Ian L. Jones

Lux Research (United States)

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Alexander L. Bond

Natural History Museum

Fiona M. Hunter

University of Sheffield

Jeffrey C. Williams

United States Fish and Wildlife Service

Gregory J. Robertson

Environment and Climate Change Canada

Sabir Bin Muzaffar

United Arab Emirates University

G. Vernon Byrd

Consumer VOICE

Heather L. Major

University of New Brunswick

Jennifer L. Lavers

Natural History Museum

Sampath S. Seneviratne

University of Colombo

Anthony J. Gaston

Carleton University

Cooperative Institutions

Memorial University of Newfoundland

Environment and Climate Change Canada

United States Geological Survey

Centre National de la Recherche Scientifique

Northwestern University

University of Sheffield

Harvard University

Fisheries and Oceans Canada

Carleton University

Simon Fraser University

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Assessing the type and frequency of band resighting errors for Razorbill Alca torda with implications for other wildlife studies

Marine ornithology (2008)

Jennifer L. Lavers Ian L. Jones

Visual markers are frequently used in wildlife studies to identify individual animals and to track their behaviour (including movement) and survival. These markers are useful because identification can be made without recapturing individuals, thus minimizing disturbance. However, studies have shown that errors associated with reading and recording markers adversely influence the estimation of population parameters. Using the example of triangular field-readable leg bands on Razorbill Alca torda, we developed a simple experimental protocol for quantifying band resighting error rates and identifying trends in digit misidentifications. The resighting error rate varied from 0.035 to 0.134 depending on observer distance and conditions under which the bands were read. Misidentification of the digits 3 and 5 accounted for more than 48% of all errors made. In our study, 94% of all misread bands corresponded to a valid entry in the banding data base (i.e. misread numbers coincidentally referred to other banded birds), probably because more than 12 000 Razorbills have been banded from one long sequence of band numbers between 1980 and 2007. We conclude that band reading error is a neglected phenomenon that has likely had profound effects on the accuracy of survival studies, and we provide suggestions for minimizing the frequency of such errors.

Identification

Word error rate

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Citations (5)

Parakeet Auklet (Aethia psittacula)

Birds of the World (2020)

Ian L. Jones Nikolai B. Konyukhov Jeffrey C. Williams G. Vernon Byrd

Parakeet

Psittaciformes

Melopsittacus

10.2173/bow.parauk.01

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Colony Departure of Family Groups of Ancient Murrelets

Ornithological Applications (1987)

Ian L. Jones J. Bruce Falls Anthony J. Gaston

Journal Article Colony Departure of Family Groups of Ancient Murrelets Get access Ian L. Jones, Ian L. Jones Department of Zoology, University of Toronto, 25 Harbord St., Toronto, Ontario M5S JAJ, Canada Search for other works by this author on: Oxford Academic Google Scholar J. Bruce Falls, J. Bruce Falls Canadian Wildlife Service, Ottawa, Ontario KIA 0£7, Canada Search for other works by this author on: Oxford Academic Google Scholar Anthony J. Gaston Anthony J. Gaston Canadian Wildlife Service, Ottawa, Ontario KIA 0£7, Canada Search for other works by this author on: Oxford Academic Google Scholar The Condor, Volume 89, Issue 4, 1 November 1987, Pages 940–943, https://doi.org/10.2307/1368551 Published: 01 November 1987 Article history Received: 21 January 1987 Published: 01 November 1987

10.2307/1368551

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Survival Rates of Cassin's and Rhinoceros Auklets at Triangle Island, British Columbia

Ornithological Applications (2000)

Douglas F. Bertram Ian L. Jones Evan G. Cooch Hugh A. Knechtel Fred Cooke

Abstract We estimated survival of Cassin's Auklet (Ptychoramphus aleuticus) and Rhinoceros Auklet (Cerorhinca monocerata) from recapture rates during 1994–1997. For both species, a two “age”-class model provided the best fit. Estimates of local adult survival were significantly lower for Cassin's Auklet (0.672 ± 0.047) than for Rhinoceros Auklet (0.829 ± 0.095). Our estimate of survival appears lower than that required for the maintenance of a stable population of Cassin's Auklets. The available information indicates that a low survival rate and a declining population at Triangle Island are plausible, particularly given the recent large scale oceanographic changes which have occurred in the North Pacific Ocean. Nevertheless, additional mark-recapture data and indexes of population size are required to rigorously demonstrate population declines at the world's largest Cassin's Auklet colony.

