Taxon name
Balaenoptera edeni
Anderson, 1879
Uploaded by
National Red List Database
Taxonomic information
Scientific name
Balaenoptera edeni
Anderson, 1879
Common name(s)
Bryde's Whale, Tropical Whale, Common Bryde's Whale, Eden's Whale, Pygmy Bryde's Whale, Bryde's Whale Complex, Brudarer Timi, Brydes Timi, Timi
Assessed taxon level
Species
Higher level taxonomic groupings
Vertebrates
Mammals
Species authority
Anderson, 1879
Taxonomic notes and synonyms listed
The taxonomic status of the Bryde's Whale is unclear. The smaller form (rarely grows larger than 11.5 meter) compared to ordinary large-type Bryde's Whales (Maximum length 14.6 meter for male and 15.6 meter for female) (Smith et al., 2008a). The smaller
Balaenoptera brydei Olsen, 1913
Location and scope
Specific locality or subnational name or regional name
Bangladesh
Scope (of the Assessment)
National
Countries included within the scope of the assessment
Does the assessment cover a marine EEZ area(s)?
Not_assigned
Conservation Status
Assessed as
Data Deficient
Criteria system used
IUCN
(see Assessment details)
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.
Assessment details
Assessors/contributors/reviewers listed
Md. Zahangir Alom
Criteria system used
IUCN
Reference for methods given
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.
URL (link) of redlist assessment or publication
http://iucnredlistbd.org/
Further information
Endemism (according to assessment)
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.
Is there a map available in assessment?
Yes, in the publication/on website
Habitat and systems
Ecological system type
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.
History
Not assessed (IUCN Bangladesh 2000).
Publication
IUCN Bangladesh. 2015. Red List of Bangladesh Volume 2: Mammals. IUCN, International Union for Conservation of Nature, Bangladesh Country Office, Dhaka, Bangladesh, pp. xvi+232
