The smooth clam Callista chione is distributed in Moroccan Mediterranean coasts in considerable densities. This study examines the population structure, age, growth, mortality, longevity and exploitation level of the smooth clam on Martil coast. Samples were collected monthly from July 2016 to July 2017. Morphometric relationships were studied and showed negative allometric growth for the width/length

Small-scale fisheries (SSF) are often considered sustainable; but comprise 95% of global fishers and cumulatively evoke substantial ecosystem impacts that include collateral mortalities. Marine mammals and sea turtles are particularly vulnerable to SSF and have been the focus of conservation strategies. However, many strategies have fallen short of objectives. This study aimed to elucidate and help

In the present study, we assessed the spatial and temporal distributions of metal contents and their environmental risks in the surface sediments from Essaouira protected coastal area (Atlantic coast of Morocco). Surface sediment samples of the biogenic reefs of Sabellaria alveolata (Annelida: Polychaeta) were collected seasonally, and the fine fraction (<63μm) analysed using Inductively Coupled Plasma

Coastal wetlands are seen in the central part of the SW coast of Kerala, India at Muriyad, Thrissur (∼15 km orthogonal to the present day coast towards inland) and forms a part of Vembanad kol. These wetlands are sheltered by well-developed beach ridges in the west and lateritic uplands towards east between the latitudes and longitudes of 10°20‘-10°30‘N and 76°10‘-76°20‘E respectively. The present

The distribution of Pb, Ni, Zn, Cu, Cr, Mn, S, P, Na, Ca, K, Si, Al, Fe were studied in the mangrove sediments across five different sites in Maharashtra. Energy dispersive X - ray fluorescence method was utilised for the determination of the elements in the sediment both before and after the monsoon. The spatial variation, as well as the monsoon was seen to affect the metal concentration in the mangroves

South Eastern Arabian Sea (SEAS) is an upwelling dominated region, where the distribution of chlorophyll-a (Chl-a) is mainly controlled by basin-scale to mesoscale processes associated with seasonal reversal of winds and currents. The analysis of long-term satellite-derived Chl-a data revealed interannual variability in association with extreme climatic events. Chl-a data were obtained from Ocean Colour

Mugil liza is one of the most important fishery resources in west margin of Southwestern Atlantic. Its northern population (northward of 23°40’S) is distributed along the Brazilian coast and, including the Guanabara Bay (GB, 22°50’S, 43°10’W). This study aimed to evaluate the ring formation in the sagitta to estimate the fish age and growth. Based on monthly samplings (2011-2013), 815 individuals were

Shore-side electricity has been put forward to ease the pollution problem of ports. This paper considers a tripartite evolutionary game model among the government, one port company, and the other port company, and establishes the payoff matrix of the three parties. Through analyzing the replicated dynamic equations, we find that only when the government selects the passive supervision and both port

The shallowest zones of coastal lagoons are particularly appropriate nursery habitat for many fish species by providing refuge from predators and abundant food, among other benefits. However, little is known about the characteristics of fish assemblages and their relationship with environmental factors in these areas. The main objective of this study was to investigate the abundance and composition

The free charge and open-source of remote sensing imagery, including Landsat-8 and Sentinel-2, offer new opportunities for forest-based AGB mapping and monitoring, especially mangrove forests in the tropics. Modelling relationships between mangrove AGB estimation-based survey and remote sensing data (spectral bands and vegetation indices) have not been evaluated in Quang Ninh Province, Vietnam. In

Coral reefs are active areas of scientific interest. Globally, coral reefs are declining due to enhanced sea surface temperature, rapid sea-level rise and other tectonic-climatic factors. In this paper, we have presented tectonic control for coral reef morphodynamics over the northern part of Andaman, Landfall Island. The 2004 Sumatra earthquake of Mw 9.1 posed essential changes on the overriding plate

