The Canadian Field-Naturalist最新文献_第10页

Apparent wing-assisted incline running in a Common Grackle (Quiscalus quiscula) 普通石斑鱼的明显翼助倾斜奔跑

The Canadian Field-Naturalist Pub Date : 2022-07-29 DOI: 10.22621/cfn.v136i1.2861

Nicholas B Sakich

引用次数: 0

"Wolves: Western Warriors" by Julie Argyle, 2022 [book review] 《狼:西部勇士》(Wolves: Western Warriors)，朱莉·阿盖尔(Julie Argyle)， 2022年出版

The Canadian Field-Naturalist Pub Date : 2022-04-28 DOI: 10.22621/cfn.v135i4.2947

J. Way

引用次数: 0

The Canadian Field-Naturalist welcomes our new Book Review Editor 加拿大野外博物学家欢迎我们的新书评编辑

The Canadian Field-Naturalist Pub Date : 2022-04-28 DOI: 10.22621/cfn.v135i4.2973

D. Lepitzki

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Paedomorphic Blotched Tiger Salamander (Ambystoma mavortium melanostictum) in ovo counts, British Columbia, Canada 加拿大不列颠哥伦比亚省卵群中的紫胚斑虎蝾螈(Ambystoma mavortium melanotictum)

The Canadian Field-Naturalist Pub Date : 2022-04-28 DOI: 10.22621/cfn.v135i4.2116

S. Ashpole, Marissa Nati

{"title":"Paedomorphic Blotched Tiger Salamander (Ambystoma mavortium melanostictum) in ovo counts, British Columbia, Canada","authors":"S. Ashpole, Marissa Nati","doi":"10.22621/cfn.v135i4.2116","DOIUrl":"https://doi.org/10.22621/cfn.v135i4.2116","url":null,"abstract":"Reproductively mature larval morphs, known as paedogens, are a rare occurrence in Blotched Tiger Salamander (Ambystoma mavortium melanostictum). The Southern Mountain population of this subspecies, confined to the southern interior of British Columbia, is listed federally as Endangered and has been facing increasing pressures from anthropogenic stressors in both their aquatic and terrestrial landscapes. In 2017, we examined a subset of 36 frozen Blotched Tiger Salamander paedogens collected in September 1985 after rotenone treatment in preparation for a recreational fishery near Oliver, British Columbia. We estimated total in ovo numbers in nine gravid individuals to gain insight into paedogen reproductive condition. The number of eggs per individual averaged 227 ± 109 [SD]; range 28–421), with larger dark eggs accounting for 133 ± 69 and smaller pale eggs (possibly follicles or colour may be an artifact of storage) accounting for 94 ± 49. Salamanders were collected in September after the expected egg-laying period for the terrestrial form (early spring); thus, the reproductive stage of the eggs is unclear, but is assumed to be post-breeding and representative of developing eggs and follicles. Canadian data on in ovo counts within the body cavity have not been reported for Blotched Tiger Salamander paedogens and our study provides valuable information on the reproductive condition of paedogens. Although terrestrial forms have been observed, the presence of paedogens in the treated wetland has yet to be detected.","PeriodicalId":56136,"journal":{"name":"The Canadian Field-Naturalist","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74197345","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

Status and declining trend of Sparrow’s-egg Lady’s-slipper (Cypripedium passerinum) orchids in Pukaskwa National Park, Ontario, Canada 加拿大安大略省Pukaskwa国家公园雀蛋蛱蝶兰花的现状及下降趋势

The Canadian Field-Naturalist Pub Date : 2022-04-28 DOI: 10.22621/cfn.v135i4.2723

Courtney Irvine, L. Patterson

引用次数: 0

Another mention of Meadow Vole (Microtus pennsylvanicus) found in pellets of Snowy Owl (Bubo scandiacus) in northern Ungava Peninsula, Canada 在加拿大昂加瓦半岛北部的雪鸮(Bubo scandiacus)的颗粒中发现了另一个提到的草地田鼠(Microtus pennsylvanicus)

The Canadian Field-Naturalist Pub Date : 2022-04-28 DOI: 10.22621/cfn.v135i4.2719

L. Arbez, A. Royer, J. Therrien, S. Montuire

引用次数: 0

Assessing migration strategies and cause specific mortality of adult female White-tailed Deer (Odocoileus virginianus) in North Dakota, USA 美国北达科他州成年雌性白尾鹿(Odocoileus virginianus)迁徙策略及特定死亡原因评估

The Canadian Field-Naturalist Pub Date : 2022-04-28 DOI: 10.22621/cfn.v135i4.2104

