scholarly journals Conservation possibilities of Isophya costata (Orthoptera: Tettigoniidae: Phaneropterinae) based on frequency, population size, and habitats

2021 ◽  
Vol 30 (1) ◽  
pp. 35-41
Author(s):  
Zoltán Kenyeres ◽  
Norbert Bauer
Keyword(s):  
Data Collection ◽  
Population Size ◽  
Threatened Species ◽  
Natura 2000 ◽  
Iucn Red List ◽  
Red List ◽  
Dicotyledonous Plants ◽  
Species Area ◽  
Different Origin ◽  
Bush Cricket

Isophya costata Brunner von Wattenwyl, 1878, commonly called the Keeled Plump Bush-cricket, is an endemic Natura 2000 species in the Carpathian Basin and is included in the IUCN Red List of Threatened species. We used extensive data collection from Hungary retrieved between 2004 and 2019 from 700 sampling sites spread over an area of 12,700 km2 to examine the occurrence of the species in different regions in grasslands of similar structure but different origin, naturalness, and character. The results confirmed that I. costata currently occurs with the highest number of populations and highest density in regularly mowed, mesophilic hayfields rich in dicotyledonous plants (Arrhenatheretalia). The species also appears in smaller numbers in grasslands adjacent to hayfields, such as wetland meadows (Molinion coeruleae), marsh meadows (Deschampsion caespitosae, Alopecurenion pratensis), and edge habitats dominated by herbaceous plants. However, the results show that the extension of these habitats has a negatively significant correlation with both the occurrence of the species and its density. Isophya costata occurs in steppe meadows much less frequently than in mesophilic hayfields. The species is endemic to the Pannonian Steppe, and the key to their conservation is by maintaining stocks of hayfields in the species’ area of distribution. According to this study, overseeding of mowed grasslands leads to the decline of the species. To preserve I. costata, it is necessary to eliminate trampling in its areas of occurrence (prohibition of grazing) and encourage late-season mowing adapted to the phenology of the species (not as early as mid-July) or, if this is not feasible, mosaic-type treatment leaving unmown patches (e.g., 1/3 of the plot).

scholarly journals Abundance, distribution and conservation of Rio Branco Antbird Cercomacra carbonaria and Hoary-throated Spinetail Synallaxis kollari

2007 ◽  
Vol 17 (3) ◽  
pp. 245-257 ◽  
Author(s):  
Mariana M. Vale ◽  
J. Bruce Bell ◽  
Maria Alice S. Alves ◽  
Stuart L. Pimm
Keyword(s):  
Population Density ◽  
Population Size ◽  
Threatened Species ◽  
Total Population ◽  
Local Population ◽  
Iucn Red List ◽  
Red List ◽  
Conservation Units ◽  
Total Population Size ◽  
Species Lists

AbstractCercomacra carbonaria and Synallaxis kollari are passerine birds endemic to the gallery forests of Roraima state in northernmost Brazil and adjacent Guyana. The IUCN Red List of Threatened Species lists both as Vulnerable but they have been removed from Brazil's list of threatened species because of data deficiency. They are poorly known, reflecting both Roraima state's distance from Brazil's main population centres and the inaccessibility of their habitat. In 2004 and 2005, we conducted bird surveys along the major rivers that provided previous sightings, and expanded records from only a handful to several dozens. We found C. carbonaria at 29% of the points surveyed, and estimated its local population density at approximately 80 individuals km−2 and total population size to exceed 15,000 individuals. The species has 723 km2 of available habitat, 8% of which is inside conservation units. We found S. kollari at 44% of the points surveyed, and estimated its local population density as approximately 60 individuals km−2, with an estimated total population size exceeding 5,000 individuals. It has 206 km2 of available habitat, none of which is inside conservation units. We recommend that C. carbonaria be down-listed on the IUCN Red List to the Near Threatened category, and that S. kollari be listed as Endangered. Both species live in areas vulnerable to habitat loss. We also recommend that both species re-enter the Brazilian list of threatened species and highlight the importance of indigenous reserves to their conservation.ResumoCercomacra carbonaria e Synallaxis kollari são aves passeriformes das matas de galeria do Estado de Roraima em sua parte mais ao norte do Brasil e da Guiana adjacente. Ambas as espécies são catalogadas como “Vulneráveis” pela lista vermelha de espécies ameaçadas da IUCN, mas foram excluídas da lista de espécies ameaçadas do Brasil devido è insuficiência de dados. Estas espécies são pouco conhecidas, refletindo tanto a distância do Estado de Roraima dos principais centros urbanos quanto a inacessibilidade do seu hábitat. Em 2004 e 2005, realizamos censos de aves anteriormente avistadas ao longo de rios maiores, aumentando assim os registros de apenas alguns poucos números para diversas dezenas. Encontramos C. carbonaria em 29% dos pontos amostrados e estimamos sua densidade local em ∼80 indivíduos km−2 e o tamanho populacional total em mais de 15.000 indivíduos. A espécie possui 723 km2 de habitat disponível, 8% do qual está incluído em unidades de conservação. Encontramos S. kollari em 44% dos pontos amostrados e estimamos sua densidade populacional local em ∼60 indivíduos km−2, com uma estimativa de tamanho populacional total em mais de 5,000 indivíduos. Esta espécie tem 206 km2 de habitat disponível, nenhum dos quais incluído em unidades de conservação. Recomendamos que C. carbonaria seja rebaixada para a categoria ‘Quase Ameaçada’ e S. kollari categorizada como ‘Ameaçada’ na lista vermelha da IUCN. Ambas as espécies vivem em áreas vulneráveis em relação è perda de seu hábitat. Recomendamos, também, que ambas as espécies sejam re-incluídas na lista de espécies ameaçadas do Brasil, destacando a importância das reservas indígenas para a sua conservação.

