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Fecundity and fertility of Macrobrachium amazonicum (Crustacea, Palaemonidae)
da Silva, R. R.;Sampaio, C. M. S.;Santos, J. A.;
Brazilian Journal of Biology , 2004, DOI: 10.1590/S1519-69842004000300012
Abstract: in brazil, studies with native freshwater prawn species were discontinued due to great importance of macrobrachium rosenbergii. therefore, it is necessary to continue investigations about our species, in order to develop technology adequate to our reality and in a future allow prawn farmers to culture other species. the aim of this study was to determine the fecundity and fertility of macrobrachium amazonicum captured monthly from june 1999 to june 2001 from jaguaribe river, itai?aba, ceará, brazil. prawns were collected using fishing net and transferred at biological science laboratory, ceará state university (fortaleza, ceará, brazil). among the ovigerous m. amazonicum females, 60 were randomly selected to determine fecundity. the eggs adhered to the pleopods were taken out and they were then placed in a gilson solution, and then stored in alcohol 70%. individual fecundity was determined from the total egg counting, using a stereoscopic microscope. to determine fertility, ovigerous m. amazonicum females were stored in individual 10 l-glass tanks maintained under strong aeration. after the hatching, the larvae were siphoned and counted. the data referring to total length and weight of all the females, storage date, coloration and number of eggs, weight and coloration of gonad and number of hatched larvae were noted. with respect to average fecundity (f) by length classes, the lowest and highest number of eggs observed was 696 and 1,554, respectively. as for fecundity by weight classes, the lowest number of eggs observed was 760 and the highest, 1,690. the highest number of eggs observed individually per hatching was 2,193. average fecundity/total length (l) and average fecundity/total weight (w) may be expressed by a linear relationship. the adjusted equations are: f = -411.6 + 203.1 l (p < 0.0001) and f = 566.4 + 157.3 w (p < 0.0001), respectively. in the analysis of average fertility (n) per length classes, the lowest and highest number of larvae observed was 374
Crescimento relativo do camar?o canela Macrobrachium amazonicum (Heller) (Crustacea, Decapoda, Palaemonidae) em viveiros
Moraes-Riodades, Patrícia M.C.;Valenti, Wagner C.;
Revista Brasileira de Zoologia , 2002, DOI: 10.1590/S0101-81752002000400023
Abstract: some morphometric relationships in macrobrachium amazonicum (heller, 1862) reared in earthen ponds were studied. a total of 239 individuals were collected, sexed and sorted to juvenile or adult. total length (lt), post-orbital length (lpo), carapace length (lcp) and queliped length (lql) were measured. the relationships lt/lpo, lpo/lcp and lt/lcp are the same for juveniles, males and females, indicating unchanged growth pattern during post-larval ontogenetic development. while lt/lpo showed isometric growth, lpo/lcp and lt/lcp showed negative allometry. on the other hand, for the lql/lcp relationship, juveniles showed isometric growth, females slight positive allometry and males a strong positive allometry. it suggests that the importance of chelipeds may be different in these groups. quelipeds play important role on food capture and on agonistic, social and reproductive behavior. therefore, inter and intraspecific interactions may change during prawn growth, even after morphological
Bioasimilación de oligoelementos en el camarón de río, Macrobrachium amazonicum (crustacea, palaemonidae)
Yolimar Carvajal,Wuili Orozco,Jorge Amaya,Saida Matute
Bioagro , 2009,
Abstract: El camarón de río, Macrobrachium amazonicum, presenta características que lo se alan como un organismo con potencial para el cultivo. El objetivo de este estudio fue evaluar su composición bromatológica y bioasimilación de los elementos Fe, Cu, Zn y Se. Para analizar la capacidad de bioasimilación se distribuyeron 300 individuos juveniles en 15 acuarios de 20 L para evaluar cinco tratamientos con tres repeticiones cada uno en un dise o de bloques al azar. Un grupo control fue alimentado con concentrado comercial. Para los tratamientos experimentales se mezcló el alimento concentrado con cada elemento por separado, en concentraciones dos veces mayor a las establecidas para especies similares. Luego de 20 días los camarones se sacrificaron separando el tejido muscular del exoesqueleto para su posterior análisis. El grupo control presentó 58,1 % de proteínas, 11,0 % de grasas, 8,6 % de carbohidratos y 0,15 % de fósforo. Se detectaron diferencias significativas en el tejido muscular de los camarones que recibieron alimento suplementado con cobre, con respecto al control (170 vs. 130 mg·kg-1, respectivamente) y con cinc (80 vs. 70 mg·kg-1, respectivamente). Estas diferencias fueron mayores cuando se evaluaron las concentraciones en el exoesqueleto (200 vs. 140 mg·kg-1 para cobre y 100 vs. 90 mg·kg-1 para cinc). Los resultados sugieren que este camarón representa una fuente rica en oligoelementos cuando se compara con otros alimentos de la dieta humana y presenta una cierta capacidad para la bioacumulación de cobre y cinc, especiamente en el exoesqueleto. The river prawn, Macrobrachium amazonicum, presents characteristics that make it potentially desirable for culture. The objective of this study