Balaenoptera edeni | Red List of Bangladesh Volume 2: Mammals

Taxa
Balaenoptera edeni | Anderson, 1879
NRL Record ID
327623
Location
Countries in Assessment
Bangladesh
Country ISO code(s)
BGD
Does the assessment cover a marine EEZ area(s)?
Off
Scope (Assessment)
National
Taxon
RRL Synonyms
Balaenoptera brydei Olsen, 1913
Taxonomic Group
Vertebrates
Taxonomic Group Level 2
Mammals
Assessed taxon level
Species
Taxonomic Notes
The taxonomic status of the Bryde's Whale is unclear. The smaller form (rarely grows larger than 11.5 meter) compared to ordinary¬Ě large-type Bryde's Whales (Maximum length 14.6 meter for male and 15.6 meter for female) (Smith et al., 2008a). The smaller
Taxon distribution as listed in assessment
Tropical and sub-tropical waters throughout the Indian, Atlantic and Pacific Oceans. It is found in the Bay of Bengal (mostly found in Swatch of No-ground) at depth >10 meter in near shore to the offshore marine waters.
Habitats and Ecology
Ecological system type
Terrestrial system
No
Freshwater system
No
Marine system
No
Habitat
Habitat details as listed in assessment
It prefers coastal and marine waters with high salinity (>18.8ppt) and depth >10 meter to the deep offshore. It occurs in groups or as solitary. Surfaces slowly and leaps rarely.
Is there a map available in assessment?
Yes, in the publication/on website
Assessed status
Asessment status in full
Data Deficient
Assessment status abreviation
DD
Assessment rationale/justification
In February 1985, a 13.7 meter long carcass of Balaenoptera sp. was found in the south coast of Cox's Bazar (Sarker 1990). Carcass of Brydes Whale was also found at Mandarbaria on the southwest coast of the Sundarbans in February 2008, and another carcass was found at coast of Barguna district in March 2014. During December 2006 to February 2007, forty sightings of Balaenopterids occurred in and arround the Swatch of No-ground with mean 2.9 individuals (range 1-15) of which six were confirmed Bryde's Whale sightings from photo identification (Smith et al. 2008a). Thus, Bryde's Whales are believed to be distributed throughout the offshore in the Bay of Bengal but there is no estimation of its population size as well as population trends. Thus, this species has been categorized as Data Deficient.
About the assessment
Assessment year
2015
Assessors/contributors/reviewers listed
Md. Zahangir Alom
Affliation of assessor(s)/contributors/reviewers listed on assessment
NGO
Academic
Assessor affiliation specific
Academic|NGO
Criteria system
Criteria system specifics
IUCN v3.1 + Regional Guidelines v4.0
Criteria system used
IUCN
Criteria Citation
IUCN (2012) IUCN Red List Categories and Criteria: Version 3.1. Second edition. Gland, Switzerland and Cambridge, UK: IUCN. iv + 32pp; IUCN (2012) Guidelines for Application of IUCN Red List Criteria at Regional and National Levels: Version 4.0. Gland, Switzerland and Cambridge, UK: IUCN. iii + 41pp.
Endemism
Endemic to region
No
Endemism Notes
Is an endemic?: No
Conservation
Conservation Measures

Conservation measures:
Conservation measures notes:
Required conservation measures:

Further information
History
Not assessed (IUCN Bangladesh 2000).
Scientific Name Kingdom Phylum Class Order Family Genus
Balaenoptera edeni Animalia Chordata Mammalia Cetartiodactyla Balaenopteridae Balaenoptera