Range extension for Sagitta peruviana (Chaetognatha:Sagittoidea) in Bahia Magdalena, Baja California Sur, Mexico

Abstract

In August and September of 1982 we recorded 6 041 and 318 individuals/100 m3 of S. peruviana (Sund, 1961), at 24° 15¢ to 25° 20¢ N and 111° 30¢, to 112° 12¢ W, respectively. It was first described from Perú (Sund, P. N. 1961. Pac. Sci. 15: 1-350) and later found in Colombia (Pineda-Polo, F 1971, p. 309-335 In Costlow (ed.). Fertility of the sea), Panamá (Pineda-Polo, F. 1978. Taxonomy of chaetognaths of the Bight of Panamá... Bol. Dept. Biol. Universidad de Valle, Colombia: 371-439.), Costa Rica, Guatemala (Alvariño, A. 1972. Mem. IV Congr. Nal. Ocean. México: 223-247) and the Gulf of California (summer 1984 A. Esquivel. 1987. Informe Técnico Anual 842567, CICIMAR-IPN, México). This and Esquivels records suggest a considerable range extension to the north eastern Pacific, at least during the summer months, maybe reflecting the "El Niño" 1982-1983 phenomenon.