المؤلفون: Daniel Stec, Matteo Vecchi, Magdalena Dudziak, Paul J. Bartels, Sara Calhim, Łukasz Michalczyk

المصدر: Zoological Letters, Vol 7, Iss 1, Pp 1-45 (2021)

مصطلحات موضوعية: cryptic taxa, DNA barcoding, egg ornamentation, new species, species complex, species delimitation, Zoology, QL1-991

الوصف: Abstract The taxonomy of many groups of meiofauna is challenging due to their low number of diagnostic morphological characters and their small body size. Therefore, with the advent of molecular techniques that provide a new source of traits, many cryptic species have started to be discovered. Tardigrades are not an exception, and many once thought to be cosmopolitan taxa are being found to be complexes of phenotypically similar species. Macrobiotus pallarii Maucci, 1954 was originally described in South Italy and has been subsequently recorded in Europe, America, and Asia. This allegedly wide geographic range suggests that multiple species may be hidden under this name. Moreover, recently, genetic evidence to support this was put forward, and the Macrobiotus pallarii complex has been proposed to accommodate putative species related to M. pallarii. Here, we describe three new pseudocryptic species based on populations that would have been all classified as Macrobiotus pallarii if molecular methods were not employed. Using an integrative taxonomy approach, we analyzed animals and eggs from the topotypic population of Macrobiotus pallarii, together with four other populations of the complex. We recovered four distinct phylogenetic lineages that, despite the overlap of morphometric traits, can be separated phenotypically by subtle but discrete morphological characters. One lineage corresponds to Macrobiotus pallarii, whereas the other three are newly described as Macrobiotus margoae Stec, Vecchi & Bartels, sp. nov. from the USA, Macrobiotus ripperi Stec, Vecchi & Michalczyk, sp. nov. from Poland and Finland, and Macrobiotus pseudopallarii Stec, Vecchi & Michalczyk, sp. nov. from Montenegro. To facilitate species identification, we provide a dichotomous key for species of the M. pallarii complex. Delimitation of these pseudocryptic taxa highlights the need for an integrative approach to uncover the phylum’s diversity in full.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2056-306XTest

الوصول الحر: https://doaj.org/article/371a507dd69b4650a1f97bf77a1ea254Test

المؤلفون: Érika Santos, Edivaldo Gomes Jr, Clélia M. C. da Rocha, Paul J. Bartels, Paulo Fontoura

المصدر: Iheringia: Série Zoologia, Vol 108, Iss 0 (2018)

مصطلحات موضوعية: Batillipedidae, Biogeography, meiofauna, Atlantic Ocean, Taxonomy, Zoology, QL1-991

الوصف: ABSTRACT Batillipes specimens collected in the Southwestern Atlantic Ocean, on the Brazilian Coast (Campos Basin and Potiguar Basin) with a bifurcated caudal appendage similar to B. dicrocercus Pollock, 1970 were assigned to B. potiguarensis Santos, da Rocha, Gomes Jr & Fontoura, 2017. This species was described as having a roundish caudal protrusion but, as shown in this study, it exhibits intraspecific variability of the morphology of the caudal apparatus. The examination of specimens of B. dicrocercus from the type locality (Massachussetts, U.S.A.) and the analysis of the original description and two subsequent emended descriptions, one from the Gulf of Mexico (U.S.A.) and another from the Mediterranean Sea, used for comparison, revealed important differences among them concerning important taxonomic characters, suggesting that what was considered a single species should now be split into three different species. Therefore, an emended diagnosis of B. potiguarensis and comments on the geographic distribution of B. dicrocercus are provided, clarifying the taxonomic status of the two species.

وصف الملف: electronic resource

العلاقة: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100241&lng=en&tlng=enTest; https://doaj.org/toc/1678-4766Test

الوصول الحر: https://doaj.org/article/399ce5149bf4449dbbd4eb22d55e893aTest

المؤلفون: Diane R. NELSON, Paul J. BARTELS

المصدر: Journal of Limnology, Vol 66, Iss 1s, Pp 104-110 (2007)

مصطلحات موضوعية: Meiofauna, biodiversity, species richness, biological inventory, Southern Appalachians, Geography. Anthropology. Recreation, Physical geography, GB3-5030, Environmental sciences, GE1-350

