Pub Date : 2023-06-27DOI: 10.30906/1026-2296-2023-30-3-175-183
A. Pham, B. Ngo, Thuy Van Tran, L. Doan, Chung Duc Ngo, T. Nguyen
The Big Headed Treefrog, Polypedates megacephalus Hallowell, 1861, is widespread throughout subtropical and tropical regions from northeastern India to South Myanmar. In Vietnam, P. megacephalus is currently known in the North. However, the knowledge about the feeding ecology of this White-lipped Treefrog is still lacking. As a result of our field trips in Son La and Lai Chau provinces, northern Vietnam, this study provides novel data about the feeding ecology of P. megacephalus. We used the stomach-flushing method to obtain the stomach contents of 232 individuals at three sites. A total of 19 prey categories with 415 items were found in the stomachs of P. megacephalus. This species has a wide food spectrum and the dominant prey items of P. megacephalus were Araneae, Opiliones, insect larvae, Blattodea, Coleoptera, Hemiptera, Hymenoptera, Isoptera, and Orthoptera. The importance index for these categories ranged from 1.87% to 31.03%. Orthoptera was the prey category with the highest frequency of occurrence and its representatives were found in 81 stomachs. The result of multiple regression analysis indicated that both snout-vent length and mouth width were associated positively with prey sizes consumed by P. megacephalus.
{"title":"Feeding Ecology of the Big Headed Treefrog, Polypedates megacephalus (Amphibia: Anura: Rhacophoridae), from Northwestern Vietnam","authors":"A. Pham, B. Ngo, Thuy Van Tran, L. Doan, Chung Duc Ngo, T. Nguyen","doi":"10.30906/1026-2296-2023-30-3-175-183","DOIUrl":"https://doi.org/10.30906/1026-2296-2023-30-3-175-183","url":null,"abstract":"The Big Headed Treefrog, Polypedates megacephalus Hallowell, 1861, is widespread throughout subtropical and tropical regions from northeastern India to South Myanmar. In Vietnam, P. megacephalus is currently known in the North. However, the knowledge about the feeding ecology of this White-lipped Treefrog is still lacking. As a result of our field trips in Son La and Lai Chau provinces, northern Vietnam, this study provides novel data about the feeding ecology of P. megacephalus. We used the stomach-flushing method to obtain the stomach contents of 232 individuals at three sites. A total of 19 prey categories with 415 items were found in the stomachs of P. megacephalus. This species has a wide food spectrum and the dominant prey items of P. megacephalus were Araneae, Opiliones, insect larvae, Blattodea, Coleoptera, Hemiptera, Hymenoptera, Isoptera, and Orthoptera. The importance index for these categories ranged from 1.87% to 31.03%. Orthoptera was the prey category with the highest frequency of occurrence and its representatives were found in 81 stomachs. The result of multiple regression analysis indicated that both snout-vent length and mouth width were associated positively with prey sizes consumed by P. megacephalus.","PeriodicalId":48693,"journal":{"name":"Russian Journal of Herpetology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48549283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-25DOI: 10.30906/1026-2296-2023-30-2-65-71
M. Rais, Nida Amjad, A. Akram, A. Ibrahim, Syed Ali Hasnain Mosvi, A. Naseer, Sobya Zaman
The scientific data on ecology of amphibians from Pakistan are scarce. Asian Common Toad (Duttaphrynus melanostictus) is widely distributed in South Asia, and has been introduced outside its range causing severe ecological problems. We gathered data on morphometrics, habitat and breeding activity of the species in its western edge, North Punjab, Pakistan, of the range. The morphometric measurements of Asian Common Toad showed that the males were 49 ± 3.4 mm in snout vent length while the females were 58 ± 5.5 mm. Of the 13 measurements tested, the factor analysis produced five (head width, forelimb length, femur length, width of upper eyelid and foot length) significant measurements (r 0.80) for male while six (snout-vent length, head width, head length, greatest tympanum diameter, forelimb length, length of tarsus and foot) for female. The substrate of the habitat of Asian Common Toad was recorded as muddy to stony; water with neutral to slightly alkaline pH; dominated by herbs: Cannabis sativa, Parthenium hysterophorus; shrubs: Dodonaea viscosa, Lantana camara; grasses: Cynodon dactylon, Dactyloctenium aegyptium; and hydrophytes Alternanthera sessilis and Centella asiatica. The mean air and water temperature (day) during the breeding period were 27 – 30.5 and 25 – 28.5°C, respectively. The toad species laid eggs in small sized pools with lentic to slow-moving water with the mean depth of 32 – 64 cm. The males were more abundant than females (2.14♂:1♀) at the breeding sites. The advertisement call was of 9.3 ± 0.80 sec duration with a single note and 49.5 ± 6.5 nodes, –7.45 ± 0.95 average amplitude, 776 ± 51.8 Hz minimum frequency and 7011 ± 1680 Hz maximum frequency.
