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x Marsh, Helene D.; Heinsohn, George Edwin; Glover, Timothy D.
  1984
Changes in the male reproductive organs of the dugong, Dugong dugon (Sirenia: Dugondidae [sic]) with age and reproductive activity.
Austral. Jour. Zool. 32(6): 721-742. 5 tabs. 12 figs.
–Gross and histological studies of 59 male reproductive tracts showed wide variation in testicular activity; many males in a population at any given time seem not to be producing sperm. Differences from and resemblances to other "paenungulates" and other mammals are discussed.

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.)