الوصف: For the past 5 years we have been conducting a large-scale, multi-habitat inventory of the tardigrades in the Great Smoky Mountains National Park (U.S.A.) as part of the All Taxa Biodiversity Inventory (ATBI) (see www.dlia.org). In terrestrial habitats, we collected moss, lichen, and soil samples from 19 permanent ATBI plots, representing all major land cover types within the park. Each ATBI plot is 100 × 100 m. In each plot, when available, 16 moss samples, 16 lichen samples, and 4 soil samples were collected in paper bags and air dried in the laboratory. Specimens were isolated with LudoxAM centrifugation, and for each sample up to 50 adults plus eggs were individually mounted on microscope slides in Hoyer's medium and identified using phase contrast and DIC microscopy. Additional collections were made in the limestone caves of the Cades Cove region of the park, bird nests, and 13 different streams. To date (1-Jun-06), 589 samples have been collected, and of these 401 have been analyzed, yielding a total of 8133 identifiable tardigrades or, in some cases, species groups. A total of 73 species have been found in the park, 14 of which we believe are new to science. Seven species richness estimators have been developed to predict total species richness (see EstimateS 7.5 software, viceroy.eeb.uconn.edu/estimates), and these were evaluated by comparing predictions from half of our data to the actual numbers from the total database. The results of this comparison indicate that different estimators work best in different habitats. Using the best estimators in each habitat, EstimateS 7.5 indicates that a total of 96 species are likely to occur throughout the park. Thus, Great Smoky Mountains National Park tardigrade diversity represents 10% of the world's known tardigrade fauna.

وصف الملف: electronic resource

العلاقة: http://www.jlimnol.it/index.php/jlimnol/article/view/213Test; https://doaj.org/toc/1129-5767Test; https://doaj.org/toc/1723-8633Test

الوصول الحر: https://doaj.org/article/11e9ef3ece104e53b03469b1604e8daeTest

المؤلفون: Diane R. Nelson, Paul J. Bartels

المصدر: Journal of Limnology, Vol 72, Iss 1s, Pp e18-e18 (2013)

مصطلحات موضوعية: soil ecology, leaf litter ecology, species diversity, species richness, community composition, biodiversity, Geography. Anthropology. Recreation, Physical geography, GB3-5030, Environmental sciences, GE1-350

الوصف: A large database now exists for tardigrades in the Great Smoky Mountains National Park (GSMNP) consisting of 780 samples, 15,618 specimens, and 80 species including 14 new to science. We found 43 species of tardigrades in 150 soil/leaf litter samples. We calculated the Chao 1 species richness estimate with the species accumulation curve for the GSMNP and confirmed that our species list is virtually complete. Compared with soil data from mt. Fuji, Japan, estimated species richness in GSMNP was significantly higher. In our comparison of previous studies of soil/leaf litter tardigrades in other geographic areas, only the Kanagawa prefecture of Japan reported a higher number of species (47) than the GSMNP. Species richness estimators are valuable tools for comparing diversity in different habitats, even when sampling effort varies between studies.

وصف الملف: electronic resource

العلاقة: http://www.jlimnol.it/index.php/jlimnol/article/view/759Test; https://doaj.org/toc/1129-5767Test; https://doaj.org/toc/1723-8633Test

الوصول الحر: https://doaj.org/article/eb6b1ddef00641478926253be863434aTest

المؤلفون: Daniel Stec (10887117), Matteo Vecchi (6338840), Magdalena Dudziak (5432366), Paul J. Bartels (10746801), Sara Calhim (191728), Łukasz Michalczyk (3208578)

مصطلحات موضوعية: Genetics, cryptic taxa, DNA barcoding, egg ornamentation, new species, species complex, species delimitation

الوصف: Additional file 11: SM.10. Results of PCA randomization tests.

العلاقة: https://figshare.com/articles/journal_contribution/Additional_file_11_of_Integrative_taxonomy_resolves_species_identities_within_the_Macrobiotus_pallarii_complex_Eutardigrada_Macrobiotidae_/14691990Test

الإتاحة: https://doi.org/10.6084/m9.figshare.14691990.v1Test

المؤلفون: Sebastian Orozco-Cubero, Monika Mioduchowska, Paul J. Bartels, Diane R. Nelson, Łukasz Kaczmarek, Magdalena Gawlak, Jorge Cortés, Paulo Fontoura

المصدر: Marine Biology Research. 17:120-166

مصطلحات موضوعية: 0106 biological sciences, animal structures, biology, Ecology, 010604 marine biology & hydrobiology, Meiobenthos, Biogeography, Biodiversity, Tardigrada, Aquatic Science, Oceanography, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, Geography, Central american, Tardigrade, Ecology, Evolution, Behavior and Systematics

الوصف: The Central American Isthmus has had profound effects on the evolution and distribution of larger marine organisms, but the impacts on meiobenthic animals have received little attention. Tardigrade...

