The white shrimp Litopenaeus schimitti is the main way of living for artisanal fishermen who use the gerival for their capture in one of the main estuaries off south Brazil: Babitonga Bay. The abundance of the species is regulated by closed fishing seasons to protect spawning and recruitment, which may not in accordance with species’ life cycle. The present study evaluated the size structure, maturation

The present study used mitochondrial DNA control region to investigate the genetic stock structure and phylogenetic relationship of 38 samples of Narrow-barred Spanish mackerel Scomberomorus commerson (Lacépède, 1800) from two sites (Dar es Salaam and Pangani) located along the northern Tanzanian coastal waters. The study revealed that the Narrow-barred Spanish mackerel were characterized by high levels

This study is guided by other classifications of estuaries that are based on specified physical constraints. Previous classifications have been relevant and revealing of diagnostic functioning of estuaries in terms of their stratification and their baroclinically induced residual circulation. Those classifications, however, have disregarded residual circulations driven by tides, not only in estuaries

The Golden Horn estuary, which is located along the Sea of Marmara adjacent to the center of Istanbul, has been heavily polluted for centuries due to concentrated shipping activities, and a legacy of industrial and municipal discharges. The municipalities and associated governments have implemented environmental rehabilitation projects for 30 years. However, the Golden Horn estuary is still exposed

Over the last few decades, anthropogenic activities have triggered the rate of change in the function of mangrove ecosystems in coastal urban areas. Satellite imagery provides valuable information for mangrove mapping and monitoring. Metrics derived from the linear regression analysis of spectral indices (SIs) derived from satellites are commonly used for change analysis. This study examines the robustness

Each food form is considered to have greater affinity if enriched with nutritional and bioactive compounds. This study was undertaken to evaluate the bioactive compounds, antioxidant properties, and proximate composition of two seaweeds i.e., Hypnea musciformis and Gelidium pusillum and a freshwater weed i.e., Ipomoea aquatica, in search of potential plant food sources with greater medicinal values

A field research was undertaken to investigate the effects of saltmarsh restoration and some eco-engineering activities on the climate change impact mitigation and community adaptation in the coastal environment of Sonadia Island, Cox’s Bazar, Bangladesh. Two research sites viz., saltmarsh restoration site (SMRS) and impacted site (IP) were selected for this study. Amount of carbon assimilation by

Uroteuthis edulis (U. edulis) is a commercially important cephalopod species widely distributed in the coastal waters of China. It has multiple cohorts and migration habits. Migration habits are important features in cephalopods’ life history. Trace elements derived from hard structures have been proved as a useful tool to study cephalopods. In this study, the statolith trace elements of spring and

Disentangling the effects of fishing and the environment on fish abundance and distribution is essential for informing future fisheries management measures. Fishery-independent trawl survey data (8 years data between 1999 and 2016) were examined to test influences of fishing effort and environmental variables (temperature, oxygen salinity) on the spatial distribution of two species groups (5 economically

The annual fishery of the Indian Oil Sardine (IOS), Sardinella longiceps, seems to be influenced by the ambient conditions prevailing in the habitats during their early life-history. The present study is aimed at understanding the putative behaviour of IOS along the southwest coast of India (SWCI) to monsoonal upwelling which triggers surface productivity. Mixed layer temperature is observed to be

Sediment, soil and fish samples collected from the Songor Wetland were assessed for the spatial distributions of metal (Al, Fe, Zn, Cr, Ni, Cu, Pb, As, Cd and Hg) levels and contamination loads, using pollution indices and multivariate analysis. The samples were processed through microwave digestions (Soil and Sediment: [HNO3, HCl, HF, H2O2]; Fish: [HNO3, H2O2]), followed by the analysis of extracts

The hydraulic geometry of tidal inlets, like, cross-sectional area, wetted perimeter and hydraulic gradient is controlled by the dynamics of tides and wave-induced littoral drift along coastlines, pushing materials into the inlet during the flood tide and flushing them out during the ebb tide. An inlet which maintains its hydraulic stability has its velocity so adjusted that it can flush out all the

Individual growth parameters of blue abalone and yellow abalone were estimated through length-frequency analysis using biometric data from bank surveys conducted by the National Fisheries Institute from 1998 to 2018. The growth parameters calculated by the von Bertalanffy equation are as follows: Haliotis corrugata (K=0.362 yr-1, L∞=150.5 mm and t0= -0.10 mm) and Haliotis fulgens (K=0.305 yr-1, L∞=163

