# Sperm whales at Kaikoura and the effects of whale-watching on their surface and vocal behaviour

> 2005 doctoral thesis by Christoph Friedrich Richter at University of Otago

**Wikidata**: [Q112867388](https://www.wikidata.org/wiki/Q112867388)  
**Source**: https://4ort.xyz/entity/sperm-whales-at-kaikoura-and-the-effects-of-whale-watching-on-their-surface-and-vocal-behaviour


## References

1. [Source](http://hdl.handle.net/10523/10454)