Rhinoceros

10.1093/condor/102.1.155

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Citations (5)

DIFFERENT PATTERNS OF PARENTAL EFFORT DURING CHICK-REARING BY FEMALE AND MALE THICK-BILLED MURRES (URIA LOMVIA) AT A LOW-ARCTIC COLONY

Ornithology (2002)

Ian L. Jones Sherrylynn Rowe Steve M. Carr Gail S. Fraser Philip D. Taylor

Using temperature loggers and radio telemetry, foraging and brooding behaviors of female and male Thick-billed Murres (Uria lomvia) were measured during chick rearing at the Gannet Islands, Labrador, to quantify parental roles during this crucial stage of reproduction.We recorded 2,725 foraging dives by 10 females and 7 males during 1,416 bird-hours of monitoring.Our study birds made between 21 and 107 dives per day between 0327 and 2220 hours, with 54% of females' dives and Ͻ1% of males' dives occurring in conditions of low illumination between sunset and sunrise.Males foraged mostly at midday and, overall, made longer and presumably deeper dives (mean duration 116.2 Ϯ 37.6 s) than females (mean duration 84.1 Ϯ 46.0 s).The maximum dive duration recorded was 240 s.Final dives of foraging trips were inferred to include dives during which chick meals (ϳ95% by number daubed shanny [Lumpenus maculatus]) were obtained.Those dives (mean duration 134.0 Ϯ 36.1 s) and dives in final diving bouts prior to return to the breeding site (mean duration 139.1 Ϯ 40.2 s) averaged longer than other dives, and longer in males than in females, but there was no difference between the sexes in their daily frequency.The modal travel time from the last dive in a feeding trip to arrival at the breeding site was 8 min (no difference between sexes), which represents a maximum travel distance at 65 km h Ϫ1 of 8.7 km, suggesting that foraging occurred close to the colony.Females spent 9 h day Ϫ1 (38% of day, mostly diurnal brooding) at breeding sites whereas males spent 16 h (67% of day, mostly nocturnal brooding).Taken together, these data indicated drastic differences in patterns of foraging and brooding behavior between male and female Thick-billed Murres, but suggest that individual and intercolony variation were also significant.

10.1642/0004-8038(2002)119[1064:dpoped]2.0.co;2

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Citations (49)

Whiskered Auklet Asymmetries

Figshare (2023)

Ian L. Jones Fiona Hunter Sampath S. Seneviratne Jeffrey C. Williams Robert Montgomerie

Data and R code for a manuscript on the symmetry of ornmental plumes in the Whiskered Auklet (Aethia pygmaea). In this species males and females display on their faces four elaborate feather ornaments that serve both courtship and mechanosensory functions: three bilateral pairs of white facial plume tracts (superorbital, suborbital, and auricular) and a slender black forehead crest, each comprised of several filoplumes. We studied left-right symmetry in the three antenna-like bilateral white head plumes of 721 wild-caught marked individuals (162 of known sex, 94 of known age that were 1-16 years old) during 1992-2009. We looked for effects of age, sex, body size and condition on ornament asymmetries. We also looked for correlations between population average asymmetries (fluctuating asymmetry) and both ocean climate and measures of survival and productivity in the preceding 2-3 yeasrs.

10.6084/m9.figshare.20301798

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Stability of a Seabird Population in the Presence of an Introduced Predator

Avian Conservation and Ecology (2013)

Heather L. Major Alexander L. Bond Ian L. Jones Cari J. Eggleston

Major, H. L., A. L. Bond, I. L. Jones, and C. J. Eggleston. 2013. Stability of a seabird population in the presence of an introduced predator. Avian Conservation and Ecology 8(1): 2.http://dx.doi.org/10.5751/ACE-00564-080102

10.5751/ace-00564-080102

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Citations (10)

Mating and remating of least auklets (Aethia pusilla) relative to ornamental traits

Behavioral Ecology (1991)