Co-management of a system or resource should be understood as an approach to governance in which there is some redistribution of power between the state and a community of users. Despite its potential utility, its application in traditional, hierarchically complex systems faces social challenges that impede self-organization and/or self-management. In a new attempt to promote the sustainability of

Marine mammals are exceptionally significant animals with innumerable essential ecological roles in global aquatic ecosystems while the evolutionary divergence was taken place from the terrestrial habits. The adaptive radiation in aquatic life endorses various structural modifications in their general organization of body plan. Short-finned Pilot Whales (Globicephala macrorhynchus Gray, 1846) are predominantly

A development site in Baja California Sur Mexico is the Bay of Loreto, an emblematic place with fishing tradition and huge touristic potential. To provide useful information which can be used to improve the economic development policies of the municipality and the management plan of Loreto Bay National Park, this study characterized the fishing activity based on records, statistics from 2000 to 2016

Oil and petroleum products are among the most common pollutants in the marine environment. One of the main difficulties in interpreting oil pollution data for the seas, especially in cases of low concentrations, is the natural biogenic origin of many hydrocarbons which are typical for the chemical composition of oil. The aim of the work was to determine the total content, distribution and main sources

In an effort to assess the coastal water quality in an Algerian Bay, suspended particulate matter (SPM) was analyzed for trace metals and various environmental parameters in Bou Ismail Bay. The trace metal concentrations analyzed by absorption atomic spectrometry followed the decreasing order Al > Fe > Zn > Mn > Ni > Cu > Pb > Co > Cr > Cd > Hg > As (p<0.001). To assess risk, a multiple risk assessment

Canavalia rosea, a perennial vine of the legume (Fabaceae) family, is commonly found in the tropical and subtropical coasts of the world. The long-distance dispersal ability of its sea-drifted seeds has aided the species to attain a pantropical distribution. While there has been some progress on its global phylogeography, the influence of evolutionary mechanisms on the genetic composition of C. rosea

Socio-economic development activities have significantly affected biodiversity of seagrass beds in the coastal lagoon areas in central Vietnam. This study was carried out to investigate the major past and potential impacts on seagrass changes in Lang Co lagoon. In this study, historical satellite remote sensing data and GIS technology were used to evaluate the variation of seagrass beds during the

A spatial quantitative analysis of the organic pollution status of a marine area, Laizhou Bay, was performed based on the organic pollution index, and the socioeconomic impacts of coastal population, agriculture, and industrial production on this marine area in 2014 and 2015 were quantified. The correlations between marine organic pollution and these three land-based factors was evaluated using SPSS

Under the influence of high-intensity human activities, the discharge of chemical pollutants in coastal waters increases progressively year by year and exceeds the marine self-purification capacity, which in turn leads to major marine ecological environmental problems such as eutrophication and excessive heavy metals in water bodies. Hence, studies on the marine environmental capacity (MEC) are the

Marine ecosystems are reported to be contaminated by microplastics (MPs) (< 5 mm); however, the ecological mechanisms involved in the ingestion of debris by marine organisms are relatively unknown. By developing and optimising an appropriate protocol of gut digestion for fish species, this study explores a tropical estuarine environment to unriddle the processes responsible for the different ingestion

The fatty acid contents, metals, and other elemental composition of 25 seaweed species from three heterogeneous locations of the Kerala coast were studied. The lipids (2.65%–13.6%), proteins (16.6–213.4 mg/g) and carbohydrate content (11.24–59.4 mg/g) varied significantly among the species. Most of the seaweeds were dominated by linolenic acid (12.44–82.7%) and oleic acid (1.68–52.7%) of their total

Although the assessment of beach cleaning efficiency evaluation would be desirable for management purposes, the practice is not common. This evaluation is crucial for the safety of beachgoers, conservation efforts aiming to preserve ecological services, and the sustainable development of the oceans. The main goal of this work was to assess the efficiency of the beach cleaning method adopted in a Southwestern

Eutrophication remains a threat to coastal habitats and water quality worldwide. The U. S. Clean Water Act resulted in reductions of nutrient loading from point sources but management of nonpoint sources (NPS) of nutrients remains challenging despite efforts over at least three decades. The hydrological factors, best management practices (BMPs) and regulatory mechanisms that target nutrient NPS and

The morphological, phenological and ecological characteristics of shallow coral reefs have been widely studied, but only recently have mesophotic corals begun to be studied. Very little is known about these ecosystems and their associated communities, such as the zooplankton community, which constitutes a food source for reefs and for the organisms that inhabit them. In the present study, changes in

This study aimed to reveal the need for efficient catching activity by comparing the efficiency of pelagic trawl fisheries in Turkey with Stochastic frontier analysis (SFA). For this purpose, data were obtained through face-to-face interviews with 19 vessels randomly selected among 82 fishing vessels during the period. Variables used for technical inefficiency (ui) were determined as professional trawling

Although fisheries for invertebrates are increasing rapidly worldwide, many of them lack the rigid assessments and regulations that are typical of finfish fisheries. We report nektonic invertebrate communities of the Yangtze River estuary in the boreal autumn (November) from 2013 to 2017, and report how these are related to environmental variables. Communities comprise 26 macro-invertebrate nektonic

The St. Lawrence Estuary (SLE), in eastern Canada, is a dynamic coastal environment where no recent description of the particles’ composition and size distribution has been completed. In this study, we characterize the particle size distribution (PSD) of suspended particulate matter in the SLE, both vertically and horizontally, and evaluate its variability during ice-free (May 2010) and ice-covered

The only beach in Hong Kong where the intertidal bivalve Meretrix cf. meretrix occurs predominately is at Tong Fuk Miu Wan on the southern coast of the island of Lantau. Tong Fuk Miu Wan and its partner, more sheltered, beach Shui Hau Wan are by virtue of their orientations separated from each other in terms of their physical form and hydrodynamics. Tong Fuk Miu Wan is more exposed to wave action arising

This pilot study aimed to assess whether depth had an impact on the sexual development and quality of green sea urchin (Strongylocentrotus droebachiensis) gonads, and whether market quality urchins could be found at greater depths than usually fished in Breiðafjörður, west Iceland. Green sea urchins were collected monthly at 32 and 60 m depth sites from September 2016 to August 2017. Development and

The present study explores the seasonal variability of the circulation in the Gulf of Tonkin (GoT) and associated water fluxes, and identifies the driving physical processes of this circulation. We use a 9 year (2009–2017)high-resolution numerical simulation. It is evaluated with historical hydrographic data, sea level data, high-frequency radar data and satellite products. Our results reveal a summer

The IUCN Red List of Ecosystems has been employed to assess the status of ecosystems and evaluate the risk of their collapse. The RLE assessment was conducted on the main ecosystems of the marine bar of Burullus wetland; sand plain and salt marshes ecosystems of the marine bar which separates the lake from the Mediterranean Sea. Four criteria were used for conducting the assessment; (A) reduction in

Development of port infrastructure for small-scale fisheries started in the late 1960s and increased in the 1980s along the northern Yucatan Peninsula. These ports mainly consist of a pair of jetties that significantly interrupt littoral transport. Hence, they are responsible for coastal erosion in this region, which has been exacerbated by urbanization in coastal areas. Here, satellite imagery, Unmanned

Bull Island (BI) is a coastal sand spit that formed as an unintended consequence of the construction of two walls, built over 200 years ago in Dublin Port, Ireland to alleviate silting of the shipping route. A large lagoon, on the land side of the island was separated in 1964 by the construction of a causeway to produce two separate lagoons that are now impacted by different water sources. Here we

We introduced a simple methodology to determine basin-wide marine export production ratios during spring phytoplankton bloom periods by combining monthly varying mixed layer depths (MLD) derived from observed temperature depth profiles, satellite time series of chlorophyll-a (Chl-a) concentrations, and hypothetical critical depth. The MLD-Chl-a based approach yielded monthly export ratios reflecting

The input of nutrients to the coastal environment is essential to support biological productivity but an excess of nutrients can lead to eutrophication. Here we use a pelagic ecosystem model to investigate the effects of nutrient inputs from a sewage treatment plant on the plankton dynamics of Port Phillip Bay, southern Australia. The effects of a 50% increase or decrease in nitrogen concentration