Increasing use of ocean space, through land or sea industries, has over time caused aggregated ecological problems as well as state jurisdictional issues thus leading to the development of regimes for regulating and reversing such effects and disputes. In this context, the United Nations Convention on the Law of the Sea (UNCLOS) constitutes a fundamental instrument for the governance of the marine

To investigate the cruise samples among 14 stations, it was observed that high nutrients concentration and phytoplankton abundance in stations 13 and 12 pose challenges to related ocean processes and physical parameters such as sea surface temperature (SST), wind action, currents, etc., in the Arabian Sea. Based on this, analysis and interpretation were carried out to compute the Ekman mass transport

Capital of several empires through centuries, Istanbul has been a populated city in history. However, the population has increased by a factor of 13.3 over the last seven decades, which in turn has made this megacity a hotspot of domestic and industrial pollution. Marine biodiversity around Istanbul suffered from the increased pressures due to overfishing, extensive recreational usage, extreme habitat

Climate change shows itself in many different ways on marine life. The fishery is also a part of marine life and affected by climate change-driven weather conditions directly or indirectly. In the present study, relationships between commercial species (grey mullet -≈90% of total capture- and gilthead seabream) that were captured from lagoon traps in Köyceğiz lagoon (Turkey) and local weather conditions

Antinioti is a shallow Mediterranean coastal lagoon located on the island of Corfu in West Greece. For several years, the lagoon has been exploited for fish stocks by the local community. Therefore, the lagoon presents regional economic importance. However, studies on the physical, chemical, and biological properties of the lagoon are limited. Our study evaluates the effect of physical and chemical

Since 2011, massive inflows of pelagic Sargassum have been recorded in the Caribbean region, which has affected coastal ecosystems, mainly water quality and the flora and fauna that inhabit these areas. The aim of this study is to evaluate the temporal dynamics of Sargassum arrival and its relationship on water quality in three sites of the Mexican Caribbean (Mahahual, Xahuayxol and Xcalak). We used

Increasing sea surface temperature (SST) is one of the primary indicators of climate change that plays a major role in the intensification and formation of climatic disturbances and extremes. This study examined the impact of these factors on marine fisheries in the North Indian Ocean, controlling for regional differences. The findings suggest that there is a significant upward trend in the SST, with

Seychelles–Chagosthermocline ridge is one of the major upwelling area in the tropical Indian Ocean, where planktons are known to have large impacts on ocean ecosystem and biogeochemical cycles. Time series assessments of surface zooplankton abundance, biovolume, and community composition were carried out in the Indian Ocean during June 2014. In this paper, we explore the impact of phytoplankton size

In mangroves, species specific spatial habitat zonation preference of fiddler crabs could influence the functioning of mangrove ecosystems. Spatial zonation of fiddler crabs in tropical Malaysian mangroves across different temporal scales has not been studied extensively. In this study, the abundance and species richness of several fiddler crab species across a mangrove intertidal zone were examined

The 400-km long coast of the Bight of Benin, formed by sand barriers and lagoons, is bordered to the east by the Niger River Delta and to the west by the Volta River Delta and is characterized by several coastal infrastructures, of which the most important are the deep water harbors of Lomé, Cotonou, and Lagos. In this study, an enhanced version of the CASCADE coastal evolution model was implemented

In reef ecosystems, vulnerability to exploitation is species-specific and may vary with natural abundance, life history characteristics, or ease of capture. Therefore, understanding the growth parameters and exploitation rate of individual species is important, because application of a uniform management strategy in species with different responses or vulnerability to exploitation can be inappropriate

A field-based experiment was conducted on a detritus-loaded beach on the south coast of the British Isles (Poole Harbour) to investigate the decay rates of different combinations of algal detritus and their associated nematode assemblages. Ten algal mixture treatment combinations (monocultures with all possible 2 or 3 mixed algal treatments) of three different species of green (Chlorophyta), brown

The surf-zone of twelve sandy beaches on a tropical Atlantic dissipative coastline (Sergipe, Brazil) was studied to assess whether fish assemblages may be affected by spatial (proximity to estuaries) and seasonal (wet vs. dry) variations. Sampling locations were classified into sites of greater estuarine (EC) and marine (MC) contribution according to the coastal geomorphology. Samples were obtained

The Indian Sundarbans is a highly vulnerable ecosystem exposed to climate change with salinity intrusion, increasing cyclones as well as anomalies in rainfall and temperature that create an adverse impact on the physiology of resident and migratory fishes. Changes in the density and morphology of chloride cells are essential adaptive characters in response to varying salt level in the environment.

