Assessment of Morphological Variation in Wild and Cultured Populations of Tilapia Fish (Oreochromis niloticus)

Abstract

Reliable estimates of morphometric traits are required for all traits of economic importance to predict response to selection, choose various breeding plans, estimate economic returns and to predict breeding values of stocks for selection. The present study was aimed at assessing the morphometric variation of tilapia fish (Oreochromis niloticus) from different populations. A total of two hundred samples from four populations that cut across two wild [Anantigha river (AN) and Ifiayong river (IF)] and two cultured [Unical fish farm (UN) and Domita fish farm (DM)] were used for the study with fifty samples from each population, respectively. A total of twenty morphormetric traits were measured on each fish. The data were transformed and subjected to multivariate analysis. Results obtained revealed that there were significant differences (P<0.05) in the morphometric traits of the different populations. Body weight was highest in the wild populations (AN =2.32 g; IF = 2.21 g). Correlation analysis revealed high and significant correlation coefficient between the measured traits, where the highest was observed from origin of the dorsal fin to the Original Research Article

Morphological variations and phylogenetic analysis of Oryzias nigrimas Kottelat, 1990 (Rice fish) from Lake Poso, Central Sulawesi, Indonesia

“…There are two techniques was officially used to explain the speciation process and to reconstruct the phylogenetic tree namely morphological approach and molecular approach. The morphological characteristics of fish such as body shape, color pattern and number of scales can be used as preliminary methods to distinguish the species (Ikpeme et al 2017). However, these methods are difficult and considered subjective to sever the species among the same genus.…”

Coculture of aquatic animals and paddy in brackish water: Evaluation of the growth of daily growth and morphometrics of tilapia (Oreochromis niloticus) as a fed species

“…Penting untuk disebutkan terlebih dahulu bahwa pilihan karakteristik morfometrik, meliputi panjang total (PT), panjang standar (PS), panjang badan (PB), dan tinggi badan (TB) yang diukur pada penelitian ini didasarkan pada pertimbangan bahwa keempat karakteristik ini memiliki kontribusi penting terhadap penambahan berat badan dan ikan di pasaran diberi harga berdasarkan berat (Ikpeme et al, 2017).…”

“…Beberapa penelitian terdahulu lebih banyak mengukur karakteristik morfometrik pada ikan nila hasil tangkapan. Selain itu, untuk pengukuran morfometrik ikan nila dari hasil budidaya umumnya pada ukuran-ukuran yang telah besar seperti yang dilaporkan oleh Ikpeme et al (2017), Kwikiriza et al (2023), Makeche et al (2022), dan beberapa penelitian lainnya. Variabilitas metode pemeliharaan pada beberapa penelitian terdahulu juga dapat menyebabkan bias jika dibandingkan dengan penelitian ini.…”

“…PT, PS, PB, dan TB yang diamati berkorelasi positif dan signifikan dengan berat badan ikan nila (P<0,05). Korelasi positif dan signifikan sama yang dilaporkan oleh Ikpeme et al (2017) antara PT, PS, PB, dan TB dan berat ikan nila dari hasil tangkapan dan budidaya. Implikasi dari hasil ini adalah pentingnya perhatian terhadap PT, PS, PB, dan TB untuk penambahan berat badan ikan nila pada kegiatan budidaya.…”

Phylogenetics and Molecular Divergence of Tilapia Fish (Oreochromis Species) Using Mitochondrial D-Loop and Cytochrome b Regions

“…These relationships could be studied via morphological data from a population. Although morphometric method is the simplest and the most direct way used for fish identification and characterization [8] [9], it may not be very reliable for phylogeny considering that it is more subjected to environmental influences [10] [11] [12]. To fill this gap, different marker techniques have been developed and used for fish phylogenetics.…”