Ian L. Jones Robert Montgomerie

We investigated mating patterns of the least auklet, a small monogamous seabird, at St. Paul Island, Alaska, during three breeding seasons. Least auklets mated assortatively with respect to both plumage color, a trait important in status signaling, and tarsus length, an index of body size. Least auklets mated disassortatively with respect to the extent of facial plumes, but neither assortatively nor disassortatively for any other ornamental trait (bill color, bill ornament size). Mate fidelity was lower in least auklets than in some long-lived seabird species; when both members survived to a following year, only about two-thirds of pairs reunited. Nearly half of the auklets paired in 1 year obtained a new mate in the following year, either because of mate disappearance or divorce. Interyear fidelity to mates was related only to male ornamentation; males with larger facial plumes were more likely to reunite with their mates the next year than males with smaller plumes. There were no significant differences in the ornaments of females in reunited and divorced pairs. Pairs that reunited also had significantly lighter plumage than pairs that divorced, and the plumage of males reuniting with their mates was significantly paler than that of divorced males. We conclude that the probability of both divorce and remating in this species is influenced by ornamental traits. Our finding that remating was related to male plumage color and ornaments is consistent with the idea that remating is influenced by female choice. Pairs that reunited also bred earlier in the season and had higher reproductive success than pairs with experienced individuals breeding together for the first time. We also found evidence that failure to breed in a given year increased the probability of subsequent divorce.

Plumage

Ornaments

Trait

10.1093/beheco/2.3.249

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Citations (36)

PARASITES AND DISEASES OF THE AUKS (ALCIDAE) OF THE WORLD AND THEIR ECOLOGY—A REVIEW

Marine ornithology (2004)

Sabir Bin Muzaffar Ian L. Jones

We reviewed all the organisms that are known to parasitize auks (Aves: Alcidae). Of the 23 extant auk species, parasites have been described from 19 species; no published information was found on parasites of Xantus's Murrelet Synthliboramphus hypoleucus, Craveri's Murrelet S. craveri, the Japanese Murrelet S. wumizusume or the Long-billed Murrelet Brachyramphus perdix. Our survey identified 184 taxa parasitic or pathogenic on auks. Endoparasitic microorganisms included 21 viruses, 13 bacteria, 3 dinoflagellates, 6 protozoa and 3 fungi. Other endoparasitic organisms included 57 platyhelminth (34 digenean, 23 cestode), 9 acanthocephalan and 22 nematode taxa. Ectoparasites (all arthropods) included 2 pentastomid, 14 acari and 30 insect taxa. We reviewed published information on the effects that these parasites have on the biology of auks. Most studies did not investigate relationships between the ecology, the breeding condition or the physiologic state of the birds and the presence of parasites. Even though episodes of mass mortality of seabirds are periodically recorded, few of those episodes have been exclusively linked to parasitic infestations. Viral isolates from auks have been recorded from several breeding colonies, but their epizootiologic consequences are unknown. Bacterial isolates, of which the most noteworthy species is the Lyme disease-causing agent Borrelia burgdorferi (sensu lato), have been recorded in auks and their tick ectoparasite Ixodes uriae. A few life cycles of digeneans and cestodes recorded from auks have been determined. Growing evidence indicates prey switching by auk species alters their endoparasitic fauna. Ectoparasitic organisms often play a role in transmitting endoparasites and may affect the reproductive success of their hosts. Some links have been clearly established; many others are only implied and urgently need close attention. The role of parasitism in host population dynamics and as reservoirs is discussed in the context of seabird ecology as a whole.

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SURVIVAL RATES OF CASSIN'S AND RHINOCEROS AUKLETS AT TRIANGLE ISLAND, BRITISH COLUMBIA

Ornithological Applications (2000)

Douglas F. Bertram Ian L. Jones Evan G. Cooch Hugh A. Knechtel Fred Cooke

We estimated survival of Cassin's Auklet (Ptychoramphus aleuticus) and Rhinoceros Auklet (Cerorhinca monocerata) from recapture rates during 1994–1997. For both species, a two "age"-class model provided the best fit. Estimates of local adult survival were significantly lower for Cassin's Auklet (0.672 ± 0.047) than for Rhinoceros Auklet (0.829 ± 0.095). Our estimate of survival appears lower than that required for the maintenance of a stable population of Cassin's Auklets. The available information indicates that a low survival rate and a declining population at Triangle Island are plausible, particularly given the recent large scale oceanographic changes which have occurred in the North Pacific Ocean. Nevertheless, additional mark-recapture data and indexes of population size are required to rigorously demonstrate population declines at the world's largest Cassin's Auklet colony.

Rhinoceros

10.1650/0010-5422(2000)102[0155:srocsa]2.0.co;2

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Citations (36)