Male Courtship Behavior of Tylototriton (Echinotriton) andersoni Boulenger under Laboratory Conditions

Utsunomiya, Taeko; Matsui, Masafumi

doi:10.5358/hsj.21.67

Cited by 5 publications

(3 citation statements)

References 7 publications

(17 reference statements)

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“…Data on the general ecology are still scarce for crocodile newts (see also Kieren et al, 2018), although several studies deal with the reproductive ecology of Echinotriton (Utsunomiya et al, 1978; Xie et al, 2000; Sparreboom et al, 2001; Utsunomiya and Matsui, 2002; Igawa et al, 2013). Only little information is available for Tylototriton , often only from anecdotal observations (e.g.…”

Section: Discussionmentioning

confidence: 99%

Cranial shape evolution of extant and fossil crocodile newts and its relation to reproduction and ecology

et al. 2020

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The diversity of the vertebrate cranial shape of phylogenetically related taxa allows conclusions on ecology and life history. As pleurodeline newts (the genera Echinotriton , Pleurodeles and Tylototriton ) have polymorphic reproductive modes, they are highly suitable for following cranial shape evolution in relation to reproduction and environment. We investigated interspecific differences externally and differences in the cranial shape of pleurodeline newts via two‐dimensional geometric morphometrics. Our analyses also included the closely related but extinct genus Chelotriton to better follow the evolutionary history of cranial shape. Pleurodeles was morphologically distinct in relation to other phylogenetically basal salamanders. The subgenera within Tylototriton ( Tylototriton and Yaotriton ) were well separated in morphospace, whereas Echinotriton resembled the subgenus Yaotriton more than Tylototriton . Oviposition site choice correlated with phylogeny and morphology. Only the mating mode, with a random distribution along the phylogenetic tree, separated crocodile newts into two morphologically distinct groups. Extinct Chelotriton likely represented several species and were morphologically and ecologically more similar to Echinotriton and Yaotriton than to Tylototriton subgenera. Our data also provide the first comprehensive morphological support for the molecular phylogeny of pleurodeline newts.

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Section: Discussionmentioning

confidence: 99%

Cranial shape evolution of extant and fossil crocodile newts and its relation to reproduction and ecology

et al. 2020

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“…The natural breeding habitats and behaviors of E. andersoni have been observed in detail both in the wild [9,10] and in the laboratory [11,12,13,14]. In a study by Utsunomiya and Matsui [11], a male crept around a female, sniffing around her body and drawing a thread of mucus from his cloacae so that the female was surrounded by spider web-like strings of mucous attached to the substrate.…”

Section: Introductionmentioning

confidence: 99%

“…In a study by Utsunomiya and Matsui [11], a male crept around a female, sniffing around her body and drawing a thread of mucus from his cloacae so that the female was surrounded by spider web-like strings of mucous attached to the substrate. The male then deposited a spermatophore by rubbing his cloacae against the substratum while swaying his body back and forth.…”

Section: Introductionmentioning

confidence: 99%

An Attempt at Captive Breeding of the Endangered Newt Echinotriton andersoni, from the Central Ryukyus in Japan

Igawa

Sugawara

Tado

et al. 2013

Animals

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Simple SummaryWe naturally bred the endangered Anderson’s crocodile newt (Echinotriton andersoni) and tested a laboratory farming technique using near-biotopic breeding cages with several male and female pairs collected from Okinawa, Amami, and Tokunoshima Islands. This is the first published report of successfully propagating an endangered species by using breeding cages in a laboratory setting for captive breeding. Our findings on the natural breeding and raising of larvae and adults are useful in breeding this endangered species, and can be applied to the preservation of other similarly wild and endangered species.AbstractAnderson’s crocodile newt (Echinotriton andersoni) is distributed in the Central Ryukyu Islands of southern Japan, but environmental degradation and illegal collection over the last several decades have devastated the local populations. It has therefore been listed as a class B1 endangered species in the IUCN Red List, indicating that it is at high risk of extinction in the wild. The species is also protected by law in both Okinawa and Kagoshima prefectures. An artificial insemination technique using hormonal injections could not be applied to the breeding of this species in the laboratory. In this study we naturally bred the species, and tested a laboratory farming technique using several male and female E. andersoni pairs collected from Okinawa, Amami, and Tokunoshima Islands and subsequently maintained in near-biotopic breeding cages. Among 378 eggs derived from 17 females, 319 (84.4%) became normal tailbud embryos, 274 (72.5%) hatched normally, 213 (56.3%) metamorphosed normally, and 141 (37.3%) became normal two-month-old newts; in addition, 77 one- to three-year-old Tokunoshima newts and 32 Amami larvae are currently still growing normally. Over the last five breeding seasons, eggs were laid in-cage on slopes near the waterfront. Larvae were raised in nets maintained in a temperature-controlled water bath at 20 °C and fed live Tubifex. Metamorphosed newts were transferred to plastic containers containing wet sponges kept in a temperature-controlled incubator at 22.5 °C and fed a cricket diet to promote healthy growth. This is the first published report of successfully propagating an endangered species by using breeding cages in a laboratory setting for captive breeding. Our findings on the natural breeding and raising of larvae and adults are useful in breeding this endangered species and can be applied to the preservation of other similarly wild and endangered species such as E. chinhaiensis.

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Multiple invasions of the Ryukyu Archipelago by Oriental frogs of the subgenus Odorrana with phylogenetic reassessment of the related subgenera of the genus Rana

Matsui

Shimada

Ota

et al. 2005

Molecular Phylogenetics and Evolution

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Male Courtship Behavior of Tylototriton (Echinotriton) andersoni Boulenger under Laboratory Conditions

Cited by 5 publications

References 7 publications

Cranial shape evolution of extant and fossil crocodile newts and its relation to reproduction and ecology

Cranial shape evolution of extant and fossil crocodile newts and its relation to reproduction and ecology

An Attempt at Captive Breeding of the Endangered Newt Echinotriton andersoni, from the Central Ryukyus in Japan

Multiple invasions of the Ryukyu Archipelago by Oriental frogs of the subgenus Odorrana with phylogenetic reassessment of the related subgenera of the genus Rana

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