Integrated Taxonomic Information Systemhttp://www.itis.usda.gov/Downloaded April, 2004Refer to the contact information of the datasetKingdomAnimalia202423PhylumChordata158852SubphylumVertebrata331030ClassMammalia179913SubclassTheria179916InfraclassEutheria179925OrderCetacea180403SuborderOdontoceti180404FamilyPhyseteridae180486GenusPhyseter180487SpeciesPhyseter macrocephalus180488 Thirty-eight sightings of sperm whales (<i>Physeter macrocephalus</i>) 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 Pacific Ocean.<br><br> Positive correlations between indices of relative abundance and the anomaly of sea surface temperature were found, although warm events as El Niño appear to increase the uncertainty in sighting rates, reducing correlation values. Positive relationship between indices of relative abundance and fishery's CPUE of <i>Dosidicus gigas</i> suggest some grade of interaction, although the question about the role of <i>D. gigas</i> in the diet of sperm whales in the area must be solved for further conclusions. It is priority to perform specific surveys for population estimation, as well as non-lethal research about feeding and the effect of the fishery competition over sperm whales.To show the general pattern of distribution of sperm whales off Peru, a previously important whaling ground. García-Godos, I2007https://doi.org/10.82144/e303ee62OBIS-SEAMAP386http://seamap.env.duke.edu/dataset/386OBIS-SEAMAPVersion 1.0.0ground condition1995-12-192002-11-09CompleteNone planned-84.0623333-71.4536-3.7388333-18.0476667-84.0623333-71.4536-3.7388333-18.0476667PlatformVesselsSightingsUser definedOpen public unless otherwise noted. See Use Constraints for details.1. Not to use data obtained from OBIS-SEAMAP in any publication, product, or commercial application without proper attribution to the original data provider(s) and OBIS-SEAMAP unless the datasets are explicitly shown under the CC0 policy. Citations or credits are suggested as attribution. If the data you downloaded come from multiple datasets, a citation or credit to each of the datasets is required. Suggested citation for this dataset García-Godos, I. 2007. Sperm whales off Peru during IMARPE surveys (1995-2002). Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/386) on yyyy-mm-dd. Suggested citation for OBIS-SEAMAP: Halpin, P.N., A.J. Read, E. Fujioka, B.D. Best, B. Donnelly, L.J. Hazen, C. Kot, K. Urian, E. LaBrecque, A. Dimatteo, J. Cleary, C. Good, L.B. Crowder, and K.D. Hyrenbach. 2009. OBIS-SEAMAP: The world data center for marine mammal, sea bird, and sea turtle distributions. Oceanography 22(2):104-115 2. To forward the citation of any publication / report that made use of the data / tools provided by OBIS-SEAMAP for inclusion in our list of references. 3. Not to hold OBIS-SEAMAP or the original data providers liable for errors in the data. While we have made every effort to ensure the quality of the database, we cannot guarantee the accuracy of these datasets. 4. The burden for determining fitness for use of the downloaded data for any analyses lies entirely with the user. OBIS-SEAMAP or the original data providers do not support outcomes of your analyses that used the data you downloaded from OBIS-SEAMAP. 5. To consider inclusion of the accompanying transect (effort) dataset if available into the methodology of your analyses. 6. Not to redistribute the data you downloaded from OBIS-SEAMAP through any media without contect from OBIS-SEAMAP and the original data providers unless the datasets are explicitly shown under the CC0 policy.ShapefileGarcía-Godos, I.2006Journal of Cetacean Research and Management8(1):113-119Ignacio García-GodosInstituto del Mar del Perúmailing and physical address

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CallaoPeru(511)4297630 Ext. 258agarcia@imarpe.gob.pe(511) 4200144Instituto del Mar del Perú (IMARPE)Halpin, P.N., A.J. Read, E. Fujioka, B.D. Best, B. Donnelly, L.J. Hazen, C. Kot, K. Urian, E. LaBrecque, A. Dimatteo, J. Cleary, C. Good, L.B. Crowder, and K.D. Hyrenbach2009Oceanography22(2):104-115http://www.tos.org/oceanography/article/obis-seamap-the-world-data-center-for-marine-mammal-sea-bird-and-sea-turtle OBIS-SEAMAPNicholas School of Environment, Duke Univ.mailing and physical address

A328, LSRC

DurhamNC27708USA919-613-8021seamap-contact@duke.eduNot to hold OBIS-SEAMAP liable for errors in the data. While we have made every effort to ensure the quality of the database, we cannot guarantee the accuracy of these datasets. Also please refer to Use Constraints.FreeGo to the OBIS-SEAMAP web sitezipzipped shapefilehttp://seamap.env.duke.edu/dataset/386Ei FujiokaDuke Universitymailing and physical address

LSRC A328

DurhamNCUSA27708efujioka@duke.edu919-613-8021http://www.nbii.gov/Biological Data Profile2007-06-142012-03-28Instituto del Mar del Perú (IMARPE)dateDate of observationlongLongitude of observationlatLatitude of observationobs_countNumber of animals observedspeciesSpecies observedtsnSpecies ITIS TSNsurveycodevesselR/V Humboldt & R/V OlayaoidUnique ID number (generated by SEAMAP)GCS_WGS_1984Decimal degrees0.0001670.000167D_WGS_1984WGS_19846378137.000000298.257224