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Carbon stock and dynamic in the middle Xingu forests at eastern Amazonia 亚马逊东部新谷中部森林碳储量及其动态
IF 0.9 Q4 ECOLOGY Pub Date : 2022-11-27 DOI: 10.1080/23766808.2022.2148438
J. Costa, Emil José Hernández Ruz, Graciliano Galdino Alves Dos Santos
ABSTRACT Studies on the quantification and spatial distribution of stored carbon, as well as the potential for carbon uptake by forests, are of great importance. We assessed the spatial distribution and dynamic of carbon in forest plots in the Middle Xingu. These plots are part of the vegetation monitoring area of the Belo Monte Dam. We estimated the biomass of trees with diameter at breast height (DBH) ≥10 cm using an allometric equation with forest inventory data in the eastern Amazonian region in the Xingu River area. We evaluated the vegetation structure and carbon stock dynamic in 2012, 2014, and 2016, and temporal effects on carbon uptake. The periodic annual increase in carbon was significantly higher between 2012 and 2014 (2.5 Mg ha−1) than between 2014 and 2016 (1.84 Mg ha−1). Plant biomass was highly influenced by the abundance of species with low diameters (between 10 cm and 50 cm DBH). Despite the mortality rate being higher than the recruitment in the second period (2014–2016), we found that the forest did function as a carbon sink but showing increases in carbon emissions.
摘要研究储存碳的量化和空间分布,以及森林吸收碳的潜力,具有重要意义。对新谷中部林分碳的空间分布和动态进行了评价。这些地块是贝洛蒙特大坝植被监测区的一部分。我们使用异速生长方程和新古河地区亚马逊东部地区的森林存量数据估计了胸径(DBH)≥10cm的树木的生物量。我们评估了2012年、2014年和2016年的植被结构和碳储量动态,以及对碳吸收的时间影响。2012年至2014年,碳的周期性年增长率(2.5 Mg ha−1)明显高于2014年至2016年(1.84 Mg ha–1)。植物生物量在很大程度上受到低直径(DBH在10厘米到50厘米之间)物种丰度的影响。尽管死亡率高于第二阶段(2014-2016年)的招募,但我们发现森林确实起到了碳汇的作用,但碳排放量有所增加。
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引用次数: 0
Are white-lipped peccaries from Argentinean Yungas looking to a promising future? 来自阿根廷Yungas的白唇鱼的前景光明吗?
IF 0.9 Q4 ECOLOGY Pub Date : 2022-11-21 DOI: 10.1080/23766808.2022.2148434
Juan I. Reppucci, S. de Bustos, Flavia Caruso, Rocio S. Fleitas Quintana, P. Perovic
ABSTRACT The white-lipped peccary (Tayassu pecari) is considered a key species for its role as an ecosystem engineer. Given their important ecological function, there is a great concern in the scientific community regarding the many reports of disappearances or great abundance reductions throughout its distribution (from southern Mexico to northern Argentina). Based on an extensive survey effort, we report new data of presence of WLP after a period of no detections in the Argentine Yungas. The study was conducted in the Yungas ecoregion, provinces of Jujuy and Salta, Argentina. Data was collected from camera trap, direct sightings and footprints during 2013–2021. From a total of 30,186 trap nights, we obtained 8 WLP detections. There were no detections before 2017, while as of 2018 there was at least one camera trap record in each of the years. Additionally, opportunistic records were obtained yearly from 2019 to 2021. The period without detections could be related to a period of a population cycle, as suggested in different regions of America during the last century, being disease the most likely cause. These cycles generally follow a pattern of a rapid population decline, a period of absence or low abundance followed by slow population growth. We believe that if the trend continues and the number of detections increases, we could be facing the early stages of the increase phase in the WLP population cycle in the Argentine Yungas. This type of report is important to document and contribute to a better understanding of the WLP population cycle process.
