Effects of Nest Density on Breeding Success in a Colony of Magellanic Penguins (Spheniscus magellanicus)

1990 ◽  
Vol 13 (1) ◽  
pp. 41 ◽  
Author(s):  
Jose Alejandro Scolaro
Keyword(s):  
Breeding Success ◽  
Nest Density ◽  
Spheniscus Magellanicus ◽  
Magellanic Penguins

scholarly journals The effects of human disturbance on Magellanic Penguin Spheniscus magellanicus behaviour and breeding success

1992 ◽  
Vol 2 (3) ◽  
pp. 161-173 ◽  
Author(s):  
Pablo Yorio ◽  
P. Dee Boersma
Keyword(s):  
Breeding Success ◽  
Human Disturbance ◽  
Human Activities ◽  
Tourist Industry ◽  
Magellanic Penguin ◽  
Spheniscus Magellanicus ◽  
Magellanic Penguins ◽  
Patagonian Coast

SummaryMagellanic Penguins Spheniscus magellanicus along the Patagonian coast, Argentina, are increasingly exposed to human activities, especially to a growing tourist industry. We quantified the effects of human visitation and disturbance on the behaviour and breeding of Magellanic Penguins. Nesting penguins differed in their response to human approach, allowing a significantly closer approach before responding with threat and defensive displays in the tourist area than in areas rarely visited by people. When approached during incubation, no penguins abandoned their nest. Breeding success and fledgling weights were similar in the tourist area and non-tourist areas. Magellanic Penguins appear to be tolerant of human visitation, and penguins breeding in the tourist area become accustomed to people walking among their nests. We suggest visitation may be compatible with penguin reproduction if visits are controlled.El Pingüino de Magallanes Spheniscus magellanicus de las costas patagónicas de la Argentina, esta expuesto a las crecientes actividades humanas, especialmente el aumento de la demanda turistica. Se han cuantificado los efectos de las visitas y molestias del hombre en el comportamiento y reproducción de la especie. Los pingüinos mostraron diferencias en su respuesta frent a la proximidad humana, permitiendo un acercamiento signifi-cativamente mayor antes de responder con actitudes defensivas en áreas frecuentadas por los turistas en comparicion con aquellas rara vez visitadas. La proximidad humana durante la época de incubación no supuso en ninguna ocasión el abandono de nidos. El éxito reproductive y los pesos de los jóvenes al abandonar el nido resultaron similares en a l zona turística y en la menos frecuentada. El Pingüino de Magallanes parece tolerar la presencia del hombre, y aquellos que nidifican en el área turistica se habitúan a los visitantes que caminan entre sus nidos. Sugerimos que las visitas pueden ser compatibles con la reproducción de la especie siempre y cuando las mismas estén controladas.

Nest Density and Population Size of Magellanic Penguins (Spheniscus magellanicus) at Cabo Dos Bahias, Argentina

The Auk ◽  
1988 ◽  
Vol 105 (3) ◽  
pp. 585-588 ◽  
Author(s):  
Angel Capurro ◽  
Esteban Frere ◽  
Marcelo Gandini ◽  
Patricia Gandini ◽  
Tomas Holik ◽  
...  
Keyword(s):  
Population Size ◽  
Nest Density ◽  
Spheniscus Magellanicus ◽  
Magellanic Penguins

Health state and reproductive output in Magellanic penguins (Spheniscus magellanicus)

2002 ◽  
Vol 14 (1) ◽  
pp. 19-28 ◽  
Author(s):  
J. Moreno ◽  
P. Yorio ◽  
P. Garcia-Borboroglu ◽  
J. Potti ◽  
S. Villar
Keyword(s):  
Reproductive Output ◽  
Health State ◽  
Spheniscus Magellanicus ◽  
Magellanic Penguins

scholarly journals Occurrence of gastrointestinal parasites in Spheniscus magellanicus (Foster, 1781) located in Pontal do Sul, PR, Brazil

2018 ◽  
Vol 70 (2) ◽  
pp. 491-496
Author(s):  
M.S. Vanhoni ◽  
G.M. Arná ◽  
L.K. Sprenger ◽  
D.L. Vieira ◽  
L.W. Luis ◽  
...  
Keyword(s):  
Gastrointestinal Parasites ◽  
High Rate ◽  
Infected Bird ◽  
Brazilian Coast ◽  
Marine Animals ◽  
Spheniscus Magellanicus ◽  
Control Programs ◽  
Magellanic Penguins ◽  
Rehabilitation Centers ◽  
South Of Brazil

ABSTRACT Gastrointestinal parasitism is the main health problem faced by Spheniscus magellanicus, known as Magellanic penguins, in route on the Brazilian coast. The aim of this research was to report the occurrence and intensity of gastrointestinal parasites in S. magellanicus that reached Pontal do Sul, Paraná, South of Brazil. The study was performed at the Marine Study Center of the Federal University of Parana (CEM-UFPR) with 38 specimens, 31 were necropsied and seven were examined alive with coproparasitological exams. From the necropsied animals, 93.5% (29/31) were parasitized with at least one parasite species. Contracaecum pelagicum was the most prevalent 93,5% (29/31) parasite, followed by Cardiocephaloides physalis (64.5%) and Tetrabothrius lutzi (51.6%). Only one animal was free of parasites and the most infected bird had 1.076 parasites with an average of 194 worms. Willis-Mollay method revealed that 57.1% (4/7) had C. pelagicum eggs. In conclusion, the high rate of gastrointestinal parasites in S. magellanicus confirms the clinical exams, when animals had poor health conditions when they were found in the cost of Paraná. This study provides data to enrich the literature regarding the helminth fauna of the Magellanic penguins, assisting sanitary control programs in Rehabilitation Centers for Marine Animals.

