scholarly journals Planning tiger recovery: Understanding intraspecific variation for effective conservation

2015 ◽  
Vol 1 (5) ◽  
pp. e1400175 ◽  
Author(s):  
Andreas Wilting ◽  
Alexandre Courtiol ◽  
Per Christiansen ◽  
Jürgen Niedballa ◽  
Anne K. Scharf ◽  
...  
Keyword(s):  
Captive Breeding ◽  
Conservation Management ◽  
Scientific Evidence ◽  
Population Decline ◽  
Ex Situ ◽  
Panthera Tigris ◽  
Multiple Trait ◽  
Data Set ◽  
Management Units ◽  
Tiger Conservation

Although significantly more money is spent on the conservation of tigers than on any other threatened species, today only 3200 to 3600 tigers roam the forests of Asia, occupying only 7% of their historical range. Despite the global significance of and interest in tiger conservation, global approaches to plan tiger recovery are partly impeded by the lack of a consensus on the number of tiger subspecies or management units, because a comprehensive analysis of tiger variation is lacking. We analyzed variation among all nine putative tiger subspecies, using extensive data sets of several traits [morphological (craniodental and pelage), ecological, molecular]. Our analyses revealed little variation and large overlaps in each trait among putative subspecies, and molecular data showed extremely low diversity because of a severe Late Pleistocene population decline. Our results support recognition of only two subspecies: the Sunda tiger,Panthera tigris sondaica,and the continental tiger,Panthera tigris tigris, which consists of two (northern and southern) management units. Conservation management programs, such as captive breeding, reintroduction initiatives, or trans-boundary projects, rely on a durable, consistent characterization of subspecies as taxonomic units, defined by robust multiple lines of scientific evidence rather than single traits or ad hoc descriptions of one or few specimens. Our multiple-trait data set supports a fundamental rethinking of the conventional tiger taxonomy paradigm, which will have profound implications for the management of in situ and ex situ tiger populations and boost conservation efforts by facilitating a pragmatic approach to tiger conservation management worldwide.

scholarly journals Panthera tigris jacksoni Population Crash and Impending Extinction due to Environmental Perturbation and Human-Wildlife Conflict

Animals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1032
Author(s):  
Dennis Choon Yung Ten ◽  
Rohana Jani ◽  
Noor Hashida Hashim ◽  
Salman Saaban ◽  
Abdul Kadir Abu Hashim ◽  
...  
Keyword(s):  
Population Decline ◽  
Management Plan ◽  
Peninsular Malaysia ◽  
Panthera Tigris ◽  
Canine Distemper ◽  
Environmental Perturbation ◽  
Population Crash ◽  
Tiger Conservation ◽  
Near Future ◽  
Human Wildlife Conflict

The critically endangered Malayan tiger (Panthera tigris jacksoni), with an estimated population of less than 200 individuals left in isolated rainforest habitats in Malaysia, is in an intermediate population crash leading to extinction in the next decade. The population has decreased significantly by illegal poaching, environmental perturbation, roadkill, and being captured during human–wildlife conflicts. Forty-five or more individuals were extracted from the wild (four animals captured due to conflict, one death due to canine distemper, one roadkilled, and 39 poached) in the 12 years between 2008–2019. The Malayan tigers are the first wildlife species to test positive for COVID-19 and are subject to the Canine Distemper Virus. These anthropogenic disturbances (poaching and human–tiger conflict) and environmental perturbation (decreasing habitat coverage and quality) have long been identified as impending extinction factors. Roadkill and infectious diseases have emerged recently as new confounding factors threatening Malayan tiger extinction in the near future. Peninsular Malaysia has an existing Malayan tiger conservation management plan; however, to enhance the protection and conservation of Malayan tigers from potential extinction, the authority should reassess the existing legislation, regulation, and management plan and realign them to prevent further population decline, and to better enable preparedness and readiness for the ongoing pandemic and future threats.

scholarly journals KONSERVASI EX-SITU HARIMAU SUMATERA (Panthera tigris sumatrae) DI TMR JAKARTA

