Kazuki Yokouchi
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View article: Revisiting the latitudinal cline of catadromy in Japanese eels
Revisiting the latitudinal cline of catadromy in Japanese eels Open
Partial migration of organisms, in which only a subset of a population migrates, plays an important role in life‐history strategies and population resilience in many taxa, yet the mechanisms shaping it under changing environments need furt…
View article: Assessing fish movement and physiological traits along a salinity gradient by measuring stable oxygen isotope values in fish blood water and muscle water
Assessing fish movement and physiological traits along a salinity gradient by measuring stable oxygen isotope values in fish blood water and muscle water Open
Variations in stable oxygen isotopes ( δ 18 O) in the body water of animals reflect changes in δ 18 O values in environmental water and the animals' physiological processes. Euryhaline/anadromous/catadromous fish species move across salini…
View article: Changes in post- and pre-capture escape ability over development in juvenile Japanese eels
Changes in post- and pre-capture escape ability over development in juvenile Japanese eels Open
Predation is one of the major forces driving the evolution of defensive tactics in prey. Recently, post-capture active escape behaviors of different prey animals from the predator’s digestive tract have been reported. However, no studies h…
View article: How Japanese eels escape from the stomach of a predatory fish
How Japanese eels escape from the stomach of a predatory fish Open
Predation shapes diversity in the defensive tactics of prey. One specialized defensive tactic is to escape the digestive system of the predator after capture1,2,3,4
View article: Active swimming and transport by currents observed in Japanese eels (Anguilla japonica) acoustically tracked in the western North Pacific
Active swimming and transport by currents observed in Japanese eels (Anguilla japonica) acoustically tracked in the western North Pacific Open
The mechanisms of oceanic animal migration remain enigmatic. Adult Japanese eels start their long-distance oceanic migration from coastal areas to breed near the West Mariana Ridge. We tracked acoustically tagged eels released in the Kuros…
View article: Management of glass eel fisheries is not a sufficient measure to recover a local Japanese eel population
Management of glass eel fisheries is not a sufficient measure to recover a local Japanese eel population Open
We evaluated whether a strict fisheries management measure of closure of fishing for recruiting juveniles (glass eels) could have resulted in the recovery of a local population of Japanese eels, Anguilla japonica, when there was no harmoni…
View article: Ⅰ-3. Otolith geochemical analysis for studies on migratory ecology of fishes
Ⅰ-3. Otolith geochemical analysis for studies on migratory ecology of fishes Open
View article: Escaping through the predator’s gill cleft: A defensive tactic of juvenile eels after capture by predatory fish
Escaping through the predator’s gill cleft: A defensive tactic of juvenile eels after capture by predatory fish Open
Summary Some prey animals can actively escape from predators even after being captured, but knowledge of such behaviors is still limited, especially in vertebrates. Here, we report the unique active escape behavior of Japanese eel Anguilla…
View article: Important questions to progress science and sustainable management of anguillid eels
Important questions to progress science and sustainable management of anguillid eels Open
Anguillid eels are found globally in fresh, transitional and saline waters and have played an important role in human life for centuries. The population status of several species is now of significant concern. The threats to populations in…
View article: Data1.csv
Data1.csv Open
Summary dataset including the identification and total length of the predator Odontobutis obscura (ID_pred and TL_pred, respectively), the total length of the prey Anguilla japonica (TL_prey), whether the prey was captured (1…
View article: Correction to: Enhanced local recruitment of glass eel Anguilla japonica in Oyodo River, Miyazaki and offshore environmental conditions in 2002
Correction to: Enhanced local recruitment of glass eel Anguilla japonica in Oyodo River, Miyazaki and offshore environmental conditions in 2002 Open
View article: Freshwater eels: A symbol of the effects of global change
Freshwater eels: A symbol of the effects of global change Open
Temperate eels Anguilla anguilla (European eel), A. rostrata (American eel) and A. japonica (Japanese eel) are three catadromous species which have been declining since the 1970s/1980s despite their remarkable adaptive capacity. Because of…
View article: Growth potential can affect timing of maturity in a long-lived semelparous fish
Growth potential can affect timing of maturity in a long-lived semelparous fish Open
Many diadromous fishes such as salmon and eels that move between freshwater and the ocean have evolved semelparous reproductive strategies, but both groups display considerable plasticity in characteristics. Factors such as population dens…
View article: Observations of gut contents of anguilliform leptocephali collected in the western North Pacific
Observations of gut contents of anguilliform leptocephali collected in the western North Pacific Open
ウナギ目葉形仔魚(レプトセファルス)の餌料源を探索するため,西部北太平洋で採集した仔魚26個体の消化管内容物を観察した。いずれの消化管内容物とも,粒径2-10 μmのピコ・ナノプランクトン様の微粒子を多く含み,Alcian Blue染色される多糖類やCoomassie Brilliant Blue染色されるタンパク質で構成された無定形の凝集物であった。本調査結果は,レプトセファルスが外洋に広く存在する植物プランクトン由来のPOMを餌料源のひとつとして利用していることを示唆し…
View article: Demographic survey of the yellow-phase Japanese eel <i>Anguilla japonica</i> in Japan
Demographic survey of the yellow-phase Japanese eel <i>Anguilla japonica</i> in Japan Open
View article: Foreword
Foreword Open