Bulletin (Southern California Academy of Sciences)最新文献

{"title":"Site Fidelity of a Coastal Cactus Wren (Camphylorynchus brunneicapillus) on the Palos Verdes Peninsula","authors":"A. Dalkey","doi":"10.3160/0038-3872-115.3.141","DOIUrl":"https://doi.org/10.3160/0038-3872-115.3.141","url":null,"abstract":"The coastal cactus wren (Camphylorhnchus brunneicapillus) is a charismatic, though sedentary bird that inhabits thickets of prickly pear (Opuntia littoralis and O. oricola) and coastal cholla (Cylindropuntia prolifera) in the coastal sage scrub and chaparral habitats of southern California and Baja California, Mexico1 (Rea and Weaver 1990). Urbanization that took place during the past century, with its attendant habitat loss, has deleteriously impacted this species. On the Palos Verdes Peninsula, coastal cactus wrens occupy cactus habitat contained within the five-hectare Palos Verdes Nature Preserve (Preserve) and undeveloped tracts interspersed between the Preserve and urban development. As such, it is an isolated population that faces threats through loss of genetic diversity. Recently, two independent investigations have converged to demonstrate a remarkable instance of site fidelity by a single individual. During 2012 and 2013, biologists from the U. S. Geological Survey sampled 620 coastal cactus wrens in Ventura, Los Angeles, San Bernardino, Riverside, Orange, and San Diego Counties to assess the impacts of habitat fragmentation using contemporary genetic analysis (Barr et al. 2015). Birds that were captured for the genetic analysis were banded to prevent re-sampling individuals1. A total of eight individuals were captured and banded in the Preserve during the second year of this study. Each individual’s location and band number was recorded at capture and blood was drawn for the genetic analysis. In 2014, the Palos Verdes Peninsula Land Conservancy (Conservancy) initiated a Citizen Science Cactus Wren program to utilize volunteers to observe the coastal cactus wrens within the Preserve. The Conservancy manages and restores habitat within the Preserve for several special status species, as well as the coastal cactus wren. The program was designed to return information about how the wrens utilized their habitat, within both existing habitat and newly established areas of habitat. This is important information for the Conservancy in its mission to restore cactus stands within the Preserve’s coastal sage scrub habitat. The volunteers conducted weekly surveys within the Preserve’s Alta Vicente Reserve from March through July during the breeding seasons in 2014 and 2015. The surveys were conducted for 20 minute periods at specifically delineated territorial polygons within areas referred to as West and East (Fig. 1). Observations were recorded by the minute and included number of cactus wrens (adult, juvenile, or unknown), presence of predators, and several qualitative behavior patterns from which frequencies could be computed (Table 1). For these surveys, the enthusiastic volunteers took to the field outfitted with binoculars, spotting scopes, and cameras equipped with telephoto lenses. That coastal cactus wrens spend most of their time moving within the cactus thickets, rising above the cactus for only brief moments, is reflected by the data ","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"54 1","pages":"141 - 145"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82875968","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}

{"title":"Gonadal Restructuring During Sex Transition in California Sheephead: a Reclassification Three Decades After Initial Studies.","authors":"Michael A Sundberg,&nbsp;Kerri A Loke,&nbsp;Christopher G Lowe,&nbsp;Kelly A Young","doi":"10.3160/0038-3872-108.1.16","DOIUrl":"https://doi.org/10.3160/0038-3872-108.1.16","url":null,"abstract":"<p><p>California Sheephead, <i>Semicossyphus pulcher</i>, is a monandric protogynous hermaphrodite and a commercially and recreationally valuable labrid. Gonadal functionality of Sheephead through sex change was reclassified into nine classes using current criteria for categorization. Female ovaries were classified as immature, early maturing, mature, and regressing/recovering classes. Transition from female to male and subsequent male development was divided into early, mid and late transitional, developing/active male and regressing/recovering male. Reproductive states in Sheephead were correlated with estradiol (E2) and 11-keto testosterone (11-KT) concentrations in the blood plasma. All sexes had low E2 concentrations in the fall /winter seasons; in transitional and male individuals, levels remained low throughout the year. In contrast, female E2 concentrations were elevated in spring and peaked in the summer. Concentrations of 11-KT were variable throughout the year; however, females had significantly lower levels in the summer. This study allows a better understanding of the current state of California Sheephead in a heavily fished area. Knowledge of a species' reproductive characteristics is important in evaluating the sustainability of a population as it can set a baseline for reproductive potential. This research takes a critical step in gathering and organizing reproductive data such that it may be used in future studies for comparing reproductive potential across the range of the California sheephead.</p>","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"108 1","pages":"16-28"},"PeriodicalIF":0.0,"publicationDate":"2009-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3160/0038-3872-108.1.16","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33205840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Newly Adventive Ant of the Genus Pheidole in Southern California (Hymenoptera: Formicidae)","authors":"R. Snelling","doi":"10.5281/ZENODO.24738","DOIUrl":"https://doi.org/10.5281/ZENODO.24738","url":null,"abstract":"","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"324 2","pages":"121-125"},"PeriodicalIF":0.0,"publicationDate":"1992-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72472814","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}