scholarly journals Giant otter Pteronura brasiliensis density and abundance in Llanos Orientales de Colombia in the Orinoco basin

Oryx ◽  
2020 ◽  
pp. 1-4
Author(s):  
Germán Garrote ◽  
Beyker Castañeda ◽  
Jose Manuel Escobar ◽  
Laura Pérez ◽  
Brayan Marín ◽  
...  
Keyword(s):  
South America ◽  
Population Size ◽  
20Th Century ◽  
Conservation Status ◽  
Species Conservation ◽  
Iucn Red List ◽  
Red List ◽  
Recreational Fishing ◽  
Pteronura Brasiliensis ◽  
Direct Counts

Abstract The giant otter Pteronura brasiliensis, categorized as Endangered on the IUCN Red List, was once widely distributed throughout South America. By the middle of the 20th century the giant otter had become locally extinct along the main rivers of the Orinoco basin. Although some populations seem to have recovered, the paucity of information available does not permit a full evaluation of the species' conservation status. The objective of this study was to estimate the abundance and density of the giant otter population along the Orinoco river in the municipality of Puerto Carreño, Vichada, Colombia, where there is important commercial and recreational fishing. Thirty-nine linear km were surveyed, repeatedly, with a total of 315 km of surveys. Population size was estimated by direct counts of individuals. All individuals detected were photographed and identified individually from their throat pelage patterns. In total, 30 otters were identified, giving a minimum density of 0.77 individuals per km, one of the highest reported for the species in Colombia. Given the high density in this well-developed area, our results highlight the importance of this population for the conservation of the species.

scholarly journals Conservation Status of Marine Biodiversity in Oceania: An Analysis of Marine Species on the IUCN Red List of Threatened Species

2011 ◽  
Vol 2011 ◽  
pp. 1-14 ◽  
Author(s):  
Beth A. Polidoro ◽  
Cristiane T. Elfes ◽  
Jonnell C. Sanciangco ◽  
Helen Pippard ◽  
Kent E. Carpenter
Keyword(s):  
Threatened Species ◽  
Environmental Changes ◽  
Extinction Risk ◽  
Conservation Status ◽  
Marine Species ◽  
Iucn Red List ◽  
Red List ◽  
Marine Biodiversity ◽  
Conservation Priorities ◽  
Conservation Action

Given the economic and cultural dependence on the marine environment in Oceania and a rapidly expanding human population, many marine species populations are in decline and may be vulnerable to extinction from a number of local and regional threats. IUCN Red List assessments, a widely used system for quantifying threats to species and assessing species extinction risk, have been completed for 1190 marine species in Oceania to date, including all known species of corals, mangroves, seagrasses, sea snakes, marine mammals, sea birds, sea turtles, sharks, and rays present in Oceania, plus all species in five important perciform fish groups. Many of the species in these groups are threatened by the modification or destruction of coastal habitats, overfishing from direct or indirect exploitation, pollution, and other ecological or environmental changes associated with climate change. Spatial analyses of threatened species highlight priority areas for both site- and species-specific conservation action. Although increased knowledge and use of newly available IUCN Red List assessments for marine species can greatly improve conservation priorities for marine species in Oceania, many important fish groups are still in urgent need of assessment.

scholarly journals Reintroduction of illegally extracted Melocactus violaceus (Cactaceae) in Brazil

Oryx ◽  
2020 ◽  
pp. 1-4
Author(s):  
Haissa de Abreu Caitano ◽  
Valquíria Ferreira Dutra ◽  
Rodrigo Theófilo Valadares ◽  
Luana Silva Braucks Calazans
Keyword(s):  
Environmental Monitoring ◽  
Threatened Species ◽  
Natural Habitat ◽  
Iucn Red List ◽  
Red List ◽  
Natural Area ◽  
Conservation Units ◽  
Threatened Plant ◽  
Plant Families ◽  
Espirito Santo

