Macrobrachium amazonicum (Heller, ). AphiaID. (urn:lsid: :taxname). Classification. Biota; Animalia. Pupil of a Macrobrachium amazonicum (freshwater shrimp). Alex H. Griman. Affiliation: Alex Kawazaki Photography São Paulo, Brazil. Technique. Macrobrachium amazonicum — Overview. Amazon River Media. Image of Macrobrachium amazonicum. Macrobrachium amazonicum Unreviewed.

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The mean angle and standard deviation were then calculated for each group. Maria Lucia Negreiros Fransozo and the anonymous reviewer for their extremely constructive comments on an earlier version of this manuscript; and to Dr.

This type of mating behavior was also observed in the Pantanal shrimps by Hayd and Anger Four samples of 30 macrkbrachium were taken monthly, using a trap, from January to April Our results indicated that the natural male population of M.

Knowledge of the life history of the different populations of the species remains fragmentary Anger et al. The results of the K-means classification were refined by applying a discriminant analysis. These morphotypes differ in cheliped morphology and in certain morphometric relationships.

Fecundity and fertility of Macrobrachium amazonicum (Crustacea, Palaemonidae).

This study recorded for the first time, the occurrence of all four male morphotypes of M. So the difference in size of prawns could be greater. Revue d’Hydrobiologie Tropicale, vol.

Results Carapace length ranged from 4. How to cite this article. This oversupply of food also ends up attracting prawns, which are usually used as bait, especially to catch silver croaker Plagioscion squamosissimus Heckel, Comparison of macrovrachium pattern until sexual maturity between the estuarine and upper freshwater populations of the prawn Macrobrachium nipponense de Haan within a river.


March 19, ; Accepted: Journal of Crustacean Biology, vol. In this work, the maximum number of larvae observed per hatching for females kept in laboratory was 2, CL by the K-means clustering analysis. Reproductive and morphometric traits of Macrobrachium amazonicum Decapoda: La peche crevettiere de Macrobrachium amazonicum Palaemonidae dansleBas-Tocantins apreslafermeturedubarrage de Tucurui Bresil.

Consequently, we could determine which of these initial variables has more influence on the differentiation of possible morphological categories morphotypes.

Our results supported the hypothesis that coastal and continental populations of M. Because of this, there is some discussion about the taxonomic status of coastal and continental populations Moraes-Valenti and Valenti, These traits suggest a heterochronic shift predisplacement of sexual maturation and r-selection. From these results we can deduced that fecundity and fertility of M.

On the biology, origin, and radiation of freshwater-invading shrimp. First record of Macrobrachium amazonicum Decapoda, Palaemonidae in Argentina. Population structure of pond-raised Macrobrachium amazonicum with different stocking and harvesting strategies. Prawns of GC2 morphotype presented a CL ranging from It was reported that freshwater individuals differ from estuarine individuals in a few essential reproductive characteristics.

Nevertheless, these authors mentioned that GC2 morphotypes were not captured by them because of the trap used casting net. The palaemonid shrimp Macrobrachium amazonicum shows an unusually large geographic range ca.

Macrobrachium amazonicum

The number of captured prawns was large in the months whose level of water was low; the inverse was observed in the months that the river was with a high volume of water. On the other hand, even if GC1 and GC2 have identical gonads and very similar body size, the differences in weight and size of chelipeds can be reflected in their different roles in the environment, which would characterize them as distinct castes.


macrorachium Morphotypic differentiation of male Malaysian giantprawns, Macrobrachium rosenbergii. Similarly, these two morphotypes presented similar body sizes in the present study, what was also demonstrated by Moraes-Riodades and Valenti According to Ramos et al.

WoRMS – World Register of Marine Species – Macrobrachium amazonicum (Heller, )

It is therefore necessary to perform complementary studies focusing on other types of environments, which will certainly improve the understanding of the wide morphological and reproductive plasticity existing among populations of continental and coastal waters.

Brownish coloring was predominant in chelipeds. While shrimps from estuarine and Amazonian habitats have been studied in great detail, very little is known about hololimnetic inland populations. As a consequence, males do not need to grow to a large size nor to develop large macroobrachium weapons that would aid macrobrachiu, in battling other males for females. In TC prawns, the chelipeds are translucent, whereas in CC they are generally cinnamon-colored.