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::a62c15b6556851471ee6a9e0e7aa1230Test
https://doi.org/10.1080/17451000.2021.1901936Test

المؤلفون: Victor K. Muposhi, Edson Gandiwa, Paul J. Bartels, S. M. Makuza, Tinaapi H. Madiri

مصطلحات موضوعية: Wildlife Ecology and Conservation Biology, Ecology, FOS Biological sciences, Environmental Science, Physical Sciences, Rangeland Degradation and Pastoral Livelihoods, Management, Monitoring, Policy and Law, Genomic Selection in Plant and Animal Breeding, Genetics, Biochemistry, Genetics and Molecular Biology, Life Sciences, Habitat Selection, Trophy, Geography, Rangeland, Competition biology, Biology, Archaeology

الوصف: The selective nature of trophy hunting may cause changes in desirable phenotypic traits in harvested species. A decline in trophy size of preferred species may reduce hunting destination competitiveness thus compromising the sustainability of trophy hunting as a conservation tool. We explored the trophy quality and trends in harvesting patterns (i.e., 2004-2015) of Cape buffalo (Syncerus caffer), African elephant (Loxodonta africana), greater kudu (Tragelaphus strepsiceros) and sable (Hippotragus niger) in Matetsi Safari Area, northwest Zimbabwe. We used long-term data on horn and tusk size, age, quota size allocation and offtake levels of selected species. To analyse the effect of year, area and age on the trophy size, quota size and offtake levels, we used linear mixed models. One sample t-test was used to compare observed trophy size with Safari Club International (SCI) minimum score. Trophy sizes for Cape buffalo and African elephant were below the SCI minimum score. Greater kudu trophy sizes were within ... : قد تسبب الطبيعة الانتقائية لصيد الكؤوس تغييرات في السمات الظاهرية المرغوبة في الأنواع المحصودة. قد يؤدي انخفاض حجم الكأس من الأنواع المفضلة إلى تقليل القدرة التنافسية لوجهة الصيد وبالتالي المساس باستدامة صيد الكأس كأداة للحفظ. استكشفنا جودة الكأس والاتجاهات في أنماط الحصاد (أي، 2004-2015) لجاموس كيب (سينسيروس كافير)، والفيل الأفريقي (لوكسودونتا أفريكانا)، والكودو الأكبر (Tragelaphus strepsiceros) والسمور (فرس النهر النيجر) في منطقة ماتيتسي سفاري، شمال غرب زيمبابوي. استخدمنا بيانات طويلة الأجل عن حجم القرن والأنياب والعمر وتخصيص حجم الحصة ومستويات الإزاحة للأنواع المختارة. لتحليل تأثير السنة والمساحة والعمر على حجم الكأس وحجم الحصة ومستويات الإزاحة، استخدمنا نماذج مختلطة خطية. تم استخدام عينة واحدة من اختبار t لمقارنة حجم الكأس المرصود مع الحد الأدنى لدرجة نادي سفاري الدولي (SCI). كانت أحجام الكؤوس لجاموس كيب والفيل الأفريقي أقل من الحد الأدنى لدرجة منظمة أنقذوا الأطفال الدولية. كانت أحجام جوائز كودو الأكبر ضمن الحد الأدنى للدرجة في حين كانت أحجام جوائز السمور أعلى من الحد الأدنى لدرجة منظمة رعاية الأطفال ...

العلاقة: https://dx.doi.org/10.60692/b7pne-qm840Test

الإتاحة: https://doi.org/10.60692/zxy8q-zj24710.60692/b7pne-qm840Test

المؤلفون: Victor K. Muposhi, Edson Gandiwa, Abel Chemura, Paul J. Bartels, S. M. Makuza, Tinaapi H. Madiri

مصطلحات موضوعية: Wildlife Ecology and Conservation Biology, Ecology, FOS Biological sciences, Environmental Science, Physical Sciences, Species Distribution Modeling and Climate Change Impacts, Ecological Modeling, Biodiversity Conservation and Ecosystem Management, Nature and Landscape Conservation, Habitat Selection, Habitat Suitability, Habitat Fragmentation, Species Distribution Modeling, Species Richness, Herbivore, Habitat, Ecosystem, Arid, Biology

