Two new species of the genus Goniurosaurus (Squamata: Sauria: Eublepharidae) from southern China

Yang, Jian-Huan; Chan, Bosco Pui-Lok

doi:10.11646/zootaxa.3980.1.4

Cited by 28 publications

(36 citation statements)

References 10 publications

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“…Unfortunately, it seems that many of the newly described species will only have an ephemeral existence as living organisms known to science, as so many of them are threatened with extinction – because of their small range sizes and their rarity they may become coveted trophies for the pet trade (Stuart et al ., ; Yang & Chan, ). Some of the species described during this century are already lost – probably prey to invasive species in Reunion (Arnold & Bour, ), the Caribbean (Hedges & Conn, ) and Fiji (Pregill & Worthy, ; Pregill & Steadman, ; the species described therein, Lapitiguana impensa and Brachylophus gibbonsi are not represented in Uetz, and thus not used in the analyses conducted herein).…”

Section: Discussionmentioning

confidence: 99%

Small, rare and trendy: traits and biogeography of lizards described in the 21st century

Meiri

2016

Journal of Zoology

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The pace of new reptile species descriptions, especially of new lizard descriptions, is rapidly increasing. The number of recognized lizard species has increased by more than 30% since the turn of the century. I examined the traits of newly described lizard taxa, and compared them to those of species described earlier, to predict where new species will be found, what traits they have, and whether they are likely to be more extinction-prone than well-known species. I compiled data on the biogeography and ecology of newly described forms and examined the relationship between these traits and the date of description. As expected, new descriptions are generally of small species, predominantly with small geographic ranges. Most species have been described from the Oriental Realm, whereas few new species were described from Africa. New descriptions are disproportionally biased in favor of geckos and of nocturnal species -and, surprisingly, contain few subterranean forms. Newly described lizard species are more likely to be threatened with extinction and may be more susceptible to population decline. Although the rate of new lizard descriptions is still accelerating, this work contributes to predicting what types of species are likely to be found in the future -and where. The small ranges of such species, in regions suffering from severe habitat degradation, suggests that strong mitigation measures are needed to ensure that many of these species will not be lost shortly after being described.

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Section: Discussionmentioning

confidence: 99%

Small, rare and trendy: traits and biogeography of lizards described in the 21st century

Meiri

2016

Journal of Zoology

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“…Species that have a high profile and are particularly rare or sensitive to disturbance (Blumstein 2006) Crates unpub. ), knowledge of which can potentially spread rapidly through observer networks (Lindenmayer and Scheele 2017). Whist there is also high demand to observe Plains-Wanderers, the small proportion of the population at risk from anthropogenic disturbance makes an anthropogenic CAE in the Plains-Wanderer unlikely.…”

Section: Anthropogenicmentioning

confidence: 99%

Undetected Allee effects in Australia’s threatened birds: implications for conservation

Crates

Rayner

Stojanović

et al. 2017

Emu - Austral Ornithology

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Allee effects occur when survival or reproductive success declines with decreasing population size or density. Species most severely impacted by Allee effects may be the very species for which these effects will be hardest to detect and overcome. This impedes effective conservation through a lack of evidence to drive management actions. We review the literature to identify (1) component Allee effects (components of fitness) which could lead to a demographic Allee effect (effect of all components on the population growth rate) in bird populations; and (2) traits that make species susceptible to component Allee effects. Concurrently, we assess the potential for undetected Allee effects to negatively influence the population growth rate of 14 critically endangered Australian bird species or subspecies. Whilst some (e.g. Helmeted Honeyeater) are unlikely to suffer from a demographic Allee effect, several (e.g. Great Knot, Orange-bellied Parrot) are susceptible to a number of component Allee effects and, hence, a demographic Allee effect. However, traits of the Regent Honeyeater suggests this species' decline in particular is accelerated by an undetected demographic Allee effect. For this species and others, an inability to detect Allee effects need not preclude efforts to account for their potential presence through precautionary conservation management.

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“…Tiger geckos of the genus Goniurosaurus currently comprise 19 species with a disjunct distribution in Southeast Asia and East Asia (Chen et al 2014;Grismer et al 1994Honda and Ota 2017;Liang et al 2018;Yang and Chan 2015;Zhou et al 2018;Ziegler et al 2008). The genus contains a high level of local endemism and many species have been recorded only from a single locality, mountain range or archipelago of China, Japan and Vietnam.…”

Section: Introductionmentioning

confidence: 99%

“…The genus contains a high level of local endemism and many species have been recorded only from a single locality, mountain range or archipelago of China, Japan and Vietnam. Goniurosaurus is also considered as one of the most susceptible reptile groups due to its generally low population densities and restricted distribution areas, which make tiger geckos particularly threatened by extinction through habitat loss and over-harvesting for the pet trade (Ngo et al 2016b;Yang and Chan 2015).…”

Section: Introductionmentioning

confidence: 99%

A case study on trade in threatened Tiger Geckos (Goniurosaurus) in Vietnam including updated information on the abundance of the Endangered G. catbaensis

Ngo¹,

Nguyen²,

Phan³

et al. 2019

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Tiger geckos of the genusGoniurosaurusare considered as a susceptible reptile group, due to their restricted distribution ranges, specialisation to specific microhabitats and generally low population densities. While still new species have been discovered recently,Goniurosaurusspecies are threatened by extinction through habitat loss and collection for the pet trade. Of the 19 described species, for only eight species, the conservation status has been assessed within the IUCN Red List between 2016 and 2018 and all have been classified in the threat categories VU (Vulnerable), EN (Endangered) and CR (Critically Endangered).Goniurosaurusspp. are popular in the international pet market at least since the 1990s and several species experienced local extirpations as a consequence of massive over-collection in the past. However, tiger geckos have not been paid much attention for conservation, amongst others, due to the lack of comprehensive knowledge on their conservation status and biology. This study provides an overview of international trade inGoniurosaurusbased on available data from 1999 to 2018 in the U.S. as well as data from online surveys and interviews in Europe and Vietnam, with the main focus on species native to Vietnam. All five tiger gecko species known from Vietnam were found in the local trade as wild captures for the national and international market and / or in the U.S. and Europe for relatively higher prices. We found that entire trade chains are very long (including several transfers and dealers involved) and that keeping and transport happen under poor conditions. We herein provide updated information on the abundance of the Endangered Cat Ba Tiger Gecko, which was recently shown to not only occur at its type locality, Cat Ba Island, Hai Phong City, North Vietnam, but also to inhabit small offshore islands in the Ha Long Bay, Quang Ninh Province. While the wild effective population was found to be relatively stable on four islands in Ha Long Bay, consisting of about 124 and 129 individuals in July 2017 and April 2018, respectively, the abundance of other sub-populations, impacted by anthropogenic pressures were found to be very low (2–10 individuals). Based on our findings, we propose stringent conservation measures to more efficiently protect wild tiger gecko populations, such as the inclusion in the Governmental Decree in Vietnam, the assessment of remaining species in the IUCN Red List of Threatened Species and the inclusion in the Appendices of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES).

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Two new species of the genus Goniurosaurus (Squamata: Sauria: Eublepharidae) from southern China

Cited by 28 publications

References 10 publications

Small, rare and trendy: traits and biogeography of lizards described in the 21st century

Small, rare and trendy: traits and biogeography of lizards described in the 21st century

Undetected Allee effects in Australia’s threatened birds: implications for conservation

A case study on trade in threatened Tiger Geckos (Goniurosaurus) in Vietnam including updated information on the abundance of the Endangered G. catbaensis

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