Abstract
Morphology character is the result of interaction between genetic and environmental factor, and the last factor is the dominant factor of variation. Morphometric character of shrimp is required to determine the value of portion of body part that can be consumed, so that it can be used as baseline in designing breeding program. This research aimed to study the variation of morphometric and meristic of Macrobrachium lar population from several rivers i.e. Andai, Wariori, Muara Prafi and Pami, in Manokwari West Papua Province. We found eight morphometric characters which were significanly different (p<0.01) among lar shrimp populations. Among the eight characters, there were three best morphometric characters, body weight (BT), total length (PT), and rostrum length (PR) that could be used for determining the differences between populations. Total number of upper teeth rostrum ranged between 7-9, while lower teeth ranged between 0-5. The meristic characters between populations were not significanlly different (p>0.05). Morphometric characters of Andai and Pami population tended to similar each other as well as those of Wariori and Muara Prafi population. It showed that the similarity of the characters might related to close distance of the rivers. Although the four those rivers came from different upstream source, the closer distance of the M. lar population, the closer genetic relationship of M. lar population.
Highlights
Indonesia has various species of freshwater shrimp which are potential to be develop
The result showed that eight character morphometric of M. lar interpopulation were significantly different (p
M. lar in Manokwari rivers varied in morphometric characters
Summary
Indonesia has various species of freshwater shrimp which are potential to be develop. Macrobrachium lar (Palaemonidae family), or commonly known as monkey river prawn, is freshwater shrimp which spread naturally in Indonesia including Papua region. This shrimp have lage size (adult shrimp > 140 mm), fast growth relativelly, and good taste (Lal et al 2014). Macrobrachium lar is commonly sold by local people in Manokwari at traditional market. The continuous chatching will result the decline of this shrimp population in nature (Nandlal 2005; Fauzi 2013). Conservation efforts need to be undertaken by first examining the aspects relating to these shrimp
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