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Papers by Ana Carolina Labudía

Journal of Marine Systems, 2020

Coastal and estuarine zones are used by fish as nursery, spawning and feeding grounds. However, t... more Coastal and estuarine zones are used by fish as nursery, spawning and feeding grounds. However, these essential habitats are characterized by the presence of both natural and anthropogenic stressors that may represent potential threats for the wellbeing of aquatic organisms, particularly fish. The main objective of this study was to evaluate and understand the effects of environmental stressors, both natural and anthropogenic, on coastal fish species using Ramnogaster arcuata as bioindicator. Fish were captured in two zones with different human activity levels: a highly impacted zone in Bahía Blanca Estuary (BBE) and a lightly impacted zone in the adjacent coastal zone (ACZ). Various indicators were used to determine fish responses to environmental stress. Main differences found between fishes from the two zones were in the condition index, trophic ecology (including feeding activity and diet composition) and liver metabolic biomarkers (ALT/AST enzymes, protein levels and lipid peroxidation). On the other hand, metal concentration levels analyzed in muscle did not show important differences between both environments. Physiological responses of R. arcuata from both zones were strongly correlated with natural stressors.

Chemistry and Ecology, 2019

Metals accumulated in the tissues of organisms inhabiting marine ecosystems generally reflect the... more Metals accumulated in the tissues of organisms inhabiting marine ecosystems generally reflect their bioavailable levels within that environment. The aim of this work was to study the presence and concentration of metals (Cd, Cr, Cu, Fe, Ni, Pb and Zn) and its bioaccumulation in liver-ink sac (n = 12) and muscle (n = 12) tissues of loliginid squids, Loligo sanpaulensis, in liver (n = 15) and muscle (n = 15) tissues of white croakers, Micropogonias furnieri, and in muscle (n = 12) tissues of franciscana dolphins, Pontoporia blainvillei, as representatives of different trophic levels of an estuarial ecosystem from the southern coast of Buenos Aires. Except for Pb, all metals were detectable in the hepatic tissues. Bioaccumulation was observed for Fe, Cr and Ni in muscle of squids. Zn levels in muscle samples increased with the trophic level of the species analysed. Necochea-Quequén presents relatively high levels of Ni and Cr in the tissue samples of squids and fishes given other locations of southern hemisphere, indicating a possible anthropic enrichment. These outcomes provide the necessary basis for the environmental monitoring of an area with relevance for fishing and high anthropic activity.

Environmental Geochemistry and Health, 2018

The Pacific oyster (Crassostrea gigas) is one of the world's most widespread bivalves and a suita... more The Pacific oyster (Crassostrea gigas) is one of the world's most widespread bivalves and a suitable species for biomonitoring metals in coastal environments. In the present research, wild individuals were collected from an Argentinian estuary and the coastal beaches nearby. The concentrations of eight metals (Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) were quantified in the soft tissues of the Pacific oyster. Among the metals, Cu, Fe and Zn reached the highest concentrations in the soft tissues over the rest of the elements. The results showed the highest values to be estuary related, with the beach site achieving the lowest values. These results possibly lie on the impact of human activities surrounding the estuary, as well as streams and rivers that outflow within it. Higher Cu and Zn levels, both port related, were mainly found toward the outer estuary. On the other hand, high levels of Cr, Fe and Mn were found toward the inner zone of the estuary, an area with sewage sludge from the cities located on the margins of the BBE. Regarding the potential risk to public health, Cu and Zn levels found in C. gigas were above national and international safety guidelines in 100% and 11% of the samples, respectively.

