scholarly journals An Overview of the Biological Features, Distribution, and Conservation of a Critically Endangered Riverine Catfish, Bagarius bagarius (Hamilton, 1822), in the Natural Waters of Bangladesh

Conservation ◽  
2021 ◽  
Vol 1 (4) ◽  
pp. 350-367
Author(s):  
Shuva Saha ◽  
Shamima Nasren ◽  
Debasish Pandit ◽  
Sohel Mian
Keyword(s):  
Natural Waters ◽  
Critically Endangered ◽  
Conservation Strategy ◽  
Anthropogenic Factors ◽  
Endangered Fish ◽  
Critically Endangered Species ◽  
Fisheries Resources ◽  
The World ◽  
Food Fish ◽  
Specific Conservation

Bagarius bagarius (Hamilton, 1822) is widely distributed in South and Southeast Asian countries, including Bangladesh. This species is economically important as a game and food fish. The abundance of this fish is declining around the world, especially in Bangladesh, due to a variety of meteorological and mostly anthropogenic factors, which is potentially generating concern among the conservationists. Therefore, this species has already been declared a critically endangered species by IUCN Bangladesh. Although there is no specific conservation initiative for B. bagarius in Bangladesh, various measures are there to conserve fisheries resources, which may have an impact on conserving B. bagarius in this country. This study reviews the biology and ecology with its distribution throughout the country as well as the world, threats, conservation measures, and finds out the gaps in research on this fish. Moreover, this review suggests a suitable conservation framework to improve the conservation strategy for this critically endangered fish that can be replicated in other countries for the same purpose.

Jenis-Jenis Ikan Indonesia yang Kritis dan Terancam Punah

2021 ◽  
Vol 10 (1) ◽  
pp. 53-59
Author(s):  
Andri Iskandar ◽  
M Muslim ◽  
Andri Hendriana ◽  
W Wiyoto
Keyword(s):  
Foreign Language ◽  
Fish Species ◽  
Critically Endangered ◽  
Literature Study ◽  
Endangered Fish ◽  
The Public ◽  
Critically Endangered Species ◽  
The Status ◽  
In The Wild ◽  
Rule Out

ABSTRACTIndonesia has a high diversity of fish species. Some fish species are critical and endangered. Information on Indonesian native and endemic fish species needs to be disseminated to the public. Such information is available in various sources and is generally in a foreign language. Therefore, the purpose of this research is to inventory and distribute information about several species of fish native to Indonesian public waters that need special attention because they are endangered and critically endangered. Species of fish, especially species that have been critically endangered, do not rule out turning into extinct in the wild (extinct in the wild). The decline in the status of the above from vulnerable (vulnerable) to endangered (endangered) and critical (critically endangered) or even become extinct in the wild (extinct in the wild) caused by various factors, including the existence of fisheries activities that tend to exploit natural resources without offset by conservation activities and increasing pollution of water conditions. With this information, it is expected to anticipate the extinction of these species. The study was conducted using the literature study method. Based on the search results, there were 22 endangered fish species and 15 critically endangered fish species. The Indonesian government has designated 20 protected fish species. Domestication of endangered and critical species is urgent to do, to prevent the extinction of these species. ABSTRAKIndonesia memiliki keanekaragaman spesies ikan yang tinggi. Beberapa spesies ikan sudah kritis dan terancam punah. Informasi jenis-jenis ikan asli dan endemik Indonesia perlu diserbarluaskan ke masyarakat. Informasi tersebut terdapat diberbagai sumber dan umumnya berbahasa asing. Oleh karena itu, tujuan penelitian ini adalah untuk menginventarisasi dan mendistribusikan informasi tentang beberapa spesies ikan asli penghuni perairan umum Indonesia yang perlu mendapat perhatian khusus karena berstatus terancam punah (endangered) dan kritis (critically endangered). Spesies-spesies ikan tersebut terutama spesies yang sudah berstatus kritis terancam punah, tidak menutup kemungkinan berubah menjadi punah di alam liar (extinct in the wild). Terjadinya penurunan status diatas dari rentan (vulnerable) ke terancam punah (endangered) dan kritis (critically endangered) atau bahkan menjadi punah di alam liar (extinctin the wild) disebabkan oleh berbagai macam faktor, diantaranya adanya kegiatan perikanan yang cenderung mengeksploitasi sumber daya alam tanpa diimbangi dengan kegiatan konservasi serta meningkatnya pencemaran terhadap kondisi perairan. Dengan adanya informasi ini diharapkan dapat melakukan antisipasi pencegahan kepunahan spesies tersebut. Penelitian dilakukan dengan metode studi literatur. Berdasarkan hasil penelusuran, diperoleh 22 spesies ikan yang terancam punah (endangered) dan 15 spesies ikan yang sudah kritis (critically endangered). Pemerintah Indonesia telah menetapkan 20 spesies ikan yang dilindungi. Domestikasi spesies-spesies yang terancam punah dan kritis sudah mendesak untuk dilakukan, untuk mencegah kepunahan spesies tersebut. 