{"title":"Morphometrics, Habitat and Breeding Activity of Asian Common Toad, Duttaphrynus melanostictus, in Pakistan","authors":"M. Rais, Nida Amjad, A. Akram, A. Ibrahim, Syed Ali Hasnain Mosvi, A. Naseer, Sobya Zaman","doi":"10.30906/1026-2296-2023-30-2-65-71","DOIUrl":"https://doi.org/10.30906/1026-2296-2023-30-2-65-71","url":null,"abstract":"The scientific data on ecology of amphibians from Pakistan are scarce. Asian Common Toad (Duttaphrynus melanostictus) is widely distributed in South Asia, and has been introduced outside its range causing severe ecological problems. We gathered data on morphometrics, habitat and breeding activity of the species in its western edge, North Punjab, Pakistan, of the range. The morphometric measurements of Asian Common Toad showed that the males were 49 ± 3.4 mm in snout vent length while the females were 58 ± 5.5 mm. Of the 13 measurements tested, the factor analysis produced five (head width, forelimb length, femur length, width of upper eyelid and foot length) significant measurements (r 0.80) for male while six (snout-vent length, head width, head length, greatest tympanum diameter, forelimb length, length of tarsus and foot) for female. The substrate of the habitat of Asian Common Toad was recorded as muddy to stony; water with neutral to slightly alkaline pH; dominated by herbs: Cannabis sativa, Parthenium hysterophorus; shrubs: Dodonaea viscosa, Lantana camara; grasses: Cynodon dactylon, Dactyloctenium aegyptium; and hydrophytes Alternanthera sessilis and Centella asiatica. The mean air and water temperature (day) during the breeding period were 27 – 30.5 and 25 – 28.5°C, respectively. The toad species laid eggs in small sized pools with lentic to slow-moving water with the mean depth of 32 – 64 cm. The males were more abundant than females (2.14♂:1♀) at the breeding sites. The advertisement call was of 9.3 ± 0.80 sec duration with a single note and 49.5 ± 6.5 nodes, –7.45 ± 0.95 average amplitude, 776 ± 51.8 Hz minimum frequency and 7011 ± 1680 Hz maximum frequency.","PeriodicalId":48693,"journal":{"name":"Russian Journal of Herpetology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48231373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-25DOI: 10.30906/1026-2296-2023-30-2-88-100
S. Litvinchuk, Mariya I. Matiushova, O. Bezman-Moseyko, G. A. Lada, Dmitry V. Skorinov, J. M. Rosanov, L. Borkin
Hybridogenesis is well-known attributes of water frogs of the genus Pelophylax. The P. esculentus complex consists of two parental species, P. lessonae and P. ridibundus, as well as their hemiclonal (sometimes meroclonal) hybrid, P. esculentus. DNA flow cytometry, genetic and morphometric analyses were used to examine water frog compositions in 27 localities (n = 212) throughout the Dniester River valley in Moldova. Two species were revealed in the studied region (42% individuals were P. esculentus and 58% P. ridibundus). All frogs proved to be diploid. We registered the first species in 74% localities and the second in 78%. Populations, where we found only P. ridibundus occurred in 26% localities and only P. esculentus in 22%, while mixed population systems in 52%. Both species were usually observed in open water bodies and rivers that flow down through agricultural land and urban areas. In populations of P. esculentus the number of males strongly exceeded (90%) the number of females. The half of studied hybrid males was sterile, and most of fertile hybrid males produced sperm with the genome of P. lessonae. Several hybrid males gave the mixture of sperm with genomes of P. lessonae and P. ridibundus (amphispermy) and only one male with the P. ridibundus genome. Both species had the mitochondrial DNA of P. ridibundus. Based on nuclear markers, in P. esculentus and P. ridibundus we revealed the presence of alleles of the closely related Anatolian species P. cf. bedriagae. This might affect the successful reproduction of hybridogenetic P. esculentus. However, comparison of percentage of sterile males and alleles of P. cf. bedriagae among hybrids showed no correlation.
