance’s shape among the
croakers respectively. However, species complex between Pennahia pawak and
Pennahia macrocephalus were found since their scatter plot overlapped each other for
overall species analysis. PCA analysis is repeated by focusing on both species to gain
significance parameters that able to distinguish the species. Result shows that
parameter second anal spine length (PC I) and pelvic fin tip to vent (PC II) is the
distinguishable character among the Pennahia.
647 | UMT UNDERGRADUATE RESEARCH DAY 2018