Ichthyofauna as bioindicator of environmental quality in an industrial district in the amazon estuary, Brazil

Abstract

The objective of the present study was to describe the ecological status of ichthyofauna in an industrial district (Pará river, Amazon estuary), through the use of different environmental descriptors. To evaluate the impacts of the industrial area and cargo terminal, three areas were considered: Zone 1 (maximum impact), Zone 2 (median impact) and Zone 3 (low impact). A total of 77 species were captured. Differences in the composition of the ichthyofauna were recorded between Zones and environments (main channel and tidal channel). The ecological indices revealed clear evidence of the impact of the industrial hub and cargo terminal on the fish communities. In Zone 1, there was a reduction in the number of feeding groups (in the main channel) and larger fish and the Shannon diversity index and Margalef's richness were also significantly lower. The multivariate analysis separated the different Zones clearly into three groups, indicating marked differences in the levels of contamination in the different parts of the study area.Keywords: community fish, habitat use, Pará River, industrial hub. Ictiofauna com indicador biológico estuarino em um distrito industrial, estuário amazônico, BrasilResumo O objetivo deste trabalho foi descrever o status ecológico da ictiofauna em um distrito industrial (rio Pará, estuário Amazônico), através do uso de diferentes descritores ambientais. Para avaliar o impacto da zona industrial e terminal de cargas, três áreas foram consideradas: Zona 1 (máximo impacto), Zona 2 (médio risco) e Zona 3 (baixo impacto). Um total de 77 espécies foi capturado. Diferenças na composição da ictiofauna foram encontradas em todas as zonas e ambientes (canal principal e canal de maré). Os índices ecológicos revelaram alterações da comunidade de peixes na área do distrito industrial. Na Zona 1 houve uma redução no número de categorias tróficas (no canal principal) e de peixes de grande porte e o índice de diversidade de Shannon e a riqueza de Margalef foram significativamente mais baixos. A análise multivariada separou as Zonas em três grupos, indicando diferenças marcantes no nível de contaminação nas diferentes áreas de estudo.Palavras-chave: comunidade de peixe, uso do habitat, Rio Pará, área industrial.

Fish Fauna Faces Anthropogenic Double Trouble: Erosion of Fish Diversity in Tropical Oxbow Lake of the Ganga River Basin in Eastern India

“…Low native fish diversity indices are pointers to poor ecosystem health status owing to intense adverse activities like jute retting, indiscriminate fishing aggravated by influx of turbid water from the river Ganga following episodic flood events during monsoon. The present findings on fish SWI and Simpson diversity values showed quite similarity with other studies [9,[13][14][15][16][17]19,21,24,25,45], in contrast with other studies [18,20,22,23,26,27].…”

“…Riverine and Oxbow lake ecosystems have suffered from intense human intervention resulting in habitat loss and degradation over the last century and as a consequence, many fish species have become highly endangered. Studies have been limited to scattered works on commercial fisheries [2][3][4][5][6][7][8][9][10][11], based on catch data of some major groups largely restricted to some of the major river systems [1,12]. Various fish diversity indices are reported in several studies [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

Bioaccumulation of Metals/Metalloids and Histological and Immunohistochemical Changes in the Tissue of the European Hake, Merluccius merluccius (Linnaeus, 1758) (Pisces: Gadiformes: Merlucciidae), for Environmental Pollution Assessment

“…They lend themselves to a study in the field of environmental protection, also aimed at protecting the human being as a user, direct and indirect, of the resources that natural ecosystems can offer. However, also the investigation of ecological indices represents a good method for the monitoring of the environmental quality [39] and these types of studies should be associated to the bioaccumulation studies for a more complete and wide point of view.…”

Effect of cadmium on glycogen content in muscle, liver, gill and kidney tissues of freshwater fish Channa punctatus (Bloch)

“…Effluents from such activities are a source of cadmium into aquatic environment. Fish, as they come into intimate contact with large amounts of polluted water can be used as early warning biological indicators of polluted environment (Viana and Lucena Frédou, 2014;Plessl et al, 2017).…”