摘要白唇pecari (Tayassu pecari)被认为是生态系统工程师的关键物种。鉴于其重要的生态功能,科学界对其整个分布(从墨西哥南部到阿根廷北部)的许多消失或丰度大幅减少的报告非常关注。基于广泛的调查工作,我们报告了阿根廷Yungas在一段时间未检测到WLP后存在的新数据。这项研究是在阿根廷胡胡伊省和萨尔塔省的Yungas生态区进行的。2013-2021年期间,通过相机陷阱、直接目击和足迹收集数据。从总共30186个陷阱夜中,我们获得了8个WLP探测。2017年之前没有检测到,而截至2018年,每年至少有一个相机陷阱记录。此外,从2019年到2021年,每年都获得机会记录。没有发现的时期可能与人口周期的一个时期有关,正如上个世纪美国不同地区所表明的那样,疾病是最可能的原因。这些周期通常遵循这样一种模式:人口迅速下降,一段时间缺乏或低丰度,然后是人口缓慢增长。我们认为,如果这一趋势继续下去,检测到的数量增加,我们可能会面临阿根廷Yungas WLP种群周期增长阶段的早期阶段。这种类型的报告对于记录和有助于更好地了解WLP种群周期过程非常重要。
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引用次数: 1
Cooperative harassment strategy by the European Starling to usurp cavities and reproductive cost for the neotropical Green-barred Woodpecker 欧洲椋鸟的合作骚扰策略,以篡夺新热带绿斑啄木鸟的蛀牙和繁殖成本
IF 0.9 Q4 ECOLOGY Pub Date : 2022-11-11 DOI: 10.1080/23766808.2022.2145089
Paula A. Gerstmayer, Virginia Monges, Adrián Jauregui, M. Colombo, L. Segura
ABSTRACT The European Starling (Sturnus vulgaris) is a cavity-nesting bird with great invasive potential. As a result of human intervention, this bird is now distributed across all continents (except Antarctica) and its distribution range is increasing at an alarming rate. The European Starling was introduced to Argentina in 1983 and is currently distributed across almost the entire country. It is considered one of the hundred most damaging invasive species in the world and constitutes a serious competitive threat to native cavity-nesting birds. Interactions between European Starlings and cavity-nesting birds generally have negative consequences on native bird populations, although there are still few reports in the literature that account for the degree of damage. In this study, we report for the first time details of the harassment strategy and subsequent cavity usurpation by European Starlings on a breeding pair of Green-barred Woodpeckers (Colaptes melanochloros) in an urban area of central-eastern Argentina. Over one breeding season, the woodpeckers excavated seven cavities, none of which were successful. In six of these reproductive attempts (86%) we recorded interactions with European Starlings and in five (71%) the cavity was usurped. On three occasions we recorded a cooperative harassment strategy by a group of European Starlings causing the woodpeckers to abandon the cavity. Our report is especially relevant if we consider the invasive potential of the European Starling worldwide and the frequently limited cavity supply in bird breeding habitats. Therefore, we encourage governmental authorities and environmental NGOs to take measures to control the populations of this aggressive invasive species.
欧洲椋鸟(Sturnus vulgaris)是一种具有巨大入侵潜力的腔巢鸟类。由于人类的干预,这种鸟现在分布在所有大陆(南极洲除外),其分布范围正以惊人的速度增加。欧洲椋鸟于1983年被引入阿根廷,目前分布在几乎整个国家。它被认为是世界上100种最具破坏性的入侵物种之一,对本土洞穴筑巢的鸟类构成了严重的竞争威胁。欧洲椋鸟和洞巢鸟之间的相互作用通常会对本地鸟类种群产生负面影响,尽管文献中仍然很少有关于损害程度的报道。在这项研究中,我们首次报道了欧洲椋鸟在阿根廷中东部城市地区对一对繁殖的绿斑啄木鸟(Colaptes melanochloros)的骚扰策略和随后的腔篡夺的细节。在一个繁殖季节里,啄木鸟挖了七个洞,没有一个成功。在这些繁殖尝试中,我们记录了6次(86%)与欧洲椋鸟的相互作用,在5次(71%)中,腔被侵占。我们有三次记录到一群欧洲椋鸟的合作骚扰策略,导致啄木鸟放弃了洞穴。如果我们考虑到欧洲椋鸟在世界范围内的入侵潜力和鸟类繁殖栖息地中经常有限的腔供应,我们的报告尤其相关。因此,我们鼓励政府当局和环保非政府组织采取措施控制这种侵略性入侵物种的数量。
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引用次数: 0
How do assemblages of epigeal Araneae and Coleoptera respond to changes in habitat structure caused by sugar cane crops in Northern Argentina? 阿根廷北部的上蛛目和鞘翅目群落如何响应甘蔗作物引起的栖息地结构变化?
