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Radiation tolerance in the tardigrade Milnesium tardigradum
Purpose: Tardigrades are known to survive high doses of ionizing radiation. However, there have been no reports about radiation effects in tardigrades under culture conditions. In this study, weExpand
Mating frequency, colony size, polyethism and sex ratio in fungus-growing ants (Attini)
Abstract The mating frequency of queens was estimated for eight attine ant species, Myrmicocrypta ednaella, Apterostigma mayri, Cyphomyrmex costatus, C. rimosus (four lower attines), TrachymyrmexExpand
The feeding ecology and activity budget of proboscis monkeys
A group of proboscis monkeys (Nasalis larvatus) consisting of an alpha‐male, six adult females, and several immatures was observed from May 2005–2006. We collected over 1,968 hr of focal data on theExpand
Correlation among dominance status, metabolic rate and otolith size in masu salmon
In spatial competition between individuals, neither fish sex nor body mass affected dominance status in masu salmon Oncorhynchus masou . In contrast, resting metabolic rate (MR) was significantlyExpand
Clouded leopard (Neofelis diardi) predation on proboscis monkeys (Nasalis larvatus) in Sabah, Malaysia
In this study, we have reported two direct observations of individuals from a one-male group of proboscis monkeys (Nasalis larvatus) being killed by clouded leopards (Neofelis diardi) in the riverineExpand
Relative importance of ballistic and ant dispersal in two diplochorous Viola species (Violaceae)
Viola is one of the diplochorous plant genera that disperse their seeds in two ways, ballistic and ant dispersal. We compared the seed dispersal of two major Viola species of northern Japan, V.Expand
The Asian skunk cabbage Symplocarpus renifolius has an exothermic spadix on which about 100 flowers bloom in very early spring when effective pollinators such as bees and drone flies are inactive.Expand
Social organization in two primitive attine ants,cyphomyrmex rimosus and myrmicocrypta ednaella, with reference to their fungus substrates and food sources
In the Neotropical rainforest of Barro Colorado Island, Panama, social organization and behavior were observed in 2 primitive attine ant species,Myrmicocrypta ednaella andCyphomyrmex rimosus. BothExpand
Effects of ants, ground beetles and the seed-fall patterns on myrmecochory of Erythronium japonicum Decne. (Liliaceae)
Erythronium japonicum (Liliaceae) inhabits deciduous mesic forests of Hokkaido, northern Japan. Myrmecochory of this species was investigated, especially the dispersal frequency, the effect of seedExpand
Establishment of a rearing system of the extremotolerant tardigrade Ramazzottius varieornatus: a new model animal for astrobiology.
Studies on the ability of multicellular organisms to tolerate specific environmental extremes are relatively rare compared to those of unicellular microorganisms in extreme environments. TardigradesExpand