解语终须累尔身——谈林黛玉所养鹦鹉之深层意味

黛玉驯养的鹦鹉实是曹雪芹有意为之,借着鹦鹉意象在古典诗词中所具有的"贮以金笼"、"远别故乡"、"巧言遭忌"的意蕴,缓慢而隐蔽地暗示林黛玉的孤寂性格和悲剧命运。     

鹦鹉舌下神经气管鸣管支运动核团的定位

用辣根过氧化物酶（ＨＲＰ）逆行示踪技术，对澳洲鹦鹉舌下神经气管鸣管支（ＮＸⅡｔｓ）延髓运动团进行定位研究，结果显示在ＮＸⅡｔｓ和上颈肌注射ＣＴＢ－ＨＲＰ后，逆标细胞出现在舌下神经核气管鸣管亚核（ｎＸⅡｔｓ）、舌咽－迷走背运动核（ｎⅨ－Ｘ）、上脊髓核（ＳＳＰ）和颈静脉神经节（ｊｕｇ·ｇｇｌ）。ｎＸⅡｔｓ对ＮＸⅡｔｓ的支配是双侧性的（同侧为主）。这些结果表明，ＮＸⅡｔｓ兼有发声运动和感觉传入双重功能。     

Diet and feeding behaviour of the Neotropical parrot snake (Leptophis ahaetulla) in northern Brazil

Specimens (289) of Leptophis ahaetulla from northern Brazil and western Maranhão were examined for the composition of stomach contents. Most prey items were tree frogs, especially those of the family Hylidae (90%). Most of the anurans identified belong to the Scinax ruber species group (27%) and Scinax sp. (25%). Prey size was significantly related to snake length but not to head length. There was no significant difference related to sex in either case. Both sexes preyed on small to medium‐sized items (3–10% of snake snout–vent length). Leptophis ahaetulla seems to manipulate captured prey before ingestion since most of the prey items (83.6%) were swallowed head‐first. Leptophis ahaetulla is primarily diurnal and semi‐arboreal, inhabits disturbed and undisturbed forest, and forages primarily on the ground and in fallen vegetation, where its prey items are likely to be found at rest.