de la Guardia/Handbook of Mineral Elements in Food, 2015

During 2015, the global fishery and aquaculture sector showed sustained growth in overall product... more During 2015, the global fishery and aquaculture sector showed sustained growth in overall production and consumption. In 2014, aquaculture's contribution to total fish supplied for food overtook that of wild fish for the first time and this trend continued in 2015. In the same year, after a period of continuous expansion, trade of fish and fishery products declined in value terms. This slowdown was caused by economic contractions in key markets, exchange rate developments and lower fish prices. China, the leading producer, processor and exporter, and the third largest importer of fish and fishery products entered a period of serious uncertainty, even reducing its fish exports due to a slowdown in its processing sector. Seafood consumption in the Russian Federation suffered from the effects of its continuing trade embargo on fish from certain countries. Norway had record total export values, while in Thailand and other large shrimp supplying countries lower shrimp prices pushed total export values down significantly. Catches of anchoveta (mainly used to produce fishmeal and fish oil) were better than expected, relieving some short-term pressure on fishmeal and fish oil prices. Prices of wild species increased more than those of farmed seafood in 2015, as measured by the FAO Fish Price Index (base 2002-04 = 100). Since reaching a peak in March 2014, with the index at 164, overall fish prices have shown a decreasing trend, with the index falling to 135 in July 2015 due to reduced consumer demand in key markets and an increased supply in certain fishery species. During the end of 2015 and early 2016, prices started to slightly recover. Projection highlights The outlook for the fish sector remains largely positive. In nominal terms, average fish prices are all expected to decline in the first part of the projection period before recovering in the last five years of the outlook period. In 2025, average producer prices are projected to be slightly higher than during the 2013-15 base period, as demand growth is expected to outpace supply. However, the average prices for traded products for human consumption, fishmeal and fish oil are projected to be slightly lower in 2025 relative to the base period. In real terms, however, all prices are expected to decrease over the next decade from the record highs attained in 2014. World fish production is projected to grow at 1.5% p.a. during the outlook period, a slowdown relative to the 2.5% p.a. of the previous decade. Production is expected to reach 196 Mt, with an overall increase of 29 Mt, or 17%, between the base period and 2025. Most of the production growth for fish will take place in developing countries and in particular in Asia. As capture fisheries production is expected to increase by only 1%, by 2025, the majority of growth will come from aquaculture, which will surpass total capture fisheries in 2021 (Figure 3.6). Despite the increasing role of aquaculture in total fish supply, the capture sector is expected to remain dominant for a number of species and vital for domestic and international food security.

Journal of Marine Systems, 2020

Coastal and estuarine zones are used by fish as nursery, spawning and feeding grounds. However, t... more Coastal and estuarine zones are used by fish as nursery, spawning and feeding grounds. However, these essential habitats are characterized by the presence of both natural and anthropogenic stressors that may represent potential threats for the wellbeing of aquatic organisms, particularly fish. The main objective of this study was to evaluate and understand the effects of environmental stressors, both natural and anthropogenic, on coastal fish species using Ramnogaster arcuata as bioindicator. Fish were captured in two zones with different human activity levels: a highly impacted zone in Bahía Blanca Estuary (BBE) and a lightly impacted zone in the adjacent coastal zone (ACZ). Various indicators were used to determine fish responses to environmental stress. Main differences found between fishes from the two zones were in the condition index, trophic ecology (including feeding activity and diet composition) and liver metabolic biomarkers (ALT/AST enzymes, protein levels and lipid peroxidation). On the other hand, metal concentration levels analyzed in muscle did not show important differences between both environments. Physiological responses of R. arcuata from both zones were strongly correlated with natural stressors.

Chemistry and Ecology, 2019

Metals accumulated in the tissues of organisms inhabiting marine ecosystems generally reflect the... more Metals accumulated in the tissues of organisms inhabiting marine ecosystems generally reflect their bioavailable levels within that environment. The aim of this work was to study the presence and concentration of metals (Cd, Cr, Cu, Fe, Ni, Pb and Zn) and its bioaccumulation in liver-ink sac (n = 12) and muscle (n = 12) tissues of loliginid squids, Loligo sanpaulensis, in liver (n = 15) and muscle (n = 15) tissues of white croakers, Micropogonias furnieri, and in muscle (n = 12) tissues of franciscana dolphins, Pontoporia blainvillei, as representatives of different trophic levels of an estuarial ecosystem from the southern coast of Buenos Aires. Except for Pb, all metals were detectable in the hepatic tissues. Bioaccumulation was observed for Fe, Cr and Ni in muscle of squids. Zn levels in muscle samples increased with the trophic level of the species analysed. Necochea-Quequén presents relatively high levels of Ni and Cr in the tissue samples of squids and fishes given other locations of southern hemisphere, indicating a possible anthropic enrichment. These outcomes provide the necessary basis for the environmental monitoring of an area with relevance for fishing and high anthropic activity.

