Results 21 to 30 of about 2,932 (193)

Weight-Length Ratio of Piranhas <i>Serrasalmus</i> (Characiformes, Serrasalmidae) in Bolivia: Relationships to Molecular Divergence and Maximum Size? [PDF]

Ecol Evol
This study presents WLRs of nine piranha or palometa fish species of genus Serrasalmus present in the Amazon and La Plata basins of Bolivia and compares differences with genetic divergence (mtDNA COI locus) and the observed maximum size. All species showed an exponential (power type) growth pattern, and all WLRs were significantly different among all ...
Carvajal-Vallejos FM, Gallo-Cardozo F, Careaga M, Campero M.   +3 more
europepmc   +2 more sources

Application of environmental DNA metabarcoding to identify fish community characteristics in subtropical river systems. [PDF]

Ecol Evol
Environmental DNA (eDNA), coupled with PCR and next‐generation sequencing, and electrofishing were used to compare their effects in identifying fish community characteristics. Our results demonstrated that eDNA metabarcoding can be used as an effective tool in revealing fish composition and diversity, which is important for using the eDNA technique in ...
Wang S, Wu DH, Song YD, Wang TT, Fan SD, Wu EN, Chen NL, Xia WT, Xu MN, Chen ZB, Wen J, Zhang Y, Mo L, Xiang L.   +13 more
europepmc   +2 more sources

Estudio histológico del sistema digestivo en diferentes estadios de desarrollo de la cachama blanca (Piaractus brachypomus)

Revista de Medicina Veterinaria, 2013
La cachama blanca (Piaractus brachypomus) es la segunda fuente de producción piscícola en Colombia, después de la tilapia roja (Oreochomi ssp.) y antes de la trucha arcoíris (Oncorhynchus mykiss).
Miguel Ángel Mendoza R., Jair Comas Corredor, Clara Stefany Romero Hurtado   +2 more
doaj   +1 more source

Crescimento de juvenis de Piaractus brachypomus alimentados com dietas contendo diferentes perfis de aminoácidos essenciais

Pesquisa Agropecuária Brasileira, 2013
O objetivo deste trabalho foi determinar o efeito de dietas com diferentes perfis de aminoácidos essenciais (AAE) sobre a eficiência de utilização de nutrientes e o crescimento de juvenis de pirapitinga (Piaractus brachypomus).
Wálter Vásquez-Torres, José Alfredo Arias-Castellanos   +1 more
doaj   +1 more source

Spatial Variation in Food Web Structures, Energy Flows, and System Attributes Along the Pearl River and Their Indications of Protection and Restoration. [PDF]

Ecol Evol
The undisturbed island zone, which provided essential feeding/spawning habitats, should be protected to maintain river health. The food web structure in the industrial zone was collapsed due to water pollution and habitat degradation. The appearance of softshell turtles and herbivorous/molluscivorous fish can be used to indicate the integrity of the ...
Wang S, Song YD, Wu EN, Wang TT, Iqbal MS, Ou HL, Xie J, Xia WT, Yang FJ, Feng J, Wu SH, Zhang Y, Jin CC, Ma ZL, Zhang HJ, Miao LY, Wang KS.   +16 more
europepmc   +2 more sources

Utilización de la proteína dietaría por alevinos de la gamitana, Colossoma macropomum, alimentados con dietas isocalóricas [PDF]

, 2010
Un experimento fue conducido para evaluar los efectos de cinco niveles de proteína (25,27, 29, 31 y 33%) sobre el comportamiento productivo de alevinos de la gamitana, Colossoma macropomum Cuvier 1818, alimentados con dietas isocalóricas (2,7 kcal de ED ...
Félix Walter Gutiérrez, Guadalupe Contreras, Javier Zaldívar, Luz Valenzuela, Máximo Quispe   +4 more
core   +3 more sources

Behavior of Rio Sao Francisco Piranhas in Response to Changes in Space and Density. [PDF]

Zoo Biol
ABSTRACT Previous observations of Rio Sao Francisco piranhas (Pygocentrus piraya) at Cleveland Metroparks Zoo revealed frequent aggressive interactions, which were associated with the injury and death of some individuals. Fishes are known to increase aggressive behavior when available space is limited.
Oldfield RG, Thal JE, Zarlinga NJ, Lukas KE, Wark JD.   +4 more
europepmc   +2 more sources

Cryopreservation of Embryos and Oocytes of South American Fish Species [PDF]

, 2014
Non
Digmayer, M., Fornari, D.C., Godoy, L.C., Ribeiro, R.P., Streit Jr, D.P., Zhang, Tiantian   +5 more
core   +1 more source

Cooling of pirapitinga (Piaractus brachypomus) embryos stored at −10ºC

Zygote, 2014
SummaryCryopreservation has not been used successfully to preserve fish embryos, although chilling techniques have been used with good results. The aim of this study was to chill Piaractus brachypomus embryos at – 10°C for various storage times. Embryos at the following ontogenetic stages were used: blastoderm – 1.2 hours post-fertilization (hpf ...
Nathalie Ommundsen, Pessoa, José Agenor Soares, Galvão, Francisco Gerson Mendes, de Souza Filho, Míriam Luiza Nogueira Martins, de Sousa, Célia Maria Souza, Sampaio   +4 more
openaire   +4 more sources

Determinación de ectoparásitos en Piaractus brachypomus cultivados en piscinas de tierra

RECIMUNDO, 2022
La investigación se centra en la determinación de ectoparásitos que pueden afectar el cultivo de la Cachama Blanca (Piaractus brachypomus) desarrollado en el Cantón Daule, se trabajó con una población total de 210 peces de los cuales 90 fueron muestreados, tomadas al azar de dos piscinas de tierra localizadas en la Facultad de Medicina Veterinaria y ...
Aldo José Loqui Sánchez, Juan Bryan Peña Elizalde, Marcelo Erik Zambrano Alarcon, Jenny Quiñonez Bustos   +3 more
openaire   +1 more source