AN ANALYSIS OF RELATIVE FATNESS OF THE CAPE HARE( LEPUS CAPENSIS)

Ｂｏｄｙｃｏｎｄｉｔｉｏｎｉｓｏｎｅｏｆｔｈｅｉｎｄｉｃａｔｏｒｓｏｆｗｉｌｄｌｉｆｅｐｏｐｕｌａｔｉｏｎｓｔａｔｕｓ.Ｋｉｄｎｅｙｆａｔｉｎｄｅｘ[1 ] ａｎｄｗｅｉｇｈｔ ｌｅｎｇｔｈｉｎｄｅｘ (ｂｏｄｙｗｅｉｇｈｔａｇａｉｎｓｔｃｕｂｅｂｏｄｙｌｅｎｇｔｈ) [2 ] ａｒｅｔｗｏｃｏｍｍｏｎｉｎｄｉｃａｔｏｒｓｆｏｒｓｐｅｃｉｅｓｏｆｌａｇｏｍｏｒｐｈ .Ｔｈｅｌａｔｔｅｒｉｓｍｏｒｅｃｏｎｖｅｎｉｅｎｔｔｏｍｅａｓｕｒｅｉｎｇａｍｅｍａｎａｇｅｍｅｎｔｐｒａｃｔｉｃｅ.Ｔｈｉｓｐａｐｅｒａｎａｌｙｚ…     

AN ANALYSIS OF RELATIVE FATNESS OF THE CAPE HARE（LEPUS CAPENSIS）

Body condition is one of the indicators of wildlife population status. Kidney fat index[1] and weight-length index (body weight against cube body length)[2] are two common indicators for species of lagomorph. The latter is more convenient to measure in game management practice. This paper analyzed relative fatness (RF) of the cape hare( Lepus capensis) one of the most important game animals in China.     

塔里木兔年龄鉴定指标的研究

本文对塔里木兔的体重、体长、颅全长、颧宽、门齿孔长、下颌骨长和晶体干重等７项生长指标进行了主分量分析,确定了各项指标在年龄鉴定价值上的排序,结果显示用颅全长（因子负荷量０．９８）鉴定塔里木兔的年龄比较合理。     

鸭绿江细鳞鱼的生物学

细鳞鱼是鸭绿江的重要经济鱼类。幽门垂数、鳃耙数及侧线鳞数与国内其他产地相比呈现明显交叉。支流十三道沟河口以上的5公里江段为主要产卵场。产卵期为4—5月,盛期4月末。成熟个体多数4龄,最小成熟雌鱼体长309毫米。体长285—438毫米,体重315—1098克的个体绝对怀卵量1629至3119(平均2194),与体长L的关系式N=9.54924 L-1297.3246,与体重W的关系式N=2.2207W 641.6345。卵径3.5—4.0毫米。水温5.3—9.0℃时,受精后625小时孵出。用鳞片测定年龄及生长。3龄鱼体长可达356毫米,5龄鱼体长一般为389毫米。体长与体重的关系式W_(?)=0.002486L~(2.9146),W_♀=0.004509L~(2.8978)。     

THE OCCURRENCE OF PHYTOSEIULUS PERSIMILIS ATHIAS-HENRIOT (ACARINA:PHYTOSEIIDAE) IN AN ORCHARD IN VICTORIA

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High numbers of the predatory mite, Phytoseiulus persimilis , were found on apple and nectarine trees in a commercial orchard at Werribee, Victoria in February 1981. In the following season, again it was not detected on trees or broad-leaved weeds in the orchard until late summer. Slide-dip tests on the Werribee population of P. persimilis and a population originating from strawberries in Sydney, New South Wales, showed that azinphos-methyl was equally toxic to the 2 strains and DDT was considerably less toxic to both.     

刺猬冬眠过程中褐色脂肪和非颤抖性产热研究

本文对刺猬在冬眠过程中褐色脂肪（ＢＡＴ）的相对重量、超微结构和非颤抖性产热（ＮＳＴ）的变化进行了测定,探讨了ＢＡＴ产热在热在冬眠刺猬醒眠过程中的作用。结果表明,夏季（７月份）刺猬的ＢＡＴ相对重量最低,为０．２３％。秋季迅速增加,至入眠前达到最高,为０、４６％。冬眠期中缓慢减少,冬眠后显著下降（０．３２％）,这与醒眠时需要快速产热密切相关。冬眠前和冬眠中刺猬的ＢＴＡ脂滴和线粒体嵴数量明显高于冬眠后,     

THE METABOLISM OF TRITIATED DOPAMINE IN REGIONS OF THE RAT BRAIN IN VIVO—I

Abstract— A simple combination of acid- and base-exchange resin columns enabled a more complete separation of amine, acid and neutral metabolites of catecholamines from individual small brain samples to be made. Fractions containing individual catecholamines or metabolites were obtained in aqueous eluates suitable for fluorimetric or radioisotopic analysis. With consistent intraventricular injection and brain dissection techniques, this separation method enables a study of the metabolism of catecholamines in regions of the rat brain and the effects of drugs on this metabolism.     

