Graciela Gómez Nicola | University of Castilla-La Mancha (original) (raw)

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Papers by Graciela Gómez Nicola

Research paper thumbnail of esa

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Research paper thumbnail of GROWTH OF STREAM-DWELLING BROWN TROUT IN CENTRAL SPAIN: LINKING LIFE-HISTORY AND MANAGEMENT

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Research paper thumbnail of Spatial Variation in Brown Trout Production: The Role of Environmental Factors

Transactions of the American Fisheries Society, 2006

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Research paper thumbnail of Effects of a bloom of Planktothrix rubescens on the fish community of a Spanish reservoir

During the spring of 2000 and 2001 there were two cyanobacterial bloom episodes in El Atazar rese... more During the spring of 2000 and 2001 there were two cyanobacterial bloom episodes in El Atazar reservoir (central Spain). They were attributed to the toxic cyanobacteria Planktothrix rubescens. The goal of the present study was to determine the possible effects and toxicity of these blooms on the fish community of the reservoir. The main objectives were to analyse the presence

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Research paper thumbnail of Expansión del alburno Alburnus alburnus (Linnaeus, 1758) (Actinopterygii, Cyprinidae) en la península Ibérica: el papel de los embalses

Since its first record in a tributary of the Ebro basin in 1992, the bleak Alburnus alburnus has ... more Since its first record in a tributary of the Ebro basin in 1992, the bleak Alburnus alburnus has spread to almost the whole Iberian Peninsula. In this paper (based on electrofishing surveys in 598 localities), we provide information on the expansion of the bleak. We detail current distribution in the Ebro basin and the rivers of the Eastern Pyrenees and we report its presence in three other major Iberian drainages. Currently, the bleak is sympatric with 15 Iberian endemic species (58% of total Iberian endemic fish). The possible threats to the rich Iberian ichthyofauna caused by the presence of the bleak are discussed. The factors that promoted the extremely rapid expansion of this exotic cyprinid are examined, focusing on the role of reservoirs, which seem to favour its dispersal.Desde su aparición en un afluente de la cuenca del Ebro en 1992, el alburno Alburnus alburnus se ha expandido en gran parte de la península Ibérica. El presente trabajo aporta nueva información sobre su ex...

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Research paper thumbnail of Spread of the alien bleak Alburbus alburnus (Linnaeus, 1758) (Actinopterygii, Cyprinidae) in the Iberian Peninsula: the role of reservoirs

Since its first record in a tributary of the Ebro basin in 1992, the bleak Alburnus alburnus has ... more Since its first record in a tributary of the Ebro basin in 1992, the bleak Alburnus alburnus has spread to almost the whole Iberian Peninsula. In this paper (based on elec-trofishing surveys in 598 localities), we provide information on the expansion of the bleak. We detail current distribution in the Ebro basin and the rivers of the Eastern Pyrenees and we report its presence in three other major Iberian drainages. Currently, the bleak is sympatric with 15 Iberian endemic species (58% of total Iberian endemic fish). The possible threats to the rich Iberian ichthyofauna caused by the presence of the bleak are discussed. The factors that promoted the extremely rapid expansion of this exotic cyprinid are examined, focusing on the role of reservoirs, which seem to favour its dis-persal.

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Research paper thumbnail of Trophic plasticity of invasive juvenile largemouth bass Micropterus salmoides in Iberian streams

Fisheries Research, 2000

Biological invasions are a major factor for biodiversity loss, particularly in freshwater environ... more Biological invasions are a major factor for biodiversity loss, particularly in freshwater environments. Largemouth bass Micropterus salmoides is native to North America and is invasive on the Iberian Peninsula, primarily to provide angling opportunities in reservoirs. However, this species is a threat to the endemic Iberian fauna via predation and competition. Currently, there is little information on largemouth bass in

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Research paper thumbnail of Growth Pattern of Stream-Dwelling Brown Trout under Contrasting Thermal Conditions

Transactions of the American Fisheries Society, 2004

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Research paper thumbnail of Evaluation of PCBs and DDTs in endemic Iberian barbel Barbus bocagei (Steindachner, 1864) populations

Science of The Total Environment, 2014

PCB and DDT levels were evaluated in populations of endemic Iberian barbel (Barbus bocagei) in th... more PCB and DDT levels were evaluated in populations of endemic Iberian barbel (Barbus bocagei) in the Jarama River in Spain via a pollution gradient from well-preserved areas upstream to contaminated downstream areas. Age structure, abundance, recruitment and levels of morphological abnormalities and ectoparasites were assessed. Upstream to downstream PCB concentrations ranged from 3.4 to 101.4 ng/g (ww) and from 0.9 to 19.6 ng/g ww for DDTs. The PCB pattern was dominated by the PCB 153, 138 and 180 congeners, and the less chlorinated ones had a relatively high contribution upstream. Barbels exposed to low PCB and DDT levels had a well-balanced population with a predominant cohort of young fish, indicating good recruitment. The most contaminated sites displayed a disrupted age distribution, where the proportion of young fish was clearly under-represented. Recruitment and total density of barbel populations decreased downstream where the highest PCB and DDT levels were found. In addition, a higher incidence of abnormalities and ectoparasites was observed at these sites. High concentrations of PCBs and DDTs most likely contribute to the reduction of Iberian barbel reproductive performance in the most contaminated sites, as shown by the disrupted age-distribution found in our study.

