Kyoto University, Fisheries, Station, Student

3. Students

INOUE Hiroshi

井上博 顔写真Affiliation: Doctoral candidate, Division of Applied Biosciences, Graduate School of Agriculture
Contact: inoue.hiroshi.55s*st.kyoto-u.ac.jp (replace * by @)
Specialty: Marine ecology
Hobby: fishing, diving, swimming, volleyball, rugby
Research theme: Structure of the benthic ecosystem in the western part of Sea of Japan
Career and Publications: To elucidate the structure of the benthic ecosystem in the Sea of Japan, I identify, enumerate and weigh organisms that are caught in trawl nets at 200-800 m in depth. Based on such data, I quantitatively construct an ecosystem model for the benthic ecosystem in the Sea of Japan. The model will contribute to policy-making for a constant supply of important fisheries products, which may occupy higher trophic levels in the ecosystem.

SASANO Sachia

笹野写真Affiliation: Doctoral candidate, Division of Applied Biosciences, Graduate School of Agriculture
Contact: sasano.sachia.75e*st.kyoto-u.ac.jp (replace * by @)
Specialty: fish ecology
Hobby: keeping many kinds of creatures (from sea anemone to finfish), visiting aquariums
Research theme: Characterization of the life history of black sea bream Acanthopagrus schlegelii using Environmental DNA techniques

I use environmental DNA (eDNA) techniques to study black sea bream Acanthopagrus schlegelii. My master’s thesis focused on seasonal changes in the distribution of eDNA that had been released from black sea bream. The eDNA was dispersed to offshore waters only during the spawning season, whereas in the other seasons it was distributed in coastal and estuarine waters. Moreover, the eDNA was detected in fresh water in a river only during summer. Although black sea bream probably spawns in coastal waters, its spawning has not been confirmed in nature. As coastal waters are subject to fresh water and tidal rhythm, black sea bream may develop a spawning strategy of dealing with low salinity conditions. My doctoral research uses eDNA techniques to reveal the spawning ecology of black sea bream. The final goal is to clarify characteristics of black sea bream in terms of adaptation to coastal waters.
Career and Publications:

SONETAKA Mikihiro

曽根高幹大写真Affiliation: Master’s candidate, Division of Applied Biosciences, Graduate School of Agriculture
Contact: sonetaka.mikihiro.62m*st.kyoto-u.ac.jp (replace * by @)
Specialty: studies on marine bioresources
Hobby: fishing, playing tennis, enjoying anime, watching American football games
Research theme: Environmental DNA released from redspotted grouper Epinephelus akaara: ontogeny of diel rhythms and dynamics during spawning
Redspotted grouper Epinephelus akaara is a high-grade fish, known as ‘Ako’ or ‘Yonezu’. Although the stock of this fish is declining in recent years, there is little information about its ecology, specifically spawning in the natural environment. The present study aims at establishing techniques for both estimation of density and detection of spawning in redspotted grouper using environmental DNA. As a first step, I focus on changes in environmental DNA incidental to diel rhythms, ontogeny and spawning.
Career and Publications:

KAMIMURA Shintaro

上村真太郎写真Affiliation: Master’s candidate, Division of Applied Biosciences, Graduate School of Agriculture
Contact: kamimura.shintaro.22z*st.kyoto-u.ac.jp (replace * by @)
Specialty: studies on marine bioresources
Hobby: taking photographs, painting, reading, fishing
Research theme: Environmental DNA released from Japanese anchovy Engraulis japonicus: dynamics in relation to predation and spawning
Environmental DNA (eDNA) is a promising tool for monitoring, which overcomes drawbacks with conventional techniques. Information about the presence/absence or biomass of a target species can be gained from DNA fragments that are released from the species to the environment. In general, DNA fragments are influenced by many biotic and abiotic factors before detected as eDNA. Examinations of such influential factors will enable us to use the eDNA technique more accurately. The present study focuses on how predation and spawning affect the dynamics of eDNA in Japanese anchovy Engraulis japonicus.
Career and Publications:

