[Objective] The aim was to study on the feasibility to take Rana cancrivora, the only amphibian inhabiting mangrove, as indicator species for environment monitoring of mangrove. [Methods] Rana cancrivorae were collect...[Objective] The aim was to study on the feasibility to take Rana cancrivora, the only amphibian inhabiting mangrove, as indicator species for environment monitoring of mangrove. [Methods] Rana cancrivorae were collected in July and August of 2009 from two different microhabitats, including the pier and the core mangrove area of National Dongzhai Harbor Mangrove Reserve in Hainan Province. In addition, examination and analysis were conducted on activity of superoxide dismutase （SOD）, catalase （CAT）, acetylcholine esterase （AChE）, and inducible nitric oxide synthase （iNOS）, and content of malonaldehyde （MDA） in its liver and muscle. Furthermore, indices of hepar/body, kidney/body and spleen/body were measured to make a comprehensive evaluation on Rana cancrivora stress from environment and mangrove quality in different microhabitats. [Result] In mangrove habitat, indices of hepar/body, kidney/body and spleen/body of Rana cancrivora were all lower than that in pier and only index of kidney/body differed significantly （P0.05）; the four enzyme activities were all higher than that in pier and activities of SOD and CAT differed significantly （P0.05）. In addition, MDA content was lower than that in pier significantly （P0.05）. The result indicated that antioxidant enzyme activity of Rana cancrivora in mangrove habitat was higher than that in pier individually, lipid peroxidation and the stress were lower correspondingly. [Conclusion] Because of human intervention and travelling development, quality of pier habitat was lower than that in mangrove core area, and stress for Rana cancrivora by environment was smaller than that in pier, correspondingly. Therefore, Rana cancrivora can be the indicator species for environment monitoring of mangrove.展开更多
Age and body size are two important demographic traits that determine the life history strategies of populations and species. We measured these two parameters ofRana amurensis, at a 900 m and a 500 m altitude site in ...Age and body size are two important demographic traits that determine the life history strategies of populations and species. We measured these two parameters ofRana amurensis, at a 900 m and a 500 m altitude site in northeastern China. At the two sites, age at first reproduction was 2 years for males and 3 years for females. The maximum age of males and females at the high-altitude site was 6 and 7 years, and 5 and 7 years at the low-altitude population, respectively. Females were significantly larger than males in both populations, due to greater age in both the high- and low-altitude sites, Body size of either males or fe- males did not differ significantly between populations; only males showed increased body size at the high-altitude site when age effect was statistically controlled for. The increased cline of male body size may be attributable to delayed maturation of the sex due to a shorter growing season at high altitudes展开更多
基金Supported by National Natural Science Foundation of China(40901261)Hainan Natural Science Foundation(808149)+1 种基金Scientific Research Projects of Hainan Higher Education Institute(Hjkj2009-41)National University Student Innovation Program(101165827)~~
文摘[Objective] The aim was to study on the feasibility to take Rana cancrivora, the only amphibian inhabiting mangrove, as indicator species for environment monitoring of mangrove. [Methods] Rana cancrivorae were collected in July and August of 2009 from two different microhabitats, including the pier and the core mangrove area of National Dongzhai Harbor Mangrove Reserve in Hainan Province. In addition, examination and analysis were conducted on activity of superoxide dismutase （SOD）, catalase （CAT）, acetylcholine esterase （AChE）, and inducible nitric oxide synthase （iNOS）, and content of malonaldehyde （MDA） in its liver and muscle. Furthermore, indices of hepar/body, kidney/body and spleen/body were measured to make a comprehensive evaluation on Rana cancrivora stress from environment and mangrove quality in different microhabitats. [Result] In mangrove habitat, indices of hepar/body, kidney/body and spleen/body of Rana cancrivora were all lower than that in pier and only index of kidney/body differed significantly （P0.05）; the four enzyme activities were all higher than that in pier and activities of SOD and CAT differed significantly （P0.05）. In addition, MDA content was lower than that in pier significantly （P0.05）. The result indicated that antioxidant enzyme activity of Rana cancrivora in mangrove habitat was higher than that in pier individually, lipid peroxidation and the stress were lower correspondingly. [Conclusion] Because of human intervention and travelling development, quality of pier habitat was lower than that in mangrove core area, and stress for Rana cancrivora by environment was smaller than that in pier, correspondingly. Therefore, Rana cancrivora can be the indicator species for environment monitoring of mangrove.
文摘Age and body size are two important demographic traits that determine the life history strategies of populations and species. We measured these two parameters ofRana amurensis, at a 900 m and a 500 m altitude site in northeastern China. At the two sites, age at first reproduction was 2 years for males and 3 years for females. The maximum age of males and females at the high-altitude site was 6 and 7 years, and 5 and 7 years at the low-altitude population, respectively. Females were significantly larger than males in both populations, due to greater age in both the high- and low-altitude sites, Body size of either males or fe- males did not differ significantly between populations; only males showed increased body size at the high-altitude site when age effect was statistically controlled for. The increased cline of male body size may be attributable to delayed maturation of the sex due to a shorter growing season at high altitudes
