2021 Gray whale abundance in Laguna San Ignacio and Bah?a Magdalena Complex, B.C.S., M?xico
Urb?n R., J., Mart?nez A., S., Ronz?n C., F., Viloria-G?mora, L. and Swartz, S.L.
The winter gray whale occupation of Laguna San Ignacio (LSI) and Bahía Magdalena (BM) in 2021was characterized, similar tothe three previous years (2018-2020),bythedelayed arrival at the lagoonandthe low numbers of calves-of-the-year.In LSIThe highest count of single adult whales was 162 whales on 27 February,similar to those observed in previous winters, with maximum counts ranging from 100 to 200 whales counted.Counts of females with calves remained low throughout the 2021 winter season, with the highestnumber of 19 pairs on 18 March 2021.The highest BMcountswere on 26 February in the most southerly aggregation area of Bahía Almejas with 166 adult whalesand one female-calf pair. In central Bahía Magdalena,counts were greatest on 27 February with 41 adult whales and no calves. In Canal de Santo Domingo,49 single whales and sixfemale-calf pairs were counted on 7 February.