Where have all the sawfishes gone? Perspectives on declines of these Critically Endangered species in Sri Lanka

2021 ◽  
Author(s):  
Akshay Tanna ◽  
Daniel Fernando ◽  
Ramajeyam Gobiraj ◽  
Buddhi M. Pathirana ◽  
Sahan Thilakaratna ◽  
...  
Keyword(s):  
Sri Lanka ◽  
Endangered Species ◽  
Critically Endangered ◽  
Critically Endangered Species

scholarly journals The Oral Bacterial Community in Melanophryniscus admirabilis (Admirable Red-Belly Toads): Implications for Conservation

2021 ◽  
Vol 9 (2) ◽  
pp. 220
Author(s):  
Michele Bertoni Mann ◽  
Janira Prichula ◽  
Ícaro Maia Santos de Castro ◽  
Juliana Mello Severo ◽  
Michelle Abadie ◽  
...  
Keyword(s):  
Endangered Species ◽  
Bacterial Community ◽  
High Throughput Sequencing ◽  
Dietary Diversity ◽  
Natural Habitat ◽  
Critically Endangered ◽  
Personal Genome ◽  
Oral Microbiota ◽  
Critically Endangered Species ◽  
Anthropogenic Environment

Melanophryniscus admirabilis (admirable red-belly toad) is a microendemic and critically endangered species found exclusively along 700 m of the Forqueta River, in a fragment of the Atlantic Forest of southern Brazil. One of the greatest concerns regarding the conservation of this species is the extensive use of pesticides in areas surrounding their natural habitat. In recent years, the adaptation and persistence of animal species in human-impacted environments have been associated with microbiota. Therefore, the present study aimed to characterize the oral bacterial community of wild M. admirabilis and to address the question of how this community might contribute to this toad’s adaptation in the anthropogenic environment as well as its general metabolic capabilities. A total of 11 oral samples collected from wild M. admirabilis were characterized and analyzed via high-throughput sequencing. Fragments of the 16S rRNA variable region 4 (V4) were amplified, and sequencing was conducted using an Ion Personal Genome Machine (PGM) System with 316 chips. A total of 181,350 sequences were obtained, resulting in 16 phyla, 34 classes, 39 orders, and 77 families. Proteobacteria dominated (53%) the oral microbiota of toads, followed by Firmicutes (18%), Bacteroidetes (17%), and Actinobacteria (5%). No significant differences in microbial community profile from among the samples were reported, which suggests that the low dietary diversity observed in this population may directly influence the bacterial composition. Inferences of microbiome function were performed using PICRUSt2 software. Important pathways (e.g., xenobiotic degradation pathways for pesticides and aromatic phenolic compounds) were detected, which suggests that the bacterial communities may serve important roles in M. admirabilis health and survival in the anthropogenic environment. Overall, our results have important implications for the conservation and management of this microendemic and critically endangered species.

scholarly journals Testing reintroduction as a conservation strategy for the critically endangered Chinese alligator: Movements and home range of released captive individuals

2011 ◽  
Vol 56 (24) ◽  
pp. 2586-2593 ◽  
Author(s):  
ZhengHuan Wang ◽  
Hong Yao ◽  
YouZhong Ding ◽  
John Thorbjarnarson ◽  
XiaoMing Wang
Keyword(s):  
Home Range ◽  
Critically Endangered ◽  
Conservation Strategy ◽  
Chinese Alligator

scholarly journals Monitoring invasive mammalian predator populations sharing habitat with the Critically Endangered Puerto Rican parrot Amazona vittata

Oryx ◽  
2005 ◽  
Vol 40 (1) ◽  
pp. 95-102 ◽  
Author(s):  
Richard Engeman ◽  
Desley Whisson ◽  
Jessica Quinn ◽  
Felipe Cano ◽  
Pedro Quiñones ◽  
...  
Keyword(s):  
Puerto Rican ◽  
Habitat Type ◽  
Critically Endangered ◽  
Mammal Species ◽  
Forest Sites ◽  
The World ◽  
Mammalian Predators ◽  
In The Wild ◽  
Amazona Vittata ◽  
Black Rats

