Fishes
Mostrando 49-60 de 638 artigos, teses e dissertações.
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49. Comparative analysis of diet composition and its relation to morphological characteristics in juvenile fish of three lutjanid species in a Mexican Pacific coastal lagoon
ABSTRACT The main goal of this research was to investigate the differences in diet composition among three species of the genus Lutjanus inhabiting a coastal lagoon as juveniles. The working hypothesis was that these species feed on a common base of food resources and therefore, some niche overlap is present in terms of general diet composition. However, cha
Neotrop. ichthyol.. Publicado em: 21/12/2017
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50. Imputation of genetic composition for missing pedigree data in Serrasalmidae using morphometric data
ABSTRACT This study aimed to impute the genetic makeup of individual fishes of Serrasalmidae family on the basis of body weight and morphometric measurements. Eighty-three juveniles, belonging to the genetic groups Pacu, Pirapitinga, Tambaqui, Tambacu, Tambatinga, Patinga, Paqui and Piraqui, were separated into 16 water tanks in a recirculation system, with
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-12
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51. Parasitic communities of Hoplosternum littorale (Hancock, 1828) as indicators of environmental impact
ABSTRACT The parasites are indicative of several biological aspects of their hosts, including their diet, migration, recruitment and phylogeny, but they can also be direct indicators of the environmental quality. Hoplosternum littorale is a fish that has a high commercial value in some South American countries. The fishes were collected from January to July
An. Acad. Bras. Ciênc.. Publicado em: 23/10/2017
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52. Reproduction, feeding and migration patterns of Prochilodus nigricans (Characiformes: Prochilodontidae) in northeastern Ecuador
ABSTRACT The black prochilodus, Prochilodus nigricans, is an important food fish distributed throughout aquatic habitats of the Ecuadorian Amazon. We sampled gonad weight, body condition, and feeding of this species to address the question of whether changes in these biological parameters are related to hydrological variation and migration patterns. High fre
Neotrop. ichthyol.. Publicado em: 05/10/2017
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53. The contribution of environmental factors to fish assemblages in the Río Acahuapa, a small drainage in Central America
ABSTRACT The ichthyofauna of the Río Acahuapa was analyzed sampling 17 sites that included the basin main channel and its tributaries. Fish were collected using dip-nets, seine-nets and electrofishing. Fish standard length and species abundance were recorded. Species origin and salinity tolerance criteria were used to classify fish species. Water physicoche
Neotrop. ichthyol.. Publicado em: 05/10/2017
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54. Biogeography of Amazonian fishes: deconstructing river basins as biogeographic units
RESUMO A biogeografia dos peixes amazônicos (2.500 espécies de diferentes linhagens) é complexa e até agora foi abordada apenas parcialmente. Aqui abordamos o problema com base no maior banco de dados já feito sobre a distribuição geográfica e as relações filogenéticas dos peixes amazônicos, incluindo todas as informações disponíveis. A distri
Neotrop. ichthyol.. Publicado em: 28/09/2017
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55. A Bayesian analysis of the parasitic ecology in Jenynsia multidentata(Pisces: Anablepidae)
ABSTRACT Jenynsia multidentata Jenyns, 1842 (one-sided livebearers) are euryhaline viviparous fish of small size, used in the laboratory experiment, important as resource for biological control of mosquito’s larva and a key species to recover eutrophic lakes. Works have been published dealing with parasite biodiversity of this host, but little has been stu
Iheringia, Sér. Zool.. Publicado em: 28/09/2017
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56. Estudios arqueofaunísticos en un contexto estratigráfico de las llanuras interiores de Entre Ríos: el sitio Laguna del Negro 1 (departamento Gualeguay, Argentina)
Abstract The virtual absence of zooarchaeological data from the extensive inland plains of Entre Ríos, northeastern Argentina, can be explained by the scarcity of archaeological investigations and the lack of stratigraphic contexts available for study. Recently, the detection and excavation of Laguna del Negro 1, a late Holocene site with evidence of multip
Bol. Mus. Para. Emílio Goeldi. Ciênc. hum.. Publicado em: 2017-08
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57. Sustained swimming improves fish dietary nutrient assimilation efficiency and body composition of juvenile Brycon amazonicus
ABSTRACT Sustained swimming (SS) usually promotes beneficial effects in growth and feed conversion of fishes. Although feed efficiency is improves at moderate water velocity, more information is required to determine the contributions of this factor on growth and body composition. Body composition and efficiency responses to the use of nutrients were determi
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-08
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58. Rocinela signata (Isopoda: Aegidae) parasitizing the gills of the spotted goatfish Pseudupeneus maculatus (Actinopterygii: Mullidae) in Northeastern Brazil
ABSTRACT Parasitic isopods of fishes usually show wide distribution and low host specificity. This study investigated the occurrence of gill parasites in 120 specimens of spotted goatfish Pseudupeneus maculatus, marine fish of great economic importance for fishery community. The fish were captured monthly in the Coast of Pernambuco State, Northeast Brazil, b
An. Acad. Bras. Ciênc.. Publicado em: 20/07/2017
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59. Resource use by two electric fishes (Gymnotiformes) of the National Forest Saracá-Taquera, Oriximiná, Pará
RESUMO Peixes da ordem Gymnotiformes apresentam alta diversidade morfológica, o que sugere a existência de especializações tróficas dentro dos clados. O objetivo deste estudo foi analisar o uso de recursos por duas espécies de peixes elétricos (Gymnorhamphichthys rondoni e Gymnotus coropinae) na Floresta Nacional Saracá-Taquera, Oriximiná - Pará, a
Neotrop. ichthyol.. Publicado em: 22/05/2017
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60. A new species of Tereancistrum (Monogenea, Dactylogyridae) from the gills of three Leporinus species (Characiformes, Anostomidae) and a revised description of Tereancistrum parvus
ABSTRACT The present study describes Tereancistrum flabellum n. sp. (Dactylogyridae, Ancyrocephalinae) from the gills of the anostomid fishes Leporinus friderici, Leporinus amblyrhynchus and Leporinus elongatus from two freshwater ecosystems in the south east of Brazil. This new species is mainly characterized by the morphology of the copulatory complex (suc
An. Acad. Bras. Ciênc.. Publicado em: 02/05/2017