There is a constant need for baseline information on the mugil fish health present in the North-Eastern region of Manzala lake. This study deals with the determination of the limit of heavy metals in Manzala lake as a representation of the northeastern area of Egypt and studied its impact on mugil health. Assessment of the mugil health achieved by studying the tissue heavy metal accumulation and histopathological

Coastal blue carbon systems (mangrove forests, seagrass meadows and tidal saltmarshes) are renowned for their efficacy at sequestering large amounts of carbon (C) in sedimentary sinks and effective management action to preserve these C stocks requires an understanding of spatial variability within an estuary. This study analysed 33 coastal blue carbon sediment cores across three subtropical estuaries

The Santa Cruz Channel is part of the Itamaracá–Itapessoca estuarine system in Brazil’s Northeast region. It presents a complex geometry and receives the debouches of several small streams. Here we present an assessment of the hydrodynamics of the Santa Cruz Channel and its role on the suspended sediment transport. A field campaign was carried out when water level, cross-sectional flow, current velocity

Understanding relationships between the spatiotemporal variability of fishery resources and marine environmental variables forms the basis of effective development and utilization of the northern South China Sea (NSCS) fishery resources. Decapterus maruadsi is one important pelagic economic fish which inhabits the coastal warm waters of the NSCS. We examine the spatiotemporal distribution and central

The disposal of whale carcasses in beach burials has raised perceptions of shark attraction to adjacent waters. Understanding the concerns and perceptions of the community is key to creating sound management practices and educational resources. We surveyed community perception of the disposal of whale carcasses and the factors influencing public opinion. Overall, the community underestimated carcass

Fish populations respond to environmental change with daily, monthly, and annual time delays, depending on each species life cycle. However, these delays are rarely included in Generalized Additive Models (GAMs) for species distribution that uses time-series data. Therefore, the predictions of these models entirely rely on assumptions of immediate fish response to oceanic factors. Spatial autocorrelation

Liao River Estuary in Northeast China is one of the most important seven estuaries in China. Grain size, clay minerals, major and trace elements and rare earth element (REE) compositions were employed to evaluate the chemical weathering and climate of provenance area, and source-rock composition, and to further infer the provenance and tectonic setting of the Liao River Estuary sediments. Except for

In this study, molecular taxonomy associated with Spicara flexuosa, Spicara maena, and Spicara smaris was examined with a geographical focus along the coasts of the Turkey and the Mediterranean. In addition, the effects of the Turkish Straits System on the evolutionary history and phylogeography of Spicara flexuosa were investigated. The mitochondrial cytochrome c oxidase I, cytochrome b, and the nuclear

Mesoscale eddies play an essential role in transporting energy and modulating the spatial and temporal distribution of turbulent mixing. By analyzing the microstructure and hydrographic observation data in the subtropical Northwestern Pacific Ocean (STNWP), we found that the turbulent kinetic energy (TKE) dissipation rate influenced by an anticyclonic eddy (AE) in the thermocline was enhanced by at

The pearl oyster Pinctada imbricata radiata (Leach, 1814) is considered as an invasive species and despite its presence, for more than half of a century in the Mediterranean its fisheries in Greek waters is illegal, unregulated and unreported (IUU) due to lack of legal framework and fisheries exploitation. The present study is based on a three-level approach including a(n): (a) in-situ field sampling

The 2013–2014 summer in the Southeast Brazil region set records for negative precipitation anomalies and the highest sea surface temperatures. Such event was attributed to the anomalous presence of atmospheric blocking, which prevented the propagation of a cold front towards the Equator and the establishment of the South Atlantic Convergence Zone, two phenomena that regulate the precipitation regime

After the permanent demarcation of Exclusive Economic Zone boundaries with Myanmar and India through the International Tribunal for the Law of the Sea and the United Nations Convention on the Law of the Sea, Bangladesh has exclusive rights to exploit and to explore marine resources across 118,813 km2 in the Bay of Bengal. To reap economic benefits from maritime space, the government of Bangladesh recently

This study explores seasonal and interannual variability in sea surface temperature (SST) in the Yangtze River Estuary, China based on remote sensing data from 1982 to 2017. The influences of climate and river flow on SST were explored using power spectrum and correlation analyses. The results show that SST had a warming trend of 0.48 °C per decade over the study period and exhibited significant oscillation