Analyses of fish community structure changes in three subtropical estuaries from the Iranian coastal waters

Kamrani, Ehsan; Sharifinia, Moslem; Hashemi, Seyed Hassan

doi:10.1007/s12526-015-0398-5

Cited by 34 publications

(23 citation statements)

References 58 publications

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“…Some of the most important environmental parameters affecting aquatic organisms include temperature, pH, dissolved oxygen (DO) and TSS (Kamrani, Sharifinia, & Hashemi, ). It is often difficult to assess the relative importance of these factors without rather large experiments.…”

Section: Discussionmentioning

confidence: 99%

“…Some of the most important environmental parameters affecting aquatic organisms include temperature, pH, dissolved oxygen (DO) and TSS (Kamrani, Sharifinia, & Hashemi, 2016 higher respiration rate due to activity of the large heterotrophic community and an increase in concentration of carbon dioxide in the system (Khanjani et al, 2016;Tacon et al, 2002;Wasielesky et al, 2006). However, the DO in all treatments was still in an optimal range for the cultivation of Pacific white shrimp.…”

Section: Water Quality Parametersmentioning

confidence: 99%

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Rearing of the Pacific white shrimp, Litopenaeus vannamei in a biofloc system: The effects of different food sources and salinity levels

2019

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The present study assessed the effects of different types of feeds and salinity levels on water quality, growth performance, survival rate and body composition of the Pacific white shrimp, Litopenaeus vannamei, juveniles in a biofloc system. Shrimp juveniles (2.56 ± 0.33 g) were cultured for 35 days in 300 L fibreglass tanks (water volume of 180 L) with a density of 1 g/L in six treatments. Three sources of feed (100% formulated feed, mixture of 66.6% formulated diet and 33.3% wet biofloc, and 100% wet biofloc) and two levels of salinity (10 and 32 ppt) were considered in two control groups and four biofloc treatments. Water quality parameters in the biofloc treatments were significantly better than control groups (p < .05). The highest increase in growth performance and survival rate were obtained in salinity of 32 ppt and mixed feed sources. Analysing the proximate composition of body shrimp indicates an increase in lipid and ash levels in biofloc treatments, which was more evident in the salinity of 32 ppt. In addition, the proximate analysis of shrimp body showed significant differences between biofloc treatments and control groups (p < .05). The highest FCR was found in the treatment with salinity level of 10 ppt and fed only with floc. Overall, it was found that the artificial diet supplemented with biofloc at the salinity of 32 showed better performance in the juvenile stage of Pacific white shrimp.

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Section: Discussionmentioning

confidence: 99%

Section: Water Quality Parametersmentioning

confidence: 99%

Rearing of the Pacific white shrimp, Litopenaeus vannamei in a biofloc system: The effects of different food sources and salinity levels

2019

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“…Estuaries are transition zones between freshwater from rivers and saltwater from the sea, (Ecoutin, Simier, Albaret, Laë, & Tito de Morais, 2010;Kennish, 2004). The interaction of the sea and rivers makes estuaries a complexion of different habitat types, where abrupt variations of salinity, temperature, oxygen, and turbidity exist both in space and time, and where high levels of productivity may occur (Kamrani, Sharifinia, & Hashemi, 2016;Mann, 1982). It is recognized as essential fish habitats and provide a variety of benefits for fish to complete their life cycle, including migration, spawning, breeding, feeding, or growth to maturity (Benaka, 1999;Whitfield, 1998).…”

Section: Introductionmentioning

confidence: 99%

Fish assemblage in the Pearl River Estuary: Spatial‐seasonal variation, environmental influence and trends over the past three decades

