Behavioral and morphological evidence of an Allen’s × Rufous hummingbird (Selasphorus sasin × S. rufus) hybrid zone in southern Oregon and northern California
Behavioral and morphological evidence of an Allen’s × Rufous hummingbird (Selasphorus sasin × S. rufus) hybrid zone in southern Oregon and northern California
复制标题
俄勒冈州南部和加利福尼亚州北部艾伦氏蜂鸟与红褐色蜂鸟（Selasphorus sasin — S. rufus）杂交区的行为和形态学证据
DOI：
10.1093/auk/ukz049
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Clark, Christopher J
中科院分区：
文献类型：
--
作者：
Myers, Brian M;Rankin, David T;Burns, Kevin J;Clark, Christopher J
艾伦氏（Selasphorus sasin）和棕褐色（S. rufus）蜂鸟一直被怀疑杂交，并可能形成一个混合区，其范围重叠在南俄勒冈州。迁徙的艾伦蜂鸟（S。S. sasin）在加州海岸至俄勒冈州边界的一条狭长地带沿着繁殖，而棕蜂鸟则在俄勒冈州南部至阿拉斯加繁殖。对183只雄性蜂鸟和138只雌性蜂鸟的行为和形态数据的分析表明，艾伦蜂鸟和棕蜂鸟在俄勒冈州南部和北方加州形成了一个杂交区。通过对20个雄性性状和9个雌性性状的线性判别函数分析和无性系分析，表明该南北杂种带的中心地带为从俄勒冈州的班登（Coos County）到俄勒冈州的奥福德港（Port Orford）（咖喱County）。接触区向北延伸到Rufous的繁殖范围（进入俄勒冈州莱恩县的佛罗伦萨），向南延伸到艾伦的繁殖范围（进入加州洪堡县的阿尔卡塔）。零星的内陆采样表明，混合区从海岸向内陆延伸了至少94公里。行为数据包括求偶显示，这是由离散的，模块化的，行为元素。性选择作用于这些求偶表现，因为与求偶行为相关的行为倾向比形态倾向更窄。一些求爱行为分析包括以前未描述的诊断行为特征的艾伦的和棕蜂鸟。
Allen’s (Selasphorus sasin) and Rufous (S. rufus) hummingbird have long been suspected to hybridize, and potentially form a hybrid zone where their ranges overlap in southern Oregon. Migratory Allen’s Hummingbird (S. s. sasin) breeds along a narrow strip of the California coast up to the Oregon border, while Rufous Hummingbird breeds from southern Oregon to Alaska. Analysis of behavioral and morphological data for 183 males and morphological data from 138 females showed that Allen’s and Rufous hummingbird form a hybrid zone in southern Oregon and northern California. Linear discriminant function analysis and cline analysis of 20 phenotypic characters for males and 9 phenotypic characters for females suggested the center of the coastal transect of this north–south hybrid zone spanned from Bandon, Oregon (Coos County), to Port Orford, Oregon (Curry County). The contact zone extended north into the breeding range of Rufous (into Florence, Lane County, Oregon) and south into the range of Allen’s (into Arcata, Humboldt County, California). Sporadic inland sampling suggested the hybrid zone extended at least 94 km inland from the coast. Behavioral data included courtship displays, which were composed of discrete, modular, behavioral elements. Sexual selection acted on these courtship displays, as behavioral clines related to courtship behaviors were more narrow than morphological clines. Some of the courtship behaviors analyzed included previously undescribed diagnostic behavioral characters for Allen’s and Rufous hummingbird.