scholarly journals PLASMODIUM RELICTUM AS A CAUSE OF AVIAN MALARIA IN WILD-CAUGHT MAGELLANIC PENGUINS (SPHENISCUS MAGELLANICUS)

1988 ◽  
Vol 24 (4) ◽  
pp. 610-619 ◽  
Author(s):  
Andrew S. Fix ◽  
Cheryl Waterhouse ◽  
Ellis C. Greiner ◽  
Michael K. Stoskopf
Keyword(s):  
Avian Malaria ◽  
Plasmodium Relictum ◽  
Spheniscus Magellanicus ◽  
Magellanic Penguins

scholarly journals Telomeres shorten and then lengthen before fledging in Magellanic penguins (Spheniscus magellanicus)

Aging ◽  
2017 ◽  
Vol 9 (2) ◽  
pp. 487-493 ◽  
Author(s):  
Jack A. Cerchiara ◽  
Rosa Ana Risques ◽  
Donna Prunkard ◽  
Jeffrey R. Smith ◽  
Olivia J. Kane ◽  
...  
Keyword(s):  
Spheniscus Magellanicus ◽  
Magellanic Penguins

Trophic ecology of Magellanic penguins (Spheniscus magellanicus) during the non-breeding period

2018 ◽  
Vol 210 ◽  
pp. 109-122 ◽  
Author(s):  
Fernanda Pinto Marques ◽  
Luis Gustavo Cardoso ◽  
Manuel Haimovici ◽  
Leandro Bugoni
Keyword(s):  
Trophic Ecology ◽  
Breeding Period ◽  
Spheniscus Magellanicus ◽  
Magellanic Penguins

Insights into the Foraging Behavior of Magellanic Penguins (Spheniscus magellanicus)

Waterbirds ◽  
2018 ◽  
Vol 41 (3) ◽  
pp. 332-336 ◽  
Author(s):  
Agustina Gómez-Laich ◽  
Ken Yoda ◽  
Flavio Quintana
Keyword(s):  
Foraging Behavior ◽  
Spheniscus Magellanicus ◽  
Magellanic Penguins

scholarly journals Analysis of hematologic and serum chemistry values of Spheniscus magellanicus with molecular detection of avian malarial parasites (Plasmodium spp.)

2014 ◽  
Vol 34 (12) ◽  
pp. 1236-1242 ◽  
Author(s):  
Sabrina D.E. Campos ◽  
Jeferson R. Pires ◽  
Cristiane L. Nascimento ◽  
Gustavo Dutra ◽  
Rodolpho A. Torres-Filho ◽  
...  
Keyword(s):  
Uric Acid ◽  
Blood Cell ◽  
Avian Malaria ◽  
Negative Impact ◽  
Southeastern Brazil ◽  
Uric Acid Concentration ◽  
Blood Samples ◽  
Spheniscus Magellanicus ◽  
Magellanic Penguins ◽  
Significant Difference

Magellanic penguins (Spheniscus magellanicus) routinely migrate from their breeding colonies to Southern Brazil often contracting diseases during this migration, notably avian malaria, which has been already reported in Brazil and throughout the world. Detection of Plasmodium spp. in blood smears is the routine diagnostic method of avian malaria, however it has a low sensitivity rate when compared to molecular methods. Considering the negative impact of avian malaria on penguins, the aim of this study was to detect the presence of Plasmodium spp. in Magellanic penguins using Polymerase Chain Reaction (PCR) and by verifying clinical, hematological, and biochemical alterations in blood samples as well as to verify the likely prognosis in response to infection. Blood samples were obtained from 75 penguins to determine packed cell volume (PCV), red blood cell (RBC) and white blood cell (WBC) counts, mean corpuscular volume (MCV), uric acid, total protein, albumin, globulin and aspartate aminotransferase (AST) activity levels. Whole blood samples were used for PCR assays. Plasmodium spp. was detected in 32.0% of the specimens using PCR and in 29.3% using microscopic analyses. Anorexia, diarrhea and neurological disorders were more frequent in penguins with malaria and a significant weight difference between infected and non-infected penguins was detected. PCV and MCV rates showed no significant difference. RBC and WBC counts were lower in animals with avian malaria and leukopenia was present in some penguins. Basophil and lymphocyte counts were lower in infected penguins along with high monocyte counts. There was no significant difference in AST activities between infected and non-infected animals. There was a significant increase in uric acid values, however a decrease in albumin values was observed in infected penguins. Based on this study, we concluded that Plasmodium spp. occurs in Magellanic penguins of rehabilitation centers in Southeastern Brazil, compromising the weight of infected animals with clinical alterations appearing in severe cases of this disease. It was also noted that, although the hematological abnormalities presented by these animals may not have been conclusive, leukopenia, monocytosis and the decrease of basophils and lymphocytes revealed an unfavorable prognosis, and Plasmodium spp. infections may progress with elevated uric acid concentration and low albumin levels.

A retrospective analysis of mortality in captive Magellanic penguins ( Spheniscus magellanicus ) in the United States, 2008–2018

Zoo Biology ◽  
2020 ◽  
Vol 39 (6) ◽  
pp. 405-410
Author(s):  
Lana Krol ◽  
Robert P. Moore ◽  
Adrian G. Mutlow ◽  
Sean M. Brady ◽  
Dominick Dorsa
Keyword(s):  
United States ◽  
Retrospective Analysis ◽  
The United States ◽  
Spheniscus Magellanicus ◽  
Magellanic Penguins
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