NAKAJIMA Hiroto

中島広人写真Affiliation: Master’s candidate, Division of Applied Biosciences, Graduate School of Agriculture
Contact: nakajima.hiroto.57z*st.kyoto-u.ac.jp (replace * by @)
Specialty: ecology of coastal resources
Hobby: fishing, cycling, keeping fish
Research theme: Transport mechanisms of Lateolabrax japonicus eggs and larvae in Tango Bay
The year class strength of fish is determined by starvation, predation and ineffectual transport. Spawning grounds are formed in areas from which eggs and larvae are transported effectively to nursery habitats, while eggs and larvae utilize water currents for effective transport. To understand the early life history and population dynamics of target fish species, it is important to reveal transport mechanisms of eggs and larvae in relation to water currents. The present study aims at correlating transport mechanisms of eggs and larvae to water currents in Tango Bay. The main target specie is Lateolabrax japonicus, a popular fish in commercial and recreational fishing.
Career and Publications:

KOIDE Yuki

小出祐己 顔写真Affiliation: Master’s candidate, Division of Applied Biosciences, Graduate School of Agriculture
Contact: koide.yuki.27e*st.Kyoto-u.ac.jp (replace * by @)
Specialty: Marine ecology
Hobby: diving, underwater photography, playing soccer, visiting aquariums
Research theme: Predation pressure on herbivorous fish by spiny lobster
Iso-yake is a phenomenon that seaweed beds disappear in a short period of time. This phenomenon causes problems such as a loss of nursery grounds for juveniles not only in the coasts of Japan but also all over the world. Excessive feeding by sea urchins and herbivorous fishes such as rabbitfish and parrotfish is considered to be a main cause of Iso-yake. Spiny lobsters have been reported to prey on sea urchins in Japan as well as in other countries and may play an important role in maintaining seaweed beds. Furthermore, there are observations that spiny lobsters preyed on sleeping rabbitfish at night in experimental tanks.

In this study, I verify the potential of spiny lobster as an important predator of fish through an experiment. In experimental tanks, several fish species including rabbitfish are made to encounter lobsters and their behaviors are observed during the day and night. This will explore the possibility that spiny lobster is a predator of herbivorous fishes and functions as an umbrella species in seaweed beds.
Career and Publications:

KONO Yukako

河野ゆか子 顔写真Affiliation: Master’s candidate, Division of Applied Biosciences, Graduate School of Agriculture
Contact: kouno.yukako.35e*st.kyoto-u.ac.jp (replace * by @)
Specialty: Ecology on invertebrates
Hobby: Kung-fu, traveling, eating good meals and drinking
Research theme: Mechanisms of predator avoidance in Japanese sea cucumber
The goal of my study is to reveal behavior and ecology of Japanese sea cucumbers particularly with reference to predators. Sea cucumber is one of the most important fishery resources often used for Japanese cuisine such as “namako-su (sea cucumber sashimi in vinegar)”, and dried sea cucumber has a high commercial value in China as a luxury food stuff. Despite its importance as a fishery resource, little is known of their behavioral ecology. Sea cucumber is known to display different diel activity depending on the presence or absence of predatory fish according to the previous research in our laboratory (Yamaguchi et al. 2016, Fish Sci). Following this, I will investigate the mechanism how they detect their predators by observing behavior under manipulated conditions.
Career and Publications:

FUKUZAWA Hayato

福沢風人 顔写真2Affiliation: Master’s candidate, Division of Applied Biosciences, Graduate School of Agriculture
Contact: fukuzawa.hayato.65e*st.kyoto-u.ac.jp (replace * by @)
Specialty: fish systematics
Hobby: astronomical observation, taraveling by train or airplane, watching football games (especially Kashima Antlers and Real Madrid, NOT playing), cooking (now learning)
Research theme: Taxonomical reexamination of Icelus
Icelus is a genus belonging to cottidae (Perciformes) and found mainly in the sea floor of the Arctic and North Pacific Oceans. Several Icelus species are found in waters close to Japan. My current study subject is description of a new species that is considered to belong to Icelus.

Career and Publications: