Variation in dietary composition of granular spiny frogs (Quasipaa verrucospinosa) in central Vietnam

Binh Van Ngo, Ya Fu Lee, Chung Dac Ngo

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The granular spiny frog, Quasipaa verrucospinosa (Bourret, 1937), is native to Vietnam and classified as Near Threatened due to environmental degradation, loss of forest and stream habitats and human exploitation. We collected stomach contents of Q. verrucospinosa using a nonlethal stomach-flushing technique from three stream sites in the rain forests of Thù’a Thiên-Huế Province, central Vietnam, to investigate their food habits. Dietary analysis identified 2645 prey items of 27 orders and nine classes. Prey comprised mainly invertebrates, but also fishes, frogs and conspecific sub-adults. The major prey items as determined by frequency of occurrence, item count and percent volume were spiders, beetles, crabs, hymenopterans, grasshoppers, crickets and cicadas. Insects alone accounted for an importance value of 59.8%. The mean monthly prey volume consumed was positively and negatively correlated to temperature and rainfall, respectively. Consistent with the increased energetic needs prior to the main breeding season, the number of prey items and volume of prey consumed per frog were highest in the little rainy season. The volume of prey consumed was positively correlated with snout-vent length and mouth width of frogs, supporting the gape limitation hypothesis. Despite their larger size, however, females did not consume greater numbers of prey items or larger-sized prey than males. Adults consumed a higher diversity of prey and higher proportions of Araneae and Hemiptera than sub-adults, whereas females had a more even diet than males and consumed a higher proportion of Orthoptera.

Original languageEnglish
Pages (from-to)245-253
Number of pages9
JournalHerpetological Journal
Volume24
Issue number4
Publication statusPublished - 2014 Oct 1

Fingerprint

Vietnam
frog
frogs
Ptinidae
gape limitation
stomach
Cicadidae
cricket
grasshopper
environmental degradation
stomach content
grasshoppers
Gryllidae
Orthoptera
flushing
breeding season
spider
rain forests
Araneae
crab

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology
  • Ecological Modelling
  • Nature and Landscape Conservation

Cite this

@article{29696c8a4f7e41e4bc69cc2b012c73b8,
title = "Variation in dietary composition of granular spiny frogs (Quasipaa verrucospinosa) in central Vietnam",
abstract = "The granular spiny frog, Quasipaa verrucospinosa (Bourret, 1937), is native to Vietnam and classified as Near Threatened due to environmental degradation, loss of forest and stream habitats and human exploitation. We collected stomach contents of Q. verrucospinosa using a nonlethal stomach-flushing technique from three stream sites in the rain forests of Th{\`u}’a Thi{\^e}n-Huế Province, central Vietnam, to investigate their food habits. Dietary analysis identified 2645 prey items of 27 orders and nine classes. Prey comprised mainly invertebrates, but also fishes, frogs and conspecific sub-adults. The major prey items as determined by frequency of occurrence, item count and percent volume were spiders, beetles, crabs, hymenopterans, grasshoppers, crickets and cicadas. Insects alone accounted for an importance value of 59.8{\%}. The mean monthly prey volume consumed was positively and negatively correlated to temperature and rainfall, respectively. Consistent with the increased energetic needs prior to the main breeding season, the number of prey items and volume of prey consumed per frog were highest in the little rainy season. The volume of prey consumed was positively correlated with snout-vent length and mouth width of frogs, supporting the gape limitation hypothesis. Despite their larger size, however, females did not consume greater numbers of prey items or larger-sized prey than males. Adults consumed a higher diversity of prey and higher proportions of Araneae and Hemiptera than sub-adults, whereas females had a more even diet than males and consumed a higher proportion of Orthoptera.",
author = "{Van Ngo}, Binh and Lee, {Ya Fu} and Ngo, {Chung Dac}",
year = "2014",
month = "10",
day = "1",
language = "English",
volume = "24",
pages = "245--253",
journal = "Herpetological Journal",
issn = "0268-0130",
publisher = "British Herpetological Society",
number = "4",

}

Variation in dietary composition of granular spiny frogs (Quasipaa verrucospinosa) in central Vietnam. / Van Ngo, Binh; Lee, Ya Fu; Ngo, Chung Dac.

In: Herpetological Journal, Vol. 24, No. 4, 01.10.2014, p. 245-253.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Variation in dietary composition of granular spiny frogs (Quasipaa verrucospinosa) in central Vietnam

AU - Van Ngo, Binh

AU - Lee, Ya Fu

AU - Ngo, Chung Dac

PY - 2014/10/1

Y1 - 2014/10/1

N2 - The granular spiny frog, Quasipaa verrucospinosa (Bourret, 1937), is native to Vietnam and classified as Near Threatened due to environmental degradation, loss of forest and stream habitats and human exploitation. We collected stomach contents of Q. verrucospinosa using a nonlethal stomach-flushing technique from three stream sites in the rain forests of Thù’a Thiên-Huế Province, central Vietnam, to investigate their food habits. Dietary analysis identified 2645 prey items of 27 orders and nine classes. Prey comprised mainly invertebrates, but also fishes, frogs and conspecific sub-adults. The major prey items as determined by frequency of occurrence, item count and percent volume were spiders, beetles, crabs, hymenopterans, grasshoppers, crickets and cicadas. Insects alone accounted for an importance value of 59.8%. The mean monthly prey volume consumed was positively and negatively correlated to temperature and rainfall, respectively. Consistent with the increased energetic needs prior to the main breeding season, the number of prey items and volume of prey consumed per frog were highest in the little rainy season. The volume of prey consumed was positively correlated with snout-vent length and mouth width of frogs, supporting the gape limitation hypothesis. Despite their larger size, however, females did not consume greater numbers of prey items or larger-sized prey than males. Adults consumed a higher diversity of prey and higher proportions of Araneae and Hemiptera than sub-adults, whereas females had a more even diet than males and consumed a higher proportion of Orthoptera.

AB - The granular spiny frog, Quasipaa verrucospinosa (Bourret, 1937), is native to Vietnam and classified as Near Threatened due to environmental degradation, loss of forest and stream habitats and human exploitation. We collected stomach contents of Q. verrucospinosa using a nonlethal stomach-flushing technique from three stream sites in the rain forests of Thù’a Thiên-Huế Province, central Vietnam, to investigate their food habits. Dietary analysis identified 2645 prey items of 27 orders and nine classes. Prey comprised mainly invertebrates, but also fishes, frogs and conspecific sub-adults. The major prey items as determined by frequency of occurrence, item count and percent volume were spiders, beetles, crabs, hymenopterans, grasshoppers, crickets and cicadas. Insects alone accounted for an importance value of 59.8%. The mean monthly prey volume consumed was positively and negatively correlated to temperature and rainfall, respectively. Consistent with the increased energetic needs prior to the main breeding season, the number of prey items and volume of prey consumed per frog were highest in the little rainy season. The volume of prey consumed was positively correlated with snout-vent length and mouth width of frogs, supporting the gape limitation hypothesis. Despite their larger size, however, females did not consume greater numbers of prey items or larger-sized prey than males. Adults consumed a higher diversity of prey and higher proportions of Araneae and Hemiptera than sub-adults, whereas females had a more even diet than males and consumed a higher proportion of Orthoptera.

UR - http://www.scopus.com/inward/record.url?scp=84908111017&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84908111017&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:84908111017

VL - 24

SP - 245

EP - 253

JO - Herpetological Journal

JF - Herpetological Journal

SN - 0268-0130

IS - 4

ER -