2019 ◽  
Vol 9 (1) ◽  
pp. 29
Author(s):  
Yultisman Yultisman ◽  
Mia Azizah ◽  
Supriono Eko Wardoyo
Keyword(s):  
Endemic Species ◽  
Ex Situ Conservation ◽  
Descriptive Analysis ◽  
Conservation Strategy ◽  
Ex Situ ◽  
Panthera Tigris ◽  
Conservation Area ◽  
Tiger Conservation

Ex-situ conservation of Sumatran tigers (Panthera tigris sumatrae) in Ragunan wildlife park, Jakarta                 Sumatran tiger (Panthera tigris sumatrae) is one of the endemic species of Indonesia, which until now still live on the island of Sumatra. According to the International Conservation Agency, the existence of the animal is approaching extinction. Taman Marga Satwa Ragunan is one of Sumatran tiger conservation institution. The purpose of the research was to know the breeding of Sumatran tiger in Ragunan Wildlife Park conservation area, to know the proper conservation strategy for Sumatran tiger and to know Sumatran tiger activity ex-situ. The research was conducted at the Sumatran Tiger in Taman Marga Satwa Ragunan. Data were analyzed by descriptive analysis. Taman Marga Satwa Ragunan has made a proper effort in tiger conservation, this is marked by an increase in the Sumatran Tiger population.Keywords: Sumatran Tiger, Conservation, Ragunan Wildlife Park ABSTRAK Harimau sumatera (Panthera tigris sumatrae) merupakan salah satu satwa endemik Indonesia, yang hingga saat ini masih hidup di pulau Sumatera. Menurut lembaga konservasi Internasional keberadaan satwa ini sudah mendekati kepunahan.Taman Marga Satwa Ragunan adalah salah satu lembaga konservasi Harimau Sumatera.Tujuan penelitian ini adalah mengetahui perkembangbiakan harimau sumatera dikawasan konservasi TMR, mengetahui strategi konservasi yang tepat untuk harimau sumatera dan mengetahui aktivitas harimau sumatera secara ex-situ.Penelitian ini di lakukan di kandang Harimau Sumatera di Taman Marga Satwa Ragunan, hasil dianalisis dengan analisis deskriptif.Taman Margasatawa Ragunan merupakan tempat konservasi yang cocok bagi Harimau Sumatera, ini ditandai dengan adanya peningkatan populasi dari awal tahun pendirian TMR (Tahun 1980) sampai dengan saat sekarang iniKata Kunci : Harimau Sumatera, Konservasi, TMR

scholarly journals Reproductive Anatomy of Chondrichthyans: Notes on Specimen Handling and Sperm Extraction. II. Sharks and Chimaeras

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2191
Author(s):  
Pablo García-Salinas ◽  
Victor Gallego ◽  
Juan F. Asturiano
Keyword(s):  
Artificial Insemination ◽  
Captive Breeding ◽  
Ex Situ ◽  
Specimen Handling ◽  
Viable Sperm ◽  
Abdominal Massage ◽  
Reproductive Anatomy ◽  
Conservation Projects ◽  
Breeding Techniques

The chondrichthyan fishes, which comprise sharks, rays, and chimaeras, are one of the most threatened groups of vertebrates on the planet. Given this situation, an additional strategy for the protection of these species could be the ex situ conservation projects developed in public aquaria and research centers. Nevertheless, to increase sustainability and to develop properly in situ reintroduction strategies, captive breeding techniques, such as sperm extraction and artificial insemination, should be developed. These techniques are commonly used in other threatened species and could be also used in chondrichthyans. However, the different reproductive morphologies found in this group can complicate both processes. Therefore, a comparison of the reproductive anatomy of eight distinct chondrichthyans, with an emphasis on those important differences when performing sperm extraction or artificial insemination, is carried out herein. Sharks and chimaeras belonging to the Scyliorhinidae, Carcharhinidae, Centrophoridae, Etmopteridae, Hexanchidae, and Chimaeridae families were obtained from commercial fisheries, public aquaria, and stranding events. In addition, the process of obtaining viable sperm samples through cannulation, abdominal massage, and oviducal gland extraction is described in detail for both living and dead animals.

scholarly journals Hue and cry for Fritillaria cirrhosa D.Don, a threatened medicinal plant in the Western Himalaya