Critically Endangered Puerto Rican parrots Amazona vittata are one of the rarest birds in the world. Several exotic mammal species capable of preying on Puerto Rican parrots cohabit the Caribbean National Forest with the only wild population of these parrots. We used tracking plates, monitoring blocks and trapping to index black rats, small Indian mongooses and feral cats in parrot habitat and in public-use areas in the same habitat type. We had high trap success for black rats at all sites (42% of all sites combined), among the highest reported in the world. Rat response to monitoring (nontoxic bait) blocks was universally high, regardless of ground or tree placement. Mongooses were present at all sites, with a greater proportion of plates tracked within the forest than at public-use sites. Cats were present at all forest sites and one of the public-use sites. Presence of the three species did not appear to be linked to human disturbance. Because only 30–40 Puerto Rican parrots survive in the wild, with as few as three pairs nesting in 2002, we concluded that the abundance and pervasiveness of exotic mammalian predators poses a greater threat to the parrots than has been generally acknowledged. This is evidenced by mammalian predation during recent parrot breeding seasons, including six fledglings taken by mongooses and one nest failure from rats during 2000–2003.

scholarly journals High survival rate of a critically endangered species, the Azores Bullfinch Pyrrhula murina, as a contribution to population recovery

2010 ◽  
Vol 151 (3) ◽  
pp. 627-636 ◽  
Author(s):  
David Monticelli ◽  
Ricardo Ceia ◽  
Ruben Heleno ◽  
Hugo Laborda ◽  
Sergio Timóteo ◽  
...  
Keyword(s):  
Survival Rate ◽  
Endangered Species ◽  
Critically Endangered ◽  
High Survival ◽  
Population Recovery ◽  
High Survival Rate ◽  
Critically Endangered Species

scholarly journals Effects of Lead on Ultrastructure of Isoetes sinensis Palmer (Isoetaceae), a Critically Endangered Species in China

PLoS ONE ◽  
2015 ◽  
Vol 10 (9) ◽  
pp. e0139231 ◽  
Author(s):  
Guohua Ding ◽  
Chunye Li ◽  
Xu Han ◽  
Chunyu Chi ◽  
Dawei Zhang ◽  
...  
Keyword(s):  
Endangered Species ◽  
Critically Endangered ◽  
Critically Endangered Species

Genomic characteristics of critically endangered Chimonobambusa hirtinoda C.S. Chao & K.M. Lan

2021 ◽  
Vol 50 (1) ◽  
pp. 69-77
Author(s):  
Tengfei Shen ◽  
Youmiao Zheng ◽  
Zimou Sun ◽  
Meng Xu
Keyword(s):  
Endangered Species ◽  
Frequency Analysis ◽  
Natural Habitat ◽  
Gc Content ◽  
Critically Endangered ◽  
Critically Endangered Species ◽  
Phylogenetic Studies ◽  
Ssr Loci ◽  
Ecological Conservation ◽  
Repeat Rate

With its unique square-shaped culm, Chimonobambusa hirtinoda C.S. Chao & K.M. Lan is a critically endangered species, and its natural habitat is solely restricted to Doupeng Mountain in Guizhou, China. Two small-insert libraries from C. hirtinoda were constructed and sequenced. Approximately 127.83 Gb of highquality reads were generated and assembled into 9,320,997 contigs with a N50 length of 213bp, thereby producing 8,867,344 scaffolds with total length of 2.01 Gb. An estimated genome size of C. hirtinode was 2.86 Gb on the basis of k-mer frequency analysis, with the GC content of 45.40%. The repeat rate and heterozygous ratio were 74.11 and 1.48% in C. hirtinoda genome, respectively. Finally, 65,398 SSR loci were identified in the assembled contigs, including 58.66% tri-nucleotide, 27.42% di-nucleotide, 7.94% tetranucleotide, 3.67% penta-nucleotide, and 2.31% hexa-nucleotide. Results of this study are useful not only for ecological conservation of C. hirtinoda, but also for phylogenetic studies.

Environmental Sustainability in Nigeria: The “Awareness” Imperative

2003 ◽  
Vol 32 (1-2) ◽  
pp. 41-52
Author(s):  
Foluke Ogunleye
Keyword(s):  
Sustainable Development ◽  
Environmental Sustainability ◽  
Developing Nations ◽  
Conservation Strategy ◽  
Awareness Campaigns ◽  
World Conservation ◽  
The World ◽  
Education And Awareness ◽  
Stockholm Conference ◽  
Nations Environment

The practice of treating the environment with disdain has gradually become unfashionable. Yet in many developing nations, Nigeria among them, environmental education and awareness campaigns remain something regarded as unnecessary. According to Berry (1993: 158):The term “sustainable development” has become a shibboleth of governments and industries, to present a respectful image to a society that is becoming even more strident in its concern for the environment. It is a concept that was projected onto the world by the Stockholm Conference of 1972, and has been carried ever since by the United Nations Environment Programs (UNEP), the World Conservation Union (IUCN), and the World Wildlife Fund for nature (WWF) in their world conservation strategy. It has the ring of truth and worldwide acceptance, but it is poorly understood by those who use it.

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