Population estimate and distribution pattern of Indian Ocean humpback dolphin in northwestern Persian Gulf
Mohammad Sadeghsaba
Dataset credit
Marine & Wetlands Division, Department Of the Environment
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Contacts
Role | Name | Organization | |
Primary contact |
Mohammad Sadeghsaba |
Marine & Wetlands section, Department Of the Environment |
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Data entry |
Ei Fujioka |
Duke University |
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Citation
Sadeghsaba, M. 2023. Population estimate and distribution pattern of Indian Ocean humpback dolphin in northwestern Persian Gulf. Data downloaded from OBIS-SEAMAP (https://seamap.env.duke.edu/dataset/2255) on yyyy-mm-dd. 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.
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Abstract
The habitat specialist Indian Ocean humpback dolphin (Sousa plumbea) is the second most common cetacean in the Persian Gulf. Mousa Bay in the northwestern Persian Gulf is an important, but highly industrialised habitat for this species. We developed a systematic and comprehensive distance sampling survey carried out from 2014 to 2016 to estimate abundance and population density of humpback dolphin in this bay. To evaluate distribution pattern of the species, eight environmental variables were measured and employed in a zero-inflated generalised additive model (ZINB GAM). With an estimated abundance of 92 animals (64–131, 95% CI) and density of 0.123 animal / km2 (0.086–0.176, 95% CI), our results revealed Mousa Bay as one of the largest population of humpback dolphin in northern latitudes of its global range.
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Purpose
- Studying the abundance, distribution and zoning of dolphin habitats in the coastal waters of Khuzestan - Collecting and producing information about the environmental, ecological, and human characteristics and the most important factors of threats and pressure on the humpback dolphin. - Obtaining demographic information of the species such as group size and proportion of newborns - Obtaining information on the abundance and probability of seeing the species in the study area for use in ecotourism purposes
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Supplemental information
Observation time was not provided. Observations before and after the project implementation period (2014-2016) are also presented. Registered as part of the International Marine Mammal Area under the title "NORTHERN GULF AND CONFLUENCE OF THE TIGRIS, EUPHRATES, AND KURAN IMMA"
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References
Hemamia, M-R, M. Ahmadia, M. Sadegh-Sabab, Moosavi, S. M. H. 2018. Population estimate and distribution pattern of Indian Ocean humpback dolphin (Sousa plumbea) in an industrialised bay, northwestern Persian Gulf. Ecological Indicators. 89: 631-638.
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Attributes
Overview
This section explains attributes included in the original dataset.
OBIS-SEAMAP restricts the attributes available to the public to date/time, lat/lon and species
names/counts only.
Should you need other attributes described here, you are encouraged to contact the data provider.
Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downloadable online. Other attributes may be obtained upon provider's permission.
Attributes in dataset
Attribute (table column) | Description |
oid | Unique ID number (generated by OBIS-SEAMAP) |
record_number | Record number |
scientific_name | Scientific name |
sp_tsn | Taxonomic Serial Number added by OBIS-SEAMAP |
obs_date | Date of the sighting |
obs_time | Time of the sighting (not provided) |
latitude | Latitude in decimal degrees |
longitude | Longitude in decimal degrees |
group_size | Group size |
geom | Geometry field added by OBIS-SEAMAP |
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OBIS-SEAMAP ID | 2255 |
Seabirds | 0 |
Marine mammals | 144 |
Sea turtles | 0 |
Rays and sharks | 0 |
Other species | 0 |
Non spatial | 0 |
Non species | 0 |
Total | 144 |
Date, Begin | 2012-04-09 |
Date, End | 2022-09-09 |
Temporal prec. | 111000 |
Latitude | 29.87 - 30.47 |
Longitude | 48.71 - 49.86 |
Coord. prec. | 4 decimal digits |
Platform | Boat |
Data type | Animal sighting |
Effort | N/A |
if ($show_effort_stat) {
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Traveled (km) | 0 |
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}
if ($sources != null and $sources != "" and $dataset_id != 427) { // Do not show ESAS
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Contr. through | |
}
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Registered | 2023-06-02 |
Updated | 2023-06-05 |
Status | Published |
Sharing policy |
CC-BY-NC (Minimum) |
Shared with |
OBIS
GBIF (via DOI) |
See metadata in static HTML |
See metadata in FGDC XML |
See download history / statistics |
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