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Manisha Mathela ◽  
Amit Kumar ◽  
Monika Sharma ◽  
Gurinderjit Singh Goraya
Keyword(s):  
Medicinal Plant ◽  
Population Decline ◽  
Plant Conservation ◽  
Western Himalaya ◽  
Ex Situ ◽  
Conservation Strategies ◽  
Market Demand ◽  
Wild Populations ◽  
Threatened Medicinal Plant ◽  
Fritillaria Cirrhosa

AbstractThe unique Himalayan ecosystems are repositories to the wild populations of diverse flora and fauna. The high value medicinal and aromatic plant species (MAPs) are an example of the same. Since time immemorial, these MAPs have been traditionally used by the local inhabitants and have eventually developed a high market value all over the world. Increasing market demand engenders over-extraction of species, unsustainable collection further catalyses decline in wild populations. The current communication raises high conservation concern on the rapid population decline of Fritillaria cirrhosa D.Don in the Western Himalaya. Harvested and traded with a new trade name i.e., ‘Jangli lehsun’ probably to disguise common Allium species, the species is facing tremendous decline in wild populations due to its illegal harvesting and trade in Himachal Pradesh. Further, F. cirrhosa faces threat due to unorganized, over-extraction, unsustainable and premature harvesting of the bulbs, coupled with illegal hidden markets functioning parallelly. Considering that this valuable species is under multiple threats being a medicinally important plant, priority should be given for its conservation through in-situ such as identification of medicinal plant conservation areas and ex-situ methods for its propagation and multiplication. Further, to ensure the long-term conservation of Fritillaria cirrhosa, prioritized conservation strategies such as strengthening of the Biodiversity Management Committees, capacity building through awareness programs for the key stakeholders and sustainable harvesting would be the practical solution.

scholarly journals First Captive Breeding Program for the Endangered Pyrenean Sculpin (Cottus hispaniolensis Bacescu-Master, 1964)

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2986
Author(s):  
Joan Manubens ◽  
Oriol Comas ◽  
Núria Valls ◽  
Lluís Benejam
Keyword(s):  
Captive Breeding ◽  
Ex Situ Conservation ◽  
Breeding Program ◽  
Ex Situ ◽  
Major Influence ◽  
Freshwater Species ◽  
Non Profit ◽  
Captive Breeding Program ◽  
Critical Phases ◽  
Conservation Plans

The strong decline of freshwater fish species in Europe implies that further ex-situ conservation plans should be implemented in the near future. The present study reflects our experience with the Pyrenean sculpin (Cottus hispaniolensis Bacescu-Mester, 1964)—a small cottid endemic to the Hispano-French Garona River basin. In recent years, the Spanish Pyrenean sculpin population has reached a limit situation. Because of that, the non-profit association ADEFFA—with support from the public administration—started the first captive breeding program for this species in 2006. Fourteen years later, this study presents the results and evaluates the different steps of the program, with the aim of discussing and improving the ex-situ conservation plans for this and other cold freshwater species. There is a description and a comparison between six consecutive phases during the captive breeding process: nesting behaviour, courtship, egg fixation, parental care (incubation), hatching and survival during juvenile development. The purposes of this project are to: (1) identify the most determining phases for a successful captive breeding; (2) identify the factors that had a major influence to the success of the critical phases; and (3) increase the number of the offspring. This study is based on thirty-three wild individuals collected from Garona River (Val d’Aran, Spanish Pyrenees). During the program, twelve couples spawned in captive conditions, with around 2300 eggs laid. Eight couples bred successfully, with 751 hatched individuals and 608 juveniles reared. The analysis of each step of the captive breeding does not reveal significant differences between phases, so it can be concluded that they are all critical at the same level. In the literature, similar study-cases of captive breeding programs identify incubation and survival phases as the most critical. Consequently, the management made for this project has probably allowed to overcome in part the main impediments described in other similar programs.

scholarly journals The vegetation types and management units of Goedverwacht farm in the mixed bushveld of the Northern Province, South Africa

Koedoe ◽  
1997 ◽  
Vol 40 (2) ◽  
Author(s):  
L. Breebaart ◽  
M. Deutschlander
Keyword(s):  
Plant Communities ◽  
Correspondence Analysis ◽  
Canonical Correspondence Analysis ◽  
Environmental Gradient ◽  
Detrended Correspondence Analysis ◽  
Northern Province ◽  
Computer Programme ◽  
Data Set ◽  
Management Units ◽  
Floristic Data

An analysis of the vegetation of Goedverwacht farm in the mixed bushveld of the Northern Province is presented. Releves were compiled in 33 stratified random sample plots. Eight distinct plant communities were identified by means ofBraun-Blanquet pro-cedures. Detrended correspondence analysis (DCA) was applied to the floristic data set using the computer programme DECORANA (Detrended Correspondence Analysis) to determine a probable environmental gradient and to facilitate in the identification of management units. The computer programme CANOCO (Canonical Correspondence Analysis) was used to apply canonical correspondence analysis (CCA) to the floristic data set. Two management units were determined by means of vegetation ordinations and soil data. A classification, description and ecological interpretation of the plant communities as well as a description of the management units are presented.

scholarly journals The decline and conservation management of the threatened endemic palms of the Mascarene Islands

Oryx ◽  
2002 ◽  
Vol 36 (1) ◽  
pp. 56-65 ◽  
Author(s):  
Mike Maunder ◽  
Wayne Page ◽  
John Mauremootoo ◽  
Richard Payendee ◽  
Yousoof Mungroo ◽  
...  
Keyword(s):  
Large Scale ◽  
Conservation Management ◽  
Conservation Status ◽  
Iucn Red List ◽  
Ex Situ ◽  
Population Fragmentation ◽  
Wild Populations ◽  
Mascarene Islands

Abstract The conservation status of the five genera and 11 species of palm endemic to the Mascarene Islands (Mauritius, La Réunion and Rodriques) are reviewed. All species are threatened with extinction; nine taxa are classified as Critically Endangered and four as Endangered on the 2000 IUCN Red List. Two taxa survive as single wild specimens (Hyophorbe amaricaulis and Dictyosperma album var. conjugatum); an additional seven taxa have wild populations of 100 or fewer. Although the historical phase of large-scale forest clearance has passed, the remaining palm populations in the Mascarenes are under threat from the effects of population fragmentation, invasive plants and animals, and high levels of seed predation that prevent natural regeneration. The advantages of in situ management for the recovery of these palm populations are discussed. Without a long-term conservation programme, utilising both in situ and ex situ management, extinction of wild populations will occur.

scholarly journals A systematic review of biodiversity and demographic change: A misinterpreted relationship?

AMBIO ◽  
2019 ◽  
Vol 49 (7) ◽  
pp. 1297-1312 ◽  
Author(s):  
Marion Mehring ◽  
Nicolai Mehlhaus ◽  
Edward Ott ◽  
Diana Hummel
Keyword(s):  
Systematic Review ◽  
Demographic Change ◽  
Human Activities ◽  
Scientific Evidence ◽  
Population Decline ◽  
Functional Relation ◽  
Context Dependency ◽  
Long Term Effects ◽  
Complex Relation ◽  
Demographic Processes

AbstractDemographic change is supposed to be the most important indirect driver for changing biodiversity. In this article, a systematic review of 148 studies was conducted to examine the scientific evidence for this relationship and to identify potential gaps in research. We explored the spatial distribution of studies, the categories addressed with respect to biodiversity and demographic change, and the ways in which their relationships were conceptualised (spatially and temporally) and valued. The majority of studies were carried out in Africa, Europe and North America. Our analysis confirms the trend that demographic phenomena were mostly found to negatively influence biodiversity. However, a considerable number of studies also point towards impacts that were context dependent, either positive or negative under certain circumstances. In addition to that we identified significant gaps in research. In particular, there is a lack of addressing (1) other demographic aspects such as population decline, age structure or gender differences, (2) spatial variability of, e.g. human population growth, (3) long-term effects of demographic processes, and (4) the context dependency (e.g. regulations/law enforcement, type of human activities, and choice of scale or proxy). We conclude there is evidence that the relationship between biodiversity and demographic change is much more complex than expected and so far represented in research. Thus, we call for a social–ecological biodiversity research that particularly focusses on the functional relation between biodiversity and human activities, namely the different types, context, and interdependent dynamics (spatial and temporal) of this complex relation.

scholarly journals Rapid and continued population decline in the Spoon-billed Sandpiper Eurynorhynchus pygmeus indicates imminent extinction unless conservation action is taken

