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A study is presented which provides information on the Chilean dolphin Cephalorhynchus eutropia's occurrence and distribution along the central-southern coast of Chile from January 2000 to March 2001. The dolphins were sighted in 83% of the surveys and the relative abundance was significantly higher in the northern than the southern area. Feeding, socializing and traveling were the three behavior categories being recorded in both areas, but were more frequently observed in the northern area. The study shows a year-round occurrence of these dolphins in the study area which is possibly a critical habitat for the species.

The article presents a study on the lack of divergence in the mitochondrial cytochrome b gene between the Macruronus novaezelandiae and Macruronus magellanicus grenadiers in the Southern Hemisphere. It investigates on the extent of genetic difference between the two putative species by using partial sequences of the mitochondrial deoxyribonucleic acid (DNA) cytochrome b in a phylogenetic analysis and in an analysis of molecular variance (AMOVA).