IF 0.9 Q4 ECOLOGY Pub Date : 2022-10-18 DOI: 10.1080/23766808.2022.2131311
Hb Macagno, Ax González-Reyes, Ja Corronca, Sm Rodríguez-Artigas, G. Flores
ABSTRACT In Northwest Argentina, nothing is known about the relationship of Araneae and Coleoptera with sugar cane crops. Using pitfall traps in three continuous native forest sites (N) and three native forest windbreaks surrounded by sugar cane crops (W) in the province of Salta, we assessed a)- whether the native diversity of epigeal Araneae and Coleoptera in the Chaco Serrano forest changes as a result of the fragmentation of the habitat caused by the sugar cane plots, and b)- whether the diversity of predatory species increases in native forest windbreaks as a consequence of the contribution of species that come from crops. In the spring of 2006 and the summer of 2007, we collected 599 Araneae and 555 Coleoptera, with community W (S = 132, N = 535) containing much more species but fewer individuals than community N (S = 111, N = 619). We found that the spatial and phenological patterns of the alpha and beta diversities of N were altered in W communities. Thus, habitat fragmentation generated by sugar cane plots led to the local extinction of native Araneae and Coleoptera species. The abundance of generalist Araneae and herbivorous Coleoptera increased in W habitats, but the coprophagous and detritivorous beetles decreased. The diversity of predatory species (Araneae and some Coleoptera) increased in W habitats, although their abundance declined relative to N habitats. Species turnover determined beta diversity between N and W sites; however, between the W sites, nestedness increased and spiders showed a greater loss of species. The spatial heterogeneity between sites, seasons, and habitats had a substantial effect on the composition of the Araneae and Coleoptera assemblages, hence influencing regional diversity. Eight species were habitat indicators, particularly Leprolochus birabeni (Zodariidae), which responds unfavourably to perturbations in the agricultural landscape, and could be deployed as environmental monitors in the Chaco Serrano.
摘要在阿根廷西北部,人们对蜘蛛目和鞘翅目与甘蔗作物的关系一无所知。在萨尔塔省三个连续的原生森林点(N)和三个被甘蔗作物包围的原生森林防风林(W)中使用陷阱,我们评估了a)-Chaco Serrano森林中表生蜘蛛目和鞘翅目的原生多样性是否因甘蔗地造成的栖息地破碎化而发生变化,以及b)-原生森林防风林中捕食性物种的多样性是否因作物物种的贡献而增加。在2006年春季和2007年夏季,我们收集了599个蜘蛛目和555个鞘翅目,其中W群落(S=132,N=535)包含的物种比N群落(S=111,N=619)多得多,但个体更少。我们发现,W群落中N的α和β多样性的空间和表型模式发生了改变。因此,甘蔗地造成的栖息地破碎化导致本地蜘蛛目和鞘翅目物种在当地灭绝。W栖息地的多面虫和草食性鞘翅目的数量增加,但食粪和食碎屑的甲虫数量减少。W栖息地的捕食性物种(Araneae和一些鞘翅目)的多样性增加,尽管它们的丰度相对于N栖息地有所下降。物种更替决定了N和W站点之间的β多样性;然而,在W位点之间,蜘蛛的巢密度增加,物种损失更大。地点、季节和栖息地之间的空间异质性对蜘蛛目和鞘翅目组合的组成产生了重大影响,从而影响了区域多样性。有八个物种是栖息地指标,特别是对农业景观的扰动反应不利的双斑小蠊(Zodaridae),可以作为Chaco Serrano的环境监测器。
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引用次数: 0
Movement and habitat use of three high Andean rodent species (Cricetidae: Sigmodontinae) in Andean páramos of Ecuador 厄瓜多尔安第斯地区三种高安第斯啮齿动物(蟋蟀科:Sigmodontinae)的迁徙和栖息地利用
IF 0.9 Q4 ECOLOGY Pub Date : 2022-10-12 DOI: 10.1080/23766808.2022.2132023
A. Villarreal, Ricardo Zambrano-Cevallos, J. Brito, Santiago F. Burneo
ABSTRACT The movements and habitat use of three species of Sigmodontine rodents (Akodon mollis, Phyllotis haggard and Thomasomys paramorum) from the high Andes of Ecuador were evaluated using the spool-and-line technique in four transects. The floristic composition was analyzed at sampling sites to explain how these three species of Sigmodontine rodents use the vegetation as a habitat. Rodents were captured using live Sherman traps and equipped with a spool-and-line device. Each thread trail was traced, and their nests, feeders and shelters were recorded using GPS receivers. Also, the construction materials, nest morphology and shelters used during foraging, and the food resources were described. These three rodent species overlap in their distribution, but they present certain preferences for different habitats such as grasslands, open areas with cushions and shrubs, respectively. This study is an approach to the natural history of these Sigmodontine rodents in high mountain elevations.
