Version 1
: Received: 29 July 2023 / Approved: 31 July 2023 / Online: 31 July 2023 (08:00:03 CEST)
How to cite:
Van Waerebeek, K.; Barreda-Correa, E. Nearshore Migrating Humpback Whales off Metropolitan Lima, Central Peruvian Coast, Underscore Potential Conflict with Fisheries. Preprints2023, 2023072075. https://doi.org/10.20944/preprints202307.2075.v1
Van Waerebeek, K.; Barreda-Correa, E. Nearshore Migrating Humpback Whales off Metropolitan Lima, Central Peruvian Coast, Underscore Potential Conflict with Fisheries. Preprints 2023, 2023072075. https://doi.org/10.20944/preprints202307.2075.v1
Van Waerebeek, K.; Barreda-Correa, E. Nearshore Migrating Humpback Whales off Metropolitan Lima, Central Peruvian Coast, Underscore Potential Conflict with Fisheries. Preprints2023, 2023072075. https://doi.org/10.20944/preprints202307.2075.v1
APA Style
Van Waerebeek, K., & Barreda-Correa, E. (2023). Nearshore Migrating Humpback Whales off Metropolitan Lima, Central Peruvian Coast, Underscore Potential Conflict with Fisheries. Preprints. https://doi.org/10.20944/preprints202307.2075.v1
Chicago/Turabian Style
Van Waerebeek, K. and Elena Barreda-Correa. 2023 "Nearshore Migrating Humpback Whales off Metropolitan Lima, Central Peruvian Coast, Underscore Potential Conflict with Fisheries" Preprints. https://doi.org/10.20944/preprints202307.2075.v1
Abstract
The notion that ‘Stock-G’ humpback whales off western South America are primarily deep oceanic migrators is poorly supported. We documented66 land-based sightings from Pucusana, Lima Sur:18 incidental (2002–2023) and 48 dedicated sightings during the northbound winter migration (June-July 2023), covering respectively 38 and 105 individual whales, despite a mean daily observer effort of only 58.7 min. Estimated distances from shore ranged 20–7,000 m (mean= 2,729 m) at depths 25–99 m, while 50% migratedat < 2,500 m (median) from shore. Several groups skirted the coastline from headland to headland. Of five southbound migrating groups, four included an adult with neonate;no northbound groups enclosed a neonate. Two cases of single juvenile/subadult whales moving multidirectionally and closely associated with large seabird feeding frenzies, were considered foraging also. In 2023, 94% of all northbound nearshore sightings occurred from 14June-11 July, signalling the maximum threat period for interactions with coastal fisheries off metropolitan Lima. If migration is temporally and spatially predictable, effective mitigating measures should be feasible.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
