California Fish and Wildlife Journal最新文献_第4页

Characterization of a developing recreational deep-drop fishery for swordfish off southern California 南加州附近一个正在发展的箭鱼休闲深水渔业的特征

IF 0.5 4区生物学

California Fish and Wildlife Journal Pub Date : 2022-07-01 DOI: 10.51492/cfwj.108.12

S. Aalbers, Michael Wang, L. Bellquist, Kate Kauer, Alexis Jackson, C. Sepulveda

{"title":"Characterization of a developing recreational deep-drop fishery for swordfish off southern California","authors":"S. Aalbers, Michael Wang, L. Bellquist, Kate Kauer, Alexis Jackson, C. Sepulveda","doi":"10.51492/cfwj.108.12","DOIUrl":"https://doi.org/10.51492/cfwj.108.12","url":null,"abstract":"California recreational anglers have recently started using specific deep-drop tackle to target swordfish (Xiphius gladius) below the thermocline during the daytime. Increased rod-and-reel fishing effort stems from promising experimental fishing trials of a recently approved commercial gear type off California (deep-set buoy gear), along with the widespread growth of deep-drop recreational fisheries for swordfish around the world. The rapid development and vast growth potential in this emerging recreational fishery, has outpaced the implementation of sampling programs to accurately quantify swordfish catch, effort, and economic output. We characterized recent sportfishing practices for swordfish and reviewed available California recreational fishery data sources. Findings suggest a sharp increase in estimated catch relative to previous decades and a major shift in the techniques used by local fishers to target swordfish beginning in September 2019. Recent increases in recreational swordfish catches aligned directly with heightened tackle sales for gear specific to deep-drop practices. Given the increased deep-set effort for swordfish within the region and the limited coverage of existing private-vessel catch documentation, additional monitoring efforts are needed to better gauge the potential social, economic, and ecological impacts of this emerging recreational fishery.","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45545844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Habitat use and reproductive success of ospreys in central interior California 加州中部内陆鱼鹰的栖息地利用和繁殖成功

IF 0.5 4区生物学

California Fish and Wildlife Journal Pub Date : 2022-07-01 DOI: 10.51492/cfwj.108.7

D. Airola, J. A. Estep

{"title":"Habitat use and reproductive success of ospreys in central interior California","authors":"D. Airola, J. A. Estep","doi":"10.51492/cfwj.108.7","DOIUrl":"https://doi.org/10.51492/cfwj.108.7","url":null,"abstract":"The osprey (Pandion halieatus) declined globally in the mid-late 20th century due primarily to pesticide contamination that reduced reproduction. The species has recovered through much of its range, and its range in California has increased. The species has received limited attention in recent decades, despite recommendations that it be monitored as an environmental indicator. In 2021, we located a sample of 39 osprey occupied nests near the Sacramento River and at reservoirs and small ponds in central interior California and determined habitats used and reproductive success. Nearly one-third of nests were located within 100 m of waterbodies and 88% were within 1000 m. The median distance of nests from roads was 51 m. Thirty-four (87%) of occupied nests were on anthropogenic sites, including utility poles, poles erected for ospreys, transmission towers, light poles, and port structures. Only five nests (13%) were in trees and snags. Nearly half (48%) of nests were on platforms constructed on utility poles and on poles erected for ospreys, both placed to protect electrical systems. Water levels in reservoirs, and some small farm ponds, were lower than average in 2021 due to drought, while the Sacramento River and Port were less affected. Twenty-four (71%) of 34 adequately monitored nests were successful in fledging at least one young. Productivity averaged 1.27 young/occupied nest, suggesting a healthy population. Reproductive success differed significantly among nests at different water body types, with river-port, reservoir, and pond sites exhibiting high, moderate, and low productivity, respectively. Our results document a range expansion into central interior California, presumably in response to reduced pesticide levels, reservoir creation, and availability of anthropogenic nest sites. Results also suggest that drought, and thus predicted warming and drier climate, may disproportionately affect populations nesting at non-riverine habitats by reducing the amount foraging area and increasing the distance from nest sites to foraging areas.","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47237886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The current distribution and putative spread of the channeled apple snail in California 加利福尼亚沟槽苹果蜗牛的当前分布和可能的传播