This study puts forward an optimal speed decision-making method for a coastal bulk carrier as an important energy efficiency practice. Firstly, the ship resistance model is established considering the impact of multiple environmental factors, such as wind, waves and shallow water; on this basis, according to ship-engine-propeller ship–engine–propeller interaction mechanism, the ship energy consumption

In the context of green transportation, as an important clean energy technology, PV modules applied in vehicles has attracted the attention of scholars from all over the world. The reliability of PV modules on vehicles is the premise of their effective uses. In addition to the impact of solar irradiance, temperature, dust and other factors on the PV modules, vibration is also a factor that cannot be

Extensive information on the short period of tintinnid community structure along the Mediterranean coastline is available. Contrarily, time-series data are scarce. In the framework of a monitoring program, the distribution, abundance and community structure of tintinnid assemblages were investigated at monthly intervals over a thirteen year period (2002–2014) in two stations (B1 neritic and B2 oceanic)

The coastline of the Nile Delta extends between Alexandria and Port Said and spans approximately 240 km. It experienced accelerated erosion since the construction of Aswan High Dam (AHD) where more than 1.2 billion EGP were spent to mitigate the imbalance in sediment transport patterns as AHD blocks most of the sediments reaching the Mediterranean coast. The current study investigates various combinations

Rising sea levels pose a potential threat to the densely populated areas along the Indian coastline and the low-lying islands, and cause disastrous impacts to coastal and offshore structures. Large fluctuations in sea surface temperature (SST) in the North Indian Ocean (NIO) is one of the contributing factors in inducing significant changes in sea level along the Indian coastline. Therefore, it is

In this study we present an approach to calibrate a three-dimensional hydrodynamic model of a salt-wedge estuary, the Araranguá Estuary, southern Brazil, based on the Delft3D-FLOW model. The calibration was carried out in four steps to predict the vertical salinity structure along the estuary in an efficient and effective way. Skill assessment was used to evaluate the calibration quality. The model

Knowledge on in situ spectral characteristics of individual end-members are essential as they provide much needed base for analysing the data obtained through remote sensing systems. This study intends to develop a comprehensive spectral library for different coral reef species and its associated benthic compositions present in Gulf of Mannar, India. In this regard, a field programme was designed to

Frequent swings and diversions of old channels in lower reaches coexist with the multi-phase overlapping of Yellow River sub-delta lobes. In addition, sedimentary bodies of sub-delta lobes during various developmental stages are known to have undergone overlapping with one another. Experimental analyses of 24 short-column (length of less than 1 m) stations were examined. In addition, due to the influencing

This study analyzed the current status of the population and stock assessment of the red grouper Epinephelus morio from the Campeche Bank, Yucatán, based on the Schaefer biomass dynamic model and considering the three fleets that operate in the study area. Thus, five indices of relative abundance were used, expressed as catch per unit effort (CPUE). The carrying capacity (K) of the red grouper population

The Andaman Coastal Sea provides a rich resource of seafood as well as a major contribution to the socio-economy of many local communities in Thailand. The aim of this study is to model food web structure and estimate energy flow through trophic levels using the Ecopath tool. Data have been collected on fish length, weight and diet composition from three provinces, Krabi, Phuket and Phangnga along

This study was conducted to assess the physiological parameters of reproduction (sex ratio and gametogenic cycle), parasitism and biological indices (condition index and gonadal index) in Donax trunculus. Samples were collected monthly over two years (from 2016 to 2017) from three sites along the coast of Taghazout (in Southern Morocco) hosting the tourist resort Taghazout Bay. Five stages were depicted

