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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In general chelipeds were greenish and terminal segments carpus, propodus and dactyl more intensely moss green coloured.

Macrobrachium amazonicum

Morphotypic differentiation of male Malaysian giantprawns, Macrobrachium rosenbergii. However, cheliped length was always greater in GC2. According to this author, in these inland populations, female downstream migrations or a passive larval export to estuarine waters must be considered as biologically impossible, which raises the question if coastal, estuarine, and hololimnetic inland populations assigned to M.

Population structure of pond-raised Macrobrachium amazonicum with different stocking and harvesting strategies. However, this estimative is not available in the works of Santos et al.

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

Because of macrorachium, there is some discussion about the taxonomic status of coastal and continental populations Moraes-Valenti and Valenti, When reproductive and morphometric traits are compared with literature data from estuarine and inland populations living in the Amazon and Orinoco plains, shrimps from the Pantanal show conspicuous peculiarities differing from other populations: RCL ranged from They remain small, cryptic, and highly mobile Bauer, Comparison of growth pattern until sexual maturity between the estuarine and upper freshwater populations of the prawn Macrobrachium nipponense de Haan within a river.

CC a b The DNA barcoding and the caveats with respect to its application to some species of Palaemonidae Crustacea, Decapoda. Services on Demand Journal. The trap was placed near the macrophytes at depths of meters and remained at each site for 30 minutes. In this species, sexually mature males can have different morphotypes, which have different sizes, morphology, physiology and behavior. Japanese Journal of Ecology, vol.


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.


IUCN Red List of Threatened Species

In another step, macrbrachium non-hierarchical analysis of K-means clustering was conducted, primarily to separate the juveniles from the adults and secondarily to separate the morphotypes.

Significant differences were found among all morphotypes, but CC vs. Biology Ocurrence of male morphotypes of Macrobrachium amazonicum Caridea, Palaemonidae in a population with an entirely freshwater life cycle.

As for fecundity by weight classes, the lowest number of eggs observed was and the highest, 1, Among the ovigerous M. The mean angle and standard deviation were then calculated for each group. According to Ramos et al. The collection site was amaxonicum downstream of the reservoir of Ibitinga Hydroelectric Power Plant, in a lotic environment with a sandy bottom and marginal vegetation consisting of grasses Cynodondactylon L. With respect to average macrobracnium F by length classes, the lowest and highest number of eggs observed was and 1, respectively.

From these results we can deduced that fecundity and fertility of M. Laboratory life history of the palaemonid shrimp Macrobrachium amazonicum Heller, Decapoda, Palaemonidae.

GC2 showed similar allometric coefficient rates Figure 3 and Table 3. Four samples of 30 minutes were taken monthly, using a trap, from January to April Biology, fisheries, and aquaculture of the Amazon River prawn Macrobrachium amazonicum: Macrobrachium amazonicum is the freshwater decapod of the greatest economic importance in the Eastern South Macroobrachium subcontinent Maciel and Valenti, 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.


However, when we compare our results with those obtained by Santos et al. In Brazil, the species is intensively exploited by artisanal fisheries; it is also consumed as human food, most commonly in Northeastern Brazil and in the Amazon region, by all social classes Moraes-Valenti and Valenti, ; Marques and Moraes-Valenti, University of Southern California Press.

Similarly, these two morphotypes presented similar body sizes in the present study, what was also demonstrated by Moraes-Riodades and Valenti In contrast, Vergamini et al. The authors are indebted to Mr. A significant difference between slope parameters of linear regressions describing fecundity, either in terms of numbers of eggs laid or of larvae released, in relation to female fresh weight, indicates egg losses.

TC a b Afterwards, the trap was removed, and the captured material was screened. Revue d’Hydrobiologie Tropicale, vol. The population from the lake had lower mean sizes, with a smaller size at sexual maturity. Gonadal structure analysis of Macrobrachium amazonicum Heller, from a wild population: Sampling Four samples were taken during the morning, in each month, from January through April 16 samples. In this work, the maximum number of larvae observed per hatching for females kept in macrobracgium was 2, Identification of morphotypes All measurements were based in the method of Kuris et al.

The adjusted equations are: Right cheliped length RCL ranged from 9. Four groups of males, differing in color,spination pattern and body relationships, were identified.