Population Dynamics of the Long-Tailed Clawed Salamander Larva, Onychodactylus fischeri, and Its Age Structure in Korea

Lee, Jung-Hyun; Ra, Nam-Yong; Eom, Junho; Park, Daesik

doi:10.5141/jefb.2008.31.1.031

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…Developmental biology of O. fischeri is less thoroughly investigated; it is known that it has even larger eggs (5-8 mm) (Serbinova and Solkin, 1992;Griffin and Solkin, 1995) and very long embry onic and larval periods (Regel and Epstein, 1975). Recently preliminary data on reproduction of O. fi scheri in natural conditions in Korea (Park, 2005) and also on larval development of this species have been published (Lee et al, 2008). Korean populations of O. fischeri also have very large eggs (4.9-7.2 mm) and larval development lasts up to three years.…”

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confidence: 99%

Pecularities of bony skeleton development in Asian clawed salamanders (Onychodactylus, Hynobiidae) related to embryonization

Vassilieva

Poyarkov

Iizuka

2013

Biol Bull Russ Acad Sci

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We studied skull, vertebral column, and limb skeleton development in Japanese clawed sala mander Onychodactylus japonicus (Hynobiidae). The study is based on the ontogenetic series of embryos and larvae obtained from wild captured adults by artificial induction of breeding using hormonal stimulation. The first stages of the skeleton formation in O. japonicus are shifted to the late embryonic period and hatching lar vae already possess a well ossified vertebral column, large number of skull ossifications and show signs of ossi fication in the forelimb skeleton. Compared to the primitive pattern of the skeleton development typical for other hynobiid salamanders, O. japonicus shows a number of heterochronies related to embryonization. In particular, this species is characterized by an earlier ossification of the vertebral column compared to that of the skull and by the delayed development and early reduction of the coronoid. Our results, along with the pre viously reported data on the skeleton development in the Fischer's clawed salamander O. fischeri (Smirnov and Vassilieva, 2002), indicate that the genus Onychodactylus is characterized by the loss or reduction of sev eral skeletal features typically found at early larval stages in other Hynobiidae species. In particular, provi sional bones (especially the coronoid) and their dentition are underdeveloped. In addition, it is corroborated that the first tooth generation is absent in Onychodactylus, whereas such monocuspid nonpedicellate tooth generation normally develops at the early larval stages of other caudate amphibians. Since similar patterns of skeleton ontogeny are observed in other caudate groups with different extent of embryonization, it is pro posed that, in different lineages of Urodela, the evolution of ontogeny followed similar pathways and was accompanied by the same changes in skeletogenesis.

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mentioning

confidence: 99%

Pecularities of bony skeleton development in Asian clawed salamanders (Onychodactylus, Hynobiidae) related to embryonization

Vassilieva

Poyarkov

Iizuka

2013

Biol Bull Russ Acad Sci

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“…Kaplan & Phillips, 2006 13. Lee et al, 200814. Borzée et al, 2019bBorzée and Min, 2021;Moon & Park, 2016 Frontiers in Environmental Science frontiersin.org 04 Groffen et al 10.3389/fenvs.2022.846481 users, with observations reaching a 'research grade' when more than two-thirds of the identifiers agree on a taxon, which generally prevents the misidentification of species, and can be updated at any time.…”

Section: Data Collectionmentioning

confidence: 99%

Breeding phenology and landscape use in all amphibian species from the Republic of Korea based on open-source data

Groffen

Andersen²,

Borzée³

2022

Front. Environ. Sci.

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Biodiversity is declining worldwide with habitat loss and climate change being among the main threats. While it is easy to quantify habitat loss, the impacts of climate change are less obvious. It is therefore important to understand species habitat use and breeding phenology before a significant shift results in the loss of knowledge. Here, we determined the habitat use and breeding phenology for all Korean amphibian species based on citizen science (8,763 observations), collected between 1997–2020. We found the breeding seasons as we defined them to be generally shorter than described in the literature despite large variations between species. Species were further dichotomised into early and late breeders with breeding periods peaking in mid-March and mid-June respectively. We found early breeding species to have a shortened hibernating period with only six days being consistently devoid of observations over the 23 years of the period studied for the species with the shortest inactive season. Habitat use was significantly different between all species, with pair-wise comparisons highlighting greater differences among rather than within genera, highlighting the threats to species across all genera. In addition, our results set a baseline for future analyses about climate change and habitat use.

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“…Similar to other parts of the world, many Korean salamanders and anurans have also been investigated with skeletochronology [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. Unfortunately, most of these studies with skeletochronology on Korean amphibians have not been able to identify the IVL.…”

Section: Introductionmentioning

confidence: 99%

Confirmation of the Applicability of Skeletochronology and Estimating the Age Structure of Kaloula borealis (Microhylidae: Anura) at Lake Sihwa, South Korea

Rahman

Lee

Park

et al. 2022

Biology

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Despite having some limitations, the use of skeletochronology—age determination by counting lines of arrested growth (LAGs)—in amphibians is increasing. The main limitation of using skeletochronology is identifying the innermost visible line (IVL) and counting the exact number of LAGs. Thus, we tested its applicability to Kaloula borealis, a class II endangered amphibian in South Korea. We reared juveniles in the lab to investigate the process of bone formation. This confirmed the development of one LAG each year. Hence, our study validates skeletochronology for the age determination of this species and recommends it for others that show similar growth patterns. Furthermore, the comparison of threshold diameters with the IVL of wild individuals confirmed no LAG1 resorption. The average age of males and females in this population was 2.75 ± 1.05 and 3.64 ± 3 years, respectively. We estimated sexual maturity at 2 years with rapid growth up to that stage in both sexes. We found a female-dominated sexual size dimorphism. This study offers accurate information on the life history traits and age structure of K. borealis that may help to evaluate population dynamics in other areas, identify vulnerable life stages and sites, assess the causes of population decline, and set conservation priorities.

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Population Dynamics of the Long-Tailed Clawed Salamander Larva, Onychodactylus fischeri, and Its Age Structure in Korea

Cited by 6 publications

References 5 publications

Pecularities of bony skeleton development in Asian clawed salamanders (Onychodactylus, Hynobiidae) related to embryonization

Pecularities of bony skeleton development in Asian clawed salamanders (Onychodactylus, Hynobiidae) related to embryonization

Breeding phenology and landscape use in all amphibian species from the Republic of Korea based on open-source data

Confirmation of the Applicability of Skeletochronology and Estimating the Age Structure of Kaloula borealis (Microhylidae: Anura) at Lake Sihwa, South Korea

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