Dams and Reservoirs, Societies and Environment in the 21st Century, Two Volume Set

Berga, L; Buil, J; Bofill, E; De, J; Pérez, José Martín Medina; Mañueco, G; Polimon, J; Soriano, A; Yagüe, Juan Carlos Bravo

doi:10.1201/b16818

Cited by 32 publications

(11 citation statements)

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“…Heavy metals are natural trace elements of the aquatic environment, but their levels have increased due to industrial, mining, domestic and agricultural activities (Kalay and Canli, 2000). Owing to their toxicity and cumulative effect, discharge of heavy metals into the aquatic environments can alter the diversity of aquatic species and ecosystems (Berga, 2006). Aquatic organisms (such as fish and shell fish) accumulate heavy metals concentrations many times higher than what is present in water or sediment (Olaifa et al, 2004;George et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Determination of heavy metal levels in Oreochromis niloticus and Chrysichthys nigrodigitatus from Ogun River, Nigeria

Fafioye¹,

Oladunjoye²,

Bamidele³

et al. 2017

Int. J. Fish. Aquac.

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Comparison of heavy metal levels in Oreochromis niloticus and Chrysichthys nigrodigitatus caught inOgun River (Nigeria) was carried out to reveal the potential health risks associated with fish consumption from the river. Concentrations of copper, lead and cadmium were determined in the gills, eyes, bone, flesh, liver and stomach of the fish species. Ten fish of each species were obtained commercially and analyzed for the metals using Atomic Absorption Spectrophotometer. Data obtained were subjected to one-way analysis of variance (ANOVA) at 5% significant level. The highest concentrations of Cu were observed in the gills of O. niloticus and the eyes followed by liver of C. nigrodigitatus, while the lowest concentrations were detected in the eyes of O. niloticus and bone of C. nigrodigitatus. Lead concentrations were higher in the liver of O. niloticus and gills of C. nigrodigitatus, while the lowest concentrations were detected in stomach of O. niloticus and C. nigrodigitatus respectively. Also, in proximate analysis, composition of dry matter, crude protein, crude fat, ash and carbohydrate contents recorded high in C. nigrodigitatus and O. niloticus and significantly differs. All the metals studied exceeded standard permissible limit for human consumption. Therefore, monitoring of the river is highly recommended, while adequate information, education and training should be strengthened to control further pollution.

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Section: Introductionmentioning

confidence: 99%

Determination of heavy metal levels in Oreochromis niloticus and Chrysichthys nigrodigitatus from Ogun River, Nigeria

Fafioye¹,

Oladunjoye²,

Bamidele³

et al. 2017

Int. J. Fish. Aquac.

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“…The issue is particularly relevant for rivers, which make up only 0.0002% of water on Earth (1) but support more than 40% of the world's human population (2,3). River regulation to meet society's needs has accelerated in the past two centuries (4), leaving over half of the world's major rivers now fragmented by >50,000 large dams providing water, energy, flood control, and transportation (3,5,6). The demand for large hydropower continues, spurred by the need for economic development while limiting carbon use (7).…”

mentioning

confidence: 99%

Fish navigation of large dams emerges from their modulation of flow field experience

Goodwin

Politano²,

Garvin

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

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Navigating obstacles is innate to fish in rivers, but fragmentation of the world's rivers by more than 50,000 large dams threatens many of the fish migrations these waterways support. One limitation to mitigating the impacts of dams on fish is that we have a poor understanding of why some fish enter routes engineered for their safe travel around the dam but others pass through more dangerous routes. To understand fish movement through hydropower dam environments, we combine a computational fluid dynamics model of the flow field at a dam and a behavioral model in which simulated fish adjust swim orientation and speed to modulate their experience to water acceleration and pressure (depth). We fit the model to data on the passage of juvenile Pacific salmonids (Oncorhynchus spp.) at seven dams in the Columbia/Snake River system. Our findings from reproducing observed fish movement and passage patterns across 47 flow field conditions sampled over 14 y emphasize the role of experience and perception in the decision making of animals that can inform opportunities and limitations in living resources management and engineering design.

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“…This global impact is pervasive and massive, given that there are more than 50,000 dams over 15 meters in height around the world (Berga et al 2006). While dams provide value as a source of national pride or symbols of development, the practical reasons to build dams are quite diverse and include flood control, irrigation, power generation, urban drinking water supplies, recreation or a combination two or more of these reasons.…”

Section: Riverine Processes In Sarawakmentioning

confidence: 99%

Narratives about Energy, Megaprojects, and the Ecology of Tropical Rivers: The Baram River Dam Project

Huertos¹

2017

envirolabasia

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Dams and Reservoirs, Societies and Environment in the 21st Century, Two Volume Set

Cited by 32 publications

References 0 publications

Determination of heavy metal levels in Oreochromis niloticus and Chrysichthys nigrodigitatus from Ogun River, Nigeria

Determination of heavy metal levels in Oreochromis niloticus and Chrysichthys nigrodigitatus from Ogun River, Nigeria

Fish navigation of large dams emerges from their modulation of flow field experience

Narratives about Energy, Megaprojects, and the Ecology of Tropical Rivers: The Baram River Dam Project

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