IF 0.5 4区生物学

California Fish and Wildlife Journal Pub Date : 2022-07-01 DOI: 10.51492/cfwj.108.8

J. Alvarez, Barbara J. Alvarez

引用次数: 0

Microhabitat Characteristics and Management of the Trinity Bristle Snail in the Greater Trinity Basin of Northern California 北加州大三位一体盆地三位一体刚毛蜗牛微生境特征及管理

IF 0.5 4区生物学

California Fish and Wildlife Journal Pub Date : 2022-05-16 DOI: 10.51492/cfwj.108.3

R. M. Sullivan

引用次数: 1

Population density and habitat selection in the San Pedro Mártir rainbow trout in mountain streams of northwestern Baja California, Mexico 墨西哥下加利福尼亚州西北部山区溪流中圣佩德罗·马尔蒂尔虹鳟的种群密度和栖息地选择

IF 0.5 4区生物学

California Fish and Wildlife Journal Pub Date : 2022-05-16 DOI: 10.51492/cfwj.108.4

G. Ruiz-Campos, Mariana Solís-Mendoza,, Faustino Camarena-Rosales, A. Andreu-Soler, E. P. Pister, Iván A Meza-Matty

{"title":"Population density and habitat selection in the San Pedro Mártir rainbow trout in mountain streams of northwestern Baja California, Mexico","authors":"G. Ruiz-Campos, Mariana Solís-Mendoza,, Faustino Camarena-Rosales, A. Andreu-Soler, E. P. Pister, Iván A Meza-Matty","doi":"10.51492/cfwj.108.4","DOIUrl":"https://doi.org/10.51492/cfwj.108.4","url":null,"abstract":"We assessed the population density and habitat selection of the southernmost rainbow trout subspecies, Oncorhynchus mykiss nelsoni, in three stream sites of the Sierra San Pedro Mártir, Baja California, Mexico. Habitat units (sections of the streams visually delimited on the basis of morphological and hydrological features) were sampled between February 2014 and April 2017, along a sample length of 2,980 m corresponding to 105 habitat units, which were classified into ten types. Mean population density (individuals/m2) was similar among the streams sampled (0.035–0.039/m2), as also over time for each stream, except for San Rafael Creek. Low gradient riffle was the habitat unit with the highest mean density of trout (0.151/m2). Of overall manner (dates and sites combined), population density was positively correlated to mean total length (TL), number of trout, and pH levels, and inversely correlated to total of dissolved solids. The total length of the trout was different among sample sites with the lowest and highest values in San Antonio de Murillo Creek and La Grulla Creek, respectively. Also, the total length of individuals among types of habitat units was different, with the highest values for MCP (mid-channel pool) and SRN (step run). Dates and sites pooled, the mean total length of individuals was positively correlated to population density, number of trout, habitat unit area, macrophyte cover, and inversely correlated to temperature. Low population densities (0.011–0.106/m2) combined with its small body size (38–216 mm TL) characterize this endemic trout in the southernmost part of species’ geographic range.","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47159764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Machine learning to understand patterns of burn severity from the SCU Lightning Complex Fires of August 2020 通过机器学习了解2020年8月SCU闪电复杂火灾的烧伤严重程度模式

IF 0.5 4区生物学

California Fish and Wildlife Journal Pub Date : 2022-05-16 DOI: 10.51492/cfwj.108.6

C. Potter, Olivia Alexander

引用次数: 3

Macrohabitat suitability model for the Trinity bristle snail in the Greater Trinity Basin of northern California 北加州大三一盆地三位一体刚毛蜗牛大生境适宜性模型

IF 0.5 4区生物学

California Fish and Wildlife Journal Pub Date : 2022-05-16 DOI: 10.51492/cfwj.108.2

