The Trichodesmium erythraeum is a common colonial marine cyanobacterium in tropical and subtropical oceans. Several authors have reported its importance for the fixation of both atmospheric C and N (CAPONE; CARPENTER, 1982; ZEHR et al., 2001; LUGOMELA et al., 2002; CAPONE et al., 2005). According to Carpenter and Romans (1991), nitrogen fixation by Trichodesmium cells represents an important in...

The call characteristics and distribution of blue whales in the North Pacific were examined by use acoustic surveys. Two distinct vocalisation types have been previously attributed to from limited regions (cf. Thompson Friedl, 1982; Rivers, 1997). Hydrophone data sixteen sites for these whale vocalisations. There geographic seasonal differences between occurrence two types. hydrophones that mor...

Rapid growth in the share of the nation's gross national product devoted to health expenditure has heightened concern over the survival of government entitlement programs and has led to debate of the desirability of current methods of financing health care. In this article, the authors present the data at the heart of the issue, quantifying spending for various types of health care in 1982 and ...