2010 ◽  
Vol 20 (2) ◽  
pp. 95-111 ◽  
Author(s):  
CHRISTOPH ZÖCKLER ◽  
EVGENY E. SYROECHKOVSKIY ◽  
PHILIP W. ATKINSON
Keyword(s):  
Captive Breeding ◽  
Population Decline ◽  
Adult Survival ◽  
Mortality Factor ◽  
Rapid Decline ◽  
Migration Route ◽  
Ageing Population ◽  
Conservation Action ◽  
North East ◽  
Wintering Areas

SummaryThe Spoon-billed Sandpiper Eurynorhynchus pygmeus (IUCN Category: Critically Endangered) is in rapid decline. Data from across the entire breeding range (Chukotka and Koryakya in the Russian far north-east) and especially from the well-studied southern core breeding area at Meinypilgyno, confirm the continuing strong decline. At four breeding sites, where more than two counts were available for analysis, the decline was estimated at 26% per annum between 2002 and 2009, or an 88% decline over this period. Allowing for unsurveyed areas, this equates to a decline from a total population of approximately 1,000 breeding pairs in 2000 to 120–220 in 2009. Breeding studies at Meinypilgyno in 2003–2007 (not 2006) showed that the proportion of nests hatching at least one chick was 0.65 and once chicks left the nest, the mean brood size of chicks up to one week old was 1.99. Where it was possible to follow broods, 0.61 chicks fledged per nesting attempt. Survival and recruitment analysis of birds ringed at Meinypilgyno indicated that annual adult survival did not significantly differ over the 2003–2009 study but that recruitment in to the adult breeding population was effectively zero in all but one year of the study (2005). Resighting data for the last two years of the study were sparse due to very low numbers of marked adults being recorded and survival rates over the last 2–3 years of the study must therefore be treated with caution. The analysis therefore indicated that after fledging, survival during immaturity must be very low, leading to a low (or no) recruitment into an ageing population. Recent observations collated from the non-breeding areas confirm the declining trend observed in the breeding areas and imply that the main threats to the population lie along the migration route or in the wintering areas. These are poorly known although hunting in the wintering areas has been identified as a major mortality factor. Other threats include major loss of their intertidal habitats, and collection of birds on the breeding areas by specimen collectors. Improved monitoring in both the breeding and non-breeding areas as well as research on juvenile survival is recommended. Concerted international conservation action is essential if this species is to avoid extinction. This requires (i) improved understanding of the main wintering and staging areas and associated threats; (ii) addressing those threats that can be tackled with immediate effect, such as hunting; (iii) continued long-term monitoring on the breeding areas; (iv) an exploration of other potential breeding areas; (v) conservation action at all important stop-over and wintering sites along the entire flyway and (vi) consideration of a captive-breeding programme to ensure the survival of this species.

scholarly journals The conservation status of the Chinese alligator

Oryx ◽  
1999 ◽  
Vol 33 (2) ◽  
pp. 152-159 ◽  
Author(s):  
John Thorbjarnarson ◽  
Wang Xiaoming
Keyword(s):  
Captive Breeding ◽  
Wild Population ◽  
Conservation Status ◽  
Population Decline ◽  
Anhui Province ◽  
Reserve Design ◽  
Wild Populations ◽  
Current Conservation ◽  
Term Survival ◽  
Chinese Alligator

AbstractThe Chinese alligator Alligator sinensis is one of the world's most endangered reptiles. At one time widespread throughout much of the lower Yangzi River basin, the remaining wild individuals are now restricted to a small area in southern Anhui Province and perhaps in adjacent Zhejiang Province. Population estimates conducted in the 1980s suggested that only 500–735 wild individuals remained at that time. Current figures suggest that the wild population is c. 400 individuals and continues to decline. The principal factor contributing to historic population decline has been habitat loss, but deliberate killing of alligators and the heavy use of pesticides have also had significant negative effects. The current conservation programme in Anhui Province is based on captive breeding and the establishment of a reserve for small groups of wild alligators. However, the inferred recent decline in the size of the wild population suggests that the reserve design is inadequate for the long-term survival of alligators. Programmes to survey the status of the remaining wild populations and evaluate the feasibility of establishing new wild populations by reintroducing captive-bred animals are currently being developed.

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