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Brazil flats : Articles
Abundance estimate abundance estimates can also be determined through the help of the photo-identification technique (see hammond et al. Furthermore, marine mammal skeletons can be used as educational tools in the local museum, as well as other biological material. Beach surveys will be conducted on bicycles and/or a vehicle and volunteers will rotate. A wide variety of breakfast cerealand yogurt is also available. Some pinniped species also occur only in winter and spring months, carried by the strong and cold northward falkland's current, but others like the sea lions and fur seal (otaria flavescens and arctocephalus australis) have colonies in south brazil. The "health" of an ecosystem can be evaluated by monitoring its top predators.
Brazil flats info: Two indexes will be used: The half-weight index, also known as the s�rensen index, and the simple ratio index, also known as the jaccard index (cairns and schwager 1987). In order to better evaluate the impact of local vessels on tucuxis, observations will be conducted during summer and vacation months, as well as during weekends. Tucuxis are not sexually dimorphic, but there are three ways in which the gender of a frequently observed individual can be determined when attempting to describe their social organization: (1) By obtaining and analyzing skin biopsies of individuals (this is 100% accurate); (2) by observing adult-calf echelon situations (swimming very close together) with the same adult individual on several occasions shows strong evidence that the adult is a female, as maternal care is known to be the rule in cetacean species; (3) by observing an identified individual frequently throughout a long-term study, one can elucidate the gender. See also Vacations to Brazil, and Brazil flats related pages. |
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