Brian A. Schaffer, J. Jenks, W. Jensen, Eric S. Michel

{"title":"Assessing migration strategies and cause specific mortality of adult female White-tailed Deer (Odocoileus virginianus) in North Dakota, USA","authors":"Brian A. Schaffer, J. Jenks, W. Jensen, Eric S. Michel","doi":"10.22621/cfn.v135i4.2104","DOIUrl":"https://doi.org/10.22621/cfn.v135i4.2104","url":null,"abstract":"Life-history characteristics of White-tailed Deer (Odocoileus virginianus) have been documented in areas of the Northern Great Plains, but limited information is available in grassland dominated regions. We documented migration strategy, home range use, and survival of adult female White-tailed Deer in central North Dakota. We monitored 62 radio-collared adult (>1.5 year-old) female White-tailed Deer from February 2010 to December 2012. We documented 86 summer home ranges and classified deer as resident, migratory, or exhibiting a late season movement. Mean migration distance between non-overlapping summer and winter home ranges was 11.76 km (SE 0.86, n = 21). Mean late season movements were 20.69 km (SE 2.94, n = 7) and were likely the result of deer exhausting food resources throughout winter. We also developed five competing models that represented variation in survival among time periods (e.g., pre-hunt, hunt, and post-hunt in 2010 and 2011). Our top model indicated that survival (S) was similar between hunt 2010 and post-hunt 2011 periods but was lower (S = 0.82; SE 0.04, 95% CI 0.73–0.89) than the remaining time periods (S = 0.97; SE 0.01, 95% CI 0.93–0.99). Our results suggest that deer migration strategies and survival are likely influenced by a combination of winter severity and food availability. Mortalities attributed to hunter harvest were low during our study, which may indicate that increased recreational opportunities could be made available, even after severe winters.","PeriodicalId":56136,"journal":{"name":"The Canadian Field-Naturalist","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82625114","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

Gimme shelter: anthropogenic structures as resting sites for American Marten (Martes americana) 给我庇护:作为美洲貂休息场所的人为结构

The Canadian Field-Naturalist Pub Date : 2022-04-28 DOI: 10.22621/cfn.v135i4.2725

T. Jung, B. Slough

引用次数: 0

Diet and reproductive success of Great Horned Owl (Bubo virginianus) at its northern breeding limit 大角鸮(Bubo virginianus)北部繁殖极限的饮食和繁殖成功

The Canadian Field-Naturalist Pub Date : 2022-04-28 DOI: 10.22621/cfn.v135i4.2445

Madison Reynolds, J. Shook, G. Breed, K. Kielland

{"title":"Diet and reproductive success of Great Horned Owl (Bubo virginianus) at its northern breeding limit","authors":"Madison Reynolds, J. Shook, G. Breed, K. Kielland","doi":"10.22621/cfn.v135i4.2445","DOIUrl":"https://doi.org/10.22621/cfn.v135i4.2445","url":null,"abstract":"We studied the diet and reproductive success of Great Horned Owl (Bubo virginianus) at its northern range limit during an apparent high in the Snowshoe Hare (Lepus americanus) population. We performed diet analyses using images from fixed motion sensor cameras and pellet and prey remains collected at active nests, and gathered data on breeding success through camera and visual observations. Pellet data at 14 nests produced 1277 prey records consisting of 65–95% Snowshoe Hare biomass. Great Horned Owls ate 18 different prey types, with overall biomass consisting of 93% mammal, 7% bird, and less than 1% insects, frogs, and fish. The mean prey mass of 714 g (± 34 SE) was 2–25 times the mean prey mass of studies of this species at more southerly latitudes. Camera observations showed that Great Horned Owls delivered an average of 459 g/chick/d (± 75) throughout nesting. This was significantly (P = 0.005) higher than observations from Alberta, at 328–411 g/chick/d. Pellet/prey remains data showed that Great Horned Owls delivering a higher proportion of hares to their nestlings successfully raised more chicks (χ21 = 6.3, P = 0.012), highlighting the importance of this prey in the population dynamics of Great Horned Owl. In addition, we observed Snowshoe Hare removing pellets beneath nest sites, revealing an apparently undocumented bias to the use of pellet analysis.","PeriodicalId":56136,"journal":{"name":"The Canadian Field-Naturalist","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86052697","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

"We Are All Whalers: the Plight of Whales and our Responsibility" by Michael J. Moore, 2021 [book review] 《我们都是捕鲸者:鲸鱼的困境和我们的责任》，作者:迈克尔·j·摩尔，2021年出版[书评]

The Canadian Field-Naturalist Pub Date : 2022-04-28 DOI: 10.22621/cfn.v135i4.2975

W. Halliday

引用次数: 0