On the basis of traditional morphological classification, Gymnothorax minor has been misidentified as Gymnothorax reticularis in China. Because of the special ecological habits and aggressiveness of this species, little research has been performed on its population genetics. Given the general decline in offshore fishery resources, it is necessary to study the genetic characteristics of G. minor in

The Panay Strait constitutes a bathymetrically complex system with intense tidal currents. The four major tidal constituents in the total energy spectra inferred from sea level and current profiles are K1, O1, M2, and S2. Spatially, O1 and M2 dominate over K1 and S2, respectively. The diurnal tide accounts for highest amplitude variability over the shallow shelf while semi-diurnal tides over the deeper

The carbon and nitrogen stable isotope ratios of copepods, particularly Acartia tonsa and suspended particulate organic matter (SPOM) samples, collected seasonally (2014 to 2017) from 13 sites in the tidal estuaries of Maryland were analyzed. We hypothesized that copepods at sites close to the mouths of lagoon tributaries have more depleted δ13C than copepods at sites near the inlets, and that variations

The São Francisco river flow is regulated by a series of dams that work in cascade for hydro-power generation, maintaining the flow <1000 m3 s−1 all year long. This caused the dampening of the flood peaks and perpetuated the salt intrusion, changing the function of the system as a material source to the coastal ocean. Here we present an assessment of the estuary salt intrusion, hydrodynamics, mixing

Globally, climatic and anthropogenic forcings are causing the catastrophic decline of coral reef ecosystems, which sustain a plethora of marine life and support the livelihoods of several millions of people. Lakshadweep- Maldives-Chagos archipelago (LMC) forms one of the largest chains of atoll systems in the world, and due to remoteness from the mainland, its islands boast a unique set of flora and

This study aimed to investigate water quality and identification, prioritization and network analysis of the stakeholders of the Anzali International Wetland, Iran. In the wetland watershed, a wide range of stakeholders benefit from ecosystem services and, with regard to the activities they carry out, affect the functions of the wetland in the lower part of the watershed. The different stakeholders

This study investigated two estuaries on the northern coast of Brazil submitted to different anthropic activities. The main objective was to assess the use of oysters (Crassostrea gasar and Paxyodon ponderosus) and phytoplankton as bioindicators of environmental contamination. Water, sediments, phytoplankton and oysters were chemically analyzed by ICP-OES and ICP-MS. The source for metal bioaccumulation

Nearly 90 Lagrangian surface drifters were deployed and often recovered and re-deployed in lower Cook Inlet and Kachemak Bay from 2003 through 2007 and from 2012 through 2017. Velocity vectors calculated from the hourly position data by central finite-differences were low-passed filtered to create maps of the mean, sub-tidal surface circulation. The circulation maps, while generally consistent with

Baía de Ilha Grande and Baía de Sepetiba are two connected coastal bays in southeastern Brazil just west of Rio de Janeiro. They are favored for tourism and recreation, provide most of the potable water for the city of Rio de Janeiro, are the site of the only two nuclear reactors in Brazil, a deep-water oil terminal, a Federal container port, and hundreds of industries. The bay system experiences mixed

Lateral variability of residual flow was investigated in Maputo Bay in Mozambique, Africa. The bay is nearly rectangular with 30×30 km, mean depth of 5 m. The bay mouth is ∼18 km wide with mean and maximum depth ∼10 m and 30 m, respectively. Tides ranges between 1 and 3 m at neap and spring tides, respectively. The mean annual river flow is ∼225 m3/s, ranging from ∼150 to ∼400 m3/s during winter and

Tidal restriction caused by embankments can have large impacts on estuarial ecosystems. It changes the tidal regimes, which influence the growth and development of marsh plants. Although large-scale tidal freshwater marshes are negatively or positively affected by the embankments especially around the Yellow Sea in Korea, little is known regarding how the tidal restriction changes the plastic growth

