Ovarian and oviductal morphology of a brood parasitic bird, Molothrus bonariensis (Passeriformes, Icteridae)

Pamela Rueda-Cediel, Gustavo Kattan, Martha Patricia Ramírez-Pinilla

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Brood parasitic birds such as cowbirds (Molothrus spp., Icteridae) lay their eggs in the nests of other species, abandoning them to be incubated and raised by the hosts. Lack of investment in parental care results in high annual fecundities of female parasitic birds. Brood parasites lay eggs in series or clutches, separated by gaps or non-laying intervals of a few days, but they may continuously lay for prolonged periods. In tropical latitudes, the fecundity of female shiny cowbirds (Molothrus bonariensis) has been estimated to be 120 eggs per year in a six-month breeding season, a fecundity that is paralleled only by domestic fowl. However, no detailed morphological descriptions of the reproductive tracts of brood parasites are available. We studied the reproductive tract of female shiny cowbirds in northeastern Colombia, searching for morphological features that might be related to this high fecundity. The reproductive tracts of female shiny cowbird showed no departures from the standard morphology or follicular dynamics known for birds with different postural patterns and fecundities, suggesting that high fecundity in cowbirds does not require a specialized reproductive tract. Instead, explanations must be sought at physiological levels.

Original languageEnglish (US)
Pages (from-to)261-276
Number of pages16
JournalActa Zoologica
Volume89
Issue number3
DOIs
StatePublished - Jul 1 2008

Fingerprint

Passeriformes
Icteridae
Molothrus bonariensis
Birds
Fertility
fecundity
bird
birds
Eggs
egg
parasite
Parasites
Molothrus
parasites
Colombia
parental care
Poultry
breeding season
Breeding
nest

Keywords

  • Clutch size
  • Fecundity
  • Laying pattern
  • Molothrus bonariensis
  • Ovary
  • Oviduct
  • Shiny cowbird

Cite this

Ovarian and oviductal morphology of a brood parasitic bird, Molothrus bonariensis (Passeriformes, Icteridae). / Rueda-Cediel, Pamela; Kattan, Gustavo; Ramírez-Pinilla, Martha Patricia.

In: Acta Zoologica, Vol. 89, No. 3, 01.07.2008, p. 261-276.

Research output: Contribution to journalArticle

Rueda-Cediel, Pamela ; Kattan, Gustavo ; Ramírez-Pinilla, Martha Patricia. / Ovarian and oviductal morphology of a brood parasitic bird, Molothrus bonariensis (Passeriformes, Icteridae). In: Acta Zoologica. 2008 ; Vol. 89, No. 3. pp. 261-276.
@article{4b6f71e9227141ac86c9e842aec51e44,
title = "Ovarian and oviductal morphology of a brood parasitic bird, Molothrus bonariensis (Passeriformes, Icteridae)",
abstract = "Brood parasitic birds such as cowbirds (Molothrus spp., Icteridae) lay their eggs in the nests of other species, abandoning them to be incubated and raised by the hosts. Lack of investment in parental care results in high annual fecundities of female parasitic birds. Brood parasites lay eggs in series or clutches, separated by gaps or non-laying intervals of a few days, but they may continuously lay for prolonged periods. In tropical latitudes, the fecundity of female shiny cowbirds (Molothrus bonariensis) has been estimated to be 120 eggs per year in a six-month breeding season, a fecundity that is paralleled only by domestic fowl. However, no detailed morphological descriptions of the reproductive tracts of brood parasites are available. We studied the reproductive tract of female shiny cowbirds in northeastern Colombia, searching for morphological features that might be related to this high fecundity. The reproductive tracts of female shiny cowbird showed no departures from the standard morphology or follicular dynamics known for birds with different postural patterns and fecundities, suggesting that high fecundity in cowbirds does not require a specialized reproductive tract. Instead, explanations must be sought at physiological levels.",
keywords = "Clutch size, Fecundity, Laying pattern, Molothrus bonariensis, Ovary, Oviduct, Shiny cowbird",
author = "Pamela Rueda-Cediel and Gustavo Kattan and Ram{\'i}rez-Pinilla, {Martha Patricia}",
year = "2008",
month = "7",
day = "1",
doi = "10.1111/j.1463-6395.2007.00315.x",
language = "English (US)",
volume = "89",
pages = "261--276",
journal = "Acta Zoologica",
issn = "0001-7272",
publisher = "Wiley-Blackwell",
number = "3",

}

TY - JOUR

T1 - Ovarian and oviductal morphology of a brood parasitic bird, Molothrus bonariensis (Passeriformes, Icteridae)

AU - Rueda-Cediel, Pamela

AU - Kattan, Gustavo

AU - Ramírez-Pinilla, Martha Patricia

PY - 2008/7/1

Y1 - 2008/7/1

N2 - Brood parasitic birds such as cowbirds (Molothrus spp., Icteridae) lay their eggs in the nests of other species, abandoning them to be incubated and raised by the hosts. Lack of investment in parental care results in high annual fecundities of female parasitic birds. Brood parasites lay eggs in series or clutches, separated by gaps or non-laying intervals of a few days, but they may continuously lay for prolonged periods. In tropical latitudes, the fecundity of female shiny cowbirds (Molothrus bonariensis) has been estimated to be 120 eggs per year in a six-month breeding season, a fecundity that is paralleled only by domestic fowl. However, no detailed morphological descriptions of the reproductive tracts of brood parasites are available. We studied the reproductive tract of female shiny cowbirds in northeastern Colombia, searching for morphological features that might be related to this high fecundity. The reproductive tracts of female shiny cowbird showed no departures from the standard morphology or follicular dynamics known for birds with different postural patterns and fecundities, suggesting that high fecundity in cowbirds does not require a specialized reproductive tract. Instead, explanations must be sought at physiological levels.

AB - Brood parasitic birds such as cowbirds (Molothrus spp., Icteridae) lay their eggs in the nests of other species, abandoning them to be incubated and raised by the hosts. Lack of investment in parental care results in high annual fecundities of female parasitic birds. Brood parasites lay eggs in series or clutches, separated by gaps or non-laying intervals of a few days, but they may continuously lay for prolonged periods. In tropical latitudes, the fecundity of female shiny cowbirds (Molothrus bonariensis) has been estimated to be 120 eggs per year in a six-month breeding season, a fecundity that is paralleled only by domestic fowl. However, no detailed morphological descriptions of the reproductive tracts of brood parasites are available. We studied the reproductive tract of female shiny cowbirds in northeastern Colombia, searching for morphological features that might be related to this high fecundity. The reproductive tracts of female shiny cowbird showed no departures from the standard morphology or follicular dynamics known for birds with different postural patterns and fecundities, suggesting that high fecundity in cowbirds does not require a specialized reproductive tract. Instead, explanations must be sought at physiological levels.

KW - Clutch size

KW - Fecundity

KW - Laying pattern

KW - Molothrus bonariensis

KW - Ovary

KW - Oviduct

KW - Shiny cowbird

UR - http://www.scopus.com/inward/record.url?scp=44949217617&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=44949217617&partnerID=8YFLogxK

U2 - 10.1111/j.1463-6395.2007.00315.x

DO - 10.1111/j.1463-6395.2007.00315.x

M3 - Article

VL - 89

SP - 261

EP - 276

JO - Acta Zoologica

JF - Acta Zoologica

SN - 0001-7272

IS - 3

ER -