Seasonal phenology of the little brown bat (Myotis lucifugus) at 60°N

To investigate the impact of short summers and long summer solar periods at high latitudes on the behavior of a nocturnal, hibernating mammal, we recorded the phenology of Myotis lucifugus (little brown myotis) at 60oN in the Northwest Territories (NWT), Canada. In particular we assessed the timing of spring emergence from, and autumn entry into hibernation, reproduction, and seasonal mass fluctuations. We used a combination of acoustic monitoring and capture surveys at two hibernacula and two maternity roosts during 2011 and 2012. Myotis spp. were active at the hibernacula from late April to late September/early October, suggesting that the ‘active’ season length is similar to that of populations farther south. At maternity colonies, we detected M. lucifugus activity from early May to early October, with peaks during mid-July in both years. Lactation, fledging, and weaning all occurred later in the NWT than at more southern locations, and reproductive rates were significantly lower tha..., Capture data - We used mist nets (Avinet Inc. Dryden, New York), to capture bats adjacent to the two Myotis lucifugus maternity colonies (Thebacha and Lady Evelyn Falls), and various foraging sites around the South Slave region, during 2011 (35 nights; May - Sep) and 2012 (23 nights; Jun - Sep). At maternity colonies, we captured bats during emergence, before they had an opportunity to feed, and at all sites we held bats in a cloth bag for ≥ 0.5 h to allow defecation prior to weighing. A small number of bats were caught post-foraging; these records have been marked with an asterix in the 'massinacuracy' column of the dataset and were omitted from the mass-related analysis. We identified individuals to species, sex, age (adult or juvenile) and reproductive condition, weighed them with a portable balance, measured forearm with calipers, fitted them with a unique band (2.9 mm; Porzana Ltd., East Sussex, United Kingdom) for future identification, and released them at their point of capture...., , # **Data from: Seasonal phenology of the little brown bat (*Myotis lucifugus*) at 60°N**

Two simple comma separated (csv) files associated with the manuscript \"Seasonal phenology of the little brown bat (*Myotis lucifugus*) at 60°N\" by Jesika P. Reimer and Robert M. R. Barclay, accepted by Ecosphere.

## **Description of the data and file structure**

**Dataset 1: NWTMyotisCaptureRecords.xls**
Morphometric measurements and reproductive status for *Myotis lucifugus* and *Myotis septentrionalis* captured during summer surveys at maternity colonies, hibernacula, and foraging sites in the Northwest Territories, Canada during summer 2011 and 2012. These data were used to calculate maternity colony reproductive rates, the timing of parturition and juvenile fledging, and to assess changes in *Myotis lucifugus* mass throughout the season.

Empty cells and NA: cells were left empty when data were not available/not recorded.

Variables:
Night_date: the date the survey was started and includes c...

为探究高纬度地区短促夏季与漫长夏季日照时长对夜行性冬眠哺乳动物行为的影响，我们于加拿大西北地区（Northwest Territories，简称NWT）北纬60度处记录了小棕蝠（Myotis lucifugus，little brown myotis）的物候特征。本研究重点评估了其春季出眠、秋季入眠的时间、繁殖情况以及季节性体重波动。我们于2011年与2012年，在两处冬眠场所与两处繁殖栖息群结合声学监测与捕捉调查开展研究。

鼠耳蝠属（Myotis spp.）个体于4月末至9月末/10月初在冬眠场所活动，表明其"活跃季"时长与更靠南的种群相近。在繁殖栖息群中，我们于5月初至10月初检测到小棕蝠活动，两年均在7月中旬达到活动峰值。哺乳、幼蝠试飞与断乳均比南部种群发生得更晚，且繁殖率显著更低……

捕捉数据——我们使用雾网（Avinet Inc.，纽约德赖登市）在两处小棕蝠繁殖栖息群（Thebacha与Lady Evelyn Falls）以及南斯莱夫地区周边的多个觅食场所捕捉蝙蝠，调查时段为2011年（35个夜间，5月至9月）与2012年（23个夜间，6月至9月）。在繁殖栖息群中，我们于蝙蝠进食前的出飞时段进行捕捉；在所有采样点，我们将蝙蝠置于布袋中至少0.5小时以使其排便后再称重。少数蝙蝠为觅食后捕捉所得，此类记录在数据集的"massinacuracy"列中以星号标记，并被排除在体重相关分析之外。我们对个体进行物种、性别、年龄（成体或幼体）以及繁殖状态鉴定，使用便携式天平称重，用游标卡尺测量前臂长度，为个体佩戴唯一标识环（尺寸2.9mm；Porzana Ltd.，英国东萨塞克斯郡）以便后续识别，随后在捕捉原地放归个体。

# **数据来源：北纬60度处小棕蝠（Myotis lucifugus）的季节性物候**

两篇简易逗号分隔值（CSV）文件，关联于已被《Ecosphere》收录的论文《北纬60度处小棕蝠（Myotis lucifugus）的季节性物候》，作者为Jesika P. Reimer与Robert M. R. Barclay。

## **数据与文件结构说明**

**数据集1：NWTMyotisCaptureRecords.xls**
包含2011年与2012年夏季，于加拿大西北地区繁殖栖息群、冬眠场所及觅食场所开展的夏季调查中捕获的小棕蝠与北方鼠耳蝠（Myotis septentrionalis）的形态测量数据与繁殖状态信息。本数据集数据用于计算繁殖栖息群的繁殖率、产仔时间与幼蝠试飞离巢时间，并评估小棕蝠整个活动季的体重变化情况。

空值与NA：当数据不可得或未记录时，单元格留空。

变量：
Night_date：调查开始日期，包含……