Jump to content

File:Desenvolvimento dos filhotes Anodorhynchus hyacinthinus.jpg

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia

Original file (1,775 × 1,338 pixels, file size: 560 KB, MIME type: image/jpeg)

Summary

Description
English: Development phases of the chicks: (A) nestling, 0–25 days, birds on picture are 17 and 18 days, respectively. Mass gain at this phase is slow, (B) chick, 26–77 days, birds on picture are 44 and 45 days, respectively, (C) chicks, birds on picture are 61 and 62 days, respectively. Geometric growth until maximum weight is attained, (D) juvenile, 78–107 days, birds on pictures are 104 and 105 days, respectively. Weight is maintained up to 90–95 days when weight loss begins with the first attempts of flying.
Abstract: Studies on the breeding of vulnerable and endangered bird species are hindered by low numbers of individuals, inaccessible location of nests, unfavourable environmental conditions, and complex behavioural patterns. In addition, intraspecific variation may emerge only following long-term, systematic observations of little-known patterns and processes. Here, data collected over 30 years were used to determine growth model of hyacinth macaw (Anodorhynchus hyacinthinus) chicks in the Pantanal biome of Brazil. During this period, the speed of growth and body mass of chicks varied widely. Four growth models were tested: logistic, Gompertz, Richards, and cubic polynomial. They were fitted using three biometric measurements: body mass, total length, and tail length. The best-fitting growth curves were identified using Akaike’s information criterion. The best models were the cubic polynomial for body mass, Richards for total length, and Gompertz for tail length. We confirmed the occurrence of dwarf individuals, whose body mass, total length, and tail length were 20%, 22%, and 70% smaller, respectively, than in the overall population. The dwarfs remain small in size after having fledged and are easily identified as adults. We discuss the importance of long-term studies to identify windows of opportunity for further research that will help in the conservation of endangered macaw species.
Source Guedes, N.M.R., Toledo, M.C.B., Fontoura, F.M. et al. Growth model analysis of wild hyacinth macaw (Anodorhynchus hyacinthinus) nestlings based on long-term monitoring in the Brazilian Pantanal. Sci Rep 12, 15382 (2022). https://doi.org/10.1038/s41598-022-19677-5
Author Neiva Maria Robaldo Guedes, Maria Cecília Barbosa Toledo, Fernanda Mussi Fontoura, Grace Ferreira da Silva & Reginaldo José Donatelli
Permission
(Reusing this file)
w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 4.0 International license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
Other versions
image extraction process
This file has been extracted from another file
: Growth model analysis of wild hyacinth macaw (Anodorhynchus hyacinthinus) nestlings based on long-term monitoring in the Brazilian Pantanal.pdf
original file

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

image/jpeg

573,137 byte

1,338 pixel

1,775 pixel

04f8a5731df96ae9146b401b518c76564bf575af

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current18:21, 1 April 2023Thumbnail for version as of 18:21, 1 April 20231,775 × 1,338 (560 KB)IxocactusFile:Growth model analysis of wild hyacinth macaw (Anodorhynchus hyacinthinus) nestlings based on long-term monitoring in the Brazilian Pantanal.pdf cropped 28 % horizontally, 59 % vertically using CropTool with precise mode.

The following page uses this file:

Global file usage

The following other wikis use this file: