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Research

2017

285th 21 April., 2017 (Fri.) 14:00~17:00

Hirokazu Toju (Center for Ecological Research, Kyoto University)

Exploring novel interactions in ecosystems

Hiromi Uno (Center for Ecological Research, Kyoto University)

Food webs in the heterogeneous world

284th 24 February., 2017 (Fri.) 14:00~17:00

Yasushi Mitsunaga (Faculty of Agriculture, Kindai University)

Telemetry study on native and alien fish in Lake Biwa for sustainable fishery

We have been conducting telemetry study on fish in Lake Biwa for sustainable fishery. A total of 34 set-receivers are installed around the lake. A 1-channel mobile receiver is installed on a small boat and a 4-channel mobile receiver is installed on a motorboat. Using these receivers, several species of fish attached with ultrasonic transmitters have been tracked including native and alien varieties. Biwa salmon cruised throughout the north basin horizontally and were distributed from the surface to the bottom vertically in the lake. Nigorobuna preferred certain temperature and moved to the preferred temperature area in the south basin during the spawning season. Largemouth bass moved frequently in February, as home ranges were wide, passive fishing, such as gill nets seemed to be effective.

Satoko S. Kimura (Field Science Education and Research Center, Kyoto University)

Passive acoustic monitoring for dolphins and porpoises: a case of finless porpoise living in shallow waters in Asia

Cetaceans, especially coastal dolphins and porpoises, are the top predators in its ecosystem and considered as the key species of environmental impact assessment. They emit family or species specific high frequency sound frequently for navigation and foraging. To take advantage of it, passive acoustic monitoring is getting popular for cetacean census in these couple of decades.

In this presentation, I would like to review the passive acoustic method for dolphins and porpoises using stereo event recording system, called A-tag. As a case study, I will introduce the ecology of finless porpoises revealed by passive acoustic methods.

283rd 20 January., 2017 (Fri.) 14:00~17:00

Masatoshi Murase (Yukawa Institute for Theoretical Physics, Kyoto University)

Challenging to Unknown Situation: Perspectives on the basis of Advanced Future Studies

Globalization must be the double-edged sword. Ironically, globalization is not only the source of problems, but also the mother of creative solutions to these problems. Indeed, major problems of our age - energy, financial security, education, science and environment - are all interrelated and interdependent. These problems are often referred to as “systemic problems”, for they cannot be understood in isolation. However, solutions to these problems can be also found through another globalization such as interdisciplinary communications and discussions. We are encouraged to realize that even though there have been so many different kinds of problems in our world, certain features of the challenges are remarkably consistent. Indeed, we have often been asking the same question: what characteristics make a whole system adaptive to change? It is characteristics of Life itself that must be understood for answering such a common question. It is now time to integrate different concepts, models, and theories among diverse disciplines into a single coherent framework, and thus we can search for simple solutions to complex problems.

Takayuki Ohgushi (Center for Ecological Research, Kyoto University)

Eco-evolutionary dynamics: Studying the past to learn the new things

The interplay between evolution and ecology is critical in bridging the gap between different levels of biological organization in a natural system. Recent development of “eco-evolutionary dynamics” has begun to open a door to a new era of unifying evolution and ecology. The idea of connecting ecological processes and trait evolution is not new, but we can see a root of the eco-evolutionary perspectives in population dynamics studies, which had been flourishingly developed in the 1960-1970’s. As a pioneer work on the eco-evolutionary dynamics, we can appreciate the population dynamics of an herbivorous lady beetle.