Determination of Age and Longevity of Road Mortal Indian Common Toad &lt;i&gt;Duttaphrynus melanostictus&lt;/i&gt; by Skeletochronology

Kumbar, Suresh M.; Lad, Swapnali B.

doi:10.30906/1026-2296-2019-24-3-217-222

Cited by 7 publications

(8 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Skeletochronology is one of the most used and reliable indirect methods for age determination in amphibians and reptiles [ 42 , 43 , 44 , 45 ]. In accordance with previous studies [ 46 , 47 , 48 , 49 ], our study shows the suitability of this method for the invasive population of this species as well, even though some difficulties were encountered in the interpretation of the results. The first (innermost) hematoxynophilic mark was often less stained than those successively layered, but it was considered here as a true LAG, based on its position with respect to the medullary cavity.…”

Section: Discussionsupporting

confidence: 92%

See 1 more Smart Citation

Life History Traits and Longevity of the Invasive Asian Common Toad Duttaphrynus melanostictus (Schneider, 1799) in Madagascar

Guarino,

Andreone,

Mezzasalma

et al. 2023

Animals

View full text Add to dashboard Cite

We analyzed the body length, age structure, and age at sexual maturity of the invasive Asian common toad Duttaphrynus melanostictus from different sites in Toamasina, east Madagascar. We used skeletochronology as a proxy for age estimation, while gonads were histologically analyzed to determine the age of sexual maturity. The analysis of pooled age data from three sites investigated in 2016 showed that both sexes were larger, although not older, than those of native populations. For the individuals from Madagascar, the males were significantly smaller and younger (mean ± SD, SVL: 71.4 ± 1.6 mm; age: 1.8 ± 0.7 years) than the females (SVL: 78.42 ± 1.9 mm; age: 2.7 ± 1.3 years), when the data were pooled, but when the data were analyzed separately for each of the three sites, similar results were obtained only for one site. The oldest recorded male and female were 3 and 6 years old, respectively. Gonadal histology showed that the males and females reach sexual maturity after the first and second years of age, respectively. Further studies are needed to understand if the larger size and faster growth rates observed in the invasive population of D. melanostictus in Madagascar are a consequence of more favorable environmental conditions with respect to the native range (e.g., the availability of larger trophic niches, a lack of competitors, and lower predatory pressure), and we suggest to extend the monitoring of these life history traits to understand how they might influence the invasion.

show abstract

Section: Discussionsupporting

confidence: 92%

“…So far, a skeletochronological estimate of the age of D. melanostictus has been provided for populations inhabiting different areas of India [ 46 , 47 , 48 , 49 ]. These studies suggest that the species generally live for a maximum of four [ 47 ], five [ 48 ], or six [ 49 ] years and only reaches nine years in exceptional cases [ 48 ].…”

Section: Discussionmentioning

confidence: 99%

Life History Traits and Longevity of the Invasive Asian Common Toad Duttaphrynus melanostictus (Schneider, 1799) in Madagascar

Guarino,

Andreone,

Mezzasalma

et al. 2023

Animals

View full text Add to dashboard Cite

show abstract

“…The number of LAG compared with the length of SVL at the pre-adult stage, adult males and adult females showed accurate results with a strong correlation between the two parameters. However, this study found several adult individuals who have entered the adult stage but do not have LAGs or pre-adult individuals but have one LAG (see Table 1; Andreone et al 2011;Li et al 2010;Kumbar and Pancharatna 2001;Kumbar and Pancharatna 2002;Kumbar and Lad 2017). Generally, the increase in SVL length was positively correlated with the increase in the number of LAGs.…”

Section: Discussionmentioning

confidence: 70%

“…Generally, the increase in SVL length was positively correlated with the increase in the number of LAGs. Following Andreone et al (2011), Li et al (2010), Kumbar and Pancharatna (2001), Kumbar and Pancharatna (2002) and Kumbar and Lad (2017), the absence of LAG was because the individual was not yet one year old, or it could also be due to the process of the bone formation so that there was no accumulation of calcium in the bones that produced LAG (Stiffler 1993). These result indicate that the formation of LAG were not only influence by internal factor but also by external factor included environmental and nutrition.…”