was to evaluate its proximal analysis and bioaccumulation of the elements Fe, Cu, Zn and Se. In order to analyze its bioaccumulation capability, 300 juvenile individuals were distributed into 15 20-L aquaria and five treatments with three repetitions were evaluated in a completely randomized block design. A control group of prawns was feed with commercial fish food. Prawns in the experimental treatments were feed with fish food mixed separately with each one of the elements (Fe, Cu, Zn, Se).The concentration level being twice the nutritional requirements for similar species. After 20 days prawns were sacrificed to split the exoskeleton from the muscular tissue for later analysis. The control group showed a content of 58.1 % protein, 11.0 % fats, 8.6 % carbohydrate, and 0,15 % phosphorus. Significant differences were found within the muscular tissue when compared the
Bioasimilación de oligoelementos en el camarón de río, Macrobrachium amazonicum (crustacea, palaemonidae)
Carvajal,Yolimar; Orozco,Wuili; Amaya,Jorge; Matute,Saida; Merú Marcó,Lué; Poleo,Germán;
Bioagro , 2009,
Abstract: the river prawn, macrobrachium amazonicum, presents characteristics that make it potentially desirable for culture. the objective of this study was to evaluate its proximal analysis and bioaccumulation of the elements fe, cu, zn and se. in order to analyze its bioaccumulation capability, 300 juvenile individuals were distributed into 15 20-l aquaria and five treatments with three repetitions were evaluated in a completely randomized block design. a control group of prawns was feed with commercial fish food. prawns in the experimental treatments were feed with fish food mixed separately with each one of the elements (fe, cu, zn, se).the concentration level being twice the nutritional requirements for similar species. after 20 days prawns were sacrificed to split the exoskeleton from the muscular tissue for later analysis. the control group showed a content of 58.1 % protein, 11.0 % fats, 8.6 % carbohydrate, and 0,15 % phosphorus. significant differences were found within the muscular tissue when compared the control group vs. prawns fed with food with copper (130 vs. 170 mg·kg-1) and zinc (70 vs. 80 mg·kg-1). the differences were higher when element concentrations were evaluated in the exoskeleton (140 vs. 200 mg·kg-1 for copper, and 90 vs. 100 mg·kg-1 for zinc). this study showed that this prawn represents a rich source of oligoelements when compared with other foods for human consumption, and has some capability for bioaccumulation of copper and zinc, especially at the exoskeleton tissue.
Crescimento relativo de Macrobrachium acanthurus (Wiegmann, 1836) (Crustacea, Decapoda, Palaemonidae)
Valenti, Wagner Cotroni;Lob?o, Vera Lúcia;Mello, Jeanette T. Cardoso de;
Revista Brasileira de Zoologia , 1989, DOI: 10.1590/S0101-81751989000100001
Abstract: in this paper, the relative growth of macrobrachium acanthurus (wiegmann, 1836) (crustacea, decapoda, palaemonidae), is presented; the cephalothorax length/abdominal length, telson length/abdominal length and abdominal length/total length relashionships were determined. the adjusted equations showed a isometric growth pattern. there are no changes in these relationships during the animals growth that may be significant in the maximization of the meat's profit.
Fecundidade em Macrobrachium acanthurus (Wiegmann, 1836) do Rio Ribeira de Iguape (Crustacea, Decapoda, Palaemonidae)
Valenti, Wagner Cotroni;Mello, Jeanette de T. Cardoso de;Lob?o, Vera Lúcia;
Revista Brasileira de Zoologia , 1989, DOI: 10.1590/S0101-81751989000100002
Abstract: in this paper, the fecundity in macrobrachium acanthurus (wiegmann, 1836) of the ribeira de iguape river (southern brazil) (crustacea, decapoda, palaemonidae), is presented. the mean individual fecundity of the population was estimated. fecundity was related to either length and/or weight. our data showed that this species presents high fecundity and is thus suitable for comercial culture. the fecundity/length and fecundity/weight relationships obtained are: f = - 14 712 + 2 311,8 l and f = -1493,9 + 798,76 w
Reproductive and morphometric traits of Macrobrachium amazonicum (Decapoda: Palaemonidae) from the Pantanal, Brazil, suggests initial speciation
Liliam Hayd,Klaus Anger
Revista de Biología Tropical , 2013,
Abstract: The palaemonid shrimp Macrobrachium amazonicum shows an unusually large geographic range (ca. 4 000km across) living in coastal, estuarine, and limnic inland habitats of the upper Amazon, Orinoco, and La Plata basins. This raises doubts whether allopatric, ecologically diverse populations belong to the same species. While shrimps from estuarine and Amazonian habitats have been studied in great detail, very little is known about hololimnetic inland populations. In the present study, biological traits related to growth (maximum body size, fresh weight, morphometric relationships) and reproduction (sex ratio; occurrence of male morphotypes; minimum sexable size; minimum size of ovigerous females; fecundity; egg size), were studied in M. amazonicum collected from a pond culture and two natural freshwater habitats (Rio Miranda; Lagoa Baiazinha) in the Pantanal of Mato Grosso do Sul, Brazil. In total, 2 270 shrimps were examined (603 males; 1 667 females, 157 of these ovigerous). Sex ratio (males:females) was at all sampling sites strongly female-biased, ranging from 0.2-0.6. 