Northwestern Naturalist最新文献_第5页

THE MURMURATIONS OF EUROPEAN STARLINGS; AN ANTI-PREDATOR STRATEGY AND A HISTORICAL MISNOMER 欧洲椋鸟的啁啾;反掠食者战略和历史用词不当

Northwestern Naturalist Pub Date : 2022-08-01 DOI: 10.1898/NWN21-09

D. Dekker

引用次数: 0

IS THIS PHILOPATRY OR DISPERSAL IN FEMALE BOREAL OWLS? 这是雌性北方猫头鹰的哲学还是分散?

Northwestern Naturalist Pub Date : 2022-08-01 DOI: 10.1898/NWN20-35

D. Holt, Matthew D. Larson, S. Hiro, M. Seidensticker

{"title":"IS THIS PHILOPATRY OR DISPERSAL IN FEMALE BOREAL OWLS?","authors":"D. Holt, Matthew D. Larson, S. Hiro, M. Seidensticker","doi":"10.1898/NWN20-35","DOIUrl":"https://doi.org/10.1898/NWN20-35","url":null,"abstract":"Abstract Four cases of female Boreal Owls (Aegolius funereus) recaptured within varying distances of their natal or breeding sites are reported. We considered 3 recaptures within the natal or breeding neighborhood to be philopatry (site fidelity), and 1 case as dispersal. One banded female was recaptured as a 2y old, 3.4 km from her natal box. We considered this philopatry. She was later recaptured 15.8 km from her 2nd breeding site, and we considered this breeding dispersal. She lived at least 5 y, but we did not know her whereabouts in all years. A 2nd female banded as a nestling was recaptured 2.0 km from her natal box, breeding as a yearling (11 mo). We considered this natal philopatry. A 3rd female, previously banded as a breeding adult, was recaptured 2 y later breeding 2.5 km from her initial site of banding. We considered this philopatry. She was at least 4 y old. The 4th female was recaptured 3.6 km from her initial breeding box. We considered this philopatry. She was recaptured again the following year in the same nest box as her 2nd nest site. We considered the use of this same nest site philopatry. She was in her 5th calendar year. Our records are perhaps the 1st reports of natal philopatry and age of 1st breeding for female Boreal Owls in North America, and contribute additional records of female site fidelity and dispersal.","PeriodicalId":142406,"journal":{"name":"Northwestern Naturalist","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132639629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ABSTRACTS FROM THE 2022 WESTERN PARC EXTRAVAGANZA, VIRTUAL ANNUAL MEETING OF SW PARC AND NW PARC (PARTNERS IN AMPHIBIAN AND REPTILE CONSERVATION), HOSTED BY THE TURTLE SURVIVAL ALLIANCE (TSA), 7–9 APRIL 2022 2022年4月7日至9日，由海龟生存联盟(tsa)主办的sw PARC和nw PARC(两栖动物和爬行动物保护的合作伙伴)虚拟年会

Northwestern Naturalist Pub Date : 2022-08-01 DOI: 10.1898/NWN103-2

Contributed Talks

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GROWTH AND REPRODUCTION OF NORTHWESTERN POND TURTLES IN THE MID-WILLAMETTE VALLEY, OREGON 俄勒冈州威拉米特河谷中部西北塘龟的生长和繁殖

