Sperm whales off Peru during IMARPE surveys (1995-2002) ...
Original provider: Instituto del Mar del Perú (IMARPE) Dataset credits: Instituto del Mar del Perú (IMARPE) Abstract: Thirty-eight sightings of sperm whales ( Physeter macrocephalus ) were recorded off Peru (3 degrees S - 18 degrees S) during 21 surveys conducted aboard platforms of opportunity betw...
| Main Author: | |
|---|---|
| Format: | Dataset |
| Language: | English |
| Published: |
OBIS-SEAMAP
2021
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.15468/txahj5 https://www.gbif.org/dataset/655150a1-87a4-4e07-b51b-536d52187fb3 |
| Summary: | Original provider: Instituto del Mar del Perú (IMARPE) Dataset credits: Instituto del Mar del Perú (IMARPE) Abstract: Thirty-eight sightings of sperm whales ( Physeter macrocephalus ) were recorded off Peru (3 degrees S - 18 degrees S) during 21 surveys conducted aboard platforms of opportunity between 1995 and 2002, with a search effort of 33,406.6 nautical miles of observation. Two main areas of concentration were detected: northern Peru (19 sightings) and southern Peru (16 sightings), but seasonality could not be confirmed. Almost 58% of sightings occurred during the same or consecutive days. Group size ranged from 1 to 18 individuals, with a mean of 3.5 individuals (SD = 3.9). The modal group size was one, with single whales accounting for 36.8% of sightings. Groups of three or more individuals accounted for 39.5%. An important increase of sightings occurred between 2001 and 2002, accounting 68% of the records, suggesting migratory movements towards Peruvian waters from other regions of the eastern ... |
|---|