排序方式： 共有5条查询结果，搜索用时 0 毫秒
1
1.
Leopards (Panthera pardus) are endangered in South East Asia yet little is known about which resources need to be secured for their long-term conservation or what numbers of this species this region can support. This study uses radio telemetry to investigate seasonal variation in habitat selection and home range size of Leopards in Huai Kha Khaeng Wildlife Sanctuary, Thailand. Over a five year period, 3690 locations were recorded from nine individuals. The mean ± standard error of fixed kernel home range size for six adult females was 26 ± 8.2 km2, for two adult males was 45.7 ± 14.8 and for two sub-adult females was 29 km2 ± 5.5. Adult female wet and dry season home range sizes did not differ significantly. One adult male showed an increase in home range size from dry to wet seasons. Estimated density was 7 adult females/100 km2, which suggests 195 adult female leopards living in Huai Kha Khaeng alone, thus highlighting the larger Western Forest Complex’s potential contribution to leopard conservation. Compositional analysis of second and third order habitat selection suggested mixed deciduous and dry evergreen forest types, flat slope and areas close to stream channels are important landscape features for leopards. These results can help formulate a much needed conservation strategy for leopards in the region. 相似文献
2.
The effects of fortifying a diet with L‐lysine HCl (Lys) and L‐arginine (Arg) in broilers housed under conditions of high stock density, were studied in an experiment that measured bodyweight, feed intake, feed conversion, body temperature, serum protein, immune parameters and neutrophils. A diet fortified with Lys and Arg increased bodyweight gain in broilers housed under high stock density conditions, but not in normally housed controls. The diet fortified with Lys and Arg decreased the feed conversion ratio and abdominal fat, as compared to the effects of a control diet, without regard to housing conditions. No effects of amino acid fortification or stock density on body temperature, serum protein or immune parameters were recorded. The results indicate that an increase in the dietary supply of Lys and Arg is beneficial to broilers during stressful conditions of high stock density, potentially contributing to an enhancement of animal welfare in broiler farms. 相似文献
3.
Nobsathian Saksit Saiyaitong Chatwadee Koul Opender Pluempanupat Wanchai Bullangpoti Vasakorn Kumrungsee Nutchaya 《Phytoparasitica》2021,49(4):659-673
Phytoparasitica - The dried twigs of Piper ribesioides were used to prepare various extracts in different solvents. Each extract was evaluated for their toxicity against 2nd instar larvae of... 相似文献
4.
Chotichayapong C Wiengsamut K Chanthai S Sattayasai N Tamiya T Kanzawa N Tsuchiya T 《Fish physiology and biochemistry》2012,38(5):1533-1543
Myoglobin from Asian swamp eel Monopterus albus was purified from fish muscle using salt fractionation followed by column chromatography and molecular filtration. The purified Mb of 0.68?mg/g wet weight of muscle was determined for its molecular mass by MALDI-TOF-MS to be 15,525.18?Da. Using isoelectric focusing technique, the purified Mb showed two derivatives with pI of 6.40 and 7.12. Six peptide fragments of this protein identified by LC-MS/MS were homologous to Mbs of sea raven Hemitripterus americanus, yellowfin tuna Thunnus albacores, blue marlin Makaira nigicans, common carp Cyprinus carpio, and goldfish Carassius auratus. According to the Mb denaturation, the swamp eel Mb had thermal stability higher than walking catfish Clarias batrachus Mb and striped catfish Pangasius hypophthalmus Mb, between 30 and 60?(°)C. For the thermal stability of Mb, the swamp eel Mb showed a biphasic behavior due to the O(2) dissociation and the heme orientation disorder, with the lowest increase in both Kd(f) and Kd(s). The thermal sensitivity of swamp eel Mb was lower than those of the other Mbs for both of fast and slow reaction stages. These results suggest that the swamp eel Mb globin structure is thermally stable, which is consistent with heat-tolerant behavior of the swamp eel particularly in drought habitat. 相似文献
5.
1