SEASONAL CYCLE AND POPULATION DYNAMICS OF THE SEA HARE APLYSIA OCULIFERA IN THE NORTHERN GULF OF EILAT (AQABA), RED SEA

Populations of the sea hare, Aplysia oculifera (Adams &Reeve, 1850) (Gastropoda: Opistho-branchia), were studied inthe northern coast of the Gulf of Eilat (Aqaba) between April1988 and March 1992. Recruitment occurred from December to February,synchronized with the blooming of green algae (Enteromorphaintestinalis and Ulva sp.). A single recruitment event occurredeach year, while a secondary recruitment was rarely, observedand was related to acute catastrophic disturbance of the habitat.Adult sea hares inhabited the inter- and subtidal zones fromDecember-January to April-June, feeding on E. intestinalis andUlva sp. Populations disappeared in April-June which coincidedwith disappearance of these green algae. Mean maximum body livemass of adult sea hares (MMBLM, that is the highest mean bodymass recorded at specific site within the season) ranged from0.77 to 33 g MMBLM, varied significantly among populations inhabitingthe various study sites, and was significantly and inverselycorrelated with water movement intensity. Abundance of sea haresvaried among sites and among years and was related to the amountof green algae during the recruitment season. ²Present address: Department of Biology, University of Haifaat Oranim, Tivon 36006, Israel. E-mail: plaut{at}research.haifa.ac.il (Received 29 April 1997; accepted 26 July 1997)     

ANATOMY OF THE GYNOECIUM IN TWO SPECIES OF BAKERIDESIA (MALVACEAE)

Structure of the gynoecium is described in two species of Bakeridesia, subgenus Bakeridesia (Malvaceae, tribe Malveae). The dorsal wall of each carpel bears a winglike projection with a marginal pair of pubescent, bluntly dentate wings. The projection arises as a single, solid ridge of tissue after the ovules are initiated and after the ventral carpellary margins are fused with the receptacle. Two multiseriate layers of fiber-sclereids line each locule and continue into the winglike projection where they are separated by parenchyma. Gynoecial vascularization is described in detail. The richly vascularized carpels are supplied by five traces: a median dorsal trace, which bifurcates into two dorsal bundles; two lateral traces; and two ventral traces. Adjacent ventral traces, lateral traces, and septal bundles are fused—i.e., they are held in common by neighboring carpels. The presence of lateral carpellary traces may be a primitive character in the tribe Malveae.     

REGIONS OF CELL WALL EXPANSION IN THE PROTONEMA OF A FERN

Protonemata of Onoclea sensibilis were grown for 7 days in darkness and were then transferred into light on new media, either liquid or agar-solidified, which contained 0.15% colchicine. The growth of individual plants was observed on solid media in microchambers. Unequivocal evidence was obtained that cell wall expansion and an increase in cell diameter occurred in regions well behind the apex of the protonema. This finding is related to an hypothesis which proposes light-induced changes in microtubule orientation and cell wall structure as an explanation for certain changes in cell form in fern gametophytes.     

LIMITATIONS OF PHOTOSYNTHESIS IN DIFFERENT REGIONS OF THE ZEA MAYS LEAF

The progressive development of the photosynthetic apparatus occurring along the length of the Zea mays leaf offers a convenient system with which to examine the limitations to photosynthetic CO₂ assimilation during biogenesis of a C₄ leaf. Changes in light-induced O₂ evolution and CO₂ assimilation, chlorophyll content, activity of PEP-carboxylase, NADP-malic enzyme and the 'R5P system' (consisting of d -ribose-5-phosphate-keto isomerase, ATP- d -ribulose-5 phosphate 1-phosphotransferase and d -ribulose-1,5-bisphosphate carboxylase) and fluorescence emission characteristics were examined along the length of the second leaf of 7-day-old plants grown under a diurnal light regime. The results suggest that the major limitation to CO₂ assimilation in the leaf sheath lies within the chlorenchyma and is either energy supply for carboxylation or the capacity of key photosynthetic enzymes. In the leaf blade stomatal resistance to CO₂ diffusion constitutes a major fraction of the total leaf resistance to CO₂ assimilation implicating the stoma as the major limiting factor to photosynthetic CO₂ assimilation.     

THE OCCURRENCE OF CERTAIN MOSQUITO SPECIES UNDER SEVERE DROUGHT CONDITIONS IN THE SOUTHERN WIMMERA OF VICTORIA

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During severe drought in the southern Wimmera, mosquito occurrence was severely restricted or stopped at all sites except permanent springs. Salting of creeks and trampling of dam margins by stock appeared to play a significant role.