Population estimate and distribution pattern of Indian Ocean humpback dolphin in northwestern Persian Gulf

Mohammad Sadeghsaba

doi:10.15468/gu7226

Population estimate and distribution pattern of Indian Ocean humpback dolphin in northwestern Persian Gulf

Citation

Sadeghsaba M, OBIS-SEAMAP (2023). Population estimate and distribution pattern of Indian Ocean humpback dolphin in northwestern Persian Gulf. OBIS-SEAMAP. Occurrence dataset https://doi.org/10.15468/gu7226 accessed via GBIF.org on 2024-12-14.

Description

Original provider: Mohammad Sadeghsaba Dataset credits: Marine & Wetlands Division, Department Of the Environment 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. 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 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"

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

Sampling Description

Study Extent

NA

Sampling

NA

Method steps

NA

Additional info

marine, harvested by iOBIS

Taxonomic Coverages

Scientific names are based on the Integrated Taxonomic Information System (ITIS).

Balaenoptera edeni
common name: Eden's whale rank: species
Sousa plumbea
common name: Indian humpback dolphin rank: species

Geographic Coverages

Iran,Khuzestan,Persian Gulf

Bibliographic Citations

Contacts

Mohammad Sadeghsaba
originator
position: Primary contact
Marine & Wetlands section, Department Of the Environment
email: m.sadeghsaba2@gmail.com

OBIS-SEAMAP
metadata author
Marine Geospatial Ecology Lab, Duke University
A328 LSRC building
Durham
27708
NC
US
email: seamap-contact@duke.edu
homepage: https://seamap.env.duke.edu

OBIS-SEAMAP
distributor
Marine Geospatial Ecology Lab, Duke University
A328 LSRC building
Durham
27708
NC
US
email: seamap-contact@duke.edu
homepage: https://seamap.env.duke.edu

Mohammad Sadeghsaba
owner
position: Primary contact
Marine & Wetlands section, Department Of the Environment
email: m.sadeghsaba2@gmail.com

Mohammad Sadeghsaba
administrative point of contact
position: Primary contact
Marine & Wetlands section, Department Of the Environment
email: m.sadeghsaba2@gmail.com