Longitudinal Zonation of Sandy Beach Fishes in the Napo River Basin, Eastern Ecuador

Ibarra, Myriam; Stewart, Donald J.

doi:10.2307/1445433

Cited by 66 publications

(61 citation statements)

References 31 publications

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“…The few studies conducted in tropical streams and rivers reveal patterns that generally agree with patterns from temperate regions (e.g. Ibarra andStewart 1989, Tito de Morais andLauzanne, 1994;Mazzoni and Lobon-Cervia, 2000). This gradual accumulation of species is often attributed to a downstream increase in habitat size, habitat diversity, or both (e.g.…”

Section: Processes Occurring At the Local Levelmentioning

confidence: 89%

“…Most common way is to select the reference sites that are "minimally disturbed" because pristine conditions no longer exist in most industrialized countries and coming back to prehistoric conditions first, will deny the place of humans in the landscape (Norris and Thoms, 1999) and second, will make restoration goals obsolete because obviously not attainable. Huet, 1959;Sheldon, 1968;Bussing and Lopez, 1977*;Sydenham, 1977*;Horwitz, 1978;Lauzanne and Loubens, 1988*;Angermeier and Karr, 1983*;Winemiller, 1983*;Mahon, 1984;Balon et al, 1986;Hugues and Gammon, 1987;Beecher et al, 1988;Matthews and Robinson, 1988;Paugy et al, 1988*;Ibarra and Stewart, 1989;Hugueny, 1990*;Lyons and Schneider, 1990*;Osborne and Wiley, 1992;Winemiller and Leslie, 1992*;Oberdorff et al, 1993;Lyons, 1996;Belliard et al, 1997;Maret et al, 1997;Mastrorillo et al, 1998;Kamdem-Toham and Teugels, 1997*;Mérigoux et al, 1998*;Angermeier and Winston, 1998;Matthews and Matthews, 2000;Tejerina Garro, 2001* Mérona, 1981* River gradient Huet, 1959Lyons, 1996;Maret et al, 1997;Mastrorillo et al, 1998;Waite and Carpenter, 2000;Oberdorff et al, 2001ª…”

Section: Fish-based Methods Currently Availablementioning

confidence: 99%

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Effects of natural and anthropogenic environmental changes on riverine fish assemblages: a framework for ecological assessment of rivers

Tejerina‐Garro

Maldonado

Ibáñez

et al. 2005

Braz. arch. biol. technol.

110

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Section: Processes Occurring At the Local Levelmentioning

confidence: 89%

Section: Fish-based Methods Currently Availablementioning

confidence: 99%

Effects of natural and anthropogenic environmental changes on riverine fish assemblages: a framework for ecological assessment of rivers

Tejerina‐Garro

Maldonado

Ibáñez

et al. 2005

Braz. arch. biol. technol.

110

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“…These observations are like those described by Laraque et al (2007) and Saul (1975). Detailed environmental observations and aquatic habitats of the region were thoroughly described in Ibarra, Stewart (1989), Galacatos et al (1996Galacatos et al ( , 2004, Silva, Stewart (2006) and Laraque et al (2007).…”

Section: Methodsmentioning

confidence: 99%

Reproduction, feeding and migration patterns of Prochilodus nigricans (Characiformes: Prochilodontidae) in northeastern Ecuador

Silva

Stewart

2017

Neotrop. ichthyol.

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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 frequency of empty stomachs and poor body condition corresponded to migration periods. Gonad condition analysis revealed a single, discrete spawning period in April (end of rising water season). We synthesized our own and published observations on migration patterns of black prochilodus and presumptive factors that influence those movements. Mature individuals make lateral migrations from peripheral flooded habitats to large white water rivers to spawn. Eggs and larvae drift downstream to nurseries at least into Peru and perhaps into Brazil; there do not appear to be nursery habitats in Ecuador. After 6-18 months, they migrate upstream, recruiting to parental stocks. Long-distance migrations of black prochilodus and similar fishes in Neotropical rivers disobey political boundaries. Conservation and management of such migratory fishes, thus, requires international co-operation and integrated conservation efforts.Keywords: Black prochilodus, Condition factor, Gonadalsomatic index, Life-history, Stomach fullness.El bocachico, Prochilodus nigricans, es una fuente importante de proteínas, distribuido en hábitats acuáticos de las tierras bajas de la Amazonía ecuatoriana. Se muestreo el peso de las gónadas, la condición corporal, y alimentación de esta especie para determinar la relación de estos parámetros biológicos con la variación hidrológica y patrones migratorios. Una frecuencia alta de estómagos vacíos y la pobre condición corporal corresponde a períodos de migración. El análisis del estado de las gónadas reveló un corto periodo de desove en abril (fin de la temporada de aumento del río). Hemos sintetizado nuestras observaciones propias y publicadas sobre migraciones del bocachico, así como los factores que presumiblemente influyen en estos movimientos. Los peces adultos migran lateralmente desde hábitats periféricos inundados hasta ríos de aguas blancas para desovar. Los huevos y larvas flotan aguas abajo hasta llegar a sitios de crianza en Perú y posiblemente en Brasil; no parece haber hábitats de crianza en Ecuador. Después de 6-18 meses, los bocachicos migran aguas arriba, reclutando a las poblaciones parentales. Las migraciones a larga distancia del bocachico y peces similares en ríos Neotropicales desobedecen las fronteras políticas. Una gestión apropiada de este recurso requiere de cooperación internacional y esfuerzos integrados de conservación.Palabras Clave: Bocachico, Factor de condición, Historia natural, Índice gonadosomático, Llenura del estómago.