Section: Discussionmentioning

confidence: 99%

Short Communication: Determination of the age of the Paddy Field Frog, Fejervarya cancrivora (Anura: Dicroglossidae) by using skeletochronology

Phadmacanty

Kurniati

2019

Biodiversitas

View full text Add to dashboard Cite

Abstract. Phadmacanty NLPR, Kurniati H. 2019. Short Communication: Determination of the age of the Paddy Field Frog, Fejervarya cancrivora (Anura: Dicroglossidae) by using skeletochronology. Biodiversitas 20: 2739-2743. The age of 102 individuals of paddy field frog (Fejervarya cancrivora) from Karawang District, West Java, Indonesia was skeletochronological determined. Hematoxylinophilic lines interpreted as lines of arrested growth (LAG) were observed clearly in the femur bone suggesting that this technique can be used to estimate the age of the frog, although the level of accuracy is likely to be strongly influenced by external and internal factor. In general, age estimates look close to accuracy at mature age levels; which one LAG equals the age of the frog that has passed one year old. The age structure of F. cancrivora from a paddy field in Karawang District has the maximum age of five years in females and four years in males. In general, adult females were not significantly larger than adult males.

show abstract

“…The study of amphibians' population age structure is crucial to understanding population dynamics and species natural history, since it provides information regarding growth rate, sexual maturity, longevity, and reproductive lifespan (li et al 2010). The analysis of bone tissue to estimate age (known as skeletochronology) has been used in both fossil (Botha and Chinsamy 2000, Sander 2000, Tütken et al 2004, Botha-Brink et al 2018 and extant tetrapods, such as 'reptiles ' (Avens et al 2009' (Avens et al , goshe et al 2010, birds (Ricqlès et al 2003), and amphibians (Socha and Ogielska 2010, Cajade et al 2013, Bionda et al 2015, Sun et al 2016, Kumbar and lad 2017, Tessa et al 2017. Skeletochronology is based on the presence of growth rings (lines of arrested growth -lAgs) in transverse sections of the bones, in which broad lines represent the growth period and narrow lines represent a growth pause.…”

Section: Introductionmentioning

confidence: 99%

First record of growth rings for 11 native subtropical anuran species of South America

Brum

Loebens

Santos

et al. 2019

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

Skeletochronology is the most accurate method to estimate a population age structure. The methodology is based on the analysis of secondary bone tissue in order to count growth rings. This study aimed to provide initial data, allowing researchers to further work out in the age of individuals and populations, sampling evidence of the presence of growth rings in 11 native species (representing nine families) of a subtropical region of southern Brazil. Four bone samples of each specimen were used to perform the skeletochronological analysis: the penultimate phalanges of the 3rd and 4th fingers, the humerus, and the femur. The presence of growth rings was confirmed in the periosteal layer of the bones of all analyzed species. In comparison with phalanges, growth rings of humeri and femora are more irregular and less distinguishable. This is the first record of growth rings to the native species herein analised. The skeletochronology was proved to be an effective tool in determining the age of anuran amphibians from a subtropical region, since this environment presents well defined climatic seasonality.

show abstract

Determination of Age and Longevity of Road Mortal Indian Common Toad <i>Duttaphrynus melanostictus</i> by Skeletochronology

Cited by 7 publications

References 16 publications

Life History Traits and Longevity of the Invasive Asian Common Toad Duttaphrynus melanostictus (Schneider, 1799) in Madagascar

Life History Traits and Longevity of the Invasive Asian Common Toad Duttaphrynus melanostictus (Schneider, 1799) in Madagascar

Short Communication: Determination of the age of the Paddy Field Frog, Fejervarya cancrivora (Anura: Dicroglossidae) by using skeletochronology

First record of growth rings for 11 native subtropical anuran species of South America

Contact Info

Product

Resources

About