Northwestern Naturalist Pub Date : 2022-08-01 DOI: 10.1898/NWN20-21

D. Germano, R. Bury, G. Bury

{"title":"GROWTH AND REPRODUCTION OF NORTHWESTERN POND TURTLES IN THE MID-WILLAMETTE VALLEY, OREGON","authors":"D. Germano, R. Bury, G. Bury","doi":"10.1898/NWN20-21","DOIUrl":"https://doi.org/10.1898/NWN20-21","url":null,"abstract":"Abstract The Northwestern Pond Turtle (Actinemys marmorata) ranges from Washington to the southern end of the Central Valley of California. Because of the extensive latitudinal range of the species, it is expected that several life-history traits will vary across the range. Most data on population structure and growth of A. marmorata have been gathered from southern Oregon and California, and reproductive data are sparse north of the southern end of the range. These data are important to a critical understanding of the species' biology and especially for making conservation judgments for a species some consider in need of protection. Thus, we collected key life-history information at the Luckiamute State Natural Area in the mid-Willamette Valley, Oregon. We found that the population structure, adult size, and growth were similar to southern Oregon sites. Clutch size from radiographs was 6.0 ± 1.18 SE (range = 5–8), smaller than sites at the southern end of the range. The slow growth rate of Luckiamute turtles may be explained by cooler temperature in the Willamette Valley compared to more southerly sites. Still, Luckiamute adults reach a slightly larger size than most turtles in more southerly sites. It just requires many more years to reach sexual maturity and achieve larger sizes in northern areas.","PeriodicalId":142406,"journal":{"name":"Northwestern Naturalist","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124840998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

COAT COLOR OF WESTERN LONG-EARED BATS (MYOTIS EVOTIS) LIVING IN DIFFERENT ENVIRONMENTS: A TEST OF GLOGER'S RULE 生活在不同环境中的西部长耳蝙蝠(myotis evotis)的毛色:对gloger法则的检验

Northwestern Naturalist Pub Date : 2022-08-01 DOI: 10.1898/NWN21-14

D. Solick, R. Barclay

引用次数: 0

PREDATION OF A PACIFIC TREE FROG (PSEUDACRIS REGILLA) BY AN AMERICAN ROBIN (TURDUS MIGRATORIUS) ON SAN JUAN ISLAND, WASHINGTON 华盛顿圣胡安岛上一只太平洋树蛙被美洲知更鸟(turdus migratorius)捕食

Northwestern Naturalist Pub Date : 2022-08-01 DOI: 10.1898/NWN21-20

Thor R. Hanson

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LARGE WHALE OCCURRENCE IN NORTHEASTERN CHUKCHI AND SOUTHERN BEAUFORT SEAS FROM VESSEL SURVEYS, 2008–2014 2008-2014年楚科奇海东北部和波弗特海南部大型鲸鱼的船只调查

Northwestern Naturalist Pub Date : 2022-08-01 DOI: 10.1898/NWN21-11

K. Lomac-MacNair, Sheyna S. Wisdom, José Pedro de Andrade, J. Stepanuk, Maren Anderson, Ann Zoidis, E. Esteves

{"title":"LARGE WHALE OCCURRENCE IN NORTHEASTERN CHUKCHI AND SOUTHERN BEAUFORT SEAS FROM VESSEL SURVEYS, 2008–2014","authors":"K. Lomac-MacNair, Sheyna S. Wisdom, José Pedro de Andrade, J. Stepanuk, Maren Anderson, Ann Zoidis, E. Esteves","doi":"10.1898/NWN21-11","DOIUrl":"https://doi.org/10.1898/NWN21-11","url":null,"abstract":"Abstract With global climate change and increasing ocean-based human activities, large whales face novel challenges in the Arctic seas. Understanding and assessing large whale occurrence and the links between occurrence and environmental variables in this region is a key issue in current management and conservation strategies for Arctic marine mammal species. During the Chukchi Sea Environmental Studies Program, large whale occurrence data were collected from vessel surveys during >56,909 km of observation effort in summer and autumn, 2008 to 2014, in the northeastern Chukchi, southern Beaufort, and Bering Seas. The most-recorded species were the Bowhead (Balaena mysticetus) and Gray (Eschrichtius robustus) Whales. Subarctic species recorded included the Humpback Whale (Megaptera novaeangliae), Fin Whale (Balaenoptera physalus), and Minke Whale (Balaenoptera acutorostrata). Sightings data were analyzed with respect to environmental variables: sea-surface temperature (SST), depth (m), and distance from shore (km), by month and year. Investigating occurrence associations with environmental parameters is a key element for predicting large whale trends in these Arctic seas and for understanding marine mammals as sentinels of oceanic shifts.","PeriodicalId":142406,"journal":{"name":"Northwestern Naturalist","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115785242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