Small-sized eels of the Tropical Conger, Ariosoma scheelei, appear to be common in shallow Indo-Pacific tropical sheltered-bay and lagoon-type habitats when they are sampled appropriately and their larvae are abundant offshore of these areas, but little is known about their biology. Collections of about 7800 likely A. scheelei larvae in May 1997 using a 2-mm mesh 70 m2 mouth-opening trawl with a multiple

The decline of Estuary Cobbler (Cnidoglanis macrocephalus) stocks in south-western Australia since European settlement of the region in 1829 is described, based on evidence from historical documents, fishery statistics and scientific surveys. Estuary cobbler is a relatively large, long-lived, benthic carnivore that was once abundant in the three largest west coast estuaries, where it was a major component

Summer temperatures in excess of 52°C, have been measured at the high tide mark in surficial substrates in the exposed areas of an intertidal mudflat in Bahrain. The incoming flood tide may have a temperature as high as 42°C. As a result, large swaths of the upper intertidal zone are barren of living meiofauna (e.g., foraminifera, ostracods, gastropods, and worms) during the hottest months of the year

European anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) are two of the most important small pelagic fish species in terms of biomass and commercial interest in the Mediterranean Sea. Their populations are clearly influenced by environmental variations, making them good bio-indicators of climate-driven changes. Here, we reviewed the different environmental factors documented to affect

A study was performed on a 32 Km stretch of the River Hooghly as part of a project under the Airborne Visible Infrared Imaging Spectrometer - Next Generation (AVIRIS-NG) scheme between Indian Space Research Organization (ISRO) and National Aeronautics and Space Administration (NASA). It was governed by 33 water quality variables comprising physical, chemical, biological and ecological ones. The selected

This study focuses on the KwaZulu-Natal deepwater crustacean trawl fishery located off the east coast of South Africa. It investigates the spatiotemporal changes in fishing effort and catch per unit effort of three target species of knife prawns (Haliporoides triarthrus), African langoustine (Metanephrops mozambicus) and pink geryon (Chaceon macphersoni) using a space–time cube and hotspot analysis

The Olive Ridley (Lepidochelys olivacea) is one of the smallest species of sea turtles well known for its migration across the Indian and Pacific Oceans, as well as Southeast Asia waters. However, there is currently no available information on their population structure across Indonesia, which will be beneficial to their management. Therefore this study was conducted to determine the genetic structure

Mangroves are the dominant coastal vegetation in tropical estuaries and host a large diversity of brachyuran crabs. Crab larvae have adapted to dynamic hydrological conditions in estuaries using several physiological and behavioral strategies. Changes in crab larval assemblages can be monitored in time in order to detect ecological changes occurring within estuaries. For this study, we sampled quarterly

The Rufiji River Delta (RRD) in Tanzania is an internationally important wetland. Subsistence mangrove rice farming (MRF) uses pesticides to combat crabs and herbicides to combat weeds. We undertook the first investigation of the dynamics of pesticide residues and hazard in farm soil, water, and sediment, during and following application. Twenty-one organochlorine and organophosphate insecticides,

In this study, the bio-concentration of trace metals (Cd, Cr, Cu, Fe, Ni, Pb, and Zn) was determined in eight edible fish species, which were caught from the northern shores of the Gulf of Oman. For this purpose, a total of 160 fish samples in eight species, originating from different ecological status and trophic levels, were obtained twice, once during the warm season and once in winter. Sample preparation

In the Caribbean Sea, the winged oyster Pteria colymbus represents a promising resource for food and pearl production. The goal of the present study was to determine the influence of environmental variables generated by the seasonal coastal upwelling on the fatty acid profile (FAP) of the winged oyster Pteria colymbus. Changes in fatty acid (FA) levels were determined by gas chromatography coupled

An extensive field experiment has been set up to investigate the hydrodynamics of a pocket sandy beach partially shielded by a breakwater, in the vicinity of a port used mainly by the oil industry. Moreover, on the other side of the beach, an abandoned pier also affects the sediment transport, which makes the complex bathymetry challenging for numerical modelling. Measurements of directional waves