R. M. Sullivan

{"title":"Macrohabitat suitability model for the Trinity bristle snail in the Greater Trinity Basin of northern California","authors":"R. M. Sullivan","doi":"10.51492/cfwj.108.2","DOIUrl":"https://doi.org/10.51492/cfwj.108.2","url":null,"abstract":"Analytical methods used to identify species-specific suitability of habitat include statistical habitat distribution models. Habitat type is the most reliable predictor of species occurrence in a particular area. Here, I developed a spatially explicit landscape-level suitability framework using metrics derived from forest, climatic, and topographic criteria for the Trinity bristle snail (Monadenia setosa). I conducted surveys to document locations of Trinity bristle snails and then performed spatial analysis of ecological variables in a geographic information systems (GIS) framework using point density estimators to produce a spatially explicit habitat suitability model; a geographic map reflecting the total area of hypothesized suitable macrohabitat within the known geographic range of the species; and a set of density surfaces showing where point features were concentrated that defined habitat suitability ranging from low to critical. This model provides resource managers with a distributional framework and overlay useful in anticipating where suitable macrohabitat for the species may be found across the landscape and serves as a foundation for updating and expanding population-level surveys and site-specific microhabitat assessments.","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47922093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Status and distribution of Arroyo Chub within its native range 阿罗约鱼在原生地的现状和分布

IF 0.5 4区生物学

California Fish and Wildlife Journal Pub Date : 2022-05-16 DOI: 10.51492/cfwj.108.5

J. O’Brien, Russell M Barabe

引用次数: 0

Testing a single-visit sampling approach for fecal DNA abundance estimation of tule elk in the Lake Pillsbury Basin 对白邦瑞湖盆地驼鹿粪便DNA丰度的单次采样方法进行了测试

IF 0.5 4区生物学

California Fish and Wildlife Journal Pub Date : 2022-05-16 DOI: 10.51492/cfwj.108.1

B. Sacks, Joshua P. Bush, Tom Batter

引用次数: 1

An innovative temporary escape ramp for deer and other wildlife 为鹿和其他野生动物提供了一个创新的临时逃生坡道

IF 0.5 4区生物学

California Fish and Wildlife Journal Pub Date : 2021-11-02 DOI: 10.51492/cfwj.hwisi.7

Gina E. Morimoto, Anae B. Otto, Laura Burkholder

{"title":"An innovative temporary escape ramp for deer and other wildlife","authors":"Gina E. Morimoto, Anae B. Otto, Laura Burkholder","doi":"10.51492/cfwj.hwisi.7","DOIUrl":"https://doi.org/10.51492/cfwj.hwisi.7","url":null,"abstract":"Concrete-lined water conveyance canals can be a significant source of mortality for ungulates and other wildlife, which can drown or become entrapped. Various types of wildlife escape structures have been deployed in canals with limited success. From 2011 to 2018, we used camera traps to monitor mule deer (Odocoileus hemionus) use of three different temporary wildlife escape structure designs with the goal of developing an effective escape structure for fawns. We monitored three to five locations at a hydroelectric water conveyance canal, operated by Pacific Gas and Electric Company in the foothills of Central California on the Sierra National Forest, in which trapped fawns had been detected previously during the maintenance period when the canal was dry. Mule deer activity and ramp use varied by year. During the monitoring period, deer were detected in the canal in all years except 2016 and 2017. Fawns and adults used the temporary escape structures to exit the canal in four of these years and 50% of mule deer detections showed ramp use overall. No deer were detected using the escape structures until jute netting and debris were added to the surface of the escape ramps in the third monitoring year. Prior to this modification, fawns were detected trapped in the canal investigating the ramps, but not using them to exit the canal. Deer may be more likely to utilize ramps covered with materials that mimic native ground cover. Seven other wildlife species were detected entering and exiting using the ramps with a general increase in use over years. Our temporary escape ramp design for small canals, when dry, appears to be novel and may be applicable in other areas. When compared to fencing or covering the canal, it is a relatively low-cost solution to reduce animal entrapment.","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45207830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0