{"title":"Distribution, Population Systems, and Peculiarities of Hybrid Gametogenesis in Water Frogs (Pelophylax esculentus complex) in the Dniester River Valley (Moldova)","authors":"S. Litvinchuk, Mariya I. Matiushova, O. Bezman-Moseyko, G. A. Lada, Dmitry V. Skorinov, J. M. Rosanov, L. Borkin","doi":"10.30906/1026-2296-2023-30-2-88-100","DOIUrl":"https://doi.org/10.30906/1026-2296-2023-30-2-88-100","url":null,"abstract":"Hybridogenesis is well-known attributes of water frogs of the genus Pelophylax. The P. esculentus complex consists of two parental species, P. lessonae and P. ridibundus, as well as their hemiclonal (sometimes meroclonal) hybrid, P. esculentus. DNA flow cytometry, genetic and morphometric analyses were used to examine water frog compositions in 27 localities (n = 212) throughout the Dniester River valley in Moldova. Two species were revealed in the studied region (42% individuals were P. esculentus and 58% P. ridibundus). All frogs proved to be diploid. We registered the first species in 74% localities and the second in 78%. Populations, where we found only P. ridibundus occurred in 26% localities and only P. esculentus in 22%, while mixed population systems in 52%. Both species were usually observed in open water bodies and rivers that flow down through agricultural land and urban areas. In populations of P. esculentus the number of males strongly exceeded (90%) the number of females. The half of studied hybrid males was sterile, and most of fertile hybrid males produced sperm with the genome of P. lessonae. Several hybrid males gave the mixture of sperm with genomes of P. lessonae and P. ridibundus (amphispermy) and only one male with the P. ridibundus genome. Both species had the mitochondrial DNA of P. ridibundus. Based on nuclear markers, in P. esculentus and P. ridibundus we revealed the presence of alleles of the closely related Anatolian species P. cf. bedriagae. This might affect the successful reproduction of hybridogenetic P. esculentus. However, comparison of percentage of sterile males and alleles of P. cf. bedriagae among hybrids showed no correlation.","PeriodicalId":48693,"journal":{"name":"Russian Journal of Herpetology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47440972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-25DOI: 10.30906/1026-2296-2023-30-2-72-78
D. Do, C. Pham, T. Nguyen, T. Ziegler
Based on a new collection from southern Vietnam, here we report five poorly known species of the genus Oligodon for the first time from Phu Yen Province. We herein provide morphological descriptions for Oligodon cattienensis, O. cinereus pallidocinctus, O. deuvei, O. moricei, and O. saintgironsi, including ecological notes for the newly recorded species. In the case of Oligodon moricei, our new finding is the second known individual and the first photograph of a living specimen of the species.