{"title":"A New Species of Hippolytid Shrimp from the West Coast of Mexico","authors":"M. Wicksten","doi":"10.1016/0198-0254(87)91008-9","DOIUrl":"https://doi.org/10.1016/0198-0254(87)91008-9","url":null,"abstract":"","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"22 1","pages":"27-33"},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83528395","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}

{"title":"A Revision of the Honey Ants, Genus Myrmecocystus, First Supplement (Hymenoptera: Formicidae)","authors":"R. Snelling","doi":"10.5281/ZENODO.24735","DOIUrl":"https://doi.org/10.5281/ZENODO.24735","url":null,"abstract":"","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"35 1","pages":"69-86"},"PeriodicalIF":0.0,"publicationDate":"1982-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91298117","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}

{"title":"The Taxonomy and Distribution of Some North American Pogonomyrmex and Descriptions of Two New Species (Hymenoptera: Formicidae)","authors":"R. Snelling, Norm Johnson, Joe Cora","doi":"10.5281/ZENODO.24734","DOIUrl":"https://doi.org/10.5281/ZENODO.24734","url":null,"abstract":"","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"3 1","pages":"97-112"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82386950","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}

{"title":"A New Species of Simopelta from Costa Rica (Hymenoptera: Formicidae)","authors":"R. Snelling, Norm Johnson, Joe Cora","doi":"10.5281/ZENODO.24726","DOIUrl":"https://doi.org/10.5281/ZENODO.24726","url":null,"abstract":"","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"13 1","pages":"16-17"},"PeriodicalIF":0.0,"publicationDate":"1971-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82927981","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}

{"title":"The Female of Eucryptocerus placidus (F. Smith) (Hymenoptera: Formicidae)","authors":"R. Snelling","doi":"10.5281/ZENODO.24719","DOIUrl":"https://doi.org/10.5281/ZENODO.24719","url":null,"abstract":"","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"21 1","pages":"37-40"},"PeriodicalIF":0.0,"publicationDate":"1966-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72725967","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}

{"title":"Studies on California Ants. 1. Leptothorax hirticornis Emery, a New Host and Descriptions of the Female and Ergatoid Male (Hymenoptera: Formicidae)","authors":"R. Snelling, Norm Johnson, Joe Cora","doi":"10.5281/ZENODO.24717","DOIUrl":"https://doi.org/10.5281/ZENODO.24717","url":null,"abstract":"","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"48 1","pages":"16-21"},"PeriodicalIF":0.0,"publicationDate":"1965-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84680604","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}

{"title":"Studies on California Ants. 2. Myrmecina california M. R. Smith (Hymenoptera; Formicidae)","authors":"R. Snelling, Norm Johnson, Joe Cora","doi":"10.5281/ZENODO.24718","DOIUrl":"https://doi.org/10.5281/ZENODO.24718","url":null,"abstract":"","PeriodicalId":90803,"journal":{"name":"Bulletin (Southern California Academy of Sciences)","volume":"68 1","pages":"101-105"},"PeriodicalIF":0.0,"publicationDate":"1965-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86280401","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}