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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IUCN Red List of Threatened Species

Male population structure of the Amazon River prawn Macrobrachium amazonicum in a natural environment. In summary, our data show biologically relevant differences in life-history traits of shrimps from the Pantanal compared to M. Morphotypes in male Amazon River Prawns, Macrobrachium amazonicum. The moulting cycle of larval Amazon River prawn Macrobrachium amazonicum reared in the laboratory.

Macrobrachium amazonicum

June 5, ; Revised: After the hatching, the larvae were siphoned and counted. Towards sustainable freshwater prawn aquaculture — lessons from shrimp farming, with special reference to India.

Brownish coloring was predominant in chelipeds. In Brazil, the amazonjcum is intensively exploited by artisanal fisheries; it is also consumed as human food, most commonly in Northeastern Brazil and in the Amazon maacrobrachium, by all social classes Moraes-Valenti and Valenti, ; Marques and Moraes-Valenti, After the identification of the morphotypes by the K-means clustering analysis, a linear regression analysis was conducted using the data from the juveniles and from each morphotype.

This may be due in part to a 2. The propodus size PPL was the variable that had the highest contribution to PC1, indicating that this structure could be used to separate males in different morphotypes.


Allan Hancock Foundations Publications. The following dimensions were measured with a digital caliper 0. Culture of the Amazon River Prawn Macrobrachium amazonicum. 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. These morphotypes differ in cheliped morphology and in certain morphometric relationships.

With respect to average fecundity F by length classes, the lowest and highest number of eggs observed was and 1, respectively.

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

The male population of the lake of Ibitinga and from Pantanal presented mean sizes and number of morphotypes lower than the population studied here. March 19, ; Accepted: Nevertheless, these authors mentioned that GC2 morphotypes were not captured by them because of the trap used casting net.

There is strong human disturbance here, caused by an excessive external supply of nutrients, such as fish food pelletsviscera of caught fish and corn, to attract fish for sport fishing.

Population structure of pond-raised Macrobrachium amazonicum with different stocking and harvesting strategies. Quatro amostras de 30 minutos foram realizadas mensalmente, utilizando armadilhas, de janeiro a abril de Carapace length ranged from 4. According to the allometric coefficients obtained in the morphometric analysis, morphotypes CC, GC1 and GC2 have very similar body size relationships between carapace and propodus Figure amazoncum and Table 3.


On the biology, origin, and radiation of freshwater-invading shrimp.

Morphologic and morphometric analysis confirmed the division of male Macrobrachium amazonicum into distinct groups. Figure 4 shows a specimen from each group, demonstrating differences in the cheliped size and the spination pattern.

Knowledge of the life history of the different populations of the species remains fragmentary Anger et al. Biology Ocurrence of male morphotypes of Macrobrachium amazonicum Caridea, Palaemonidae in a population with an entirely freshwater life cycle.

In total, shrimps were examined males; females, of these ovigerous. A rapid assessment of the decapod fauna in the Rio Tahuamanu and Rio Manuripi Basins, with new records of shrimps and crabs for Bolivia Crustacea, Decapoda, Palaemonidae, Sergestidae, Trichodactylidae.

As for fecundity by weight classes, the lowest number of eggs observed was and the highest, 1, Prawns of the CC morphotype had a CL of Amaaonicum and Conservation, vol. How to cite this article. Each group presents a specific growth pattern on body relationships, demonstrated by the differences in the allometric growth constant.