This study aims to assess the soft corals community around Mauritius and Rodrigues Island due to the limited research on the abundance and diversity of soft corals in the area. Seven soft corals species are newly reported from Mauritian waters. Triplicates of 5-metreline transect were used to survey soft corals at twelve different monitoring sites. Of the sites monitored for soft coral occurrence,

Bivalve aquaculture is a major industry supporting food production in coastal areas. Although sea water temperature increase due to climate change is expected to affect marine ecosystems in a variety of ways, it is important to determine whether changes in water temperature and associated changes in the trophic conditions will enhance or inhibit the production of bivalves. In this study, I conducted

Alongshore currents in the surf zone are formed after incident waves break. This process depends on the characteristics of the incident waves and can be altered by the wind, and to a lesser extent, by bathymetry and tide. In order to understand the behavior of the alongshore currents on the north coast of Rio Grande do Sul (Brazil), two datasets were obtained in the field. The first one was acquired

Fisheries is an important socio-economic contribution to the coastal fishing communities of Vietnam. Unfortunately, inshore natural resources have decreased in recent years. This decline has been largely attributed to overfishing and using a fishing gear with poor size selectivity. This paper estimated size selectivity curves for 8 important economic species using a covered codend attached to the codend

The food and feeding habits of the sawtooth barracuda, Sphyraena putnamae, from the southeastern Arabian Sea, India, were studied from 1367 specimens having a fork length range of 16.5–76 cm. The sawtooth barracuda consumed diverse prey items, which were grouped into three categories: teleosts, molluscs, and crustaceans. Teleosts were the preferred and dominant food component, while molluscs and crustaceans

Weakfish Cynoscion regalis (Bloch and Schneider, 1801) is one of the most recent invasive fish in the Iberian Peninsula (Europe). Weakfish has established in the Sado estuary (Portugal) since the early 2010s, and fishers and anglers have expressed concern about its impacts on native prize fish. However, almost a decade later, there is no information on the ecology of weakfish in the non-native area

Phytoplankton abundance can be affected both by physicochemical factors such as nutrients, temperature or light availability (bottom-up control), and by the abundance of predators (top-down control). Phytoplankton research in the Arabian Gulf has so far focussed on bottom-up control of the phytoplankton community, this study was the first to include top-down control as well. High abundances of the

The Algerian coast receives significant inputs of metallic pollutants. To assess the accumulation of potentially toxic elements (Pb, Cd, Hg) by benthic fish and the consequent health risks for consumers, red mullet specimens (Mullus barbatus barbatus, Linnaeus, 1758) were sampled (n=424) in 3 sites along the Algerian coast (Algiers, Bejaia and Dellys) and analysed for Pb, Cd and Hg in muscles and liver

Two development strategies have been described for crab larvae whose benthic adults live in brackish waters: (i) retention in the parental habitat, and (ii) export to ocean waters. In order to discover which these strategies is adopted by the crab larvae of Panopeus lacustris, samplings of mesozooplankton were performed seasonally by six sites (transect ≈ 233 km long, towards continental slope) on

The extent and speed of recent changes in reef coral abundances due to ocean warming and human impacts require more widespread capability to map and measure these changes, especially in countries like the Philippines. We present “C30”, a simple, rapid, scientifically valid, and low-cost method for skin divers or freedivers to take random photo-quadrat images within predefined stations on the upper

Scomberomorus commerson (here after ‘Kingfish’) is the choicest table fish of the Gulf Cooperation Council (GCC) region and the most valuable finfish of Oman. Catch-effort data from 2000 to 2019 of Oman’s Kingfish fishery was fit to Schaefer model (log-normal assumption) for estimating maximum sustainable yield (MSY) and biological reference points (BRPs). Carrying capacity (K), catchability coefficient

