Relevant bibliographies by topics / Vatuwaqa River Estuary (Fiji)

Academic literature on the topic 'Vatuwaqa River Estuary (Fiji)'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Vatuwaqa River Estuary (Fiji)"

1

Brown, Kelly T., Johnson Seeto, Monal M. Lal, and Cara E. Miller. "Discovery of an important aggregation area for endangered scalloped hammerhead sharks, Sphyrna lewini, in the Rewa River estuary, Fiji Islands." Pacific Conservation Biology 22, no. 3 (2016): 242. http://dx.doi.org/10.1071/pc14930.

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The scalloped hammerhead shark, Sphyrna lewini, is endangered throughout its global distribution. Management and protection of this species is challenging in many locations because of limited scientific data and the vulnerable life-history traits of the species. Our study investigated anecdotal evidence that the Rewa River estuary in Fiji serves as an important nursery area for this shark. Research findings indicated that the average length of both males (60.6 ± 6.78 cm, n = 31) and females (60.4 ± 6.85 cm, n = 51) was well within published size limits of juvenile S. lewini studied in other locations (range = 38.0–89.5 cm). On the basis of published reference points for umbilical scar status we postulate that the first captured juveniles were born in January of the study year. Stomach content analysis found the following prey items: Decapoda (represented by prawns and shrimps), Stomatopoda, anguilliformes and osteichthyes. Decapods were the most numerous prey item by both count (59.17% of total prey items) and weight (60.25% of total weight). Our study provides strong support that the Rewa River estuary is an important aggregation area for S. lewini in Fiji.
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2

Parać, Marija, Nuša Cukrov, Tomislav Bulat, and Neven Cukrov. "Microplastics assessment in the Krka river estuary surface water." Environmental engineering 9, no. 1-2 (December 20, 2022): 29–34. http://dx.doi.org/10.37023/ee.9.1-2.4.

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Microplastics (MPs), commonly defined as particles less than 5 mm, are a persistent ubiquitous anthropogenic contaminant that can be found in every environment, making it a global environmental, health, and socioeconomic problem. Due to their high surface area, MPs adsorb toxic pollutants that become bioavailable to organisms upon ingestion as they are often mistaken for food leading to biomagnification (Bule et al., 2020). The sampling area represents the lower part of the Krka River Estuary and is under direct anthropogenic influence from the city of Šibenik runoff waters, nautical and communal ports, city harbor, tourism, mariculture, and fishing. Estuaries and harbors have been recognized as hotspots and transfer pathways for MPs primarily because of the vicinity of the urban environment that emits contaminants from various sources (Miller et al., 2021). The main focus of this research was to determine MPs size, shape, color, surface area, and abundance in surface water using volume-reduced samples collected by a net. Laboratory protocol included sieving, wet peroxidation (H2O2), density separation (saturated NaCl solution), sonication, and filtration. Filter papers were then visually inspected for MPs. Image processing and measurements were carried out with ImageJ/Fiji open-source software.
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3

Pearce, Tristan D., Lui Manuel, Javier Leon, Renee Currenti, Matthew Brown, Ilaitia Ikurisaru, Brendan Doran, Halena Scanlon, and James Ford. "Correction to: Mapping Social Values of the Sigatoka River Estuary, Nadroga‑Navosa Province, Viti Levu, Fiji." Human Ecology 49, no. 5 (October 2021): 595. http://dx.doi.org/10.1007/s10745-021-00283-4.

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4

Parać, Marija, Vlado Cuculić, Nuša Cukrov, Sunčana Geček, Marin Lovrić, and Neven Cukrov. "Microplastic Distribution through the Salinity Gradient in a Stratified Estuary." Water 14, no. 20 (October 15, 2022): 3255. http://dx.doi.org/10.3390/w14203255.

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Despite the extensive and rapidly growing literature on microplastics in oceans and coastal seas, little information exists on microplastic distribution through the salinity gradient. This study is the first one to evaluate microplastic distribution through the salinity gradient of a highly stratified estuary. A total of 910 microplastic particles were collected from 12 different sampling events in the Krka River estuary, Croatia. The number of detected particles ranged from 389 in the surface layer to 63 in the deepest marine layer. The highest plastic abundance was found in the surface layer (3.68 particles/m3) and the lowest in the marine layer (0.13 particles/m3). The measured values of the cross-sectional area indicated an ellipsoidal cross-sectional shape of the particles. It was also found that the majority of microplastic particles belonged to the small microplastic class (<1 mm). The Nile Red (NR) staining method was used to visualize fluorescent microplastic particles, while quantification was performed using ImageJ/Fiji software. The strong salinity stratification in the studied estuary did not alter the usual distribution of microplastic particles in the water column, and there was no significant accumulation on the halocline.
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5

Pearce, Tristan D., Lui Manuel, Javier Leon, Renee Currenti, Matthew Brown, Ilaitia Ikurisaru, Brendan Doran, Halena Scanlon, and James Ford. "Mapping Social Values of the Sigatoka River Estuary, Nadroga-Navosa Province, Viti Levu, Fiji." Human Ecology, September 1, 2021. http://dx.doi.org/10.1007/s10745-021-00258-5.

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6

Lal, Praneel Pranesh, Natacha Juste-Poinapen M.S., and Johann Poinapen. "Assessing the water quality of Suva foreshore for the establishment of estuary and marine recreational water guidelines in the Fiji Islands." Water Science and Technology, August 17, 2021. http://dx.doi.org/10.2166/wst.2021.323.

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Abstract The Standards for water quality in Fiji defined in the Environment Management Regulations 2007 only relate to effluent discharge into the environment. Urbanisation is contributing to wastewater contamination in receiving estuary and marine recreational waters, thus requiring specific guidelines. To create a baseline for this, a sampling programme with relevant physico-chemical and biological parameters was implemented at 3 sites along the Suva foreshore, for 8 consecutive months, during low and high tides. Analysis was done in triplicates, using standard methods approved for the examination of water and wastewater. In the absence of relevant Fiji guidelines, the results were compared with ANZECC (2000) guidelines for estuary and marine waters. Low DO levels, high COD, TN, NH3, TP, OP and heavy metal concentrations were measured in all 3 sites. For instance, TN and NH3 concentrations as high as 4.44 ±0.99 mg/L and 2.58 ± 0.89 mg/L respectively were recorded in Wailea river (Site 2). The colony counts for the TC, FC and E. coli were in most cases above the limits. These results confirm that wastewater discharges add to the inherent levels of parameters in receiving water bodies and support the need for specific, robust Fiji standards to better monitor water quality in foreshore areas.
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