Seafood processing methods alter the metal concentrations in fish. Since the concentrations are often quantified for fresh fish, such alteration can under or overestimate the daily intake of metal elements through consumption. This study aimed to determine metal concentrations in fresh and salt-dried anchovies (Encrasicholina devisi) collected from Kuala Terengganu coastal waters. The samples were

Due to progressive urban development along the Mexican Caribbean coastline, it is crucial to gauge the impact of anthropogenic contamination of marine ecosystems through biomonitoring procedures. In the current study, we quantified the concentration of 49 inorganic elements in the blood and scute tissues of clinically healthy nesting hawksbill sea turtles (Eretmochelys imbricata). The elements were

Aspects of reproduction and population structure were investigated between June 2017 to May 2018 in sardines, Sardina pilchardus (Walbaum, 1792) from the Safi fishing area. The sex ratio was generally in favor of males (χ2=19.50). Out of 3252 total specimens sampled, 1404 were females (46.00%), 1648 males 50.68%) and 200 immatures (6.15%). The immatures were best represented in the small size classes

Life-history traits of Lateolabrax latus, one of the popular piscivore species for commercial and recreational fishing along the coasts of western Pacific, were investigated based on 373 specimens collected over a period of 8 years (2011–2018) in a coastal area of southwestern Japan. Histological observation of gonads indicated that the species’ main spawning period is from January to March in this

An estimate of the population growth rate (γ) is an essential biological information that can be input into stock assessment models to estimate management quantities for commercial fisheries. Demographic analysis conducted using the Leslie matrix method was used to estimate γ for Indian Ocean blue shark (Prionace glauca), with Monte Carlo simulation used to quantify uncertainty. A harvest analysis

This paper provides a synopsis of the ecological structure and function of waterways in the Botany Bay catchment, informed by a comprehensive review of literature. Botany Bay is one of Australia’s best known and most studied waterways. It is a large sheltered embayment with a marine-dominated estuary that receives freshwater discharges mainly from the Georges and Cooks Rivers. The catchments of those

Size-based partitioning of phytoplankton biomass is a crucial determinant of the type of food web functioning in an aquatic ecosystem. Seasonal and spatial distribution of total as well as size-fractionated phytoplankton biomass (pico, nano and micro-phytoplankton) from the tropical creek (Thane creek, India), was assessed in response to ambient physicochemical parameters. Nanophytoplankton biomass

The water bodies along a continuum from estuaries to open ocean display significant changes in their physical, chemical and biological characteristics. In the current study, we report the influence of such changes on the abundance and community structure of bacteria and archaea in a continuum from Cochin Estuary, in the southwest coast of India, to the open ocean of Arabian Sea. The bacterial and archaeal

Taiwan lies on the northwest Pacific and is usually invaded by typhoons in summers and autumns. When typhoons strike the coast, surges usually occur. In addition, if a typhoon surge occurs during a high-tide period, the water level starts to rise. As a result, largely urbanized and highly populated regions around the estuaries may be devastated by catastrophic damage owing to floodwater elevation rising

Population genetic structure of Sardinella lemuru in Philippine waters was examined using mitochondrial DNA markers, control region (CR) and cytochrome oxidase I (COI). The sampling effort was focused along the northern coast of Mindanao where the species was previously reported to have regionally structured stocks. Sequences from online databases were included to expand geographic coverage of the

Long-term (summer 2015–2018 and short-term (summer 2018) water quality monitoring was performed to understand spatial and temporal variations of surface water quality in the Newark Bay Estuary, as well as the Upper New York Bay, parts of the Hudson-Raritan Estuary in the New York–New Jersey metropolitan area. Electrical conductivity (EC), pH, temperature, and dissolved oxygen (DO) were measured in

