Journal of Vertebrate Biology最新文献

{"title":"On the taxonomic status of Dendropsophus koechlini (Duellman & Trueb, 1989)","authors":"P. Melo-Sampaio","doi":"10.25225/jvb.23022","DOIUrl":"https://doi.org/10.25225/jvb.23022","url":null,"abstract":"Abstract. Hyla pauiniensis was described from the municipality of Pauini, Amazonas, Brazil, 45 years ago and allocated to the Hyla parviceps group. Since then, no additional information has been provided for this species. A similar taxon, Hyla koechlini, was described from the vicinity of Puerto Maldonaldo, Madre de Dios, Peru, and diagnosed from H. pauiniensis by chevrons with a more transverse orientation in H. pauiniensis and by the cream-coloured thigh spot in H. pauiniensis, which differs from the uniformly black thigh in H. koechlini. Since their description, a taxonomic revision transferred several species of Hyla with 30 chromosomes to the genus Dendropsophus, and more species were added to the Dendropsophus parviceps group. Based on the analysis of museum specimens and the direct examination of the holotype of Dendropsophus pauiniensis, combined with images of specimens of the type series of Dendropsophus koechlini, I find that these species do not differ in body size, dorsal skin texture, or body colour. Thus, I relegate D. koechlini as a synonym of D. pauiniensis.","PeriodicalId":48482,"journal":{"name":"Journal of Vertebrate Biology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69418140","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":"Socio-environmental changes and rodent populations in lowland agroecosystems of the lower delta of the River Senegal, West Africa: results of observations over a decade, 2008-2019","authors":"C. T. Niang, M. Kane, Y. Niang, Nathalie Sarr, L. March, C. Tatard, E. Artige, C. Diagne, V. Moron, J. Mauffrey, C. Noûs, K. Bâ, I. Laffont-Schwob, A. Bal, A. Dalecky","doi":"10.25225/jvb.22015","DOIUrl":"https://doi.org/10.25225/jvb.22015","url":null,"abstract":"Abstract1. In the context of food self-sufficiency, the River Senegal Valley has been undergoing profound environmental changes for several decades. Rice production has increased due to the development of vast irrigated perimeters, which has been accompanied by recurrent proliferations of rodent populations that are crop pests and reservoirs of zoonoses. The aim of our study was to determine the factors underlying these phases of increased rodent abundance over a ten-year (2008 to 2019) sampling period during the hot dry season (February-May). A total of 1,867 rodents of four species were captured, among which Arvicanthis niloticus and Mastomys huberti dominated. Our results showed that, during this season, rodent abundance (i) increases significantly with rainfall from the previous year, (ii) is higher in cultivated than in uncultivated plots, (iii) increases with plant cover, (iv) increases, for M. huberti, with the presence of open water. We showed that in an area that was first sparsely cultivated and then impacted by hydro-agricultural rehabilitation of irrigation and drainage infrastructure, the abundance of A. niloticus changed following this program, reaching the level of a nearby area that has been intensively cultivated for decades. Moreover, we showed that the proportion of adults among the captured individuals was lower in rice plots than in vegetable gardening fields and uncultivated plots. The breeding pattern of adult individuals was also affected by land use. Results suggest that uncultivated areas and vegetable gardening fields constitute refuge and breeding ground hotspots and would thus form a starting point for the invasion of rice fields. Following these results, we advocate for regular monitoring of rodent breeding and abundance patterns, with a special focus on these refuge areas, particularly during the hot dry season. We recommend implementing effective and sustainable science-based control strategies at national and community levels to keep rodent populations within tolerable limits.","PeriodicalId":48482,"journal":{"name":"Journal of Vertebrate Biology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69418599","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":"Is gynogenetic reproduction in gibel carp (Carassius gibelio) a major trait responsible for invasiveness?","authors":"M. Fuad, L. Vetešník, A. Šimková","doi":"10.25225/jvb.21049","DOIUrl":"https://doi.org/10.25225/jvb.21049","url":null,"abstract":"Abstract. The invasion success of gibel carp (Carassius gibelio) depends on demographic and competitive traits. The major biological trait responsible for the invasiveness of C. gibelio is the mode of reproduction. Apart from sexual reproduction, which is typical in fish, C. gibelio is a unique cyprinid species able to reproduce through asexual gynogenesis, which is also known as sperm-dependent parthenogenesis, observed in all-female populations. Though the sexual and asexual forms of C. gibelio co-exist widely in natural habitats, the gynogenetic form has the capacity to modulate the range of effective ecological niches, which may facilitate the process of invasion. In this paper, we reviewed current knowledge of the sexual and gynogenetic forms of gibel carp along with their physiological advantages, immunological traits, and ability to withstand different environmental conditions. As parasitic infection may directly alter the immunology of hosts, and also indirectly alter their investment in reproduction, we provide some insights into the role of parasites as one of the potential drivers facilitating the coexistence of asexual and sexual forms. We highlight evidence that gibel carp have been identified as a serious threat to native species; hence, its impact on the ecosystem is also discussed.","PeriodicalId":48482,"journal":{"name":"Journal of Vertebrate Biology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69418562","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}