{"title":"New Records of Poorly Known Kukri Snakes from Southern Vietnam Including the Proof of the First Living Individual of Oligodon moricei (Squamata: Colubridae)","authors":"D. Do, C. Pham, T. Nguyen, T. Ziegler","doi":"10.30906/1026-2296-2023-30-2-72-78","DOIUrl":"https://doi.org/10.30906/1026-2296-2023-30-2-72-78","url":null,"abstract":"Based on a new collection from southern Vietnam, here we report five poorly known species of the genus Oligodon for the first time from Phu Yen Province. We herein provide morphological descriptions for Oligodon cattienensis, O. cinereus pallidocinctus, O. deuvei, O. moricei, and O. saintgironsi, including ecological notes for the newly recorded species. In the case of Oligodon moricei, our new finding is the second known individual and the first photograph of a living specimen of the species.","PeriodicalId":48693,"journal":{"name":"Russian Journal of Herpetology","volume":"62 2","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41282813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-25DOI: 10.30906/1026-2296-2023-30-2-112-117
M. Orlova, I. Doronin, M. A. Doronina, N. Anisimov, I. G. Dolgova
Trombiculid mites are known as vectors of larvae of Ericotrombidium caucasicum Schluger, 1967, Lacertacarus latus Schluger et Vasilieva, 1977, and Schoengastia sp. chigger mites (Acariformes: Trombiculidae) were collected from lizards Lacerta strigata and L. agilis (Reptilia: Lacertidae) in the Caucasus and adjacent territory (Iran). Our record of Ericotrombidium caucasicum in Azerbaijan is the first finding of the species in this country. Also, results of E. caucasicum on L. strigata and Lacertacarus latus on L. agilis are new host-parasite associations. Schoengastia sp. has been reported from L. strigata for the first time.
{"title":"A Review of Chigger Mites (Trombiculidae) Associated with Lacerta spp. (Reptilia: Lacertidae) from Caucasus and Adjacent Territory","authors":"M. Orlova, I. Doronin, M. A. Doronina, N. Anisimov, I. G. Dolgova","doi":"10.30906/1026-2296-2023-30-2-112-117","DOIUrl":"https://doi.org/10.30906/1026-2296-2023-30-2-112-117","url":null,"abstract":"Trombiculid mites are known as vectors of larvae of Ericotrombidium caucasicum Schluger, 1967, Lacertacarus latus Schluger et Vasilieva, 1977, and Schoengastia sp. chigger mites (Acariformes: Trombiculidae) were collected from lizards Lacerta strigata and L. agilis (Reptilia: Lacertidae) in the Caucasus and adjacent territory (Iran). Our record of Ericotrombidium caucasicum in Azerbaijan is the first finding of the species in this country. Also, results of E. caucasicum on L. strigata and Lacertacarus latus on L. agilis are new host-parasite associations. Schoengastia sp. has been reported from L. strigata for the first time.","PeriodicalId":48693,"journal":{"name":"Russian Journal of Herpetology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45790618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-25DOI: 10.30906/1026-2296-2023-30-2-79-87
A. Kidov, S. Lyapkov, I. Stepankova, K. A. Afrin, E. A. Kidova, T. E. Kondratova, S. Litvinchuk
The paper reports the results of the first skeletochronological study of age structure and distinguishing characteristics of growth in the triploid toad Bufotes baturae, inhabitant of Sasyk-Bulak hot spring in the Pamir Mountains (3797 m a.s.l.). Minimal and maximum ages of males of the species were three and seven years, respectively. The age of females ranged from three to six years. Mean age for both sexes was 4.0 years. The majority of males (46.2%) were three years old, most females (58.8%) were four years old. The age of sexual maturity was reached after three hibernations (46% in males and 24% in females). The majority of toads breed once at the age of three or four years. Only few (18% in females and 23% in males) individuals in this population were older. Harsh high-altitude cold desert conditions and limited food resources may cause high mortality of the toads. The correlation between the minimal age at sexual maturity and the degree of dryness of climate was demonstrated among species of the genus Bufotes. As a rule, toads which live in more humid climatic conditions mature earlier. Perhaps, this explains that substantial part of semi-aquatic individuals of B. baturae in the hot spring mature at earlier age (3 years) than other polyploid species (4 – 5 years) that inhabit arid environments. In both sexes of B. baturae, growth rate was similar to that of other closely related high-mountain species, diploid B. latastii and triploid B. pseudoraddei.
