Graciela Gómez Nicola | University of Castilla-La Mancha (original) (raw)
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Papers by Graciela Gómez Nicola
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Transactions of the American Fisheries Society, 2006
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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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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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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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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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Transactions of the American Fisheries Society, 2004
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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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River Research and Applications, 2009
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River Research and Applications, 2010
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Regulated Rivers: Research & Management, 1999
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Oecologia, 2009
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Journal of Fish Biology, 2001
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Journal of Fish Biology, 2009
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Italian Journal of Zoology, 1998
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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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Freshwater Biology, 2006
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Freshwater Biology, 2008
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Freshwater Biology, 2002
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Transactions of the American Fisheries Society, 2006
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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
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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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.
Bookmarks Related papers MentionsView impact
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
Transactions of the American Fisheries Society, 2004
Bookmarks Related papers MentionsView impact
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
River Research and Applications, 2009
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River Research and Applications, 2010
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Regulated Rivers: Research & Management, 1999
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Oecologia, 2009
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Journal of Fish Biology, 2001
Bookmarks Related papers MentionsView impact
Journal of Fish Biology, 2009
Bookmarks Related papers MentionsView impact
Italian Journal of Zoology, 1998
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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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Freshwater Biology, 2006
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Freshwater Biology, 2008
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Freshwater Biology, 2002
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