Arabian Sea humpback whale tagged off the coast of Oman crosses to India!

In November 2017, a research team led by the Environment Society of Oman (ESO) and Five Oceans Environmental Services placed a satellite tag on a humpback whale in the Gulf of Masirah, Oman. First observed, photographed, and biopsied close to the same site in October 2002, the whale was genetically determined to be a female, and was named Luban – the Arabic word for Frankincense – due to the tree-like pattern in the centre of her tail fluke. She was one of 14 whales to have been satellite tagged off the coast of Oman since 2014, of which only two were females. Tagging was supported through sponsorship from Renaissance Services SAOG.   In the first three weeks following her tag deployment, it appeared that Luban would follow the pattern of previously tagged whales, that all remained in waters off the coast of Oman or Yemen. Around day 21, however, Luban began a journey that would captivate all of the members of the research team and all the members of the Arabian Sea Whale Network for the next several weeks.   True to her name, Luban followed one of the ancient routes of the Frankinsense trade, crossing from Oman to the west coast of India, where she slowly made her way south and has been engaged in small-scale localized movements off the southernmost tip of India since late December.

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Photograph of Luban’s tail flukes. Notice the tree-like pattern in the center, from which her name, the Arabic word for Frankincense tree, is derived.

Research teams on both sides of the Arabian Sea have been speculating as to the reasons behind this ocean crossing. Satellite imagery has revealed areas of high phytoplankton productivity along the west coast of India which is a potential indicator of where prey may be found, and interviews with fishers on the coast are detailing good landings of the one of the humpback’s favoured foods, sardines. However, given that the crossing occurred during the beginning of the population’s breeding season, some are speculating that she may have also been driven by a search for mating or calving grounds rather than feeding opportunities. By late December the overwhelming interest in Luban’s movements motivated a community of marine scientists along the west coast of India to collaborate and conduct fisher interviews as well as boat surveys to try and locate Luban or any other whales in the area, as well as to document the conditions around the area of her track. At the time of writing none of the parties have yet sighted Luban in Indian waters. However another team will begin surveys off the southern tip of India on January 31st to further investigate the waters where the telemetry data indicate she has spent the last month. It is hoped these surveys will feed into regional efforts to better understand the conservation status of this unique population of whales.

Arabian Sea humpback whales were designated as Endangered on the IUCN Red List of Threatened Species in 20081. At the time, reviewers considered the case for a Critically Endangered Status based on the very low numbers and threats documented off the coast of Oman, but decided that too little was known about the rest of the population’s suspected range. Questions have since remained as to whether whales taken on both sides of the Arabian Sea during illegal Soviet whaling operations in the 1960s2 represented a single management unit with frequent exchange, or two separate sub-populations isolated from each other.   Luban’s crossing provides the first recent indication that there may be regular movement between Oman and other areas of the Arabian Sea, and increased efforts to collect opportunistic data from fishing, tourism and coast guard platforms in India and Pakistan indicate that humpback whales are still present on the Eastern side of the Arabian Sea.

Participants to a workshop in Oman introducing a regional online data platform that will facilitate collaboration on whale conservation throughout the Arabian Sea.

The crossing provided extra excitement and motivation for researchers from a number of Arabian Sea humpback whale range states who met in Muscat from January 21-24th for a workshop focusing on the introduction of a new regional online data platform that will facilitate collaboration throughout the region. It has also confirmed that collaborative regional efforts, such as the recently approved Concerted Action under the Convention for Migratory Species are needed to effectively protect and manage this endangered population.

For more information consult Suaad al Harthi of the Environment Society of Oman:, or Andrew Willson, of Five Oceans Environmental Services:


  1. Minton, G. et al. Megaptera novaeangliae, Arabian Sea subpopulation. IUCN Red List of Threatened Species (2008).
  2. Mikhalev, Y. A. Humpback whales Megaptera novaeangliae in the Arabian Sea. Marine Ecology Progress Series 149, 13-21 (1997).


Luban – Renaissance Whale and Dolphin Project 2017 Arabian Sea Humpback Whale Satellite Tagging

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Posted in Arabian Sea Whale Network, Critically Endangered, Endangered, entanglements, Meetings, Red List | Leave a comment

Vaquita rescue efforts suspended

The 10th meeting of CIRVA (Comité Internacional para la Recuperación de la Vaquita) was held at the Southwest Fisheries Science Center in La Jolla, California, on 11-12 December 2017 and the final report of CIRVA-10 (which includes the report of a short meeting of CIRVA (CIRVA Express-3), held in November 2017) as an appendix) is available here.

