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x Marsh, Helene D.; Heinsohn, George Edwin; Channells, Peter W.
  1984
Changes in the ovaries and uterus of the dugong, Dugong dugon (Sirenia: Dugongidae), with age and reproductive activity.
Austral. Jour. Zool. 32(6): 743-766. 4 tabs. 13 figs.
–Gross and histological studies of 49 female reproductive tracts showed extreme flattening of the ovaries, a high frequency of sterile cycles, low fecundity, greater activity of the right ovary than the left, and the presence of ovarian cysts and parasites. The dugong appears to be polyovular and polyestrous. Placental scars are considered the best index to parity. Similarities of reproductive biology between dugongs and elephants are pointed out.

Related Index Records


27 related index terms

Accidental Death or Injury
(SEE ALSO: Conservation; Hunting and Capture; Natural Death or Injury)
x  1984Marsh, Heinsohn & Marsh (DD; Australia; possible biases in shark-net data, 773, 778; survivorship & mortality, 778-780.)
Aerial Surveys of Distribution
x  1984Marsh, Heinsohn & Marsh (DD; Australia; observations of calves; 771-772, 774-776.)
Australia
x  1984cMarsh, H. (DD; Northern Territory; rescue of animals stranded by cyclone; 106-107.)
x  1984Marsh, Heinsohn & Channells (DD; female reproductive tract; 744.)
x  1984Marsh, Heinsohn & Glover (DD; male reproductive tract; 722.)
x  1984Marsh, Heinsohn & Marsh (DD; breeding & population dynamics; 767-788.)
Behavior, Aggregative
(SEE ALSO: Aerial Surveys of Distribution)
x  1984Marsh, Heinsohn & Marsh (DD; Queensland; herd of 63; 775-776.)
Behavior, Agonistic and Territorial
x  1984Marsh, Heinsohn & Marsh (DD; fighting with tusks; 780.)
Behavior, Sexual
(SEE ALSO: Birth and Breeding)
x  1984Marsh, Heinsohn & Marsh (DD; review; 780-781.)
Behavior, Shelter-seeking or Escape
(SEE ALSO: Hunting and Capture; Migration and Movements; Natural Death or Injury; Temperature, Effects of)
x  1984Marsh, Heinsohn & Marsh (DD; calving in shallow water; 780.)
Birth and Breeding
(SEE ALSO: Age Determination; Behavior, Sexual; Population Biology; Urogenital System)
x *1984Marsh, Heinsohn & Channells (DD; female fertility; 743-766.)
x *1984Marsh, Heinsohn & Glover (DD; male fertility; 721-742.)
x *1984Marsh, Heinsohn & Marsh (DD; life history & population dynamics, 767-788; parturition, 773, 788.)
Conservation
(SEE ALSO: Accidental Death or Injury; Economic Uses; Hunting and Capture; Weed Control)
x  1984Marsh, Heinsohn & Marsh (DD; Australia; implications of population dynamics; 785.)
Digestive System
(SEE ALSO: Excretion and Defecation; Food; Mastication; Parasites; Parasitology; Sense Organs)
x  1984Marsh & Eisentraut (DD; palatal ridges; 314-315.)
Dugong dugon (Müller, 1776) Palmer, 1895
x  1984Marsh & Eisentraut ("D. dugong"; palatal ridges; 314-315.)
x  1984cMarsh, H. (Australia; rescue of animals stranded by cyclone; 106-107.)
x *1984Marsh, Heinsohn & Channells (female reproductive tract; 743-766.)
x *1984Marsh, Heinsohn & Glover (male reproductive tract; 721-742.)
x *1984Marsh, Heinsohn & Marsh (reproduction & population dynamics; 767-788.)
Food
