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Article
Spatial epidemiology model can explain the seasonal dynamics of infectious disease Cyprinid herpesvirus 3 (CyHV-3) by thermoregulation behavior of the host, common carp (Cyprinus carpio)
For ectotherms, habitat temperature is one of the most fundamental factors responsible for disease dynamics. Therefore, temperature-dependent habitat selection of hosts could alter their susceptibility to path...
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Article
Occurrence and disappearance of a non-native goby Rhinogobius sp. OR in relation to hydrological conditions in the Kamo River, southwestern Japan
We monitored the abundance of a non-native (Rhinogobius sp. OR) and two native stream gobies (R. fluviatilis and R. nagoyae) over a decade, from 1995 to 2004, in a fixed reach of a tributary of the Kamo River, so...
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Article
Effect of a non-native freshwater goby invasion on spawning habitat use of two native freshwater gobies
We tracked the spawning habitat use of two native stream gobies (Rhinogobius fluviatilis and Rhinogobius nagoyae) before and during the invasion of a non-native goby (Rhinogobius sp. OR) and after its disappearan...
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Article
Contrasting effects of dams with and without reservoirs on the population density of an amphidromous goby in southwestern Japan
Dam construction affects the distribution and abundance of freshwater fishes, particularly for diadromous species. Amphidromous fishes spawn in rivers, and hatched larvae descend to the sea (or standing water ...
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Article
Temporal variations in phytoplankton biomass over the past 150 years in the western Seto Inland Sea, Japan
We examined fossil pigments in a 210Pb-dated sediment core to document the temporal variations in phytoplankton biomass over the past 150 years in a semi-enclosed bay, Beppu Bay, in the western Seto Inland Sea, J...
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Article
Open AccessDepth segregation and diet disparity revealed by stable isotope analyses in sympatric herbivorous cichlids in Lake Tanganyika
Lake Tanganyika in the African Great Rift Valley is known as a site of adaptive radiation in cichlid fishes. Diverse herbivorous fishes coexist on a rocky littoral of the lake. Herbivorous cichlids have acquir...
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Article
Origin of particulate organic matter in a river with remarkable water pollution in Shikoku Island, Japan
This study on the origin of particulate organic matter (POM) in a river under efficient water use for irrigation in a basin was carried out on the Shin River in Kagawa Prefecture, Japan. The organic pollution ...
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Article
Dual isotope study of food sources of a fish assemblage in the Red River mangrove ecosystem, Vietnam
The food source utilization and trophic relationship of the fish assemblage in the Red River mangrove ecosystem, Vietnam were examined using dual isotope analysis. The carbon and nitrogen stable isotope signat...
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Article
Upwelling-like bottom intrusion enhances the pelagic–benthic coupling by a fish predator in a coastal food web
Upwelling regions where nutrients are transported from deep to surface waters are among the most productive in the oceans. Although it is well known that the upwelling affects fishery production through bottom...
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Article
Sources and Exchange of Particulate Organic Matter in an Estuarine Mangrove Ecosystem of Xuan Thuy National Park, Vietnam
The spatio-temporal variations in stable isotope signatures (δ13C and δ15N) and C/N ratios of particulate organic matter (POM), and physicochemical parameters in a creek water column were examined in an estuarine...
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Article
Historical Profiles of Trace Element Concentrations in Mangrove Sediments from the Ba Lat Estuary, Red River, Vietnam
Historical profiles of trace element concentrations were reconstructed from two mangrove sediment cores collected within the Ba Lat Estuary (BLE), Red River, Vietnam. Chronologies of sediment cores were determ...
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Article
Environment–KHV–carp–human linkage as a model for environmental diseases
To predict outbreaks of infectious disease and to prevent epidemics, it is essential not only to conduct pathological studies but also to understand the interactions between the environment, pathogen, host and...
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Article
The application of δ13C and C/N ratios as indicators of organic carbon sources and paleoenvironmental change of the mangrove ecosystem from Ba Lat Estuary, Red River, Vietnam
In this study, two sediment cores (~70 cm) were collected from separate mangrove forests straddling the Ba Lat Estuary, Red River of northern Vietnam, to examine the origins of sedimentary organic carbon (SOC)...
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Article
Difference in the stable nitrogen isotope ratio of Sargassum piluliferum (Phaeophyceae: Fucales) associated with fish and pearl oyster aquaculture facilities
In order to estimate the nitrogen loading from fish aquaculture facilities, we studied the nitrogen and carbon stable isotope ratios (δ15N and δ13C, respectively) in the brown macroalga Sargassum piluliferum and ...
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Article
Photosynthetic property and primary production of phytoplankton in sublittoral sand bank area in the Seto Inland Sea, Japan
We investigated the photosynthesis–light intensity (P–I) relationships of phytoplankton collected from a sublittoral sand bank in the Seto Inland Sea, Japan, under different temperature conditions. In spite of...
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Article
Biomagnification of Trace Elements in the Aquatic Food Web in the Mekong Delta, South Vietnam Using Stable Carbon and Nitrogen Isotope Analysis
In the present study, we report the concentrations of 21 trace elements (V, Cr, Mn, Co, Cu, Zn, As, Se, Rb, Sr, Mo, Ag, Cd, Sn, Sb, Cs, Ba, Hg, Tl, Pb, and Bi), as well as the results of the analysis of stable...
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Article
Length-weight relationships of two varunid crab species, Helice tridens and Chasmagnathus convexus, in Japan
Estimates of biomass are essential for studies modeling the structure, animal growth, production, and energy flow in ecosystems. The relationships between dry weight and carapace width of two varunid crab spec...
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Article
Comparison of current-velocity tolerance among six stream gobies of the genus Rhinogobius
Tolerance to current velocity was compared among six stream gobies of the genus Rhinogobius (cross-band, dark, large-dark, cobalt, and orange types, and R. flumineus). Each individual of the six gobies was expose...
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Article
Life history and ecology of the glowbelly Acropoma japonicum in the Uwa Sea, Japan
The life history and ecology of the glowbelly Acropoma japonicum a commercially important fishery resource, were investigated in the Uwa Sea, Japan. Newly settled juveniles (0*) appeared at the end of the breedin...
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Article
Feeding ecology of the Pacific Golden Plover (Pluvialis fulva) in the Sg. Labu River on the west coast of the Malay Peninsula
The feeding ecology of the Pacific Golden Plover (Pluvialis fulva) in the Sg. Labu river near the Matang Mangrove Forest Reserve on the west coast of the Malay Peninsula was studied in March and April of 1994. Th...