Besides global warming, coral reefs face various anthropogenic threats, including watershed-based and marine-based contaminants. Recently, Irgarol 1051, a photosystem II herbicide, has been introduced as a “booster” agent in copper-based antifouling paints after global ban of tributyltin (TBT) in January 2008. Irgarol is considered to pose a potential risk to corals. In this study, a clone of Acropora

In this study, we investigate submarine groundwater discharge (SGD) and the influence which coastal geomorphology and geology can have on its behavior. Numerical models have been developed to estimate the magnitude of submarine groundwater discharge (SGD) from catchments with different geomorphology on the Southwest coast of India. Two coastal catchments of Thiruvananthapuram district, Kerala, India

Most of the studies on sea turtle nesting activity nowadays are focused on the impacts of climate change. However, there is a lack of studies gathering knowledge about the influence of coastal vulnerability to erosion and settlement to assess sea turtle nesting. This study aims to verify the influence of coastal erosion vulnerability over sea turtle nesting in five Brazilian Northeast beaches, in Pernambuco

Hake, mackerel, horse mackerel, anchovy and sardine larvae were identified from samples of ichthyoplankton collected during eight surveys in the Bay of Biscay between 2000 and 2005. Comparative analyses were carried out to explore the early growth patterns of these species based on differences in body proportion and the interpretation of the otolith microstructure to estimate their age. Statistical

This study analyzed the spatial variation of stable isotopes (δ15N and δ13C) and the trophic position of three rocky reef fishes, Balistes polylepis, Stegastes rectifraenum and Kyphosus vaigiensis. According to previous feeding studies, these species are categorized as a benthic carnivore, an omnivore, and an herbivore, respectively. Specimens were sampled in two locations on the western Gulf of California:

Shellfish are a popular food with high cultural, economic and nutritional importance in New Zealand but may also be a significant pathway of human exposure to contaminants. Currently, limited data on shellfish consumption rates in New Zealand poses challenges for risk assessment. This study investigated the rate of shellfish consumption and recreational gathering practices in Northland using a self-completed

The Saudi Arabian Gulf coast is witnessing many industrial, recreational and other developmental activities. Impact of these activities on the intertidal macrofaunal communities of this region has not been documented well. Thirty four stations falling under four zones along this coast were sampled to study the benthic macrofaunal community. A total of 81 taxa were recorded and the species richness

Based on macrobenthos collected from 18 stations in Hangzhou Bay from 2012 to 2019, the diversity and secondary production of macrobenthic communities in Hangzhou Bay were studied. The results showed that in total, 49 macrobenthic species were collected across the whole sampling period. Among the 16 dominant species determined, the polychaete Sternaspis chinensis and the bivalve Nucula faba were the

This study examines for the first time the biology of alfonsino (Beryx splendens) from three small seamounts of the Sierra Leone Rise (SLR), an unexploited and fragile ecosystem in the Atlantic, using data from an experimental survey carried out in 2001 by Spanish longliners. In general, the lack of rigorous baseline data limits the implementation of efficient management and conservation plans in fisheries

Environment DNA (eDNA) is a nonlethal sampling method that has potential for evaluating fisheries resources. To evaluate whether eDNA information is useful for fisheries, we collected and analysed eDNA samples from 14 sites in Tokyo Bay from April 2018 to March 2020. Using MiFish universal primers, fish mitochondrial 12S rRNAs were amplified from the eDNA by polymerase chain reaction (PCR) and then

The tropical climate is seemingly stable with little variation in environmental factors throughout the year. However, a growing number of studies have reported monsoon-driven changes in zooplankton communities in tropical waters. This study examined the monsoonal and spatial variation in the zooplankton community in Sepanggar Bay, Malaysia. Samples were collected from 9 stations throughout the bay

In the last decades, there has been an increase of macroalgal species appearing in new geographic regions. These new records are being linked to non-intentional global human-mediated transport. In Iceland three macroalgae species have been reported as non-indigenous. We updated the number of non-indigenous macroalgae to 8 species, 4 of which are potentially invasive. Pathways and vectors of each macroalga