Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-08-24T18:39:52Z No. of bitstreams: 1 2008 - Cristiane Honorato Cunha.pdf: 767814 bytes, checksum: 805ea6db9e6a4462ae4375d06559e0fd (MD5) / Made available in DSpace on 2018-08-24T18:39:52Z (GMT). No. of bitstreams: 1 2008 - Cristiane Honorato Cunha.pdf: 767814 bytes, checksum: 805ea6db9e6a4462ae4375d06559e0fd (MD5) Previous issue date: 2008-03-25 / Macrobrachium acanthurus is the freshwater prawn species that is find in almost whole coastal rivers in Brazilian coast. This work was carried out to get information about reproductive aspects of Macrobrachium acanthurus in captivity and the influence on unilateral eyestalk ablation technique. 48 females and 24 males were captured in Sahy river at Mangaratiba/RJ and kept in adaptation for 15 days. Then, the animals carapace length and total length were measured. They were distributed into 20 liters aquariums, each of them with two males and four females. Two females in each aquarium were ablated. Abiotic factors such as pH, ammonia, nitrite and oxygen levels were checked weekly and the water temperature daily. Every day the occurrence of ovigerous females were checked in each aquarium. After three days incubating, the ovigerous females were separated until the larvae eclosion. And then, they were returned to the aquarium for a new phase of reproduction. The animals were fed with ration pellets and pieces of fish. The U test (Mann-Whitney) showed a significant difference among laying intervals between the ablated and non-ablated females. The Pearson correlation showed temperature influence on incubation period on non-ablated females, but on ablated females there was no dependency relationship. The t-test showed no significant difference on fertility, between ablated and non-ablated M. acanthurus. / Macrobrachium acanthurus ? uma esp?cie de camar?o de ?gua doce encontrado em quase todos os rios litor?neos da costa brasileira. Este trabalho foi realizado com o objetivo de obter informa??es sobre a influ?ncia da t?cnica de abla??o unilateral do ped?nculo ocular na reprodu??o de Macrobrachium acanthurus em cativeiro. Foram utilizados no experimento 48 f?meas e 24 machos, que foram coletados no Rio Sahy, Mangaratiba/RJ e foram mantidas durante 15 dias para a adapta??o. Posteriormente, os animais foram medidos em rela??o ao comprimento da carapa?a e comprimento total, distribu?dos na propor??o de dois machos para quatro f?meas em doze aqu?rios com capacidade de 20 litros. Das quatro f?meas de cada aqu?rio, duas foram abladas. Os fatores abi?ticos como o pH, am?nio, nitrito e oxig?nio dissolvido foram verificados semanalmente e a temperatura da ?gua diariamente. Todos os dias foram verificados a ocorr?ncia de exterioriza??o dos ovos em cada f?mea. As f?meas ov?geras ap?s tr?s dias de incuba??o foram individualizadas at? a eclos?o das larvas. Ap?s a eclos?o das larvas, as f?meas retornaram para o aqu?rio para uma nova fase de reprodu??o. Os animais foram alimentados com ra??o peletizada e peixe fresco. Atrav?s do teste U (Mann-Whitney) foi verificado que houve diferen?a significativa para o intervalo entre as desovas entre f?meas abladas e n?o abladas. Atrav?s da Correla??o de Pearson verificou-se que houve influ?ncia da temperatura no tempo de incuba??o nas f?meas n?o abladas, mas nas f?meas abladas n?o houve rela??o dependente. Atrav?s do teste t foi verificado que n?o houve diferen?a significativa para fertilidade entre as f?meas abladas e n?o abladas de M. acanthurus.