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Mang Mountain National Nature Reserve in Hunan Yizhang Odorrana with flowers Odorrana breeding habitat selection and population dynamics

Author: FeiDongBo
Tutor: YangDaoDe
School: Central South University of Forestry Science and Technology
Course: Conservation and Utilization of Wild Fauna and Flora
Keywords: Yizhang Odorrana Flowers Odorrana Habitat selection Reproductive strategy Mang Mountain National Nature Reserve in Hunan
CLC: Q958
Type: Master's thesis
Year: 2010
Downloads: 130
Quote: 1
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Abstract

2007 FEI Liang, etc. will be distributed in Hunan Mang Mountain National Nature Reserve (hereinafter referred to as Mang Mountain Sanctuary) Longsheng Odorrana (Odorrana lungshengensis) provides for a new kind of Yizhang Odorrana (O. yizhangensis), because Yizhang Odorrana years has been mistaken for Longsheng Odorrana, so far there is no other Odorrana about Yizhang reported. Mang Mountain National Nature Reserve in Hunan Administration's strong support, the authors were on July 25, 2009 - August 5, August 26 - September 5, October 19 ~ 24, right Mang Mountain Sanctuary Yizhang smelly frog breeding habitat selection and population dynamics conducted a field survey, and select Habits similar flower Odorrana (O.schmakeri) were compared. The authors Yizhang Odorrana with flowers Odorrana specific distribution locations and distribution; Yizhang smelly smelly frog with flower frog habitat characteristics and habitat selection; Yizhang smelly smelly frog with flower frog population dynamics and reproductive biology; Yi Chapter Odorrana with flower Odorrana reproductive strategy to carry out field surveys. Through the survey found that: (1) a significant selection Yizhang Odorrana evening activities, a significant selection altitude 1051 ~ 1350m, shrub and grass vegetation is mixed forest trees, canopy and high temperature 21.0-26.8 ℃, air humidity 57.0% ~ 70.0%, Channel width 9.5 ~ 17.5m, surface width 3.7 ~ 8.3m, slow flow rate, water temperature 21.1 ~ 24.8 ℃, pH value of less than 7.0, dissolved oxygen is less than 4.5mg · L-1, depth of 10 ~ 30 cm, greater than the distance from the highway 100m, greater than the distance from the dam 1000m, Isle more water habitats; spend significantly Odorrana choose evening activities, a significant selection altitude 450 ~ 750m, shrub and grass vegetation type, canopy density is low, temperature 21.0 ~ 26.8 ℃, air humidity 71.0% ~ 84.0%, river width is greater than 25.5m, surface width 13.0 ~ 17.6m, more acute water flow rate, water temperature 21.1 ~ 24.8 ℃, pH value of 7.0 to 7.3, dissolved oxygen 4.5 ~ 5.5mg · L-1, water depths greater than 10cm, away from the road distance is less than 100m, the distance from the dam is less than 1000m, more exposed rocky habitats. (2) 94.12% of the breeding season will choose Yizhang Odorrana 1051 ~ 1350m above sea level of the river as a breeding ground for low-altitude river no Yizhang Odorrana distribution, while 80.56% of the flowers will choose Odorrana altitude of 450-750m river, a few flowers Odorrana also distributed in high altitude river, breeding grounds at different altitudes choice of a clear distinction between the two; As the temperature decreases, flowers Odorrana will gain altitude to low altitude river river migration while Yizhang Odorrana river will be a lot left to the forest migration. (3) The study found that sexually mature males Yizhang smelly head-body length of bore 49.5 ± 2.6 (n = 23), female frog head-body length 63.2 ± 4.0 (n = 8); mature males Odorrana flower head body length of 43.3 ± 2.3 (n = 223), female frog head-body length 78.7 ± 5.3 (n = 19); Yizhang smelly frog and flower Odorrana sex ratio ♀: (?) were 1:5.4 and 1:13.3 , significantly less than the specified number of female frogs males; Yizhang Odorrana fecundity is about 371, according to the literature spend Odorrana brood about 1500, the gap between great. Survival may be due to different pressures and the formation of different reproductive strategies: Flower Odorrana high fecundity, with a large number of offspring did not respond to environmental pressures; rather smelly frog habitat Yizhang less pressure, fertility is lower. (4) Yizhang smelly frog breeding period of July to September, flowers smelly frog breeding season is from July to August, there is no clear differentiation, but through both breeding habitat selection analysis showed that both in the spawning field selection of multiple ecological factors on differentiation is extremely significant. Yizhang smelly smelly frog frogs and flowers in Mang Mountain Sanctuary was sympatric distribution, but their habitat selection and utilization of differences to avoid competition for resources. Effectively ensured to avoid competition and tadpole spawning grounds as a food resource competition.

Mang Mountain National Nature Reserve in Hunan Yizhang Odorrana with flowers Odorrana breeding habitat selection and population dynamics

Abstract

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