FISHING TECHNIQUES AND FOODS OF THE PIED KINGFISHER ON LAKE VICTORIA IN UGANDA

Douthwaite, R. 3. 1976. Fishing techniques and foods of the Pied Kingfisher on Lake Victoria in Uganda. Ostrich 47: 153–160.

Pied Kingfishers fish by diving from hovering flight or from perches; the choice is influenced by location of the prey and the weather, especially wind speed. 40–50% of the dives into Lake Victoria were successful compared with 11% on the Kazinga Channel, near Lake Edward, but dives were made more frequently in the latter area.

Analysis of pellets from the northern shore of Lake Victoria showed the bulk of the adults' diet was composed of Haplochromis, 55–108 mm (median 80 mm) total length, but that Engraulicypris urgenteus. 40–64 mm (median 52 mm) total length was more important numerically. Flying termites, Macrotermes sp., were occasionally eaten in large numbers.

Size selection related to development determines the proportions of Huplochromis and Engraulicypris in the chick's diet. by comparison with the adult most bone consumed by the chick is digested. Two caged juveniles ate about 34.5 g of fresh fish daily, 45% of their post-absorptive weights. Wild birds may consume even more.     

7株绿僵菌防治德国小蠊的毒力筛选

本文用7个绿僵菌(Metarhizium)菌株对德国小蠊Blattella germanica(Linnaeus)进行注射生测,筛选出了一个致病菌株进行五代复壮选育.该株绿僵菌Metarhizium anisopli-ae(Metsch)Sorokin复壮前对雌雄成虫注射生测LD50依次为13.2与8.9天;复壮后对雌雄成虫背部点滴生测12天的LD50值均为1.3×105孢子/虫.通过CP包埋剂制作石蜡切片对僵虫体内菌丝核和体表孢子堆进行了观察.     

热损伤诱导单核细胞株Raw264.7凋亡及其分子机制的初步研究

为探讨热损伤诱导细胞死亡的模式与分子机制,采用流式细胞仪、DNA凝胶电泳、透射电镜观察热损伤诱导单核细胞株Raw264.7凋亡发生的动力学变化及分子机制。结果显示热损伤能显著诱导单核细胞株Raw264.7调亡;有效降低Bcl-2蛋白表达,而上调Bax蛋白表达。这说明细胞凋亡是离体细胞在热损伤作用下重要的死亡方式之一,bcl-2/bax比例减少可能是热损伤诱导单核细胞株Raw264.7细胞凋亡的分子机制之一。     

7. SHORT NOTES

Raseroka, B. H. 1974. Diet of the Hadedah Ibis. Ostrich 45:51-54.

The diet of the Hadedah Ibis in Victoria East, Cape Province is described. 60% of the weight of the diet is composed of animals obtainable from the surface of the soil, indicating that the birds can survive in dry areas where the hardness of the ground would prevent probing for the collection of food.