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. Maximum fecundity observed in our material was 676 eggs, reached by the largest female (TL=65mm; Lagoa Baiazinha). 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. This may be due in part to a 2.4-fold increase in egg volume occurring during the course of embryonic development, while the available space under the abdomen remains limited. Size-weight relationships differed significantly between males and females, indicating sexspecific morphometric differences. Males appear to have a more slender body shape than females, reaching thus lower weight at equal TL. 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: (1) maximum body size is far smaller, suggesting shorter longevity; (2) females are consistently larger than males; (3) different male morphotypes are absent; (4) minimum sexable size and (5) minimum size of ovigerous females are smaller. These traits suggest a heterochronic shift (predisplacement) of sexual maturation and r-selection. In summary, our data show b
Crescimento em viveiro de cultivo do camar?o canela (Macrobrachium Amazonicum) (Decapoda, Palaemonidae)
Coelho, Petr?nio Alves;Ramos-'Porto, Marilena;Barreto, Aline do Vale;Costa, Vandete Elias da;
Revista Brasileira de Zoologia , 1982, DOI: 10.1590/S0101-81751982000100007
Abstract: prawn growth in intensive culture ponds depends upon the cultured species and internal (nutrition state) and external (pond condition) factors. to obtain growth taxa in aquaculture for the "canela" prawn (macrobrachium amazonicum), experiments were carried out at amapá and pernambuco, brazil. the initial prawn population of amapá ponds carne from different places of the amazon river, while those from pernambuco from hatcheries of the departamento de oceanografia da universidade federal de pernambuco. physico-chemical and biological analyses of the water were made at the same time. the growth rate was estimated through collections of samples of about 10% of the initial population, with measures of the orbital length of each individual. ponds' harvests were done when most of the population presented an orbital length equal to or larger than 80 mm. the present results showed 70 mm average size after 3-4 months of the post-larvae settlement to be the ideal for harvesting, favouring the utilization of this species for intensive aquaculture. data on correlation, orbital and total growth, and weight gain were obtained during prawn growth.
Asociación entre el tama?o del depredador (pavón, Cichla orinocensis) y la presa (camarón de río, Macrobrachium amazonicum) y sus relaciones morfométricas
Madrid,Fernando;
Bioagro , 2009,
Abstract: the relation predator-prey between the river shrimp macrobrachium amazonicum (crustacea:decapoda:palaemonidae) and the peacock bass cichla orinocensis ( pisces:perciformes: cichlidae) were evaluated at laboratory level, with the aim of using this fish as a biological controller. the river shrimp is considered a plague by the ?cachama? fish farmers of the central-western and high plains regions of venezuela, due to its high rate of reproduction in cultured ponds. the high number of river shrimps affects dissolved oxygen concentration in the water, partially consumes fish feed, and hampers the mobilization of networks in ponds. the equation that correlates the peacock bass mouth opening (mo, mm) with its weight (wp, g) and standard length (sl, mm) was expressed as mo = -48.2060 + 2.0544 sl + 2.0505 wp. also, the following equations that express some morphometric relations were established: wp = 1.131 · 10 -5 · sl3.217, and ws = 7.8311 x 10-3 tl 2.9737, where tl is the total length for shrimp and ws its weight. a positive correlation between sizes of predator and prey was observed, but with no preferences for any particular size. in function of the oral cavity capacity, the peacock bass can consume river shrimp up to 80 % of its own size.
Ontogenesis and functional morphology of the digestive system of the freshwater prawn, Macrobrachium amazonicum (Decapoda: Palaemonidae)
Queiroz, Luciano D.;Abrunhosa, Fernando A.;Maciel, Cristiana R.;
Zoologia (Curitiba) , 2011, DOI: 10.1590/S1984-46702011000300014
Abstract: the appropriate feeding regime for larvae and post-larvae of crustacean decapods is essential for successful larval culture. reports on the development and morphology of the mouthparts and foregut of these crustaceans have aided in the selection of appropriate larval foodstuffs and consequently increased larval survival and growth rate during development. in the present study, the functional morphology of foregut and mouthparts was investigated in larvae and post-larvae of the freshwater prawn m. amazonicum (heller, 1862). from observations gathered on both the outer and inner feeding apparati the first stage larvae have obligatory lecithotrophy and feeding behaviour is initiated after molting to the second stage. the foregut of the larvae undergoes diverse morphological changes during larval development and the larval foregut of this species is primarily a mixing organ due to the absence of gastric mills and similar structures. after metamorphosis into post-larvae, drastic morphological changes occur in the foregut and mouthparts to adapt the animals to feed on the greater diversity of foods that are available in their new benthic habitat.
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