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Now showing items 1-20 of 37
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Addressing longitudinal connectivity in freshwater systematic conservation planning
Hermoso López, Virgilio
; Linke, Simon; Prenda Marín, José; Possingham, Hugh (Wiley-Blackwell, 2011)
1. Freshwater conservation has received less attention than its terrestrial or marine counterparts, despite freshwater systems containing a considerable amount of the earth´s biodiversity. Given the accelerated rate of ... -
Análisis de la distribución histórica de la trucha común (Salmo trutta, Linnaeus, 1758) en Andalucía
Sáez Gómez, Pedro (Ríos con vida-AEMS, 2010)
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Análisis retrospectivo de la ictiología europea de aguas continentales
Prenda Marín, José; Granado Lorencio, Carlos (Colegio de Ingenieros de Montes e Ingenieros Técnicos Forestales, 1992)
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Assessing freshwater fish sensitivity to different sources of perturbation in a Mediterranean basin
Hermoso López, Virgilio; Blanco Garrido, Francisco; Clavero Pineda, Miguel; Prenda Marín, José (Wiley-Blackwell Publishing, INC, 2009)
The accuracy of bioassessment programs is highly limited by the precision of the systems used to derive sensitivity-tolerance values for the organisms used as indicators. We provide quantitative support to the objective ... -
Assessing the ecological status in species-poor systems: a fish-based index for Mediterranean Rivers (Guadiana River, SW Spain)
Hermoso López, Virgilio; Clavero Pineda, Miguel; Blanco Garrido, Francisco; Prenda Marín, José (Elsevier, 2011-02-15)
The assessment of the ecological status of freshwater ecosystems is a key issue for many international laws as the Water Framework Directive in light of the actual impoverished status of such ecosystems. Different ... -
Bone length of lberian freshwater fish, as a predictor of length and biomass of prey consumed by piscivores
Prenda Marín, José; Arenas, M. P.; Freitas, D.; Santos Reis, Margarida; Collares Pereira, M. J. (Asociación Ibérica de Limnología, 2002)
We measured various fish bones from 13 Iberian freshwater fish species and one hybrid species. Original total body lengths were then back-calculated using bone measurements. Bones usually found in prey remains left by ... -
Características biológicas y espectro trófico durante el otoño de dos poblaciones simpátricas de "blennius fzuviatilis" y "micropterus salmoides" en un embalse pequeño
Prenda Marín, José; Mellado, Emiliano (Asociación Ibérica de Limnología, 1993)
Therc exist strong differences in size frequency distribution, fecding habits and in habitat use between the populations of "Blennius fluviatilis" and "Micropterus salmoides" coexisting in a small reservoir in NE Spain. ... -
Changes in depth distribution and activity in small benthic riverine fishes under gradually changing light intensities
Prenda Marín, José; Rossomanno, S.; Armitage, Patrick D. (Asociación Ibérica de Limnología, 2000)
Three experiments were performed to determine how changes in light conditions affect the activity patterns of three small benthic fishes (Barbatula barbatula, Gobio gobio and Cottus gobio) and if they had any influence ... -
Conservation of otter (Lutra lutra) in a Mediterranean area: the importance of habitat quality and temporal variation in water availability
This study analyses quantitatively the association between habitat characteristics and annual variation in water availability on otter (Lutra lutra L.) distribution in a large Mediterranean area (13717 km(2)) in ... -
Depredación de Mantis religiosa sobre ranita meridional (Hyla meridionalis) en la reserva biológica de Doñana (Huelva)”
Sáez Gómez, Pedro (Asociación Herpetológica Española, 2007)
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Desenvolvemento sustentable e publicidade
(Xunta de Galicia, 2008) -
Distribución espacial de la Nutria (Lutra lutra, L. 1758) en la provincia de Córdoba en el período 1992-96: el uso de hábitat en relación con la disponibilidad de agua
Bravo Romero, R.; Prenda Marín, José; López Nieves, P. (CUZNA: Revista de Investigación y didáctica en Los Pedroches, 1998)
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Distribution and habitat preferences of the introduced mummichog Fundulus heteroclitus (Linneaus) in southwestern Spain
The distribution and apparent habitat preferences of the common mummichog (Fundulus heteroclitus) in southwestern Spain were examined during summer-fall 1996. This introduced species was more or less continuously distributed ... -
Effect of abiotic stress on the production on lutein and beta-carotene by Chlamydomonas acidophila
Chlamydomonas acidophila growing autotrophically with continuous PAR light (160 µE.m-2.s-1) and 30 ºC may accumulate carotenoids which increase in response to abiotic stress, like high light intensity, UV-A radiation and ... -
Enhanced productivity of a lutein-enriched novel acidophile microalgae grown on urea
Casal Bejarano, Carlos; Cuaresma Franco, María; Vílchez Lobato, Carlos; Vega Piqueres, José María (MDPI, 2011)
Coccomyxa acidophila is an extremophile eukaryotic microalga isolated from the Tinto River mining area in Huelva, Spain. C. acidophila accumulates relevant amounts of b- carotene and lutein, well-known carotenoids with ... -
Fish fauna in Iberian mediterranean river basins : biodiversity, introduced species and damming impacts
We used a basin approximation to analyse distribution patterns of different components of biodiversity (taxonomic richness, endemicity, taxonomic singularity, rarity) and conservation status of freshwater fish fauna in 27 ... -
Habitat use by the fish assemblages of two chalk streams
Patterns of habitat use by fish assemblages in two chalk streams in southern England were examined to identify species preferences with respect to major habitat gradients. Both study sites although differing in some physical ... -
Hydrological stability and otter trophic diversity : a scale-insensitive pattern?
Clavero Pineda, Miguel; Prenda Marín, José; Blanco Garrido, Francisco; Delibes Castro, Miguel (2008)
Two recent works related Eurasian otter (Lutra lutra (L., 1758)) trophic patterns over large areas with the stability of aquatic ecosystems. Higher levels of instability lead to reduced availability and (or) predictability ... -
Identifying priority sites for the conservation of freshwater fish biodiversity in a Mediterranean basin with a high degree of threatened endemics
The Guadiana River basin’s freshwater fish species richness and its threatened status in the circum-mediterranean context highlights the need for a large scale study to identify priority areas for their conservation. One ... -
IM Normae: The Death Spiral of a Cataclysmic Variable?
Patterson, Joseph; Miguel Agustino, Enrique de; Knigge, Christian (American Astronomical Society, 2022-01)
We present a study of the orbital light curves of the recurrent nova IM Normae since its 2002 outburst. The broad “eclipses” recur with a 2.46 hr period, which increases on a timescale of 1.28(16) × 106 yr. Under the ...