الوصف: An understanding of the habitat selection patterns by wild herbivores is critical for adaptive management, particularly towards ecosystem management and wildlife conservation in semi arid savanna ecosystems. We tested the following predictions: (i) surface water availability, habitat quality and human presence have a strong influence on the spatial distribution of wild herbivores in the dry season, (ii) habitat suitability for large herbivores would be higher compared to medium-sized herbivores in the dry season, and (iii) spatial extent of suitable habitats for wild herbivores will be different between years, i.e., 2006 and 2010, in Matetsi Safari Area, Zimbabwe. MaxEnt modeling was done to determine the habitat suitability of large herbivores and medium-sized herbivores. MaxEnt modeling of habitat suitability for large herbivores using the environmental variables was successful for the selected species in 2006 and 2010, except for elephant (Loxodonta africana) for the year 2010. Overall, large herbivores ... : إن فهم أنماط اختيار الموائل من قبل الحيوانات العاشبة البرية أمر بالغ الأهمية للإدارة التكيفية، لا سيما نحو إدارة النظم الإيكولوجية والحفاظ على الحياة البرية في النظم الإيكولوجية للسافانا شبه القاحلة. لقد اختبرنا التوقعات التالية: (1) يؤثر توافر المياه السطحية وجودة الموائل والوجود البشري تأثيرًا قويًا على التوزيع المكاني للحيوانات العاشبة البرية في موسم الجفاف، (2) ستكون ملاءمة الموائل للحيوانات العاشبة الكبيرة أعلى مقارنة بالحيوانات العاشبة متوسطة الحجم في موسم الجفاف، و (3) سيكون النطاق المكاني للموائل المناسبة للحيوانات العاشبة البرية مختلفًا بين السنوات، أي عامي 2006 و 2010، في منطقة ماتيتسي سفاري، زيمبابوي. تم إجراء نمذجة MaxEnt لتحديد مدى ملاءمة الموائل للحيوانات العاشبة الكبيرة والحيوانات العاشبة متوسطة الحجم. كانت نمذجة MaxEnt لملاءمة الموائل للحيوانات العاشبة الكبيرة باستخدام المتغيرات البيئية ناجحة للأنواع المختارة في عامي 2006 و 2010، باستثناء الفيل (Loxodonta africana) لعام 2010. بشكل عام، تأثر احتمال حدوث الحيوانات العاشبة الكبيرة في الغالب بالمسافة من الأنهار. أثرت المسافة من الطرق على الكثير ...

العلاقة: https://dx.doi.org/10.60692/64par-xd731Test

الإتاحة: https://doi.org/10.60692/xtnmr-c4x3810.60692/64par-xd731Test

المؤلفون: Łukasz Kaczmarek, Paul J. Bartels, Diane R. Nelson

المصدر: Zootaxa. 4980(2)

مصطلحات موضوعية: Species complex, biology, Databases, Factual, National park, Ecology, Parks, Recreational, All-taxa biodiversity inventory, Biodiversity, biology.organism_classification, Tennessee, Nearctic ecozone, Period (geology), North Carolina, Tardigrada, Animals, Animal Science and Zoology, Taxonomy (biology), Tardigrade, Ecology, Evolution, Behavior and Systematics, Taxonomy

الوصف: One of the largest inventories of tardigrades ever conducted occurred from 2000–2010 in the Great Smoky Mountains National Park, USA. Over 16,000 specimens were catalogued, 85 species were identified, 11 species new to science were described, and 16 other possible new species await further study. More than 20 papers have resulted from the GSMNP tardigrade inventory, making the Smokies the most thoroughly studied area in North America for tardigrades. Several species lists have been published over this 20-year period, but many taxonomic revisions and new identifications have led to significant changes to the list. Biogeographical studies citing species records from earlier studies could yield serious errors. Here we update the species list from the Smokies to accommodate the many recent changes in tardigrade taxonomy, we re-analyze some species in light of delineations of cryptic species groups that have occurred recently via integrative taxonomy, and we provide a table of all synonyms that have been used in previous publications. We also make available, for the first time, the Smokies tardigrade database, complete with all locations, elevations, and substrates.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b4489281b6225046ad8361b0c4c715fTest
https://pubmed.ncbi.nlm.nih.gov/34186981Test

المؤلفون: Ilse Luther, Paul J. Bartels, Daniela Steckler, Katarina Medger, Gerhard van der Horst

المصدر: Animal Reproduction Science. 195:309-320

مصطلحات موضوعية: Male, 0301 basic medicine, zoos, Zoological garden, Zoology, Motility, Morphology (biology), 03 medical and health sciences, 0302 clinical medicine, Endocrinology, Food Animals, Image Processing, Computer-Assisted, Animals, zoos.zoo, 030219 obstetrics & reproductive medicine, Sperm Count, biology, General Medicine, Bottlenose dolphin, biology.organism_classification, Spermatozoa, Sperm, Bottle-Nosed Dolphin, 030104 developmental biology, Sperm Motility, Ultrastructure, Animal Science and Zoology

الوصف: Computer aided sperm analysis systems allow detailed examination of sperm motility and morphology variables, which are important for the understanding of the spermatology of a species and the development of assisted reproductive techniques. Cetacean biology is too complex to study in the wild and data from captive individuals provide an important alternative for the conservation of these charismatic animals. The present study evaluates ejaculate and sperm characteristics, including sperm motility, kinematic variables and quantitative sperm morphology and ultrastructure, of consecutive ejaculates from Atlantic bottlenose dolphins (Tursiops truncatus). Sperm concentrations and total and progressive motilities were greater in the second than the first ejaculate, with all ejaculates being of very high quality (6.9-1127 × 10

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34547244cc8fe613031d3112fa80376eTest
https://doi.org/10.1016Test/j.anireprosci.2018.06.009