Abstract Cactaceae is one of the most threatened plant families, in part as a result of the illegal extraction of plants for ornamental use. However, reports of the seizure and reintroduction of cacti are scarce and do not include species of Melocactus, the genus of Cactaceae in Brazil that has the highest number of threatened species. The coroa-de-frade Melocactus violaceus is endemic to Brazil and categorized as Vulnerable on the IUCN Red List. We report the seizure of 37 individuals of coroa-de-frade extracted illegally from their natural habitat, the results of their reintroduction to Paulo César Vinha State Park, in Espírito Santo state, Brazil, and provide information for environmental monitoring agencies regarding how to proceed in seizure cases, with the goal of minimizing the impacts of this illegal practice on the species. After seizure, 25 individuals were cultivated in a greenhouse and 12 were reintroduced in restinga, the natural area of occurrence of the species. After 6 months, survival was 76% for those individuals cultivated in the greenhouse and 84% for those planted in restinga, showing that rapid reintroduction of species with ornamental appeal, preferentially in their natural habitat, can reduce the impacts of illegal extraction. This reintroduction protocol can be used by managers of conservation units, contributing to the maintenance of threatened cactus species in their natural habitat.

A new grass frog with rupicolous tadpoles from northern Zambia (Anura: Ptychadenidae)

Zootaxa ◽  
2018 ◽  
Vol 4462 (3) ◽  
pp. 349
Author(s):  
ALAN CHANNING ◽  
FRANK WILLEMS
Keyword(s):  
New Species ◽  
Population Size ◽  
Dna Sequences ◽  
Iucn Red List ◽  
Red List ◽  
Advertisement Call ◽  
Limited Extent ◽  
Iucn Red List Criteria ◽  
A New Species ◽  
Near Threatened

We describe a new species of Ptychadena from Mutinondo Wilderness in northern Zambia. It has rupicolous tadpoles that develop in a film of water. The species is distinguished on morphology, advertisement call and DNA sequences from other grass frogs and was found to be most closely related to P. broadleyi. It has no contrasting longitudinal bands on the posterior thigh, the foot is longer than half SVL, it has no light triangle on the snout, three phalanges of the fourth toe free of web and the snout has no skin folds. The species should be considered Near Threatened in terms of the IUCN Red List criteria given its limited extent of occurrence and population size. 

scholarly journals The IUCN Red List of Threatened Species: an assessment of coral reef fishes in the US Pacific Islands

Coral Reefs ◽  
2013 ◽  
Vol 32 (3) ◽  
pp. 637-650 ◽  
Author(s):  
B. J. Zgliczynski ◽  
I. D. Williams ◽  
R. E. Schroeder ◽  
M. O. Nadon ◽  
B. L. Richards ◽  
...  
Keyword(s):  
Coral Reef ◽  
Threatened Species ◽  
Pacific Islands ◽  
Reef Fishes ◽  
Iucn Red List ◽  
Red List ◽  
Coral Reef Fishes ◽  
The Us

scholarly journals The Dynamics of Changes in the Amphibian (Amphibia) Population Size in the Masurian Landscape Park Monitoring Results of Spring Migration Monitoring from the Years 2011–2019

2020 ◽  
Vol 31 (4) ◽  
pp. 8-16
Author(s):  
Wojciech Gotkiewicz ◽  
Krzysztof Wittbrodt ◽  
Ewa Dragańska
Keyword(s):  
Population Size ◽  
Biological Diversity ◽  
Iucn Red List ◽  
Red List ◽  
Spring Migration ◽  
Clear Correlation ◽  
Population Changes ◽  
Amphibian Species ◽  
Research Activities ◽  
Dynamics Of Population

Abstract The study presents the results of nine-year-long monitoring of the population size of amphibians (Amphibia) as one of the indicator communities used to assess the biological diversity level. The study was conducted in the Masurian Landscape Park located in Warmińsko-MazurskieVoivodeship. The obtained results demonstrated that 13 out of the 18 domestic amphibian species occurred in the area selected for research activities, including the species entered in the IUCN Red List. No clear correlation was found between the dynamics of population changes and the environmental, primarily climatic, determinants.

scholarly journals Additional information on the threatened Cryptocoryne cognata Schott (Araceae): A need for reassessment of the IUCN Red List status

2015 ◽  
Vol 7 (15) ◽  
pp. 8302
Author(s):  
Sidanand V. Kambhar ◽  
Mahendra R. Bhise ◽  
Mayur M. Naik ◽  
Abhijeet L. Parab ◽  
Kamlakar H. Patil ◽  
...  
Keyword(s):  
Threatened Species ◽  
Plant Conservation ◽  
Iucn Red List ◽  
Red List ◽  
Global Strategy ◽  
Ecological Preferences ◽  
Additional Information

<p><em>Cryptocoryne cognata</em> Schott is a threatened species distributed in the entire Konkan stretch covering Goa, Karnataka and Maharashtra. It was rediscovered in 1990 after not being documented for one and half centuries. The data concerning its morphology, distribution and ecological preferences are presented in this paper in order to contribute to the Global Strategy for Plant Conservation (GSPC) goals and to assist taxonomists in assessing and protecting this species from extinction in future.  </p><div> </div>

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