@article{76682165ea2d436aafb76a50cbb484d2,
title = "Extra-pair paternity correlates with genetic diversity, but not breeding density, in a Neotropical passerine, the black catbird",
abstract = "The frequency of extra-pair paternity (EPP) varies widely across socially monogamous birds, but the proximate mechanisms driving this variation remain unclear. In this study, we tested two major factors hypothesized to influence extra-pair mating – breeding density and genetic diversity – by comparing genetic mating patterns in two populations of black catbirds Melanoptila glabrirostris. This Neotropical songbird is endemic to the Yucat{\'a}n Peninsula, including eastern Mexico, and its offshore islands. We sampled one mainland (Sian Ka'an Biosphere Reserve) and one island (Isla Cozumel) population and used single-nucleotide polymorphisms (SNPs) to quantify heterozygosity and genetic parentage over two breeding seasons. Moderate levels of EPP occurred in both populations (9.5–35% of offspring and 17–45% of nests). Contrary to predictions, breeding density did not affect EPP: although breeding densities were much higher on the mainland than on the island, EPP rates did not differ between populations, and local breeding density was not correlated with EPP at individual nests. In contrast, partial support emerged for the hypothesis that genetic diversity influences EPP: extra-pair offspring were more heterozygous than within-pair offspring. However, the two populations did not differ in genetic diversity, and neither the heterozygosity of social fathers nor within-pair relatedness predicted EPP. These results are consistent with recent comparative studies suggesting that breeding density is not a critical driver of EPP rates, and that not all tropical songbirds exhibit low rates of EPP.",
keywords = "Cozumel, Yucat{\'a}n Peninsula, extra-pair mating, mating strategies, multiple mating, temperate zone bias",
author = "LaPergola, {Joshua B.} and Christina Riehl and Mart{\'i}nez-G{\'o}mez, {Juan E.} and Blanca Rold{\'a}n-Clar{\`a} and Curry, {Robert L.}",
note = "Funding Information: – Villanova Univ. and a Florida Ornithological Society William B. and Mary J. Robertson Fellowship awarded to JBL provided funding. JBL was also supported by a grant from the National Science Foundation (grant no. 1755279 award to CR). JEM‐G was a postdoctoral fellow at the Inst. de Ecolog{\'i}a, A.C. while we conducted this research. Funding Information: – We gratefully acknowledge Jes{\'u}s Gustavo Marina Hipolito, Ligia Torres Ab{\'a}n, Jan F. Gogarten, Ad{\'e}le Michon and other volunteers for assistance with data collection; Felipe Ju{\'a}rez, Rafael Chac{\'o}n, Omar Ort{\'i}z and CONANP, the Fundaci{\'o}n de Parques y Museos de Cozumel, Fundaci{\'o}n Plan Estrat{\'e}gico de Cozumel, Direcci{\'o}n de Ecolog{\'i}a Municipal, Island Endemics Foundation, Amigos de Sian Ka'an A. C., Global Vision International and Boca Paila Fishing Lodge for generous logistical support; and the subject editor, two anonymous reviewers, Daniel R. Ardia, Vikram K. Iyengar and Walter D. Koenig, for their valuable comments on earlier versions of the manuscript and constructive input at various stages of the project. We also thank members of Cornell's Dept. of Neurobiology and Behavior Lunch Bunch and Princeton's Integrated Behavioral Research Group for helpful feedback and suggestions. We also thank Dhriti Tandon for splitting the MiSeq library with us. Finally, we thank Wei Wang and the staff of the Princeton Univ. Genomics Core Facility for assistance with library preparation and sequencing. – Villanova Univ. and a Florida Ornithological Society William B. and Mary J. Robertson Fellowship awarded to JBL provided funding. JBL was also supported by a grant from the National Science Foundation (grant no. 1755279 award to CR). JEM-G was a postdoctoral fellow at the Inst. de Ecolog{\'i}a, A.C. while we conducted this research. Publisher Copyright: {\textcopyright} 2022 The Authors. Journal of Avian Biology published by John Wiley & Sons Ltd on behalf of Nordic Society Oikos.",
year = "2022",
month = nov,
day = "1",
doi = "10.1111/jav.03034",
language = "English (US)",
volume = "2022",
journal = "Journal of Avian Biology",
issn = "0908-8857",
publisher = "Wiley-Blackwell",
number = "11-12",
}