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Research paper thumbnail of Interactive effects of cover and hydraulics on brown trout habitat selection patterns

River Research and Applications, 2009

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Research paper thumbnail of Modelling brown trout spatial requirements through physical habitat simulations

River Research and Applications, 2010

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Research paper thumbnail of Effects of a small hydropower station upon brown troutSalmo trutta L. in the River Hoz Seca (Tagus basin, Spain) one year after regulation

Regulated Rivers: Research & Management, 1999

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Research paper thumbnail of Influence of hydrologic attributes on brown trout recruitment in low-latitude range margins

Oecologia, 2009

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Research paper thumbnail of Genetic introgression between wild and stocked brown trout in the Douro River basin, Spain

Journal of Fish Biology, 2001

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Research paper thumbnail of Latitudinal and altitudinal growth patterns of brown trout Salmo trutta at different spatial scales

Journal of Fish Biology, 2009

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Research paper thumbnail of Assessment of a brown trout Salmo trutta population in the River Gallo (central Spain): Angling effects and management implications (Salmonidae)

Italian Journal of Zoology, 1998

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Research paper thumbnail of What is wrong with current translocations? A review and a decision-making proposal

Frontiers in Ecology and the Environment, Oct 16, 2012

Should a species be translocated? Uncertainty regarding the necessity and feasibility of many tra... more Should a species be translocated? Uncertainty regarding the necessity and feasibility of many translocations complicates answering this question. Here, we review translocation projects, both published and unpublished. Our results indicate that most projects (1) addressed fewer than half of the basic criteria established for translocations and (2) were either unjustifiable from a conservation perspective or inadequately designed to guarantee success or preclude negative consequences. We propose a hierarchical decision-making ...

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Research paper thumbnail of Introgression variability among Iberian brown trout Evolutionary Significant Units: the influence of local management and environmental features

Freshwater Biology, 2006

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Research paper thumbnail of Recruitment variability of resident brown trout in peripheral populations from southern Europe

Freshwater Biology, 2008

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Research paper thumbnail of Reproductive traits of stream-dwelling brown trout Salmo trutta in contrasting neighbouring rivers of central Spain

Freshwater Biology, 2002

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Research paper thumbnail of esa

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Research paper thumbnail of GROWTH OF STREAM-DWELLING BROWN TROUT IN CENTRAL SPAIN: LINKING LIFE-HISTORY AND MANAGEMENT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Spatial Variation in Brown Trout Production: The Role of Environmental Factors

Transactions of the American Fisheries Society, 2006

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Research paper thumbnail of Effects of a bloom of Planktothrix rubescens on the fish community of a Spanish reservoir

During the spring of 2000 and 2001 there were two cyanobacterial bloom episodes in El Atazar rese... more During the spring of 2000 and 2001 there were two cyanobacterial bloom episodes in El Atazar reservoir (central Spain). They were attributed to the toxic cyanobacteria Planktothrix rubescens. The goal of the present study was to determine the possible effects and toxicity of these blooms on the fish community of the reservoir. The main objectives were to analyse the presence

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Expansión del alburno Alburnus alburnus (Linnaeus, 1758) (Actinopterygii, Cyprinidae) en la península Ibérica: el papel de los embalses

Since its first record in a tributary of the Ebro basin in 1992, the bleak Alburnus alburnus has ... more Since its first record in a tributary of the Ebro basin in 1992, the bleak Alburnus alburnus has spread to almost the whole Iberian Peninsula. In this paper (based on electrofishing surveys in 598 localities), we provide information on the expansion of the bleak. We detail current distribution in the Ebro basin and the rivers of the Eastern Pyrenees and we report its presence in three other major Iberian drainages. Currently, the bleak is sympatric with 15 Iberian endemic species (58% of total Iberian endemic fish). The possible threats to the rich Iberian ichthyofauna caused by the presence of the bleak are discussed. The factors that promoted the extremely rapid expansion of this exotic cyprinid are examined, focusing on the role of reservoirs, which seem to favour its dispersal.Desde su aparición en un afluente de la cuenca del Ebro en 1992, el alburno Alburnus alburnus se ha expandido en gran parte de la península Ibérica. El presente trabajo aporta nueva información sobre su ex...

