Marine Mammal Ecology and Conservation: A Handbook of by Ian L. Boyd, W. Don Bowen, Sara J. Iverson

By Ian L. Boyd, W. Don Bowen, Sara J. Iverson

Marine mammals command a excessive point of public cognizance, mirrored in particular laws for his or her safety and administration in lots of nations. in addition they current specific demanding situations to ecologists and conservation biologists. they're ordinarily tricky to watch, they occupy an atmosphere that's colossal in its 3 dimensional volume, there are frequently perceived conflicts among marine mammals and other people, and in addition numerous species at the moment are on the subject of extinction.

Marine mammals have a few exciting positive factors of their biology - the facility to dive to crushing depths, to accomplish breath-hold dives that defy our present figuring out of mammalian body structure, and lots of have a capability to seek down prey utilizing refined sonar that we're simply simply commencing to comprehend. Many species even have complicated social constructions. We nonetheless have a lot to profit approximately those awesome animals so a entire and authoritative evaluation of present technique is now well timed. The goal of this ebook is either to summarize the cutting-edge and to inspire innovation and additional development during this learn box.

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These numbered metal cylinders were shot through the blubber into the muscle of whales and recovered when the whales were captured and rendered. Thus, the tags documented the occurrence of whales at two points within their range—the location of tagging and killing. These tags provided some of the first information on movement patterns for some species of whales, but tag return rates were low (<15%). The effects of these tags on the whales were not assessed, but anecdotal accounts suggest that some serious injuries resulted.

These discrete components are methodically recombined to create a conceptual model of the process and highlights critical components (including ethical guidelines, decisions, uncertainties, and endpoints) and the relationships between them. 7 Summary j 15 expected benefits or minimizing possible costs, which can be understood by all stakeholders (Maguire 1987). g. Forrow et al. 1988) and conservation biology (Maguire 1986; Peters et al. 2001). The decision analysis framework can be mainly qualitative, but increasingly decision analyses can be quantitative, providing detailed statistical advice on how to proceed with management efforts (Peters and Marmorek 2001; Peters et al.

1982; Scott et al. 1990a). 3 Photo-identification j 25 hole made under sterile technique with a 6-mm biopsy punch. The tag colour and attachment position on the dorsal fin provide the most useful identification information. Even if a tag is lost, the hole or notch can provide useful identification information. Tag longevities of several years are possible, but most are lost within a few months. Roto tags have been applied to a wide range of delphinids. Other kinds of dorsal fin tags have proved less useful.

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