By Helene Marsh, Thomas J. O'Shea, John E. Reynolds III III
Dugongs and manatees, the single absolutely aquatic herbivorous mammals, dwell within the coastal waters, rivers and lakes of greater than eighty subtropical and tropical nations. Symbols of fierce conservation battles, sirenian populations are threatened by way of a number of worldwide difficulties. supplying comparative details on all 4 surviving species, this booklet synthesises the ecological and comparable wisdom pertinent to knowing the biology and conservation of the sirenia. It provides specified clinical summaries, masking sirenian feeding biology; replica and inhabitants dynamics; behavioural ecology; habitat specifications and threats to their persevered lifestyles. Outlining the present conservation prestige of the sirenian taxa, this distinct research will equip researchers and execs with the medical wisdom required to advance proactive, precautionary and attainable thoughts to preserve dugongs and manatees. Supplementary fabric is accessible on-line at: www.cambridge.org/9780521888288.
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Extra info for Ecology and Conservation of the Sirenia: Dugongs and Manatees
It was stranded on the dry beach, we cut off meat and fat everywhere in large ... pieces, which with great pleasure we carried to our dwellings. A large part we .. .. stored in barrels. Another part, especially the fat, we hung up on racks. And at ... long last, we found ourselves suddenly spared all trouble about food and .. .. .. capable of continuing the construction of the new ship . ’ .. Excerpt from Steller’s (1751) observations on form and function of the sea cow .. (from the Miller and Miller translation of De Bestiis Marinis) ...
Whole stomach, pylorus and duodenum, swarmed; . .. The pylorus was so ... large and tumid that at first sight I took it for a second stomach . .. There are .. .. more intestines in this animal than in any other . .. The abdominal cavity ... was so full that the abdomen was tumid and swollen like an inflated skin. . .. Hence, when the common coverings and muscles of the abdomen were ... removed and the peritoneum received ever so slight a wound, the wind ... .. came out with such a whistle and hum as it is wont to come from an ...
His relatively good health probably also facilitated his observations of these sirenians. Steller never returned to view his sea cows, and died of fever in Tyumen, Russia, in November 1746 at the age of 37. His shipmates on the voyage found him to be a highly critical intellectual, at times difficult to live with (Michael 1962), a trait that is clearly seen in his published journal. Although reportedly ‘the greatest single factor in causing his death was strong drink’ (Golder 1968, p. 4), Steller was a skilled observer and tireless worker who accomplished much in his short life.