Delineating Distance Intervals for Ship-based Seabird Surveys

François Bolduc; André Desbiens

doi:10.1675/063.034.0216

Translator Disclaimer

1 June 2011 Delineating Distance Intervals for Ship-based Seabird Surveys

François Bolduc, André Desbiens

Author Affiliations +

Waterbirds, 34(2):253-257 (2011). https://doi.org/10.1675/063.034.0216

Abstract

A system was developed for the delineation of distance intervals in front of an observer during seabird surveys. Delineation is based on a coordinates system (x.y) with the vanishing point on the horizon being the origin (0:0), within a vertical plane in front of the observer. Coordinates of parallel interval limits can be calculated using y = H x/dp (H = height of the observer's eyes; dp = perpendicular distance between transect centerline and interval limit), and coordinates of radial interval limits using (wp = distance between the observer and the vertical plane in direction of interval limit; dc = observer's distance to the interval limit). The use of the delineation system will help reduce observer-induced variation in seabird at-sea surveys.

Citation Download Citation

François Bolduc and André Desbiens "Delineating Distance Intervals for Ship-based Seabird Surveys," Waterbirds 34(2), (1 June 2011). https://doi.org/10.1675/063.034.0216

Received: 14 September 2010; Accepted: 1 December 2010; Published: 1 June 2011

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Password Forgot your password?

Show

Remember Email on this computer

Remember Password

No BioOne Complete account? Create an account
or Access Institutional Sign In via Shibboleth or OpenAthens

PURCHASE THIS CONTENT

PURCHASE SINGLE ARTICLE

Price: $20.00 ADD TO CART

Includes PDF & HTML, when available

RIGHTS & PERMISSIONS

KEYWORDS/PHRASES

PUBLICATION TITLE:

PUBLICATION YEARS