## Bowhead whale, Balaena mysticetus, population size estimated from acoustic and visual census data collected near (1994)

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Citations: | 16 - 7 self |

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@MISC{Raftery94bowheadwhale,,

author = {Adrian E. Raftery and Judith E. Zeh},

title = {Bowhead whale, Balaena mysticetus, population size estimated from acoustic and visual census data collected near},

year = {1994}

}

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### Abstract

Commission). We are very grateful to Andrew A. Scha ner for excellent research assistance. We thank Dr. Thomas F. Albert, Craig George and other scientists and personnel from the Borough's Department of Wildlife Management, the many other researchers with whom we have worked, most of whose names appear on papers in our reference list, the census crew, and the Eskimo hunters of the Borough, for their contributions to our understanding of bowhead whales and the census. We are also grateful to Geof Givens for useful discussions, and to Doug Butterworth and Andre Punt Estimating the population size and rate of increase of bowhead whales, Balaena mysticetus, is important because bowheads were the rst species of great whale for which commercial whaling stopped and so their status indicates the recovery prospects of other great whales, and also because this information is used by the International Whaling Commission (IWC) to set the aboriginal subsistence whaling quota for Alaskan Eskimos. We describe the 1993 visual and acoustic census o Point Barrow, Alaska, which provides the best data available for estimating these quantities. We outline the de nitive version of two statistical methods for estimating the population, the generalized removal method and the Bayes empirical Bayes

### Citations

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Citation Context ...endence of the number of locations on the number of whales present, and the highly dispersed distribution of the latter. However, parameter estimation using the binomial log-likelihood remains valid (=-=McCullagh and Nelder, 1989-=-, p. 126). The standard errors have been adjusted to take account of the over-dispersion. 4.4.4 Tracking Algorithm Parameters and Error Probabilities We estimated ae 1 , the probability that the track... |

48 | Inference from a deterministic population dynamics model for bowhead whales - Raftery, Givens, et al. - 1995 |

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17 | Assessment of the Bering-Chukchi-Beaufort Seas stock ofbowhead whales using the BALEEN II model in a Bayesian synthesis framework. Rep. int - Givens, Zeh, et al. - 1995 |

9 | Distribution and Behavior of the Bowhead Whale, Balaena mysticetus, Based on Analysis of Acoustic Data Collected During the 1993 Spring Migration off of Point - Clark, Mitchell, et al. - 1996 |

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Citation Context ... parameters N , p, p(1 \Gamma p) and (1 \Gamma p) 2 , where p is the sighting probability in the absence of prior notification. The MLEs are N = n 2 1 =(n 1 \Gamma n 2 ) andsp = 1 \Gamma (n 2 =n 1 ) (=-=Seber 1982-=-). Zeh et al. (1986a,b) estimated p for each visibility category and combined the estimated whale numbers at different visibilities. They derived simple corrections for time without watch at one or bo... |

6 | Bayes empirical Bayes estimation of bowhead whale population size based on the visual and acoustical census near - Raftery, Zeh - 1991 |

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5 |
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(Show Context)
Citation Context ... is based on visual census data only, which underlies the generalized removal method described in the next section. 3 The Generalized Removal Method for Estimating Population Size The removal method (=-=Moran 1951-=-; Zippin 1956) was first adapted to bowhead population estimation by Zeh, Ko, Krogman and Sonntag (1986a,b), for analyzing the visual-only bowhead censuses of 1978--1983. In these years, two counting ... |

3 | Numbers and distributions of bowhead whales, Balena mysticetus, based on the 1986 acoustic study off Pt - Clark, Ellison - 1989 |

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3 | Revised Estimates of Bowhead Population Size and Rate of Increase - Zeh, Raftery, et al. - 1996 |

2 | A preliminary account of the acoustic study conducted during the 1985 spring bowhead whale, Balaena mysticetus, migration off Point Barrow, AK. Report International Whaling Commission - CLARK, ELLISON, et al. - 1986 |

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1 |
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(Show Context)
Citation Context .... The census season lasted for 1,041 hours, from April 17 to May 30, 1993. Some of the visual locations in 1993 were from identified whales. Also, a subset of acoustic locations provided call tracks (=-=Clark 1989-=-; Clark, Charif and Colby 1995) of acoustically Kilometers North of Point Barrow -30-20-10 0 -15 -10 -5 0 5 10 15 (a) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... |

1 | Description and evaluation of the 1993 acoustic location method used for the analysis of acoustic data collected during the 1993 spring migration off Point Barrow, Alaska," Paper SC/47/AS23 presented to the IWC Scientific Committee - Clark, Mitchell, et al. - 1995 |

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1 |
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(Show Context)
Citation Context ...g speed (MSS), the allowed deviation from the migration direction (SMd) in the tracking algorithm, and the parameters governing the detection probabilities, (fi V 0 ; fi V 1 ) and (fi A 0 ; fi A 1 ) (=-=Raftery et al. 1988-=-, 1990; Sonntag et al. 1988). The posterior distribution of U is sensitive only to the prior mean of N . In order to assess the sensitivity of the posterior distribution to changes in the model and tr... |

1 |
Bayes empirical Bayes interval estimation of bowhead whale, Balaena mysticetus, population size based upon the 1986 combined visual and acoustic census o Point Barrow, Alaska
- Raftery, Zeh, et al.
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(Show Context)
Citation Context ...g speed (MSS), the allowed deviation from the migration direction (SMd) in the tracking algorithm, and the parameters governing the detection probabilities, (fi V 0 ; fi V 1 ) and (fi A 0 ; fi A 1 ) (=-=Raftery et al. 1988-=-, 1990; Sonntag et al. 1988). The posterior distribution of U is sensitive only to the prior mean of N . In order to assess the sensitivity of the posterior distribution to changes in the model and tr... |

1 |
Parametric sensitivity of a tracking algorithm as applied to the migration of bowhead whales, Balaena mysticetus, near Point Barrow, Alaska
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- 1988
(Show Context)
Citation Context ...deviation from the migration direction (SMd) in the tracking algorithm, and the parameters governing the detection probabilities, (fi V 0 ; fi V 1 ) and (fi A 0 ; fi A 1 ) (Raftery et al. 1988, 1990; =-=Sonntag et al. 1988-=-). The posterior distribution of U is sensitive only to the prior mean of N . In order to assess the sensitivity of the posterior distribution to changes in the model and tracking algorithm parameters... |

1 | A multinomial model for estimating the size of a whale population from incomplete census data - Zeh, Ko, et al. - 1986 |

1 | Statistical considerations in estimating the number of bowhead whales, Balaena mysticetus, from ice-based visual census data - Zeh, Ko, et al. - 1986 |

1 | Rate of increase - Zeh, George, et al. - 1991 |

1 | Assessment of tracking algorithm performance and its effect on population estimates using bowhead whales, Balaena mysticetus, identified visually and acoustically - Zeh, Raftery, et al. - 1990 |

1 | Assessment oftracking algorithm performance and its e ect on population estimates using bowhead whales, Balaena mysticetus, identi ed visually and acoustically - Zeh, Raftery, et al. - 1990 |