摘要利用线轴和直线技术对厄瓜多尔安第斯山脉高处三种Sigmodontine啮齿动物(Akodon mollis、Phyllotis haggard和Thomasomys paramorum)的活动和栖息地利用进行了评估。在采样点分析了区系组成,以解释这三种Sigmodontine啮齿动物是如何利用植被作为栖息地的。啮齿动物是用活的谢尔曼陷阱捕获的,并配备了线轴和绳索装置。追踪每一条线索,并使用GPS接收器记录它们的巢穴、喂食器和庇护所。此外,还介绍了觅食时使用的建筑材料、巢穴形态和庇护所,以及食物资源。这三种啮齿动物的分布重叠,但它们对不同的栖息地有一定的偏好,如草地、有垫子的开阔地带和灌木。这项研究是对这些Sigmodontine啮齿动物在高海拔地区的自然历史的一种研究。
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引用次数: 1
Primer registro del polluelo y nuevos datos del nido del Autillo Rojizo (Megascops ingens) (Strigiformes: Strigidae) en Zamora Chinchipe, sureste de Ecuador 厄瓜多尔东南部萨莫拉·钦奇佩(Zamora Chinchipe)的第一次小鸡登记和红鳍金枪鱼(Megascops Ingens)巢穴的新数据(Strigiformes:Strigidae)
IF 0.9 Q4 ECOLOGY Pub Date : 2022-10-08 DOI: 10.1080/23766808.2022.2123729
Leonardo Ordóñez-Delgado, Freddy Ramon Castillo, Angel Pineda Díaz
Laboratorio de Ecología Tropical y Servicios Ecosistémicos – EcoSS Lab, Departamento de Ciencias Biológicas, Universidad Técnica Particular de Loja, Loja, Ecuador; Museo de Zoología, Universidad Técnica Particular de Loja, Loja, Ecuador; Gobierno Autónomo Descentralizado Parroquial de Valladolid, Ecuador; Ministerio del Ambiente Agua y Transición Ecológica, Administración Reserva Biológica Cerro Plateado, Ecuador
热带生态学和生态系统服务实验室-厄瓜多尔洛哈私立技术大学生物科学系生态实验室;厄瓜多尔洛哈私立技术大学动物博物馆;厄瓜多尔巴利亚多利德教区权力下放自治政府;厄瓜多尔塞罗·普拉塔多生物保护区水与生态转型管理部
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引用次数: 0
Una nueva especie de Pristimantis (Anura: Strabomantidae) de la provincia del Azuay, Andes sur de Ecuador 来自厄瓜多尔安第斯山脉南部阿祖伊省的一新种原始螳螂(无尾猿:Strabomantidae)
IF 0.9 Q4 ECOLOGY Pub Date : 2022-10-08 DOI: 10.1080/23766808.2022.2123731
J. C. Sánchez-Nivicela, Eduardo Toral-Contreras, Verónica L. Urgiles
RESUMEN En este estudio, basándonos en evidencias morfológicas y moleculares, describimos una nueva especie del género Pristimantis que habita en las montañas y valles áridos de la provincia del Azuay, incluyendo zonas urbanas y periurbanas de la ciudad de Cuenca. La nueva especie se destaca por presentar una textura dermal externa fuertemente granulada, una papilla proyectada en la punta del hocico y un canto de advertencia que consiste en series combinadas de tres y dos notas, Morfológicamente, la nueva especie es similar con P. cajamarcensis, P. ceuthospilus, P. jimenezi, P. lojanus, P. phoxocephalus y P torresi, por presentar una quilla en la punta del hocico, sin embargo, su textura dermal fuertemente granular, ausencia de tubérculos, y su coloración rosácea con reticulaciones irregulares oscuras y una características barra interorbital blanca, la distinguen de estas especies. Con P. cajamarcensis, P. ceuthopilus y otras dos especies con incertidumbre taxonómica, forma un clado distribuido en el sur de Ecuador y norte de Perú. Nuestros resultados resaltan la importancia de aumentar estudios taxonómicos a fin de documentar eficazmente la biodiversidad en la región andina, así como, la importancia de desarrollar planes de monitoreo y conservación que incluyan a especies que habitan en áreas urbanas y semiurbanas.