CIRVA concluded that the vaquita’s status, already dire, was continuing to worsen and that no more than perhaps 30 animals remained as of mid-2017. Results of the 2017 acoustic monitoring program, which is centered in the Vaquita Refuge in the upper Gulf of California, Mexico, were reviewed, as was the outcome of the effort in October-November 2017 to live-capture vaquitas and move them into a safe enclosure (VaquitaCPR). The committee was obliged to accept, with regret, the conclusion of the experts in the VaquitaCPR team and an independent review panel – that the ‘rescue’ effort should be suspended. Having foreclosed the live-capture option to protect vaquitas, CIRVA reinforced and expanded its previous recommendations to the Government of Mexico concerning, among other things:
(i) the need for stronger enforcement and strengthening of fishing regulations, including a complete ban on gillnet possession and use throughout the range of the vaquita;
(ii) continuation of the active removal of gillnets from vaquita habitat; and
(iii) continued acoustic monitoring to track vaquita population trends and evaluate the efficacy of current and future conservation measures.

On the basis of new information on vaquita habitat use obtained during the VaquitaCPR field season and the net removal efforts, a specific new recommendation calls for Mexico to implement ‘enhanced’ enforcement during the current totoaba season (December 2017 through May 2018) in the area believed to have the highest co-occurrence of vaquitas and illegal totoaba gillnets.

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2017 Cetacean Red List Update

Assessments or reassessments of 19 cetacean species, subspecies and populations were published on the IUCN Red List in 2017.  These included all four species of humpback dolphin, the Irrawaddy dolphin, two species of finless porpoise, the South Asian River dolphin, the beluga, the narwhal, and the vaquita among others (see Table 1 for details).  A new “taxon,” the Gulf of Mexico Bryde’s whale, was listed as Critically Endangered (CR).  The Atlantic humpback dolphin was uplisted to CR, and the baiji, vaquita and Taiwanese humpback dolphin (formerly considered a subpopulation, recently described as a subspecies) were all reconfirmed as CR (the baiji again being tagged as “possibly extinct”).  The South Asian River dolphin, Irrawaddy dolphin, narrow-ridged finless porpoise, and Indian Ocean humpback dolphin were all listed as Endangered (EN), while the franciscana, Australian humpback dolphin, Australian snubfin dolphin, Indo-Pacific finless porpoise, and Indo-Pacific humpback dolphin were all listed as Vulnerable (VU).

Summary of reassessments or new assessments published in the 2017-3 (December)* Red List update. (NT = Near Threatened; DD = Data Deficient)* published in September edition of the 2017 Red List

#SpeciesCommon namePopulationCategoryStatus change
1Balaenoptera edeniBrydes whaleBalaenoptera edeni (Gulf of Mexico subpopulation)CRNew listing
2Cephalorhynchus commersoniiCommersons dolphinLCChanged to LC from DD
3Cephalorhynchus eutropiaChilean dolphinNTUnchanged
4Delphinapterus leucasBelugaLCChanged to LC from NT
5Lipotes vexilliferBaiji (Yangtze River dolphin)CR (possibly extinct)Unchanged
6Monodon monocerosNarwhalLCChanged to LC from NT
7Neophocaena asiaeorientalisNarrow-ridged finless porpoiseENChanged to EN from VU
8Neophocaena phocaenoidesIndo-Pacific finless porpoiseVUUnchanged
9Orcaella brevirostrisIrrawaddy dolphinENChanged to EN from VU
10Orcaella heinsohniAustralian snub-fin dolphinVUChanged to VU from NT
11Orcinus orcaKiller whaleDDUnchanged
12Phocoena sinus*VaquitaCRUnchanged
13Platanista gangeticaSouth Asian River dolphinENUnchangd
14Pontoporia blainvilleiFranciscanaVUUnchanged
15Sousa chinensisIndo-Pacific humpback dolphinVUNew assessment of species redefined in relation to newly recognized congeners – changed to VU from NT
16Sousa chinensisSousa chinensis taiwanensis (subspecies)CRNew assessment of subpopulation recently recognized as a subspecies - status unchanged
17Sousa plumbeaIndian Ocean humpback dolphinENNew listing
18Sousa sahulensisAustralian humpback dolphinVUNew listing
19Sousa teusziiAtlantic humpback dolphinCRChanged to CR from VU

All 89 cetacean species and an additional 39 subspecies or subpopulations have been assessed and their status and documentation can be found on the IUCN Red List website (  Of the 89 species, 22% are assigned to a threatened category (i.e. CR, EN, VU, NT) and almost 50% are considered DD (see Table 2).

Table 2. Summary information on Red List status as of December 2017.

Category Species Subspecies/populations Total
Critically Endangered 3 17 20
Endangered 10 9 19
Vulnerable 6 7 13
Near Threatened 1 0 1
Least Concern 25 0 25
Lower Risk/Conservation Dependent* 0 2 2
Data Deficient 44 4 48
Total 89 39 128

*This category is no longer recognized; therefore these assessments are out of date.


Posted in Critically Endangered, Endangered, Red List, Sousa | Leave a comment