47 Result(s)
within
Kentaro Morita
English
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Article
Open AccessLongitudinal trajectories of anterior cingulate glutamate and subclinical psychotic experiences in early adolescence: the impact of bullying victimization
Previous studies reported decreased glutamate levels in the anterior cingulate cortex (ACC) in non-treatment-resistant schizophrenia and first-episode psychosis. However, ACC glutamatergic changes in subjects ...
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Article
Open AccessThe past, present, and a future for native charr in Japan
Charrs (Salvelinus) reach their southernmost distribution in Japan, and are uniquely adapted to the short, steep streams of this island archipelago. Southern Asian Dolly Varden (Salvelinus curilus) occur only in ...
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Article
Open AccessDiverse migration patterns of anadromous white-spotted charr Salvelinus leucomaenis revealed from otolith microchemistry
Anadromous migration of salmonid fish has been extensively studied, primarily focusing on the dichotomous framework of anadromy and residency. However, there remains a limited understanding of intermediate mig...
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Chapter and Conference Paper
Aging Contrast: A Contrastive Learning Framework for Fish Re-identification Across Seasons and Years
The fields of biology, ecology, and fisheries management are witnessing a growing demand for distinguishing individual fish. In recent years, deep learning methods have emerged as a promising tool for image-ba...
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Chapter
Partial Migration in Salmonids: Focusing on Asian Endemic Masu Salmon (Oncorhynchus masou) and White-Spotted Charr (Salvelinus leucomaenis)
Partial migration is perhaps one of the most striking features of life-history polymorphism, in which a population displays both migratory and resident behavior. Not surprisingly, both plasticity and genetics ...
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Article
Open AccessSubcortical volumetric alterations in four major psychiatric disorders: a mega-analysis study of 5604 subjects and a volumetric data-driven approach for classification
Differential diagnosis is sometimes difficult in practical psychiatric settings, in terms of using the current diagnostic system based on presenting symptoms and signs. The creation of a novel diagnostic syste...
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Article
Open AccessLongitudinal structuring of stream-fish assemblages: is niche partitioning observed in two-species systems applicable to three-species systems?
Longitudinal distribution and niche partitioning phenomena have been extensively reported for streams containing two salmonid species but remain poorly understood for streams containing three or more salmonid ...
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Article
Open AccessCerebral cortical structural alteration patterns across four major psychiatric disorders in 5549 individuals
According to the operational diagnostic criteria, psychiatric disorders such as schizophrenia (SZ), bipolar disorder (BD), major depressive disorder (MDD), and autism spectrum disorder (ASD) are classified bas...
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Article
Open AccessAlterations of auditory-evoked gamma oscillations are more pronounced than alterations of spontaneous power of gamma oscillation in early stages of schizophrenia
Several animal models of schizophrenia and patients with chronic schizophrenia have shown increased spontaneous power of gamma oscillations. However, the most robust alterations of gamma oscillations in patien...
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Article
Spawning habitat characteristics and egg mortality in relation to river geomorphology and run-times of chum salmon (Oncorhynchus keta) in a metropolitan river system, northern Japan
We investigated the geomorphology and environmental variables in which early- and late-run chum salmon groups spawn in an urban section of the Toyohira River, northern Japan, in relation to egg mortality, wher...
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Article
Reverse migration of adult pink salmon (Oncorhynchus gorbuscha) to the sea after their return to fresh water
Few studies have examined the movement of adult Pacific salmon Oncorhynchus spp. between the sea and rivers after they have entered a river. In this study, archival tags that recorded temperature and salinity wer...
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Article
Size-selective mortality occurs in smolts during a seaward migration, but not in river residents, in masu salmon (Oncorhynchus masou)
Salmonid fish often experience size-selective mortality when descending the river (i.e., seaward migration). However, it is unknown whether size-selective mortality is specific to this life history (i.e., migr...
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Article
Open AccessCulture-dependent and universal constructs and promoting factors for the process of personal recovery in users of mental health services: qualitative findings from Japan
The conceptualization of personal recovery began in Europe and North America and has spread worldwide. However, the concept of personal recovery in addition to recovery-promoting factors may be influenced by c...
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Article
Size-dependent growth tactics of a partially migratory fish before migration
In many migratory species, smaller migrants suffer higher mortality rates during the risky migration. To minimize the size-selective mortality, migrants with smaller body sizes would need to accelerate growth ...
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Article
Occurrence of mature male white-spotted charr (Salvelinus leucomaenis) in spring, an unusual season
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Article
Open AccessBirth order and prosociality in the early adolescent brain
Birth order is a crucial environmental factor for child development. For example, later-born children are relatively unlikely to feel secure due to sibling competition or diluted parental resources. The positi...
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Article
Open AccessImpaired inhibition of return during free-viewing behaviour in patients with schizophrenia
Schizophrenia affects various aspects of cognitive and behavioural functioning. Eye movement abnormalities are commonly observed in patients with schizophrenia (SZs). Here we examined whether such abnormalitie...
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Article
Mitogen-activated protein kinases are involved in cucurbitacin D-induced antitumor effects on adult T-cell leukemia cells
Adult T cell leukemia (ATL) is an aggressive and malignant blood disease. We previously reported that steroid-structured cucurbitacin D (CuD) induces apoptosis in ATL cells. In this study, we investigated the ...
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Article
Japanese eel at the northern edge: glass eel migration into a river on Hokkaido, Japan
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Chapter
Effects of Dams on Ecological Risk of Inland Fishes
Dams are effective to prevent flood disasters and effectively use water resources. However, the impact on the ecosystem is concerned, such as the dam blocking the movement of organisms upstream and downstream....
