Alimentación de krill Euphausia superba Dana, 1850. Expedición ANTAR XVII

• Main Authors: Castillo Cruz, David, Espinoza, Pepe
• Other Authors: Instituto del Mar del Perú
• Format: Article in Journal/Newspaper
• Language: Spanish
• Published: Instituto del Mar del Perú 2019
• Subjects: ANTAR XVII; Alimentación de Krill; Euphausia superba; Antarctic; Austral; Hora; The Antarctic; Antarc*; Antarctic Krill; Antártida
• Online Access: https://hdl.handle.net/20.500.12958/3400

Se estudió la alimentación del krill antártico Euphausia superba capturado durante la XVII expedición del Perú a la Antártida (ANTAR XVII), en el verano austral de 2007. Se analizaron 445 contenidos gástricos de krill. La dieta estuvo compuesta principalmente de diatomeas Cocconeis sp. (%N= 19,49), Fragilariopsis cylindrus (%N= 15,49), Fragilariopsis rhombica (%N= 10,31) y un tintínido Cymatocylis sp. (%N= 14,88). Análisis como el PCA se aplicaron para determinar cambios a nivel de longitud, hora de captura y profundidad; se observaron asociaciones de 60% en la predominancia numérica de diatomeas como Cocconeis sp. en organismos con tallas mayores a 40 mm. ABSTRACT: The feeding of the Antarctic krill Euphausia superba caught during Peru’s XVII Antarctic Expedition (ANTAR XVII) in the southern summer of 2007 was studied. A total of 445 krill gastric contents were analyzed. The diet was composed mainly of diatoms Cocconeis sp. (%N= 19.49), Fragilariopsis cylindrus (%N= 15.49), Fragilariopsis rhombica (%N= 10.31), and a tintinnid Cymatocylis sp. (%N= 14.88). Analyses such as PCA were applied to determine changes in length, time of catch, and depth; associations of 60% were observed in the numerical predominance of diatoms such as Cocconeis sp. in organisms larger than 40 mm in size. Keywords: feeding