Seasonal and spatial shifts in feral cat predation on native seabirds vs. non-native rats on Mikura island, Japan.

Azumi, S., Watari, Y., Oka, N., Miyashita, T., (2020). Mammal Research 66(1), 75-82. Springer Berlin, Heidelberg, Germany. English language

Ecological aspects of the invasive rats, Rattus rattus and R. norvegicus on Mikura Island, Japan.

Azumi, S., Oka, N., Watari, Y., (2019). Mammalian Science (Honyuryu Kagaku) 59(1), 85-91. The Mammalogical Society of Japan, Kamigyo-ko, Japan. Japanese language

Diet selectivity and shift of wintering common pochards and tufted ducks in a eutrophic coastal lagoon.

Sekiya, Y., Hiratsuka, J., Yamamuro, M., Oka, N., Abe, M., (2000). Journal of Marine Systems 26(2), 233-238. English language

Predation by diving ducks on the biofouling mussel Musculista senhousia in a euthrophic estuarine lagoon.

Yamamuro, M., Oka, N., Hiratsuka, J., (1998). Marine Ecology Progress Series 174, 101-106. English language

Multiple-site trial of trees for hedgerow intercropping in Indonesia.

Roshetko, J. M., Tucker, G. G., Oka, N., Kamil, S., Wibowo, A., Tambun, I. W., Morkill, W., (1995). Nitrogen Fixing Tree Research Reports 13, 6-9. English language