Stenella longirostris | Red List of Bangladesh Volume 2: Mammals

Taxa
Stenella longirostris | (Gray, 1828)
Publication
Red List of Bangladesh Volume 2: Mammals
NRL Record ID
327631
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
Delphinus longirostris (Gray, 1828)
Taxonomic Group
Vertebrates
Taxonomic Group Level 2
Mammals
Assessed taxon level
Species
Taxonomic Notes
Perrin (1990) and Perrin et al. (1999) recognized four subspecies: S. l. longirostris (Gray's Spinner), S. l. orientalis (Eastern Spinner), S. l. centroamericana (Central American Spinner) and S. l. roseiventris (Dwarf Spinner Population of Bangladesh is
Taxon distribution as listed in assessment
Spinner Dolphins are pan tropical, occurring in all tropical and subtropical waters around the world between 40°N and 40°S (Jefferson et al. 2008). It is mainly restricted to the Swatch of Noground and pelazic, marine waters with high salinity in the Bay of Bengal.
Habitats and Ecology
Ecological system type
Terrestrial system
No
Freshwater system
No
Marine system
No
Habitat
Habitat details as listed in assessment
Spinner Dolphins spin high in the air and then land with a loud splash, so can be detected from a long distance. Mother-calf bonds are persistence like other dolphins. They are very social and lives in groups. Large school form, break down and reform with different permutations of subgroups in the course of diurnal inshore-offshore and long shore movement related to nocturnal feeding (Culik 2011). They are often found in close association with Pantropical Spotted Dolphins Stenella attenuata.
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
Little is known about the distribution and population size of Stenella longirostris in Bangladesh. Fourteen sightings Stenella longirostris in the northern tip of Swatch of No-ground were reported by BCDP (2008) with mean group size 85. There was no more information available from other marine waters of the Bay of Bengal in Bangladesh territory. Thus it is 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.
URL (link) of redlist assessment or publication
http://iucnredlistbd.org/
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
Data Deficient in Bangladesh (IUCN Bangladesh 2000).
Scientific Name Kingdom Phylum Class Order Family Genus
Stenella longirostris Animalia Chordata Mammalia Cetartiodactyla Delphinidae Stenella