MORPHOLOGICAL VARIABILITY OF SEVERAL INDONESIAN POPULATIONS OF GIANT FRESHWATER PRAWN, Macrobrachium rosenbergii

Abstract

Patterns in morphological variability have been the main basis for conventional genetic improvement program, particularly in selective breeding. Proper understanding on these patterns hence, is of crucial prerequisite before any scheme of breeding program is undertaken. This study was aimed to explore those morphological variations with emphasis on the assessment of among-population and among-trait variations and assessment of predictive traits that may serve for inter-population differentiation. A total 281 individuals representing four natural populations (Asahan, Ogan, Barito, and Ciasem) and one domesticated stock (GIMacro) were sampled and analyzed for variability in thirteen morphological traits. While descriptive analyses were applied to analyze both among-stock and among-trait variations, discriminant function analysis was used to search for the best traits for interpopulation differentiation. The relative variability, expressed in the coefficient of variation (CV), was used to compare the amount and patterns of morphometric variability both among traits and between stocks. Results showed that total body weight was the most variable trait while the length and meristic traits were of lower level. Discriminant analysis found that rostrum length and abdoment length to be the best morphological discriminators among intraspecific populations. However, the continuous natures of these traits make them have limited applicability for intraspecific population differentiation.

RANDOMLY AMPLIFIED POLYMORPHIC DNA (RAPD) FINGERPRINTING OF SIX INDONESIAN POPULATIONS OF GIANT FRESHWATER PRAWN, Macrobrachium rosenbergii

“…The closeness in genetic distance between the GImacro and Ogan is similar to other studied species when the similar samples were analyzed morphologically using a set of morphometric characters (Imron et al, 2008). The closest genetic distance between the two populations, apparently, could be explained by their ancestral sharing.…”

“…Due to this recency, they might resemble to their natural population counterparts. In contrast to the first five populations, the GImacro was a domesticated GFP strain maintained by the Research Institute for Freshwater Fish Breeding and Aquaculture (RIFFBA), Sukamandi for more than seven generations starting from its launching in 2001 (Imron et al, 2008). The processes of domestication and breed development through selective breeding program had been started some five years earlier.…”

Variasi Morfologis Udang Galah (Macrobrachium rosenbergii de Man, 1879) Hasil Inbreeding dan Outbreeding Populasi Probolinggo dan Mahakam

“…Penelitian mengenai variasi morfologis penting DOI: 10.22146/jtbb.29676 dilakukan sebagai dasar pemilihan bibit untuk pengembangan (Imron et al, 2008) (Khasani et al, 2010b;New, 2005;Rimalia et al, 2015) seperti ukuran karapaks yang pendek (Hadie & Hadie, 2012…”

Variasi morfologis induk udang galah (Macrobrachium rosenbergii de Man, 1879) Populasi Siratu, GIMacro, Mahakam, dan Bengawan Solo

“…Adapun induk unggul dapat diperoleh melalui perbaikan genetik (Khasani et al, 2010). Oleh karena itu dibutuhkan karakterisasi morfologis udang yang dianggap unggul untuk perbaikan genetik induk udang galah (Imron et al, 2008). Salah satu caranya adalah mengkaji karakter morfologis yang menjadi keunggulan calon induk udang galah, sehingga diharapkan dapat menghasilkan anakan yang juga unggul.…”

“…Tercatat penelitian yang telah dilakukan terkait variasi morfologis udang galah di antaranya oleh Imron et al (2008) terhadap populasi udang galah Asahan, Ogan, Barito, dan Ciasem, serta populasi GIMacro sebagai pembanding; Kisworo (2014) menentukan jarak genetik induk udang galah; Rimalia et al (2015) melakukan karakterisasi induk udang galah menggunakan karakter morfometrik pada udang Barito, Kintap dan Pagatan untuk mendapatkan induk dengan karakter unggul. Penelitian-penelitian tersebut menunjukkan adanya variasi morfologis dari setiap populasi induk udang galah yang berasal dari tempat yang berbeda-beda.…”