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  • 1
    Electronic Resource
    Electronic Resource
    Eimeria trichechi n.sp. from the Amazonian manatee, Trichechus inunguis (Mammalia: Sirenia) (1983)
    Springer
    Systematic parasitology 5 (1983), S. 287-289 
    Details
    ISSN: 1573-5192
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Eimeria trichechi n.sp. is described and figured from the manatee, Trichechus inunguis, from Amazonas State, north Brazil. Undifferentiated oocysts are passed in the faeces and complete their sporulation in ∼36h at 24 to 26°C. Oocysts are spherical, with a mean size of 13.40 × 13.30 μm. The wall is uni-layered, smooth, colourless and ∼0.5 μm thick; there is no micropyle, oocyst residuum or polar body. Sporocysts are ellipsoidal, with a mean size of 8.65 × 4.62 μm. The sporozoites are longer than the sporocyst and recurved at their ends: there is a sporocyst residuum of fine granules, but no visible Steida body. ac]19821113
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00009162
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Heart rates and gas exchange in the Amazonian Manatee (Trichechus inunguis) in relation to diving (1986)
    Springer
    Journal of comparative physiology 156 (1986), S. 415-423 
    Details
    ISSN: 1432-136X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. Unrestrained Amazonian manatees (Trichechus inunguis) maintained a constant heart rate during diving and exhibited a slight tachycardia during breathing. ‘Forcing’ the manatees to dive caused a marked bradycardia. They exhibited a more pronounced tachycardia during breathing after ‘forced’ dives and hyperventilated during recovery dives. 2. Manatees are capable of dives exceeding 10 min duration without having to resport to anaerobic metabolism, and even after 10 min dives recover within 3–4 short dives. The ability of manatees to make long dives, in spite of relatively poor O2 stores, is due to their low metabolic rate, while the rapid recovery is aided by their high CO2 stores which minimizes CO2 storage in the body. 3. In manatees the changes in alveolar O2 and CO2 pressure ( $$PA_{O_2 } $$ and $$PA_{CO_2 } $$ ) in relation to dive time are slower and more variable than in other marine mammals. The lower rate of change is probably due to the manatees' reduced metabolic rate, while the greater variability is due to their breathing pattern, in which both ventilation and body gas stores influence alveolar gases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01101104
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    Paper (German National Licenses)
    Fulltext
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