Environmental factors structuring the Fish assemblage distribution and Production potential in Vembanad estuarine system, India

Asha, Chalil Veedu; Cleetus, Retina I.; Suson, P S; Nandan, S. Bijoy

doi:10.5376/ijms.2015.05.0023

Cited by 10 publications

(4 citation statements)

References 33 publications

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“…The Thaneermukkom barrage has affected the production of fish and shrimp from the lagoon but has been successful in keeping the Kuttanad water fresh for agriculture (Varkey et al, 2016). The estimated annual mean fishery catch (provisioning ecosystem service) is 4774.46 t, only 10.1% in the south and 89.9% in the north (Asha et al, 2015). The main commercial species are marine penaeid prawns, clams such as Villorita cyprinoides that represents 70% of the production, cyprinoid fish and Meretrix meretrix (Kumar and Rajan, 2012).…”

Section: Coastal Wetlands In Asia Vembanad Wetlands Indiamentioning

confidence: 99%

Anthropogenic, Direct Pressures on Coastal Wetlands

et al. 2020

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Coastal wetlands, such as saltmarshes and mangroves that fringe transitional waters, deliver important ecosystem services that support human development. Coastal wetlands are complex social-ecological systems that occur at all latitudes, from polar regions to the tropics. This overview covers wetlands in five continents. The wetlands are of varying size, catchment size, human population and stages of economic development. Economic sectors and activities in and around the coastal wetlands and their catchments exert multiple, direct pressures. These pressures affect the state of the wetland environment, ecology and valuable ecosystem services. All the coastal wetlands were found to be affected in some ways, irrespective of the conservation status. The main economic sectors were agriculture, animal rearing including aquaculture, fisheries, tourism, urbanization, shipping, industrial development and mining. Specific human activities include land reclamation, damming, draining and water extraction, construction of ponds for aquaculture and salt extraction, construction of ports and marinas, dredging, discharge of effluents from urban and industrial areas and logging, in the case of mangroves, subsistence hunting and oil and gas extraction. The main pressures were loss of wetland habitat, changes in connectivity affecting hydrology and sedimentology, as well as contamination and pollution. These pressures lead to changes in environmental state, such as erosion, subsidence and hypoxia that threaten the sustainability of the wetlands. There are also changes in the state of the ecology, such as loss of saltmarsh plants and seagrasses, and mangrove trees, in tropical wetlands. Changes in the structure and function of the wetland ecosystems affect ecosystem

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Section: Coastal Wetlands In Asia Vembanad Wetlands Indiamentioning

confidence: 99%

Anthropogenic, Direct Pressures on Coastal Wetlands

et al. 2020

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“…In the southern zone of Vembanad estuary, 67 species of finfishes and 14 species of shell fishes were recorded during 2008-2010 [113]. Among the environmental parameters, variation in fish assemblage, composition and abundance in Vembanad estuarine system the depth, temperature, pH and salinity seemed to be the key factors [114]. Salinity acts as a prime factor influencing the distribution and abundance of organisms in estuaries and many dominant fish species in the pre barrage phase have become a rarity [27] and their distribution pattern was determined by salinity gradient prevailing in the estuary [26].…”

Section: Discussionmentioning

confidence: 99%

Ecosystem analysis of the degrading Vembanad wetland ecosystem, the largest Ramsar site on the South West Coast of India — Measures for its sustainable management

Asha

Retina

Suson

et al. 2016

Regional Studies in Marine Science

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“…Human actions on estuarine habitats can have a direct influence on the distribution, food resources, diversity, reproduction, abundance, growth, survival and behavior of both resident and migratory fish species. The direct and indirect relationship between fish communities and human impacts in estuaries reinforce the choice of this taxonomic group as a biological indicator that can help formulate environmental and ecological quality objectives (Whitfield & Elliott, 2002;Asha, Cleetus, Suson, & Nandan, 2015).…”

Section: Introductionmentioning

confidence: 99%

Temporal variation in composition, abundance and biomass of the fish fauna after impact on subtropical transitional water

Afonso

Cattani

Neto

et al. 2023

Acta Sci. Biol. Sci.

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Transitional waters are characterized by large variations in salinity, temperature, turbidity, among other factors, such as tidal cycle, wind action and rainfall, that are constantly changing over time. The distribution of biota in these environments is regulated by these natural variations and also by human activities, such as pollution, overexploitation of resources, acceleration of urbanization, suppression of habitats and changes in hydrological dynamics. The objective of this study was to analyze the temporal dynamics of the fish fauna of the Saco dos Limões Cove, state of Santa Catarina, Brazil, after the construction of a highway. Fish community was evaluated over five years by annual and monthly variation in species richness, abundance and biomass. A total of 17,993 individuals were collected, distributed in 33 families, 59 genera and 79 species. The evaluated years were similar to each other in species composition. Community descriptors varied over time but did not show seasonal trends. In all years, abundance was higher than biomass, indicating both the disturbance and the ecosystem function as a nursery in the studied area. This was corroborated by the large number of juveniles of dominant species (Genidens genidens, Eucinostomus gula and Eucinostomus argenteus).

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Environmental factors structuring the Fish assemblage distribution and Production potential in Vembanad estuarine system, India

Cited by 10 publications

References 33 publications

Anthropogenic, Direct Pressures on Coastal Wetlands

Anthropogenic, Direct Pressures on Coastal Wetlands

Ecosystem analysis of the degrading Vembanad wetland ecosystem, the largest Ramsar site on the South West Coast of India — Measures for its sustainable management

Temporal variation in composition, abundance and biomass of the fish fauna after impact on subtropical transitional water

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