最后,我们提出了一种假设,即在一个国家的领土上,在一个国家的领土上,在一个国家的领土上,在一个国家的领土上,在一个国家的领土上,在一个国家的领土上,在一个国家的领土上,在一个国家的领土上,在一个国家的领土上,在一个国家的领土上,在一个国家的领土上,在一个国家的领土上,在一个国家的领土上,在一个国家的领土上,在一个国家的领土上。提出一个新的物种指出了构dermal外部强烈之处,一个困境是在鼻子和尖的计划获得联合警告即在系列3年和2,形态学笔记,新的物种是类似cajamarcensis疟原虫、ceuthospilus、jimenezi、P lojanus phoxocephalus P torresi提出一个龙骨,吻尖,然而,其质感dermal抓住粒、块茎作物,它的粉红色,不规则的深色网状结构和典型的白色眶间条,将它与这些物种区分开来。与P. cajamarcensis、P. ceuthopilus和其他两个分类学上不确定的物种一起,它形成了一个分布在厄瓜多尔南部和秘鲁北部的分支。我们的研究结果强调了加强分类学研究的重要性,以有效地记录安第斯地区的生物多样性,以及制定监测和保护计划的重要性,包括生活在城市和半城市地区的物种。
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引用次数: 0
Influence of predator density in foraging behavior and microhabitat choice on litter-dwelling scorpions 捕食者密度对凋落物蝎觅食行为和微生境选择的影响
IF 0.9 Q4 ECOLOGY Pub Date : 2022-09-21 DOI: 10.1080/23766808.2022.2126020
Vinicius B. Pessoa, G. J. Moura, A. Lira
ABSTRACT The presence of a predator can cause behavioral changes in its prey, such as decreased foraging activity. Previous studies have indicated that the scorpion Ananteris mauryi has the ability to identify the chemical traces of its intraguild predator Tityus pusillus, causing it to reduce its exploratory activity. In this study, the foraging activities of A. mauryi in a natural environment with different densities of T. pusillus were compared. The study was carried out through active searches from 19:00 to 22:00 in five fragments of the Atlantic Forest in Pernambuco, Brazil, one having a low density of T. pusillus and four returning high densities. In total, 81 individuals of A. mauryi were observed, and 49.4% were recorded in the area with a low density of T. pusillus. In general, A. mauryi individuals exhibited a similar foraging activity in the fragment with low and higher density of T. pusillus. Similarly, A. mauryi was found on leaf litter bottom layers independently of T. pusillus density. Therefore, our results suggest that their predator density does not exert any influence on foraging activity and microhabitat choice in A. mauryi.