RURAL TURTLES: ESTIMATING THE OCCUPANCY OF NORTHWESTERN POND TURTLES AND NON-NATIVE RED-EARED SLIDERS IN AGRICULTURAL HABITATS IN CALIFORNIA'S SACRAMENTO VALLEY AND SACRAMENTO-SAN JOAQUIN RIVER DELTA 农村龟:估计西北塘龟和非本地红耳龟在加州萨克拉门托山谷和萨克拉门托-圣华金河三角洲农业栖息地的占用

Northwestern Naturalist Pub Date : 2022-08-01 DOI: 10.1898/NWN20-22

Alexandria M. Fulton, Jonathan P. Rose, B. Halstead

{"title":"RURAL TURTLES: ESTIMATING THE OCCUPANCY OF NORTHWESTERN POND TURTLES AND NON-NATIVE RED-EARED SLIDERS IN AGRICULTURAL HABITATS IN CALIFORNIA'S SACRAMENTO VALLEY AND SACRAMENTO-SAN JOAQUIN RIVER DELTA","authors":"Alexandria M. Fulton, Jonathan P. Rose, B. Halstead","doi":"10.1898/NWN20-22","DOIUrl":"https://doi.org/10.1898/NWN20-22","url":null,"abstract":"Abstract The Northwestern Pond Turtle (Actinemys marmorata; WPT) was once widespread throughout the Sacramento Valley and the Sacramento-San Joaquin River Delta. Much of its historical range has been converted into agricultural land, reducing and altering aquatic habitat and surrounding uplands. Red-eared Sliders (Trachemys scripta elegans; RES) have been introduced throughout much of the existing WPT range, particularly near urban centers, potentially competing with WPT for resources. Previous surveys for turtles in central California have primarily focused on rivers, lakes, and protected wetlands. Little is known about where WPT and RES occur in the vast expanses of agricultural land across the Sacramento Valley and Sacramento-San Joaquin River Delta. Using aquatic hoop nets, we surveyed 142 locations (102 irrigation canal sites, 39 wetlands, 1 tidally influenced slough) across 8 counties during the summers of 2018 and 2019. Both species were detected in agricultural habitats. Using occupancy modeling, we estimated that WPT occur at 44 (95% CRI = 38–53) of our trapping sites and RES occur at 51 (41–66) sampled sites. Co-occurrence of these 2 species was rare; the species were found together at only 6 sites. RES were primarily found in restored wetlands near major roads and the Sacramento metropolitan area, whereas WPT were more commonly found farther from urban areas in wider canals. Our work provides a picture of how WPT and RES occupy this modified agroecosystem that can inform future conservation efforts.","PeriodicalId":142406,"journal":{"name":"Northwestern Naturalist","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122218143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

NEW RECORDS ABOUT THE DIVERSITY, DISTRIBUTION, AND SEASONAL ACTIVITY PATTERNS BY BATS IN YUKON AND NORTHWESTERN BRITISH COLUMBIA 关于育空地区和不列颠哥伦比亚省西北部蝙蝠的多样性、分布和季节性活动模式的新记录

Northwestern Naturalist Pub Date : 2022-08-01 DOI: 10.1898/NWN21-10

B. Slough, C. Lausen, B. Paterson, I. J. Hansen, Julie P. Thomas, Piia M. Kukka, T. Jung, Jason Rae, Debbie van de Wetering

