Inter-Annual Variability in Blue Whale Distribution off Southern Sri Lanka between 2011 and 2012
Abstract
:1. Introduction
2. Methods
2.1. Survey Area
2.2. Satellite Data
2.3. Survey Methodology
2.4. Data Processing and Analysis
3. Results
3.1. Climate Influences
Year | Date | Effort (Distance in km) | Effort (min) | Weather (Beaufort Scale) | n |
---|---|---|---|---|---|
2011 | 13 January | 92 | 340 | 1 | 1 |
9 February | 92 | 360 | 2 | 1 | |
2012 | 20 January | 92 | 367 | 2 | 41 |
4 February | 92 | 393 | 1 | 25 |
3.2. Systematic Survey Data
3.3. Opportunistic Sighting Data
Year | n | ≤1000 m | >1000 m | Mean Distance from Shore (km) |
---|---|---|---|---|
2009 | 53 | 79% | 21% | 11.8 |
2011 | 39 | 20% | 80% | 16.6 |
2012 | 176 | 82% | 18% | 11.6 |
3.4. Temperature and Salinity Data
4. Discussion
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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De Vos, A.; Pattiaratchi, C.B.; Harcourt, R.G. Inter-Annual Variability in Blue Whale Distribution off Southern Sri Lanka between 2011 and 2012. J. Mar. Sci. Eng. 2014, 2, 534-550. https://doi.org/10.3390/jmse2030534
De Vos A, Pattiaratchi CB, Harcourt RG. Inter-Annual Variability in Blue Whale Distribution off Southern Sri Lanka between 2011 and 2012. Journal of Marine Science and Engineering. 2014; 2(3):534-550. https://doi.org/10.3390/jmse2030534
Chicago/Turabian StyleDe Vos, Asha, Charitha B. Pattiaratchi, and Robert G. Harcourt. 2014. "Inter-Annual Variability in Blue Whale Distribution off Southern Sri Lanka between 2011 and 2012" Journal of Marine Science and Engineering 2, no. 3: 534-550. https://doi.org/10.3390/jmse2030534
APA StyleDe Vos, A., Pattiaratchi, C. B., & Harcourt, R. G. (2014). Inter-Annual Variability in Blue Whale Distribution off Southern Sri Lanka between 2011 and 2012. Journal of Marine Science and Engineering, 2(3), 534-550. https://doi.org/10.3390/jmse2030534