Volume 45, No. 1



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Diet of post-breeding Antarctic Shags Phalacrocorax bransfieldensis at Cockburn Island, Antarctic Peninsula


Authors

MARIANELA BELTRÁN1, GABRIELA TAVELLA2 & RICARDO CASAUX3,4

1Centro para el Estudio de Sistemas Marinos (CESIMAR-CENPAT, CONICET), Bv. Brown 2915, (9120) Puerto Madryn, Chubut, Argentina (mbeltran@cenpat-conicet.gob.ar)
2Secretaría de Turismo y Áreas Protegidas, Sarmiento 635, (9200) Esquel, Chubut, Argentina
3Centro de Investigación Esquel de Montaña y Estepa Patagónica (CIEMEP, CONICET-UNPSJB), Roca 780, (9200) Esquel, Chubut, Argentina
4Instituto Antártico Argentino, 25 de Mayo 1143, (1650) General San Martín, Buenos Aires, Argentina


Received 21 October 2016, accepted 25 October 2016

Date Pubished: 2017/04/15
Date Online: 2017/02/28


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Citation

BELTRÁN, M., TAVELLA, G. & CASAUX, R. 2017. Diet of post-breeding Antarctic Shags Phalacrocorax bransfieldensis at Cockburn Island, Antarctic Peninsula. Marine Ornithology 45: 17-19.


Key words: Antarctic Shag, post-breeding diet, Antarctica, demersal fish, regurgitated casts


Abstract

The diet of post-breeding Antarctic shags (Phalacrocorax bransfieldensis) was investigated at Cockburn Island, in the Antarctic Peninsula, through the analysis of pellets collected in February 2015. Demersal-benthic fish were the most frequent and important prey, followed by invertebrates. Among the fish, nototheniids were most abundant in the diet in terms of numbers, whereas channichthyids, Chionodraco rastrospinosus in particular, represented most of the mass. The information provided here differs from that reported for post-breeding individuals belonging to other shag species and for post-breeding Antarctic shags. This article discusses our results and the differences with previous studies, in terms of prey availability among localities.


References

BERNSTEIN, N. & MAXSON, S. 1985. Reproductive energetics of Blue-eyed Shags in Antarctica. Wilson Bulletin 97: 450-462.

BROTHERS, N. 1985. Breeding biology, diet and morphometrics of the king shag (Phalacrocorax albiventer purpurascens) at Macquarie Island. Australian Wildlife Research 12: 81-94. doi:10.1071/WR9850081.

CASAUX, R. 1998. Biología reproductiva y ecología alimentaria del Cormorán Antártico (Phalacrocorax bransfieldensis) (Aves, Phalacrocoracidae) en las Islas Shetland del Sur, Antártida. PhD thesis. La Plata, Argentina: University National of La Plata. 

CASAUX, R., BARONI, A. & BARRERA-ORO, E. 2002. Fish in the diet of the Antarctic shag at four colonies on the Danco Coast, Antarctic Peninsula. Antarctic Science 14: 32-36. doi: 10.1017/S095410200200055X.

CASAUX, R., BARONI, A., RAMÓN, A., BERTOLIN, M. & DI PRINZIO, C.Y. 2009. The diet of post-breeding Antarctic shags (Phalacrocorax bransfieldensis) at the Danco Coast, Antarctic Peninsula. Antarctic Science 21: 221-227. doi:10.1017/S0954102009001746.

CASAUX, R. & BARRERA-ORO, E. 1993. The diet of the blue-eyed shag (Phalacrocorax atriceps bransfieldensis) feeding in the Bransfield Strait. Antarctic Science 5: 335-338. doi:10.1017/S0954102093000458

CASAUX, R. & BARRERA-ORO, E. 2006. Shags in Antarctica: their feeding behaviour and ecological role in the marine food web. Antarctic Science 18: 3-14. doi:10.1017/S0954102006000010.

CASAUX, R., FAVERO, M., CORIA, N. & SILVA, P. 1997. Diet of the Imperial Cormorant (Phalacrocorax atriceps): comparison of pellets and stomach contents. Marine Ornithology 25: 1-4.

CASAUX, R. & RAMÓN, A. 2002.The diet of the South Georgia Shag (Phalacrocorax georgianus) at the South Orkney Islands in five consecutive years. Polar Biology 25: 557-561. doi: 10.1007/s00300-002-0389-4.

ESPITALIER-NOEL, G., ADAMS, N. & KLAGES, N. 1988. Diet of the Imperial Cormorant (Phalacrocorax atriceps) at sub-Antarctic Marion Island. Emu 88: 43-46. doi:10.1071/MU9880043.

FAVERO, M., CASAUX, R., SILVA, P., BARRERA-ORO, E. & CORIA, N. 1998. The diet of the Antarctic Shag during summer at Nelson Island, Antarctica. Condor 100: 112-118. dx.doi.org/doi:10.2307/1369902.

GREEN, K., WILLIAMS, R., WOEHLER, E., BURTON, H., GALES, N. & JONES, R. 1990. Diet of the Heard Island cormorant (Phalacrocorax atriceps nivalis). Antarctic Science 2:139-141. doi:10.1017/S0954102090000177.

ORTA, J. 1992. Family Phalacrocoracidae (Cormorants). In: DEL HOYO, J., ELLIOT, A. & SARGATAL, J. (Eds). Handbook of the Birds of the World, Vol 1. Barcelona, Spain: Lynx Editions.

TOMO, A. 1970. Cadenas tróficas observadas en la bahía de Puerto Paraíso (Península Antártica) en relación con las variaciones de la fertilidad de sus aguas. Contribución Científica del Instituto Antártico Argentino131: 1-14.


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