Laboratory Identification

Pettingill, Olin Sewall

doi:10.1016/b978-0-12-552455-1.50011-3

Cited by 6 publications

(9 citation statements)

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“…If more than 50 chicks were caught, between 50 and 233 chicks per day were measured. Chicks were weighed using 2 kg Pesola scales (10 g increments); the closed wing (Baldwin et al 1931;Pettingill 1985) was measured with a 400 mm (1 mm increments) closed-end ruler; and % down cover on the chicks was estimated as close as possible to 0%, 1%, 5%, 10%, 20%, ..., 90%, 99%, and 100% (where 0% represents no down and 100% represents a complete coverage of down). Whenever possible, weights and measurements were also recorded for any kiaka chicks taken by a muttonbirder but later discarded.…”

Section: Sampling Of Harvested Chicksmentioning

confidence: 99%

Muttonbirder selectivity of sooty shearwater (titi) chicks harvested in New Zealand

Hunter

Møller

Kitson

2000

New Zealand Journal of Zoology

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Sooty shearwater chicks (Puffinus griseus) harvested by Rakiura Maori on Putauhinu Island in the 1997-1999 muttonbirding seasons were larger and more developed than randomly available chicks. Early in the season, when muttonbirders extracted chicks from burrows during the day, this difference may have resulted directly from harvesters selecting areas with higher quality chicks, or indirectly from their selecting higher occupancy or more accessible areas. Later in the season, chicks were harvested after they emerged from burrows at night. Initially, relatively few, light chicks with more developed feathers emerged, and selection between them was relatively weak. As chicks became more abundant, muttonbirders selected heavier, less downy chicks with longer wings. Muttonbirders often rejected small chicks, but there was evidence for selection of larger, more developed chicks even above the estimated reject weight. When undisturbed, higher quality chicks would probably have higher survival and probability of recruitment. Harvesting larger chicks will therefore have a greater impact on the population than randomly harvesting chicks. Models investigating harvest impacts should incorporate chick quality to avoid under-estimating harvest when assessing the long-term sustainability of a culturally important traditional harvest for Rakiura Maori.

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Section: Sampling Of Harvested Chicksmentioning

confidence: 99%

Muttonbirder selectivity of sooty shearwater (titi) chicks harvested in New Zealand

Hunter

Møller

Kitson

2000

New Zealand Journal of Zoology

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“…The features used here to discriminate the proposed taxon are of the same type as those utilized in elevation of other Amazona species. The characters described allow the species to live sympatrically without hybridizing ( Pettingill, 1970 ). This suggests that these three forms are separate species.…”

Section: Discussionmentioning

confidence: 99%

A new parrot taxon from the Yucatán Peninsula, Mexico—its position within genusAmazonabased on morphology and molecular phylogeny

Silva

Guzmán

Urantówka

et al. 2017

PeerJ

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Parrots (Psittaciformes) are a diverse group of birds which need urgent protection. However, many taxa from this order have an unresolved status, which makes their conservation difficult. One species-rich parrot genus is Amazona, which is widely distributed in the New World. Here we describe a new Amazona form, which is endemic to the Yucatán Peninsula. This parrot is clearly separable from other Amazona species in eleven morphometric characters as well as call and behavior. The clear differences in these features imply that the parrot most likely represents a new species. In contrast to this, the phylogenetic tree based on mitochondrial markers shows that this parrot groups with strong support within A. albifrons from Central America, which would suggest that it is a subspecies of A. albifrons. However, taken together tree topology tests and morphometric analyses, we can conclude that the new parrot represents a recently evolving species, whose taxonomic status should be further confirmed. This lineage diverged from its closest relative about 120,000 years ago and was subjected to accelerated morphological and behavioral changes like some other representatives of the genus Amazona. Our phylogenies, which are so far the most comprehensive for Amazona taxa enabled us to consider the most feasible scenarios about parrot colonization of the Greater and Lesser Antilles and Central America from South America mainland. The molecular dating of these migrations and diversification rate were correlated with climatic and geological events in the last five million years, giving an interesting insight into Amazon parrot phylogeography and their evolution in general.

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“…An area defended by a bird or pair of birds against individuals or pairs of its own species can be referred to as territory, and a breeding territory can include areas where mating, nesting, roosting, and feeding by adults and their young may occur (Pettingill 1970). A Whooping Crane pair will often nest in the same marsh where it nested the previous year.…”

Section: Methodsmentioning

confidence: 99%

“…By extrapolation, the same statement can be made for unbanded cranes. The composite nesting areas can be delineated by repeated observations of identifiable (colour-banded) adult cranes and their young, and, as these areas contain the total use area (nesting, roosting, feeding) of a family or pair of cranes, the CNA falls within the definition of home range (total area habitually occupied, Pettingill 1970). I used the terms CNA and home range interchangeably.…”

Section: Methodsmentioning

confidence: 99%

Whooping Crane, Grus americana, home range and breeding range expansion in Wood Buffalo National Park, 1 970-1991

Kuyt

1993

The Canadian Field-Naturalist

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been a remarkable increase in the numbers of juveniles and surviving subadults, and a consequent increase in the breeding _ population. Home ranges were 12.0 -18.9 km? for isolated breeding pairs, but in relatively dense nesting areas varied from 3.2 to 4.2 km*. Mean size of home ranges of 13 identifiable pairs in the three core nesting areas (Sass, Klewi, and Sass-Klewi) was 4.1 km'. Many new pairs began nesting on the peripheries of the existing breeding range along the Sass and Klewi rivers, but at least 12 pairs initiated nesting in other areas. Most of the pioneering breeding pairs occur farther south. Three breeding pairs now nest within the Alberta portion of Wood Buffalo National Park, with the southernmost nesting pair at 59°45'N., 113°20'W. Without habitat degradation in the Park, and in the absence of losses elsewhere along the migration route, the Whooping Crane breeding range should continue to expand, most likely in a southerly direction.

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Laboratory Identification

Cited by 6 publications

References 0 publications

Muttonbirder selectivity of sooty shearwater (titi) chicks harvested in New Zealand

Muttonbirder selectivity of sooty shearwater (titi) chicks harvested in New Zealand

A new parrot taxon from the Yucatán Peninsula, Mexico—its position within genusAmazonabased on morphology and molecular phylogeny

Whooping Crane, Grus americana, home range and breeding range expansion in Wood Buffalo National Park, 1 970-1991

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