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Distribution patterns of blue whale (Balaenoptera musculus) and shipping off southern Sri Lanka

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Distribution patterns of blue whale (Balaenoptera musculus) and shipping off southern Sri Lanka. / Priyadarshana, T.; Randage, S.M.; Alling, A.; Calderan, S.; Gordon, Jonathan Charles David; Leaper, R.; Porter, L.

In: Regional Studies in Marine Science, Vol. In press, 2015.

Research output: Contribution to journalArticle

Harvard

Priyadarshana, T, Randage, SM, Alling, A, Calderan, S, Gordon, JCD, Leaper, R & Porter, L 2015, 'Distribution patterns of blue whale (Balaenoptera musculus) and shipping off southern Sri Lanka' Regional Studies in Marine Science, vol. In press. https://doi.org/10.1016/j.rsma.2015.08.002

APA

Priyadarshana, T., Randage, S. M., Alling, A., Calderan, S., Gordon, J. C. D., Leaper, R., & Porter, L. (2015). Distribution patterns of blue whale (Balaenoptera musculus) and shipping off southern Sri Lanka. Regional Studies in Marine Science, In press. https://doi.org/10.1016/j.rsma.2015.08.002

Vancouver

Priyadarshana T, Randage SM, Alling A, Calderan S, Gordon JCD, Leaper R et al. Distribution patterns of blue whale (Balaenoptera musculus) and shipping off southern Sri Lanka. Regional Studies in Marine Science. 2015;In press. https://doi.org/10.1016/j.rsma.2015.08.002

Author

Priyadarshana, T. ; Randage, S.M. ; Alling, A. ; Calderan, S. ; Gordon, Jonathan Charles David ; Leaper, R. ; Porter, L. / Distribution patterns of blue whale (Balaenoptera musculus) and shipping off southern Sri Lanka. In: Regional Studies in Marine Science. 2015 ; Vol. In press.

Bibtex - Download

@article{9ba9f62de32644d8a2604c6321e40ea4,
title = "Distribution patterns of blue whale (Balaenoptera musculus) and shipping off southern Sri Lanka",
abstract = "Surveys were conducted off the southern coast of Sri Lanka in 2014 and 2015 to investigate the distribution patterns of blue whales (Balaenoptera musculus spp.) in relation to current shipping lanes, and further offshore. There have been several reported ship strikes of blue whales in this area and the IWC Scientific Committee has recognised the potential for ship strikes to have population level impacts on blue whales in the northern Indian Ocean. A total of 3268km of visual survey effort was conducted on 35 survey days along north-south transects between 5°28'N and 5°53'N. These data were used to model patterns of whale density. The highest densities of blue whales were observed in the current shipping lanes, peaking at an average of 0.1 individuals km-2 along the westbound shipping lane. Automatic Identification System transmissions received by satellite were used to estimate shipping density. Between 80°30'E and 81°E, the peak mean shipping density in the westbound lane of the Traffic Separation Scheme was 1090km-1 year-1 and in the eastbound lane 810km-1 year-1. These high densities of whales combined with one of the busiest shipping routes in the world suggest a severe risk of ship strikes. Previous data on blue whale distribution and coastal upwellings indicate consistent and predictable patterns of whale distribution, suggesting there is considerable potential for effective measures to keep ships and whales apart. For example, data from this study would suggest risk could be reduced by 95{\%} if shipping were to transit 15 nm further south than currently.",
keywords = "Blue whale, Ship strike, Sri Lanka, AIS, Collision risk",
author = "T. Priyadarshana and S.M. Randage and A. Alling and S. Calderan and Gordon, {Jonathan Charles David} and R. Leaper and L. Porter",
year = "2015",
doi = "10.1016/j.rsma.2015.08.002",
language = "English",
volume = "In press",
journal = "Regional Studies in Marine Science",
issn = "2352-4855",
publisher = "Elsevier",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Distribution patterns of blue whale (Balaenoptera musculus) and shipping off southern Sri Lanka

AU - Priyadarshana, T.

AU - Randage, S.M.

AU - Alling, A.

AU - Calderan, S.

AU - Gordon, Jonathan Charles David

AU - Leaper, R.

AU - Porter, L.

PY - 2015

Y1 - 2015

N2 - Surveys were conducted off the southern coast of Sri Lanka in 2014 and 2015 to investigate the distribution patterns of blue whales (Balaenoptera musculus spp.) in relation to current shipping lanes, and further offshore. There have been several reported ship strikes of blue whales in this area and the IWC Scientific Committee has recognised the potential for ship strikes to have population level impacts on blue whales in the northern Indian Ocean. A total of 3268km of visual survey effort was conducted on 35 survey days along north-south transects between 5°28'N and 5°53'N. These data were used to model patterns of whale density. The highest densities of blue whales were observed in the current shipping lanes, peaking at an average of 0.1 individuals km-2 along the westbound shipping lane. Automatic Identification System transmissions received by satellite were used to estimate shipping density. Between 80°30'E and 81°E, the peak mean shipping density in the westbound lane of the Traffic Separation Scheme was 1090km-1 year-1 and in the eastbound lane 810km-1 year-1. These high densities of whales combined with one of the busiest shipping routes in the world suggest a severe risk of ship strikes. Previous data on blue whale distribution and coastal upwellings indicate consistent and predictable patterns of whale distribution, suggesting there is considerable potential for effective measures to keep ships and whales apart. For example, data from this study would suggest risk could be reduced by 95% if shipping were to transit 15 nm further south than currently.

AB - Surveys were conducted off the southern coast of Sri Lanka in 2014 and 2015 to investigate the distribution patterns of blue whales (Balaenoptera musculus spp.) in relation to current shipping lanes, and further offshore. There have been several reported ship strikes of blue whales in this area and the IWC Scientific Committee has recognised the potential for ship strikes to have population level impacts on blue whales in the northern Indian Ocean. A total of 3268km of visual survey effort was conducted on 35 survey days along north-south transects between 5°28'N and 5°53'N. These data were used to model patterns of whale density. The highest densities of blue whales were observed in the current shipping lanes, peaking at an average of 0.1 individuals km-2 along the westbound shipping lane. Automatic Identification System transmissions received by satellite were used to estimate shipping density. Between 80°30'E and 81°E, the peak mean shipping density in the westbound lane of the Traffic Separation Scheme was 1090km-1 year-1 and in the eastbound lane 810km-1 year-1. These high densities of whales combined with one of the busiest shipping routes in the world suggest a severe risk of ship strikes. Previous data on blue whale distribution and coastal upwellings indicate consistent and predictable patterns of whale distribution, suggesting there is considerable potential for effective measures to keep ships and whales apart. For example, data from this study would suggest risk could be reduced by 95% if shipping were to transit 15 nm further south than currently.

KW - Blue whale

KW - Ship strike

KW - Sri Lanka

KW - AIS

KW - Collision risk

U2 - 10.1016/j.rsma.2015.08.002

DO - 10.1016/j.rsma.2015.08.002

M3 - Article

VL - In press

JO - Regional Studies in Marine Science

T2 - Regional Studies in Marine Science

JF - Regional Studies in Marine Science

SN - 2352-4855

ER -

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