{"title":"Age Structure and Growth Rate of the Triploid Batura Toad, Bufotes baturae (Anura: Bufonidae), Inhabitant of a High Altitude Hot Spring in the Eastern Pamirs (Tajikistan)","authors":"A. Kidov, S. Lyapkov, I. Stepankova, K. A. Afrin, E. A. Kidova, T. E. Kondratova, S. Litvinchuk","doi":"10.30906/1026-2296-2023-30-2-79-87","DOIUrl":"https://doi.org/10.30906/1026-2296-2023-30-2-79-87","url":null,"abstract":"The paper reports the results of the first skeletochronological study of age structure and distinguishing characteristics of growth in the triploid toad Bufotes baturae, inhabitant of Sasyk-Bulak hot spring in the Pamir Mountains (3797 m a.s.l.). Minimal and maximum ages of males of the species were three and seven years, respectively. The age of females ranged from three to six years. Mean age for both sexes was 4.0 years. The majority of males (46.2%) were three years old, most females (58.8%) were four years old. The age of sexual maturity was reached after three hibernations (46% in males and 24% in females). The majority of toads breed once at the age of three or four years. Only few (18% in females and 23% in males) individuals in this population were older. Harsh high-altitude cold desert conditions and limited food resources may cause high mortality of the toads. The correlation between the minimal age at sexual maturity and the degree of dryness of climate was demonstrated among species of the genus Bufotes. As a rule, toads which live in more humid climatic conditions mature earlier. Perhaps, this explains that substantial part of semi-aquatic individuals of B. baturae in the hot spring mature at earlier age (3 years) than other polyploid species (4 – 5 years) that inhabit arid environments. In both sexes of B. baturae, growth rate was similar to that of other closely related high-mountain species, diploid B. latastii and triploid B. pseudoraddei.","PeriodicalId":48693,"journal":{"name":"Russian Journal of Herpetology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42959600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-25DOI: 10.30906/1026-2296-2023-30-2-124-126
Wolfgang Böhme
{"title":"Commemorating Prof. Dr. Scott Michael Moody (1949 – 2022)","authors":"Wolfgang Böhme","doi":"10.30906/1026-2296-2023-30-2-124-126","DOIUrl":"https://doi.org/10.30906/1026-2296-2023-30-2-124-126","url":null,"abstract":"","PeriodicalId":48693,"journal":{"name":"Russian Journal of Herpetology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45381611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-25DOI: 10.30906/1026-2296-2023-30-2-101-111
Cai Bo, Jiang Jianping, Wu Yayong, Huang Song, Fei Dongbo, Dingxu Li
Here, we describe a new species Calamaria jinggangensis sp. nov. from Mt. Jinggang, Jiangxi Province, China. It can be distinguished from the sister species of C. arcana by these unique characters: posterior chin shields almost whole meeting in midline, dorsal scales reduced to 6 rows above last subcaudal at tail; lower maxillary teeth, higher palatine teeth and so on. The uncorrected p-distances of cyt b sequences between this new species and other 13 Calamaria included in the study is 6.46 – 19.93%. We also studied a female specimen from Mt. Wuyi as C. arcana new record in Fujian Province. In addition, it provided a diagnostic key to all the species of Calamaria from China.
{"title":"A New Species of Calamaria (Reptilia: Serpentes: Colubridae) from Western Jiangxi Province, China","authors":"Cai Bo, Jiang Jianping, Wu Yayong, Huang Song, Fei Dongbo, Dingxu Li","doi":"10.30906/1026-2296-2023-30-2-101-111","DOIUrl":"https://doi.org/10.30906/1026-2296-2023-30-2-101-111","url":null,"abstract":"Here, we describe a new species Calamaria jinggangensis sp. nov. from Mt. Jinggang, Jiangxi Province, China. It can be distinguished from the sister species of C. arcana by these unique characters: posterior chin shields almost whole meeting in midline, dorsal scales reduced to 6 rows above last subcaudal at tail; lower maxillary teeth, higher palatine teeth and so on. The uncorrected p-distances of cyt b sequences between this new species and other 13 Calamaria included in the study is 6.46 – 19.93%. We also studied a female specimen from Mt. Wuyi as C. arcana new record in Fujian Province. In addition, it provided a diagnostic key to all the species of Calamaria from China.","PeriodicalId":48693,"journal":{"name":"Russian Journal of Herpetology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46480728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-25DOI: 10.30906/1026-2296-2023-30-2-118-123
E. Arida, Alexander L. Stubbs, Umilaela Arifin, Benjamin R. Karin, Sarah M. Hykin, Sean B. Reilly, D. Iskandar, J. McGuire
The Timor monitor lizard, Varanus timorensis, is unknown for its reproductive attributes in the natural habitats in the Lesser Sunda Islands, Indonesia. Timor monitors inhabit tropical forests and modified lands for agriculture with estimated breeding season between May and July. Reproductive characteristics and overall natural history of this species were observed more in captive populations than resulted from field observations. We report a part of the natural history of V. timorensis, which includes cannibalism of juveniles in wild populations on Sabu Island, Indonesia. Our current records of adult body sizes denote a range of mature females, some of which are likely to have reproduced. Body sizes of Timor monitors on Timor and Sabu suggest a seasonal mating of wild lizards that coincides with dry season and hatching of eggs during the wet season. Breeding for this species is likely to occur once every year. Nevertheless, currently there is no data available on female fecundity that may shed light into reproductive capacity and breeding strategy of Timor monitor across the distribution range in the Lesser Sunda Islands.