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Research paper thumbnail of Spread of the alien bleak Alburbus alburnus (Linnaeus, 1758) (Actinopterygii, Cyprinidae) in the Iberian Peninsula: the role of reservoirs

Since its first record in a tributary of the Ebro basin in 1992, the bleak Alburnus alburnus has ... more Since its first record in a tributary of the Ebro basin in 1992, the bleak Alburnus alburnus has spread to almost the whole Iberian Peninsula. In this paper (based on elec-trofishing surveys in 598 localities), we provide information on the expansion of the bleak. We detail current distribution in the Ebro basin and the rivers of the Eastern Pyrenees and we report its presence in three other major Iberian drainages. Currently, the bleak is sympatric with 15 Iberian endemic species (58% of total Iberian endemic fish). The possible threats to the rich Iberian ichthyofauna caused by the presence of the bleak are discussed. The factors that promoted the extremely rapid expansion of this exotic cyprinid are examined, focusing on the role of reservoirs, which seem to favour its dis-persal.

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Research paper thumbnail of Trophic plasticity of invasive juvenile largemouth bass Micropterus salmoides in Iberian streams

Fisheries Research, 2000

Biological invasions are a major factor for biodiversity loss, particularly in freshwater environ... more Biological invasions are a major factor for biodiversity loss, particularly in freshwater environments. Largemouth bass Micropterus salmoides is native to North America and is invasive on the Iberian Peninsula, primarily to provide angling opportunities in reservoirs. However, this species is a threat to the endemic Iberian fauna via predation and competition. Currently, there is little information on largemouth bass in

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Growth Pattern of Stream-Dwelling Brown Trout under Contrasting Thermal Conditions

Transactions of the American Fisheries Society, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Evaluation of PCBs and DDTs in endemic Iberian barbel Barbus bocagei (Steindachner, 1864) populations

Science of The Total Environment, 2014

PCB and DDT levels were evaluated in populations of endemic Iberian barbel (Barbus bocagei) in th... more PCB and DDT levels were evaluated in populations of endemic Iberian barbel (Barbus bocagei) in the Jarama River in Spain via a pollution gradient from well-preserved areas upstream to contaminated downstream areas. Age structure, abundance, recruitment and levels of morphological abnormalities and ectoparasites were assessed. Upstream to downstream PCB concentrations ranged from 3.4 to 101.4 ng/g (ww) and from 0.9 to 19.6 ng/g ww for DDTs. The PCB pattern was dominated by the PCB 153, 138 and 180 congeners, and the less chlorinated ones had a relatively high contribution upstream. Barbels exposed to low PCB and DDT levels had a well-balanced population with a predominant cohort of young fish, indicating good recruitment. The most contaminated sites displayed a disrupted age distribution, where the proportion of young fish was clearly under-represented. Recruitment and total density of barbel populations decreased downstream where the highest PCB and DDT levels were found. In addition, a higher incidence of abnormalities and ectoparasites was observed at these sites. High concentrations of PCBs and DDTs most likely contribute to the reduction of Iberian barbel reproductive performance in the most contaminated sites, as shown by the disrupted age-distribution found in our study.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Interactive effects of cover and hydraulics on brown trout habitat selection patterns

River Research and Applications, 2009

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Modelling brown trout spatial requirements through physical habitat simulations

River Research and Applications, 2010

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Effects of a small hydropower station upon brown troutSalmo trutta L. in the River Hoz Seca (Tagus basin, Spain) one year after regulation

Regulated Rivers: Research & Management, 1999

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Influence of hydrologic attributes on brown trout recruitment in low-latitude range margins

Oecologia, 2009

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Genetic introgression between wild and stocked brown trout in the Douro River basin, Spain

Journal of Fish Biology, 2001

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Latitudinal and altitudinal growth patterns of brown trout Salmo trutta at different spatial scales

Journal of Fish Biology, 2009

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Assessment of a brown trout Salmo trutta population in the River Gallo (central Spain): Angling effects and management implications (Salmonidae)

Italian Journal of Zoology, 1998

Bookmarks Related papers MentionsView impact

Research paper thumbnail of What is wrong with current translocations? A review and a decision-making proposal

Frontiers in Ecology and the Environment, Oct 16, 2012

Should a species be translocated? Uncertainty regarding the necessity and feasibility of many tra... more Should a species be translocated? Uncertainty regarding the necessity and feasibility of many translocations complicates answering this question. Here, we review translocation projects, both published and unpublished. Our results indicate that most projects (1) addressed fewer than half of the basic criteria established for translocations and (2) were either unjustifiable from a conservation perspective or inadequately designed to guarantee success or preclude negative consequences. We propose a hierarchical decision-making ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Introgression variability among Iberian brown trout Evolutionary Significant Units: the influence of local management and environmental features

Freshwater Biology, 2006

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Recruitment variability of resident brown trout in peripheral populations from southern Europe

Freshwater Biology, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Reproductive traits of stream-dwelling brown trout Salmo trutta in contrasting neighbouring rivers of central Spain

Freshwater Biology, 2002

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