Back to Search
Start Over
Health evaluation of penguins (Sphenisciformes) following mortality in the Falklands (South Atlantic).
- Source :
-
Diseases of aquatic organisms [Dis Aquat Organ] 2001 Aug 02; Vol. 45 (3), pp. 159-69. - Publication Year :
- 2001
-
Abstract
- In the Falklands, heavy mortality of rock-hopper penguins Eudyptes chrysocome occurred during the 1985-86 breeding season. Starvation was diagnosed as the primary cause of death, possibly caused by a shortage of euphausiid crustaceans (krill) due to unusual meterological conditions. 'Puffinosis' may possibly have been a contributory factor; otherwise no conclusive evidence of infectious disease or toxicosis was found and also no evidence of radioactive contamination. In the 1986-87 breeding season no unusual mortality occurred, but 99 apparently healthy penguins were examined, i.e., rockhoppers Eudyptes chrysocome syn E. crestatus, gentoos Pygoscelis papua and Magellanics Spheniscus magellanicus. Full necropsies were carried out on 54. Tissue examinations were made for cadmium, copper, iron, manganese, mercury, lead and zinc. High tissue cadmium concentrations found in healthy birds in 1987 were similar to those in penguins which died in 1986, and therefore not considered to be of pathological significance. Although there has been no repetition of the unusually hot 1985-86 breeding season in the Falklands, penguins and other seabirds have had fluctuating breeding successes since then. The precise cause, including the roles of meteorological conditions and overexploitation of some forms of prey species, is unclear.
- Subjects :
- Animals
Bird Diseases mortality
Bird Diseases pathology
Breeding
Cadmium analysis
Cause of Death
Falkland Islands epidemiology
Health Status
Metals analysis
Starvation etiology
Starvation mortality
Starvation veterinary
Survival Analysis
Tissue Distribution
Bird Diseases diagnosis
Birds growth & development
Climate
Subjects
Details
- Language :
- English
- ISSN :
- 0177-5103
- Volume :
- 45
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Diseases of aquatic organisms
- Publication Type :
- Academic Journal
- Accession number :
- 11558725
- Full Text :
- https://doi.org/10.3354/dao045159