Flock structure and phenology of migration of the Common Linnet Linaria cannabina through eastern Spain

Q4 Agricultural and Biological Sciences

Ringing and Migration Pub Date : 2022-07-03 DOI:10.1080/03078698.2023.2242051

J. Arizaga, Salvador Escamilla, J. Castany, Ana María Barragán, Pasqual Timor, R. Silvestre, Alberto Rebollo, Jorge Adelantado, Benjamín Pupla, Ana Cantos

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Abstract

ABSTRACT The main goal of this study was to describe in detail the structure and phenology of flocks of the Common Linnet (Linaria cannabina) passing through eastern Spain. Data were compiled during the spring and autumn migrations of 2019 to 2021 (excluding spring 2020), by counting and by capture for ringing. We counted 6151 flocks, comprising 17 732 birds, of which 7638 individuals were captured. The size of flocks ranged from 1 to 30 Linnets (mean ± 95% CI, 2.8 ± 0.1), with a higher proportion of solitary migrants in spring (46.8%) than in autumn (33.8%). Passage in spring peaked during the third hour after dawn, whilst in autumn this peak was just after dawn. There were more females than males (56%), probably as an indicator of latitudinal differential migration. Juveniles were significantly more abundant (c. 80%) than adults. The phenological pattern of the passage was more variable in spring than in autumn, and such variation could be useful to explore potential impacts of climate change on the migration ecology of the species.

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大麻林奈在西班牙东部迁徙的群落结构和酚学

摘要本研究的主要目的是详细描述穿越西班牙东部的大麻林奈（Linaria cannabina）群落的结构和表型。数据是在2019年至2021年春季和秋季迁徙期间（不包括2020年春季）通过计数和振铃捕获收集的。我们统计了6151只鸟群，包括17332只鸟，其中7638只被捕获。羊群规模从1到30林奈不等（平均值±95%置信区间，2.8±0.1），春季单独迁徙的比例（46.8%）高于秋季（33.8%）。春季迁徙在黎明后的第三个小时达到高峰，而秋季则在黎明后达到高峰。女性多于男性（56%），这可能是纬度差异迁移的一个指标。青少年的数量明显多于成年人（约80%）。与秋季相比，春季的繁殖期的表型模式变化更大，这种变化可能有助于探索气候变化对物种迁徙生态的潜在影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ringing and Migration Agricultural and Biological Sciences-Animal Science and Zoology

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0.30

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