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“…Ibarra & Stewart, 1989;Galacatos et al, 1996;Stewart et al, 2002;Galacatos et al, 2004). The Upper Amazon (sensu Hubert & Renno, 2006), which includes all rivers west of the Lower Madeira River, is characterized by high endemism and shares few species with other areas of the Amazon basin (Hubert & Renno, 2006).…”

Section: Introductionmentioning

confidence: 99%

Fish assemblage structure is consistent through an annual hydrological cycle in habitats of a floodplain-lake in the Colombian Amazon

Correa¹

2008

Neotrop. ichthyol.

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Fish assemblage structure is consistent through an annual hydrological cycle in habitats of a floodplain-lake in the Colombian Amazon Sandra Bibiana Correa I investigated changes in abundance and spatial distribution of medium-and large-sized fishes (>100 mm) in an oxbow lake of the lower Apaporis River, Colombian Amazon, across three seasons (falling, low, and rising water). Fifty-three species in 13 families were collected from six habitats: lagoon channels, stream, flooded forests, isolated shrub patches, muddy beaches, and rocks. Abundance, biomass, and species richness were higher during the rising-water season and lower during fallingwater season. Correspondence analysis (CA) showed that fish assemblages were associated to two basic habitat types. One assemblage of fishes was associated with densely vegetated and structurally complex habitats (flooded forest, lagoon channels, stream, and isolated shrub patches), and a second assemblage of fishes was associated with muddy beaches. These assemblages persisted despite seasonal fluctuations in water level. Species in the structurally complex habitats assemblage were mostly omnivores, whereas the beach habitat assemblage included mainly piscivores and detritivores. Results from this study suggest that overall abundance of fishes in habitats within and surrounding Taraira Lake is highly variable among seasons, but species habitat affinity is maintained through seasons.Neste estudo, investiguei mudanças na abundância e distribuição espacial de peixes de médio a grande porte (> 100 mm) em um lago do baixo rio Apaporis, na Amazônia colombiana, durante três períodos hidrológicos (águas descendentes, baixas e ascendentes). No total foram coletadas 53 espécies, pertencentes a 13 famílias, em 6 hábitats: bosque inundado, canais, um arroio, grupos isolados de arbustos, praias e grandes rochas. A abundância, biomassa e riqueza de espécies foram maiores durante as águas ascendentes e menores durante as águas descendentes. Uma análise de correspondência (CA) mostrou que grupos de peixes se associaram a dois tipos básicos de hábitat. Um grupo de peixes se associou com hábitats com alta cobertura vegetal e complexidade estrutural (bosque inundado, canais, arroio e grupos isolados de arbustos) e um segundo grupo de peixes se associou com praias arenosas. Estas associações de espécies se mantiveram apesar da flutuação no nível da água. Espécies em hábitats estruturalmente complexos foram principalmente de hábitos omnívoros, enquanto que o grupo associado a praias incluiu principalmente piscívoros e detritívoros. Os resultados deste estudo sugerem que a abundância de peixes no lago Taraira e em hábitats adjacentes é variavel estacionalmente, porém a afinidade das espécies pelo hábitat se mantem através dos períodos hidrológicos.

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Longitudinal Zonation of Sandy Beach Fishes in the Napo River Basin, Eastern Ecuador

Cited by 66 publications

References 31 publications

Effects of natural and anthropogenic environmental changes on riverine fish assemblages: a framework for ecological assessment of rivers

Effects of natural and anthropogenic environmental changes on riverine fish assemblages: a framework for ecological assessment of rivers

Reproduction, feeding and migration patterns of Prochilodus nigricans (Characiformes: Prochilodontidae) in northeastern Ecuador

Fish assemblage structure is consistent through an annual hydrological cycle in habitats of a floodplain-lake in the Colombian Amazon

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