Environmental Geochemistry and Health, 2018

The Pacific oyster (Crassostrea gigas) is one of the world's most widespread bivalves and a suita... more The Pacific oyster (Crassostrea gigas) is one of the world's most widespread bivalves and a suitable species for biomonitoring metals in coastal environments. In the present research, wild individuals were collected from an Argentinian estuary and the coastal beaches nearby. The concentrations of eight metals (Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) were quantified in the soft tissues of the Pacific oyster. Among the metals, Cu, Fe and Zn reached the highest concentrations in the soft tissues over the rest of the elements. The results showed the highest values to be estuary related, with the beach site achieving the lowest values. These results possibly lie on the impact of human activities surrounding the estuary, as well as streams and rivers that outflow within it. Higher Cu and Zn levels, both port related, were mainly found toward the outer estuary. On the other hand, high levels of Cr, Fe and Mn were found toward the inner zone of the estuary, an area with sewage sludge from the cities located on the margins of the BBE. Regarding the potential risk to public health, Cu and Zn levels found in C. gigas were above national and international safety guidelines in 100% and 11% of the samples, respectively.

de la Guardia/Handbook of Mineral Elements in Food, 2015

During 2015, the global fishery and aquaculture sector showed sustained growth in overall product... more During 2015, the global fishery and aquaculture sector showed sustained growth in overall production and consumption. In 2014, aquaculture's contribution to total fish supplied for food overtook that of wild fish for the first time and this trend continued in 2015. In the same year, after a period of continuous expansion, trade of fish and fishery products declined in value terms. This slowdown was caused by economic contractions in key markets, exchange rate developments and lower fish prices. China, the leading producer, processor and exporter, and the third largest importer of fish and fishery products entered a period of serious uncertainty, even reducing its fish exports due to a slowdown in its processing sector. Seafood consumption in the Russian Federation suffered from the effects of its continuing trade embargo on fish from certain countries. Norway had record total export values, while in Thailand and other large shrimp supplying countries lower shrimp prices pushed total export values down significantly. Catches of anchoveta (mainly used to produce fishmeal and fish oil) were better than expected, relieving some short-term pressure on fishmeal and fish oil prices. Prices of wild species increased more than those of farmed seafood in 2015, as measured by the FAO Fish Price Index (base 2002-04 = 100). Since reaching a peak in March 2014, with the index at 164, overall fish prices have shown a decreasing trend, with the index falling to 135 in July 2015 due to reduced consumer demand in key markets and an increased supply in certain fishery species. During the end of 2015 and early 2016, prices started to slightly recover. Projection highlights The outlook for the fish sector remains largely positive. In nominal terms, average fish prices are all expected to decline in the first part of the projection period before recovering in the last five years of the outlook period. In 2025, average producer prices are projected to be slightly higher than during the 2013-15 base period, as demand growth is expected to outpace supply. However, the average prices for traded products for human consumption, fishmeal and fish oil are projected to be slightly lower in 2025 relative to the base period. In real terms, however, all prices are expected to decrease over the next decade from the record highs attained in 2014. World fish production is projected to grow at 1.5% p.a. during the outlook period, a slowdown relative to the 2.5% p.a. of the previous decade. Production is expected to reach 196 Mt, with an overall increase of 29 Mt, or 17%, between the base period and 2025. Most of the production growth for fish will take place in developing countries and in particular in Asia. As capture fisheries production is expected to increase by only 1%, by 2025, the majority of growth will come from aquaculture, which will surpass total capture fisheries in 2021 (Figure 3.6). Despite the increasing role of aquaculture in total fish supply, the capture sector is expected to remain dominant for a number of species and vital for domestic and international food security.