et al. 2019

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The Pearl River Estuary is the largest estuary in South China and plays a considerable role in the local fisheries economy, yet little is known about the current state of fish assemblage in this ecosystem. To quantify spatial‐seasonal variations, environmental influences, and trends over the past three decades of the fish assemblage in the Pearl River Estuary, we sampled 11 sites seasonally from December 2013 to September 2016. Throughout the study, 285 species from 88 families and 195 genera were collected. There were obvious spatial and seasonal variations of the fish assemblage in terms of the dominant species, species richness, and composition of ecological types. Mouth distance, NH4+ N, chlorophyll‐a, flow, DO, salinity and water transparency were the main variables influencing the spatial‐temporal dynamic of fishes within the estuarine systems. Compared with the record of 330 species in the 1980s, the number of fish species in the Pearl River Estuary has declined by 45 fish species. The Jaccard's similarity of fish composition between the historical investigation (the 1980's) and the present investigation (2013–2016) was 0.62, with 95 species undiscovered and 50 species increased in the present study compared to the 1980s, indicating the assemblage structure has obviously changed. However, in term of ecological guilds, there was no significant difference in the composition of all the selected ecological traits between these two periods. Anthropogenic activities including overfishing, introducing alien fish, dam construction and pollution were considered the main disturbance on fish composition over the past three decades. We conclude that there existed pronounced spatiotemporal changes of fish assemblages, which arises from the compounding effects of environmental factors and anthropogenic activities. These findings are beneficial to understanding and developing suitable conservation strategies for the management and protection of fish resources in the Pearl River Estuary.

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“…The Persian Gulf is facing with many threats resulting from natural changes and anthropogenic pressures. Marine species diversity, ecosystem health, and fisheries are currently threatened by multiple stressors such as industrial effluents, reclamation and dredging, oil pollution, overfishing, and other natural and anthropogenic factors (Figure ; Daliri, Kamrani, Jentoft, & Paighambari, ; Kamrani, Sharifinia, & Hashemi, ; Sharifinia, Daliri, & Kamrani, ; Sharifinia, Taherizadeh, Namin, & Kamrani, ). Despite the potential effects of DPs on marine ecosystems and their services, there is a lack of research on the impact of brine discharges from DPs on Persian Gulf biodiversity.…”

Section: Introductionmentioning

confidence: 99%

“…The main threats to biodiversity in the Persian Gulf (Daliri et al, ; Kamrani et al, ; Sharifinia et al, , , ) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Introductionmentioning

confidence: 99%

Prevention is better than cure: Persian Gulf biodiversity vulnerability to the impacts of desalination plants

Sharifinia

Bahmanbeigloo

Smith

et al. 2019

Global Change Biology

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Due to extremely high rates of evaporation and low precipitation in the Persian Gulf, discharges from desalination plants (DPs) can lead to ecological stresses by increasing water temperatures, salinities, and heavy metal concentrations, as well as decreasing dissolved oxygen levels. We discuss the potential ecological impacts of DPs on marine organisms and propose mitigating measures to reduce the problems induced by DPs discharges. The daily capacity of DPs in the Persian Gulf exceeds 11 million m3 per day, which is approximately half of global daily freshwater production; multistage flash distillation (MSF) is the dominant desalination process. Results from field and laboratory studies indicate that there are potentially serious and chronic threats to marine communities following exposure to DP discharges, especially within the zoobenthos, echinodermata, seagrasses, and coral reefs. DP discharges can lead to decreases in sensitive species, plankton abundance, hard substrate epifauna, and growth rates of seagrasses. However, the broad applicability of any one of these impacts is currently hard to scale because of the limited number of studies that have been conducted to assess the ecological impacts of DP discharge on Persian Gulf organisms. Even so, available data suggest that appropriately sited, designed, and operated DPs combined with current developments in impingement and entrainment reduction technology can mitigate many of the negative environmental impacts of DPs.

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Analyses of fish community structure changes in three subtropical estuaries from the Iranian coastal waters

Cited by 34 publications

References 58 publications

Rearing of the Pacific white shrimp, Litopenaeus vannamei in a biofloc system: The effects of different food sources and salinity levels

Rearing of the Pacific white shrimp, Litopenaeus vannamei in a biofloc system: The effects of different food sources and salinity levels

Fish assemblage in the Pearl River Estuary: Spatial‐seasonal variation, environmental influence and trends over the past three decades

Prevention is better than cure: Persian Gulf biodiversity vulnerability to the impacts of desalination plants

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