摘要捕食者的存在会导致猎物的行为发生变化,例如觅食活动减少。先前的研究表明,蝎Ananteris mauryi有能力识别其体内捕食者Tityus pusilus的化学痕迹,从而降低其探索活动。本研究比较了毛白杨在不同密度的自然环境中的觅食活动。这项研究是在19:00至22:00期间对巴西伯南布哥大西洋森林的五个碎片进行的积极搜索,其中一个碎片密度较低,四个碎片密度较高。总共观察到81个毛耳球虫个体,49.4%的个体记录在低密度毛耳蠊区域。总体而言,A.mauryi个体在T.pusilus密度较低和较高的碎片中表现出相似的觅食活动。类似地,在落叶层底层发现了A.mauryi,与T.pusilus的密度无关。因此,我们的研究结果表明,它们的捕食者密度对毛白杨的觅食活动和微栖息地选择没有任何影响。
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引用次数: 0
Contribution to the knowledge of non-native fishes in reservoirs in the Magdalena River basin: the study case Piedras blancas reservoir 对马格达莱纳河流域水库中非本地鱼类知识的贡献:以Piedras blancas水库为例
IF 0.9 Q4 ECOLOGY Pub Date : 2022-07-28 DOI: 10.1080/23766808.2022.2104971
Daniel Restrepo Santamaria, Daniel Valencia-Rodríguez, J. Herrera-Pérez, Sebastián Muñoz-Duque, Andrés Felipe Galeano, L. Jiménez-Segura
ABSTRACT The habitat fragmentation caused by reservoir construction in different aquatic systems in the Magdalena River basin is a latent threat to the diversity of fishes and aquatic environments in the Andean region of Colombia. Contributing to the knowledge about how fish assemblages are formed in these scenarios is fundamental for the management and decision-making on the aquatic resources of the basin. In this communication, we describe the results of a fish characterization in the area of influence of the Piedras Blancas reservoir, a high Andean reservoir built for hydroelectric power generation. Only three species of fish that make up the evaluated assemblage were captured, and two of them, Cyprinus carpio and Xiphophorus maculatus, are not native to the basin. Possibly, with a greater sampling effort, more species can be found. The native species Hemibrycon sp. is distributed mainly in a creek, while in the reservoir, the introduced species dominate. The environmental variables were in optimal ranges for the development of life in the evaluated environments. It is important to advance the knowledge about the distribution of the introduced and native species in the basin to generate recommendations that contribute to the management of these species in the aquatic systems of Colombian Andes.
摘要马格达莱纳河流域不同水系的水库建设造成的栖息地破碎化对哥伦比亚安第斯地区鱼类和水生环境的多样性构成了潜在威胁。了解在这些情况下鱼类群落是如何形成的,对于流域水生资源的管理和决策至关重要。在这封信中,我们描述了Piedras Blancas水库影响区的鱼类特征描述结果,这是一座为水力发电而建造的安第斯高水库。仅捕获了构成评估组合的三种鱼类,其中两种,鲤鱼和斑剑鱼,不是该流域的本地鱼类。也许,只要加大采样力度,就能发现更多的物种。本地物种Hemibrycon sp.主要分布在小溪中,而在水库中,引入物种占主导地位。环境变量处于评估环境中生命发展的最佳范围内。重要的是要提高对引进物种和本地物种在流域中分布的了解,以提出有助于管理哥伦比亚安第斯山脉水生系统中这些物种的建议。
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引用次数: 0
Evaluation of somatic indexes in the endangered and endemic killifish Tlaloc hildebrandi (Cyprinodontiformes: profundulidae) 濒危和特有种鳉鱼(鳉鱼目:深鳍鳉科)体细胞指标的评价
IF 0.9 Q4 ECOLOGY Pub Date : 2022-07-14 DOI: 10.1080/23766808.2022.2096533
M. J. Anzueto-Calvo, E. Velázquez-Velázquez, G. Ruiz-Campos, Brenda G. Cruz Maza, Sara E. Domínguez-Cisneros
ABSTRACT Tlaloc hildebrandi is a small (<130 mm) freshwater fish endemic to Southwest Mexico and is listed as endangered through habitat loss and invasive species. We determine and compare the parameters of the length–weight relationship, relative weight, and condition factor among different populations of the endemic killifish, T. hildebrandi. Fulton’s condition factor (K), relative weight (Wr), and the length–weight relationship were estimated for three killifish populations throughout its distribution range in the highlands of Chiapas, México. The Wr was significantly lowest in fishes where there are higher anthropogenic activities. The somatic indexes and the length–weight relationships for T. hildebrandi are hereby published for the first time in both the scientific literature and databases, such as Fishbase.
hildebrandi是墨西哥西南部特有的一种小型(<130毫米)淡水鱼,因栖息地丧失和入侵而被列为濒危物种。我们确定并比较了当地鳉鱼(T. hildebrandi)不同种群的长度-重量关系、相对重量和条件因子参数。对墨西哥恰帕斯高原3个鳉鱼种群在整个分布范围内的富尔顿条件因子(K)、相对重量(Wr)和长重关系进行了估算。在人为活动较多的鱼类中,Wr显著最低。本文首次在科学文献和Fishbase等数据库中公布了T. hildebrandi的体细胞指标和长权关系。
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引用次数: 0
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Neotropical Biodiversity
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