Copper (Cu) belongs to a class of heavy metals that play an essential part as a cofactor in cellular metabolism, participating in the metabolism of the respiratory chain and iron. It becomes harmful to fish above a certain concentration when its concentration reaches that of the biological requirement. Fish blood is prone to contamination and xenobiotic may be used as toxicity indexes for its alternation

Porites is a major reef building coral genus within coral reef ecosystems, and massive Porites are known to be comparatively resistant to changes in water temperature and pH, and to other environmental disturbances. Pink pigmentation response has often been reported in massive Porites. In this study, around Okinawa, Japan, we not observed only pink but also purple pigmentation response on massive Porites

Monthly mean sea level variations computed using a linear, reduced-gravity, multi-mode model are combined with satellite measurements to explore why Central Pacific (CP) ENSO events occur more frequently since 2000s. The pivot point for sea level (and hence thermocline) variations has shifted westward in response to an increase in zonal wind stress variance in the western equatorial Pacific. As a result

Daya Bay has been greatly influenced by a variety of human disturbances over the last three decades. Because no extremely useful single biotic index for the assessment of ecological status exists, several biotic indices (the AZTI’s marine biotic index (AMBI), the multivariate AZTI’s marine biotic index (M-AMBI), and the taxonomic diversity (TD) index) were applied to more accurately evaluate the current

In southern Brazil, the Southern Black Drum Pogonias courbina is an estuarine-dependent fish, endangered due to intense fishing in the past decades. This study calculated the reproductive parameters, age (A50) and length of first maturation (L50), batch fecundity, total fecundity and extension of the reproductive period of the P. courbina, in order to test the hypothesis of reduction, caused by heavy

Belfast Lough in Northern Ireland like most estuarine systems in the UK and Europe once supported a prolific Ostrea edulis fishery. However, the oyster was considered locally extinct from the Lough by the early 1900s. Numerous ecological surveys of the over the next 100 years failed to document one living specimen. Recently, unsubstantiated sightings of solitary O. edulis along the Loughs intertidal

The presence of non-indigenous barnacles on the north coast of Portugal was reported for the first time on the beginning of the second half of the past century. Since then, there is a lack of information to evaluate changes in the abundance and/or distribution of these barnacles. The aim of this study is to evaluate the current distribution and abundance of non-indigenous species of barnacles in northern

The aim of the study was the assessment of Cystoseira phytocenosis role as a biological barrier in cleaning of seawater in the SPNA Cape Martyan marine area against its pollution with heavy metals (HM: V, Fe, Co, Ni, Cu, Zn, Hg, Mo, Ag, Cd, Sb, Pb) and organochlorine compounds (OCC: DDT, DDE, DDD, ΣDDT, PCB 28, PCB 52, PCB 101, PCB 138, PCB 153, PCB 180). It was deduced that the significant role of

The impact of hypothetical oil spills in Cyclades Islands (Aegean Sea, Eastern Mediterranean) is investigated by a reverse trajectory method whereby tracers have been back-tracked using surface current and wind data from 2013 to 2018. Results show that the westernmost islands of the archipelago (Kithnos, Kea, Andros) are at high risk all year round due to the proximity to the western oil tanker route

Land cover alteration is an important driver of ongoing global environmental change. Developing countries with a fast-growing population have not been able to control a sustainable land-use transition that simultaneously increases both forest cover and agricultural production. Coastal regions of these countries are vulnerable to natural hazards. The present study aims to detect the land cover changes

This study investigated the distribution and utilization of Mytella strigata in the Philippines thru site surveys, focus group discussions, and interviews. Initially reported in Manila Bay in 2014, results showed that this mussel species had spread to provinces mainly in the western and northern sections of Luzon Island. Interviews and focus groups revealed that Asian green mussel and oyster farming

Seagrass meadows are globally recognized as important coastal habitats due to the various ecological functions and ecosystem services they provide. Substantial global decline of seagrass habitats has been recorded over the last decades, underlining the need for extensive studies, including monitoring and mapping these habitats across their distributional range. Cymodocea nodosa (Ucria) Ascherson is

