R. Carmona et al., TEMPORARY VARIATION IN THE ABUNDANCE OF R YNCHOPS NIGER (CHARADRIIFORMES, LARIDAE) IN BAJA-CALIFORNIA-SUR, MEXICO, Revista de biologia tropical, 43(1-3), 1995, pp. 313-315
In 1992 and 1993 occurrence of the black skimmer Rynchops niger was re
corded in Chametla and El Conchalito, La Paz Bay. There were 28 record
s in Chametla and 80 in El Conchalito; more in the smaller area perhap
s because it has more resting sites. In 1992 the animals were in repro
ductive season, simultaneously with an ''El Nino'' phenomenon.