Rockhopper and Macaroni Penguin Colonies Absent from Isla Recalada, Chile

Oehler, David A.; Fry, W Roger; Weakley, Leonard A.; Marín, Manuel

doi:10.1676/06-096.1

Cited by 3 publications

(3 citation statements)

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“…2,6 The IUCN notes declines in these population of 34% over the last thirty years that may be attributed to egg collection and other anthropogenic pressures have been recorded. [7][8][9] Hydrocarbon exploitation, interactions with fisheries, climate change, possible competition with increasing pinniped populations and newly developing aquaculture activities involving salmon are additional factors that may have or continue to place pressures on the Southern Rockhopper Penguin. 4,[10][11][12][13][14][15] Mean survival rates in the Southern Rockhopper Penguins, in the Falkland Islands, were 84 to 96%.…”

Section: Introductionmentioning

confidence: 99%

Foraging ranges in Southern Rockhopper Penguins (Eudyptes chrysocome chrysocome) on Isla Noir, Chile

Oehler¹,

LaBruna²,

Marín³

et al. 2018

IJAWB

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The foraging range during the breeding season and Austral winter period of Southern Rockhopper Penguins, Eudyptes c. chrysocome, has been previously documented within colonies along the coast of Argentina and in the Falkland (Malvinas) Islands. We examined annual movement patterns of Southern Rockhopper Penguins to better understand the utilization of their environment in southern Chile. 25 Southern Rockhopper Penguins from Isla Noir were equipped with global location sensors that logged light-levels, water immersion (wet/dry) and sea-surface temperatures (SST) providing daily position, water immersion, and environmental conditions. Five of the penguins were relocated on Isla Noir for data retrieval. Position data were converted into maps of kernel density estimates overlaid with average SST. Study penguins had greatest densities near the colony during the breeding season and dispersed to areas ranging from near the Falkland Islands to areas between 46°S to 57°S and 114°W to 97°W. The penguins utilized areas over the continental shelf during the breeding season and ranged to areas over the ocean basin during the Austral winter period, post-breeding season and molt. Coastal areas along the outer islands were used during the transitional periods between the breeding season and winter period. These data are important in defining the conservation management of the Southern Rockhopper Penguin in relation to fisheries-associated mortality and depletion of food sources.

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Section: Introductionmentioning

confidence: 99%

Foraging ranges in Southern Rockhopper Penguins (Eudyptes chrysocome chrysocome) on Isla Noir, Chile

Oehler¹,

LaBruna²,

Marín³

et al. 2018

IJAWB

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show abstract

“…En Chile, el estado del conocimiento sobre el pingüino de penacho amarillo permite reconocer una población superior a las 378.321 parejas reproductivas presentes en el país (Kirkwood et al 2007, Oehler et al 2008, para las cuales se han descrito al menos 13 sitios de nidificación en islas subantárticas entre los 48º y 56ºS (Bingham & Mejias 1999, Venegas 1999, Kirkwood et al 2007, Oehler et al 2007, Clark 2008, Oehler et al 2008. En isla Noir (54º28'S; 73º00'O) se ha descrito la morfometría de sus huevos, su conducta de buceo y una dieta basada principalmente en pequeños peces pelágicos y cefalópodos (Venegas 1999, Kusch et al 2007, Raya-Rey et al 2009).…”

Section: Introductionunclassified

“…En isla Noir (54º28'S; 73º00'O) se ha descrito la morfometría de sus huevos, su conducta de buceo y una dieta basada principalmente en pequeños peces pelágicos y cefalópodos (Venegas 1999, Kusch et al 2007, Raya-Rey et al 2009). Mientras que en isla Recalada (53º17'S; 74°20'O) se describió la drástica disminución de la población nidificante, la cual desde 10.013 parejas en 1989 terminó con su completa desaparición en 2005, relacionando preliminarmente la causa de este fenómeno a perturbaciones humanas y cambio climático (Oehler et al 2007). …”

Section: Introductionunclassified