California Fish and Wildlife Journal最新文献

{"title":"The value of long-term monitoring of the San Francisco Estuary for Delta Smelt and Longfin Smelt","authors":"Trishelle Tempel, Timothy D. Malinich, Jillian M. Burns, Arthur Barros, Christina E. Burdi, J. Hobbs","doi":"10.51492/CFWJ.CESASI.7","DOIUrl":"https://doi.org/10.51492/CFWJ.CESASI.7","url":null,"abstract":"","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48132890","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}

{"title":"New detections extend the known range of the state-threatened Sierra Nevada red fox","authors":"Brian E. Hatfield, Julia M Runcie, Elizabeth A. Siemion, Cate B. Quinn, T. Stephenson","doi":"10.51492/CFWJ.CESASI.26","DOIUrl":"https://doi.org/10.51492/CFWJ.CESASI.26","url":null,"abstract":"","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48333113","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}

{"title":"Assessing the distribution and abundance of larval Longfin Smelt: What can a larval monitoring program tell us about the distribution of a rare species?","authors":"Michael Eakin","doi":"10.51492/cfwj.cesasi.9","DOIUrl":"https://doi.org/10.51492/cfwj.cesasi.9","url":null,"abstract":"Following its listing as threatened under the California Endangered Species Act in 2009, Longfin Smelt (Spirinchus thaleichthys) became a focus of resource managers in the San Francisco Estuary. Water exports were identified as one of the factors affecting Longfin Smelt abundance, and managers were challenged with balancing freshwater flows through the Sacramento-San Joaquin River Delta between human and ecosystem needs. This balance becomes especially challenging during the winter and spring when Longfin Smelt are spawning. Resource managers identified that the impact associated with entrainment of larval Longfin Smelt in the winter was uncertain, and to understand and manage this risk, new data was needed. In 2009 the Smelt Larva Survey was implemented and has since sampled newly hatched larvae from January–March. Here, I analyze this data and ask specific questions regarding distribution and densities of the larvae throughout five regions of the Upper Estuary – Napa River, Suisun, Confluence, Northern Delta, and Southern Delta – with the goal of understanding the spatial and temporal patterns of larval distribution since 2009. I found that larvae were most prevalent in the Suisun, Confluence, and Northern Delta regions, and less common in the Southern Delta and Napa River regions. Larval Longfin Smelt densities changed following a recent drought and record low population abundances. Median per-station averaged densities ranged from 154 to 274 fish per 1,000 m3 between 2009 and 2013 but declined to 1 to 65 fish per 1,000 m3 from 2014 to 2019. This survey data demonstrates that Longfin Smelt reproductive output has declined since their listing in 2009 and that their distribution into the Southern Delta is low relative to the rest of the Upper Estuary. These results reaffirm the species’ continued decline since its listing, and that improving the abundance of spawning adults is one of the many important steps needed for long-term recovery and resilience.","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43777476","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}

{"title":"Green Sturgeon (Acipenser medirostris) in the San Joaquin River, California: new record","authors":"Shaun T. Root, Z. Sutphin, Towns Burgess","doi":"10.51492/cfwj.106.22","DOIUrl":"https://doi.org/10.51492/cfwj.106.22","url":null,"abstract":"","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2020-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46481022","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}

{"title":"Time series modeling and forecasting of a highly regulated riverine system: implications for fisheries management","authors":"R. M. Sullivan, J. Hileman","doi":"10.51492/cfwj.106.20","DOIUrl":"https://doi.org/10.51492/cfwj.106.20","url":null,"abstract":"","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2020-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44813767","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}

{"title":"Validated age and growth of Barred Sand Bass within the Southern California Bight","authors":"Kimberly M. Walker, Kimberly M. Pentilla, Erica T. JARVIS-MASON, C. F. Valle","doi":"10.51492/cfwj.106.19","DOIUrl":"https://doi.org/10.51492/cfwj.106.19","url":null,"abstract":"The recreational fishery for Barred Sand Bass (Paralabrax nebulifer) has recently shown declines in catch prompting a need for updating life-history attributes. The objective of this study was to provide a more extensive and current examination of Barred Sand Bass age and growth. Fish were collected from the southern California bight from 2011 to 2015. Using Akaike Information Criteria analysis we determined that the three-parameter von Bertalanffy growth model was the best fit out of the four tested models (Gompertz, Logistic, Power, and von Bertalanffy). Males grew slightly quicker than females (k, males = 0.10, females = 0.08). Males and females did not differ in length, weight, or the length-weight relationship. We also validated yearly banding of Barred Sand Bass with oxytetracycline marking of two fish in captivity for one year. Location of the first annulus was also validated with otolith diameter measurements. Finally, we compared the current study to a past 1990’s study and observed different growth parameters. The growth difference after thirty years showed that possible fishing pressure and environmental factors might have influenced changes in growth. This study provides current information on age, growth over time and, otolith morphometrics, for Barred Sand Bass.","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2020-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41619897","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}

