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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Macrobrachium amazonicum

All measurements were based in the method of Kuris et al. These differences seem to be closely related to ecological characteristics of the environments inhabited by these populations. Brownish coloring was predominant in chelipeds. However, this estimative is not available in the works of Santos a,azonicum al. They remain small, cryptic, and highly mobile Bauer, However, when we compare amzzonicum results with those obtained by Santos et al.

The DNA barcoding and the caveats with respect to its application to some species of Palaemonidae Crustacea, Decapoda.

A rapid assessment of the decapod fauna in the Rio Tahuamanu macrobrahcium Rio Manuripi Basins, with new records of shrimps and crabs for Bolivia Crustacea, Decapoda, Palaemonidae, Sergestidae, Trichodactylidae. Thus, the passage from one morphotype to another in a natural environment could occur through a single molt. This type of mating behavior was also observed in the Pantanal shrimps by Hayd and Anger In another step, a non-hierarchical analysis of K-means clustering macrobrcahium conducted, primarily to separate the juveniles from the macrobrachuum and secondarily to separate the morphotypes.

From lecithotrophy to planktotrophy: CC a b The bait used for this sample was crushed corn and viscera of fish, similar to that used by most sport fishermen. Male population structure of the Amazon River prawn Macrobrachium amazonicum in a natural environment. La peche crevettiere de Macrobrachium amazonicum Palaemonidae dansleBas-Tocantins apreslafermeturedubarrage de Tucurui Bresil.

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

This study recorded for the first time, the occurrence of all four male morphotypes of M. 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.


Four samples of 30 minutes were taken monthly, using a trap, from January to April This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Consequently, we could determine which of these initial amazohicum has more influence on the differentiation of possible morphological categories morphotypes. It was reported that freshwater individuals differ from estuarine individuals in a few essential reproductive characteristics. Contributions to Zoology, vol. Therefore, it is necessary to continue investigations about our species, in order to develop technology adequate to our reality and in amaznoicum future allow prawn farmers to culture other species.

Identification of morphotypes All measurements were based in the method of Kuris et al.

Once captured, the prawns were immediately taken to the laboratory for analysis. All these differences persist also in long-term cultures maintained under constant conditions.

The input of nutrients into the local environment, as occurs in the cage farming stretch, enriches the trophic web, influencing the secondary production more markedly than the primary production. The relative growth was analyzed based on the change in growth patterns of certain body parts in relation to the independent variable CL.

Males appear to have a more slender body shape than females, reaching thus lower weight at equal TL. Morphologic and morphometric analysis confirmed the division of male Macrobrachium amazonicum into distinct groups. Culture of the Amazon River Prawn Macrobrachium amazonicum. Different biological characteristics were found between the populations studied.

However it is clearly not characteristic of the studied population here, which presents large male morphotypes with strongly developed chelipeds. The male population of the lake of Ibitinga and from Pantanal presented mean sizes and number of morphotypes lower than the population studied here.


Sampling Four samples were taken during the morning, in each month, from January through April 16 samples. How to cite this article. In general chelipeds were greenish and terminal segments carpus, propodus and dactyl more intensely moss green coloured. Only males were macrobrachiim in the analysis. Significant differences were found among all morphotypes, but CC vs.


A possible explanation for the differences noted is the fact that M. This also occurs with size of morphological sexual maturity, estimated with relative growth at 4. Additionally, here we compare the sizes and male morphotypes of M.

Reproductive and morphometric traits of Macrobrachium mqcrobrachium Decapoda: Allan Hancock Foundations Publications. Maximum body size was larger in natural habitats compared to the pond culture, suggesting reduced growth or a shorter life span under artificial mass rearing conditions.

This study records, for the first time, the occurrence of all four male morphotypes in a population of Macrobrachium amazonicum from a continental environment, with an entirely freshwater life cycle.

Macrobrachium amazonicum – Wikispecies

March 19, ; Accepted: These morphotypes differ mzcrobrachium cheliped morphology and in certain morphometric relationships. However, cheliped length was always greater in GC2. In summary, our data show biologically relevant differences in life-history traits of shrimps from the Pantanal compared to M.

June 5, ; Revised: This raises doubts whether allopatric, ecologically diverse populations belong to the same species.

This oversupply of food also ends up attracting prawns, which are usually used as bait, especially to catch silver croaker Plagioscion squamosissimus Heckel, Carapace length ranged from 4.

The adjusted equations are:

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