{"title":"NEW RECORDS ABOUT THE DIVERSITY, DISTRIBUTION, AND SEASONAL ACTIVITY PATTERNS BY BATS IN YUKON AND NORTHWESTERN BRITISH COLUMBIA","authors":"B. Slough, C. Lausen, B. Paterson, I. J. Hansen, Julie P. Thomas, Piia M. Kukka, T. Jung, Jason Rae, Debbie van de Wetering","doi":"10.1898/NWN21-10","DOIUrl":"https://doi.org/10.1898/NWN21-10","url":null,"abstract":"Abstract The bat fauna of northwestern Canada remains poorly known, principally owing to a lack of dedicated surveys across this vast region. To better assess the diversity of bats in the region, we compiled records from several acoustic survey projects and capture sessions whose purpose was to inventory bats in Yukon and northwestern British Columbia (BC) from 2013 to 2018. During our surveys we obtained the 1st apparent acoustic records for Yuma Myotis (Myotis yumanensis), Californian Myotis (M. californicus), Long-eared Myotis (M. evotis), Silver-haired Bat (Lasionycteris noctivagans) and Eastern Red Bat (Lasiurus borealis) from this region. We also captured 2 Long-eared Myotis in northwestern BC. Additionally, our surveys provided range extensions of Northern Myotis (M. septentrionalis), Long-legged Myotis (M. volans), and Hoary Bat (Lasiurus cinereus). Finally, by deploying bat detectors in late autumn, and in some cases throughout the winter, we provide data about seasonal patterns for bat activity in some locations, revealing that bats in northwestern BC may be active as late as 29 October and emerge as early as 30 March, a pattern similar to that observed in southern BC. By combining data from several disparate surveys, conducted for different reasons by different researchers, we were able to provide a fuller picture of the bat fauna of this vast region. Our data provides further evidence that the bat fauna of northwestern Canada is richer than previously documented.","PeriodicalId":142406,"journal":{"name":"Northwestern Naturalist","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131633986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MOUNTAIN GOAT (OREAMNOS AMERICANUS) POPULATION RECOVERY AT POST-ERUPTION MOUNT ST. HELENS (LAWETLAT'ɬ A), WASHINGTON 华盛顿圣海伦斯火山爆发后山山羊(美洲山羊)种群的恢复

Northwestern Naturalist Pub Date : 2022-03-11 DOI: 10.1898/1051-1733-103.1.1

N. D. Reynolds, E. Holman, S. Bergh, Nicholle R Stephens, Erik R White, Stuart J Freitas, James M. Wainwright

{"title":"MOUNTAIN GOAT (OREAMNOS AMERICANUS) POPULATION RECOVERY AT POST-ERUPTION MOUNT ST. HELENS (LAWETLAT'ɬ A), WASHINGTON","authors":"N. D. Reynolds, E. Holman, S. Bergh, Nicholle R Stephens, Erik R White, Stuart J Freitas, James M. Wainwright","doi":"10.1898/1051-1733-103.1.1","DOIUrl":"https://doi.org/10.1898/1051-1733-103.1.1","url":null,"abstract":"Abstract The powerful volcanic eruption of Mount St. Helens in 1980 is commonly reported to have killed large numbers of wildlife species, including near-extirpation of the local Mountain Goat (Oreamnos americanus) population. In the decade after 2000 we increasingly received reports of goat sightings around Mount St. Helens, including nannies with kids in 2007. By 2011, we estimated 15 to 25 goats were present on the landscape. In 2014, we initiated 2 lines of research. The first was a review of historic records to document pre-eruption goat populations. The second was the establishment of an annual minimum population-size survey using simple ground-count methods. In 2015, we revised our methods, and our results between 2015 and 2020 show a general growth trend of minimum population size from 152 goats in 2015 to 200 in 2020, with a peak of 240 goats observed in 2019. In 2017 and 2020, we paired ground counts with aerial surveys (with sighting correction) to better estimate population size, and observed 246 goats (245.9, 90% CI = 232.3–260.4) in 2017 and 252 (251.7, 90% CI = 233.2–270.1) in 2020. Our 2020 aerial estimate of ∼252 goats is a population 5 times (and possibly 10 times) the size of the 20–50 Mountain Goats we speculate were present in the same landscape prior to the 1980 eruption landscape, and reveals a substantial local recovery of the species.","PeriodicalId":142406,"journal":{"name":"Northwestern Naturalist","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116664735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0