The variability of residual flows and saltwater intrusion was evaluated for the duration of a hurricane-related freshwater pulse in a subtropical estuary, the Suwannee River. Increased rainfall affected the river’s watershed when Hurricane Irma skirted the west coast of Florida in September 2017. The river remained short of reaching flood stages, but the increased river discharge was enough to modify

High fishing pressure on elasmobranchs had caused declines in their populations worldwide, though these declines may not always be observed due to lack of monitoring. The Longnose stingray Hypanus guttatus is one of the most abundant and captured species in Northeast Brazil, mainly as bycatch by shrimp trawl. We aimed to estimate how the population of H. guttatus behaves in the face of different fishing

Mangrove forests are considered as some of the world’s most productive ecosystems. However, these unique ecosystems are under pressure due to natural as well as anthropogenic threats globally. Kerala state, situated on the west coast of India, has lost 95% of the mangroves during the last three decades. The floristic diversity of mangroves in Kerala was represented by 18 species of true mangroves of

The ctenophore Mnemiopsis leidyi, ranking among the 100 most damaging bioinvaders in the world, is a major predator of zooplankton, known to alter the biodiversity and functioning of the ecosystems in which it has been introduced. This first survey on the trophic relationships of M. leidyi in a Mediterranean lagoon (Berre, South of France) was performed through stable isotope analyses. Carbon and nitrogen

Impact of microplastic pollution on the marine environment and its biota is a major concern globally. Gulf of Mannar (GoM) and Palk Bay (PB) are two important biodiversity hotspots along the south–east coast of India. However, in the recent years the intense tourism and fishery activities have made the ecosystem and biota of these two ecologically significant coastal zones vulnerable to microplastic

This study analyzed the concentrations (dry weight basis) and bioaccumulation factors (BAF) of copper (Cu), lead (Pb), cadmium (Cd), and mercury (Hg) in pre- and post-monsoon samples at five stations (Chabahar, Darak, Gowatr, Jask, and Pozm) in the Gulf of Oman. For this purpose, ten samples of hooded oyster Saccostrea cucullata, brown algae Sargassum ilicifolium, and Indian white shrimp Penaeus indicus

Successful conservation, management and aquaculture development of fishery stocks require life-history data, especially for fish that have commercial importance. The black pomfret, Parastromateus niger is one of the commercially important fish species in the Bay of Bengal (BoB) and reproductive biological data are scarce to date. Therefore, to understand the reproductive biology of P. niger, a total

Ctenophores are one of the most conspicuous and frequent groups of the gelatinous zooplankton community, but their regional diversity in tropical and subtropical latitudes remains largely unknown. We provide an overview and update of the current knowledge of the diversity in Mexican seas, including ocean and coastal-neritic environments of the Gulf of Mexico, the Mexican Caribbean Sea, and the Mexican

In the present study we investigated the effects of restoration (northern coast) and anthropization (southern coast) on the spatial and seasonal distribution of ciliates communities in relation to environmental factors in coastal Sfax area. The low pH value was attributed to anthropogenic waste inputs around the southern coast. The nutrients concentrations, recorded in the southern coast, were higher

The Oualidia Lagoon is a semi enclosed marine ecosystem connected to the Atlantic Ocean of Morocco and exposed to human activities, mainly agriculture and oyster farming. The present study aims to characterize the spatio-temporal variation of the phytoplankton assemblage and to highlight the effect of the main environmental parameters on this important planktonic component evolving in a vulnerable

This study aimed to relate the seasonal and spatial variation of phytoplankton to environmental parameters in degraded tropical estuaries in Pernambuco, Northeastern Brazil. Phytoplankton samples and environmental parameters were collected at three stations, namely, Port Basin, Beberibe estuary, and Capibaribe estuary, during the low and high tides. Eighty-six taxa were identified; diatoms were the