(SEE ALSO: Behavior, Ingestive; Captivity, Sirenians in; Digestive System; Food Plants; Weed Control) (NOTE: Plants reported as part of the captive but not the natural diet of sirs. will not necessarily be found under Food Plants. Papers referring to them are, however, indexed here.)
x  1984Marsh, Heinsohn & Marsh (DD; low nutritive value of seagrasses; fertilization of seagrass beds by rain & silt runoff; effects of nutrition on reproduction; 782-784.)
Food Plants: Enhalus acoroides
x  1984Marsh, Heinsohn & Marsh (Australia; 783.)
Histology
(SEE ALSO: Skeleton; other organ systems)
x *1984Marsh, Heinsohn & Channells (DD; female reproductive tract; 751-763.)
x *1984Marsh, Heinsohn & Glover (DD; male reproductive tract; 723-740.)
Hunting and Capture
(SEE ALSO: Accidental Death or Injury; Archeological Sites, Sirenians at; Captivity, Sirenians in; Conservation; Economic Use; Natural Enemies; Weed Control)
x  1984Marsh, Heinsohn & Marsh (DD; Australia; Aborigines' reluctance to kill "wati dangal"; 783.)
Milk
(SEE ALSO: Behavior, Epimeletic; Behavior, Ingestive)
x  1984Marsh, Heinsohn & Channells (DD; lactation; 746-747, 764.)
x  1984Marsh, Heinsohn & Marsh (DD; lactation; 773, 776, 783.)
Natural Death or Injury
(SEE ALSO: Captivity, Sirenians in; Natural Enemies; Pathology; Temperature, Effects of)
x  1984cMarsh, H. (DD; Australia; stranding by cyclone; 106-107.)
Natural Enemies
(SEE ALSO: Natural Death or Injury)
x  1984Marsh, Heinsohn & Marsh (DD; Australia; attack by tiger shark; 788.)
Parasitology
(SEE ALSO: Bacteriology; Community Ecology; Parasites)
x  1984Marsh, Heinsohn & Channells (DD; ovarian parasites; 745-747, 761-762.)
x  1984Marsh, Heinsohn & Marsh (DD; barnacles; 772.)
Pathology
(SEE ALSO: Bacteriology; Biochemistry; Natural Death or Injury; Parasites; Parasitology; Pollution, Effects of; Temperature, Effects of; Teratology; Virology)
x  1984Marsh, Heinsohn & Channells (DD; ovarian cysts, metritis; 749, 762, 764.)
Phylogeny and Affinities of the Sirenia and/or Desmostylia
(SEE ALSO under species)
x  1984Marsh, Heinsohn & Channells (reproductive biology of sirs. similar to proboscideans; 764.)
x  1984Marsh, Heinsohn & Glover (position of testicles, etc., of sirs. similar to proboscideans & hyraces; 738-740.)
x  1984Marsh, Heinsohn & Marsh (trichechid-dugongid separation ?30 million years old; 781.)
Population Biology
(SEE ALSO: Aerial Surveys of Distribution; Age Determination; Birth and Breeding)
x *1984Marsh, Heinsohn & Marsh (DD; Australia; 767-788.)
Salinity Tolerance
(SEE ALSO: Behavior, Ingestive)
x  1984Marsh, Heinsohn & Marsh (DD; ?water-balance stress of lactation; 783.)
Temperature, Effects of
(SEE ALSO: Behavior, Shelter-seeking or Escape; Migration & Movements; Natural Death or Injury; Pollution, Effects of; Thermoregulation)
x  1984Marsh, Heinsohn & Marsh (DD; seasonal breeding; 781-782.)
Trichechus inunguis (Natterer in von Pelzeln, 1883) Thomas and Lydekker, 1897
x  1984Marsh, Heinsohn & Marsh (seasonal calving, comp. w/ DD; 781, 783.)
Trichechus manatus Linnaeus, 1758
x  1984Marsh, Heinsohn & Marsh (reproduction, comp. w/ DD; 771, 781, 784.)
Urogenital System
(SEE ALSO: Excretion and Defecation)
x *1984Marsh, Heinsohn & Channells (DD; female reproductive tract; 743-766.)
x *1984Marsh, Heinsohn & Glover (DD; male reproductive tract; 721-742.)
x  1984Marsh, Heinsohn & Marsh (DD; gonadal activity; 768-771, 776-777, 783-784.)