{"title":"Ecology of Northwestern Pond Turtles in a Sierran Foothill Population, California","authors":"D. Germano","doi":"10.51492/cfwj.106.21","DOIUrl":"https://doi.org/10.51492/cfwj.106.21","url":null,"abstract":"","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2020-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49062516","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}

{"title":"Post-wildfire response of Shasta snow-wreath","authors":"Len Lindstrand, III,, Julie A. Kierstead, D. Taylor","doi":"10.51492/cfwj.firesi.6","DOIUrl":"https://doi.org/10.51492/cfwj.firesi.6","url":null,"abstract":"","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42868830","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}

{"title":"Analysis of the impacts of the Soberanes Wildfire on stream ecosystems","authors":"Jessie M. Doyle, M. Bogdan, J. Olson","doi":"10.51492/cfwj.firesi.9","DOIUrl":"https://doi.org/10.51492/cfwj.firesi.9","url":null,"abstract":"Wildfires within the western United States are expected to increase in frequency and magnitude but our understanding of how they impact coastal streams is limited. The 2016 Soberanes Wildfire provided an opportunity to determine which biotic and abiotic factors were most impacted by the fire occurring on the California Central Coast. Water quality, benthic macroinvertebrate samples and habitat measurements were taken both before and after the fire. We observed an increase in the levels of phosphorus 4 months and 8 months post-fire which may have contributed to observed increases in microalgae growth. There was a complete loss of shredders in the benthic macroinvertebrate community which could be caused by the loss of vegetation in stream-adjacent riparian areas. These post-fire results were expected based on previous research, however organic material inputs to the stream unexpectedly did not change between preand post-fire conditions, which may be due to a delayed increase in inputs from riparian vegetation which short-term monitoring is unable to capture. A long-term monitoring program effort is critical for understanding the recovery of these coastal watersheds from fire.","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47569121","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}

{"title":"The California Vegetation Treatment Program: integrating biological resource protection into wildfire risk reduction","authors":"Allison R. Fuller, Lara J. Rachowicz, Heather Blair","doi":"10.51492/cfwj.firesi.2","DOIUrl":"https://doi.org/10.51492/cfwj.firesi.2","url":null,"abstract":"California’s wildfire crisis is continuing and could worsen with climate change. As noted in a report of California Governor Newsom’s Wildfire Strike Force (2019): “Climate change has created a new wildfire reality for California. The state’s fire season is now almost year-round. More than 25 million acres of California wildlands are classified as under very high or extreme fire threat. Approximately 25 percent of the state’s population—11 million people—lives in that high-risk area.” Since 2010, the number of wildfires occurring annually has increased, as has the total land area burned. The largest, most destructive, and deadliest wildfires on record in California history were wind-driven wildfires that occurred in 20181 (CAL FIRE 2019a, CAL FIRE 2019b, CAL FIRE 2019c). In addition, thousands of fires occur in the state every year that do not reach catastrophic levels. The state’s response to this crisis includes a comprehensive array of risk reduction and management strategies, such as vegetation treatments, home hardening, expanded evacuation capacity, comprehensive emergency planning, and improved land use practices, as well as investment in new suppression and response equipment and resources, use of technology tools, and establishment of strong utility oversight. In May of 2018, California Governor Brown signed Executive Order B-52-18, which bolstered one of these strategies by substantially increasing the pace and scale of vegetation treatments allowed in the state. Under the order, up to approximately 2,000 km2 on nonfederal lands are targeted for treatment each year. This expanded target is a substantial increase compared to the current level of vegetation treatment activity in California. Legislation was subsequently passed in 2018 to expand on this Executive Order, including Senate Bill (SB) 1260, which required a streamlined process under the California Environmental Quality Act (CEQA) to help expedite implementation of vegetation treatments to address wildfire risk. On 30 December 2019, the California Board of Forestry and Fire Protection (Board) fulfilled the SB 1260 requirement for streamlined CEQA coverage by approving the Cali-","PeriodicalId":29697,"journal":{"name":"California Fish and Wildlife Journal","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42371135","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}