{"title":"Cannibalism in Varanus timorensis (Squamata: Varanidae) Reveals Some Reproductive Traits of Wild Population on Sabu Island, Indonesia","authors":"E. Arida, Alexander L. Stubbs, Umilaela Arifin, Benjamin R. Karin, Sarah M. Hykin, Sean B. Reilly, D. Iskandar, J. McGuire","doi":"10.30906/1026-2296-2023-30-2-118-123","DOIUrl":"https://doi.org/10.30906/1026-2296-2023-30-2-118-123","url":null,"abstract":"The Timor monitor lizard, Varanus timorensis, is unknown for its reproductive attributes in the natural habitats in the Lesser Sunda Islands, Indonesia. Timor monitors inhabit tropical forests and modified lands for agriculture with estimated breeding season between May and July. Reproductive characteristics and overall natural history of this species were observed more in captive populations than resulted from field observations. We report a part of the natural history of V. timorensis, which includes cannibalism of juveniles in wild populations on Sabu Island, Indonesia. Our current records of adult body sizes denote a range of mature females, some of which are likely to have reproduced. Body sizes of Timor monitors on Timor and Sabu suggest a seasonal mating of wild lizards that coincides with dry season and hatching of eggs during the wet season. Breeding for this species is likely to occur once every year. Nevertheless, currently there is no data available on female fecundity that may shed light into reproductive capacity and breeding strategy of Timor monitor across the distribution range in the Lesser Sunda Islands.","PeriodicalId":48693,"journal":{"name":"Russian Journal of Herpetology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48029487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-17DOI: 10.30906/1026-2296-2023-30-1-11-19
T. Pengsakul, S. Senarat, W. Sukparangsi, K. Wongkamhaeng, Pisit Poolprsert, S. Wangkulangkul, J. Kettratad, W. Jiraungkoorskul
Reptile hematology provides important information to help assessment of health conditions and other reptile physiology and for biomarker discovery. The current hematology of snake from natural habitats of Thailand with morphological measurement is still rarely explored. In the present study, the extensive investigation on the morphometric analysis and characteristics of blood cells in the golden tree snake Chrysopelea ornata (Shaw, 1802) was examined and compared between sexes. Here we found that the majority of the squamate blood cells were erythrocyte in both sexes of this snake. It had the typical erythrocyte morphology showing eclipse shape with a central nucleus without significant difference between males and females. White blood cells (or leukocytes) in the snakes were a heterogeneous group with different nucleus shape and also shared a similar size between sexes. Interestingly, the length of thrombocytes was significantly different (P 0.05): longer in the male and shorter in the female snakes. From the blood smear technique, the heterogeneous group of the snake leukocyte included azurophil, heterophils neutrophil, basophil, lymphocyte, and monocyte without eosinophil. Remarkably, the highest proportion of the snake leukocyte was lymphocyte, followed by azurophils, and neutrophil. This proportion was similar in both sexes. The results from our hematological analysis could be provided as hematology-based health monitoring of the wild population for C. ornata in our land and other countries.
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