The relationship among searching efficiency ( e ), the prey density ( n ) and the adult ladybird density ( p ) was simulated as e = 0. 3 1 10 / ( 0. 7842 + 0. 000404 n + 0. 21 58 p ) by beddington ' s model e = at / [ 1 + athn + btw ( p - 1 ) ], i. e. the searching efficiency declined when the adult ladybird and the prey densities increased. in the single predator - two preys system, the selective predation of the adult female beetle to both eggs of b. tabaci and t. nr. fijiensis was discussed when two preys coexisted
當兩種獵物共存時,在不同總獵物密度下,測定了捕食者對各獵物的喜好性和轉換行為,分析了兩種獵物共存時,小
黑瓢蟲雌成蟲對各獵物的功能反應形式,結果表明:當兩種獵物共存時,小
黑瓢蟲雌成蟲對煙粉虱
卵在低密度下不表現喜好性,而在中等密度和高密度下表現正喜好性,對紅蜘蛛
卵在各密度下均不表現喜好性;對煙粉虱
卵的轉換效應會由於總獵物密度的不同而呈現不同的效應,而對紅蜘蛛
卵則在各總獵物密度下均呈現負轉換效應。
According to basic principle and application experience of black light lamp, the trapping lamps were opened out using the principle of wave, color and taste to trap insect pests imago with the electric networks of frequently vibration and high voltages, it can trap many species and amounts of insect pests, reduce amounts of field ovum, greatly reduce insect pests density, save energy, have low lost, little harm to natural enemy and persons and livestock, have remarkable economic, ecological and social efficiency
摘要借鑒
黑光燈的基本原理和應用經驗,再配以頻振高壓電網觸殺的頻振式殺蟲燈,誘集的害蟲種類多、數量大,既大幅度降低了田間落
卵量,又顯著減少了蟲口密度;節能省電,成本低;葉昆蟲天敵殺傷力較小,對人畜安全,不污染環境,具有顯著的經濟、生態和社會效益。
His plan backfired when the massive black dragon deathwing unexpectedly showed up and began stealing alexstrasza ' s eggs
大
黑龍死亡之翼的不期而至和盜
卵行動令他的計劃泡了湯。
See the blackened brooding pouch of this huge - sized rose gold cross back
可有看到這尾巨大玫瑰金過背抹
黑了的孵
卵袋?
Using the vaiety egg ' s color limition of siverworm from romania and the black egg qingsong and by the crossbreeding, the egg ' s color and the egg number of f1, f2, f3 generations, as well as female and male proportion in black or white egg wene nvtigated after the quantity statistical analysis the gene and the gene heredity rule of egg ' s color limition, wene deriked the new system of white egg was kfained
摘要利用羅馬尼亞引進的
卵色限性品種與
黑卵品種菁松,通過雜交育種,調查f1 , f2 , f3代的
卵色及
卵數,以及
黑、白
卵中的雌雄比例,經統計分析確定基因型,查明了
卵色限性基因的遺傳規律,並獲得了新的白
卵系。
The wusuli river group has its stationery tour route, the spawning population wing up heilongjiang river and swims into wusuli river in early may when ice has melt, reproduces during mid june to july in middle part of wusuli river
烏蘇里江種群在烏蘇里江有較穩定的洄遊路線,產
卵群體自5月初解凍后,沿
黑龍江上溯,進入烏蘇里江並沿江上溯, 6月中旬至7月初在烏蘇里江中游產
卵。
Some precipices are hundreds of meters high, as flat as knife - cut, some stone posts pierce into the sky, some are as big as mounds, some are like zhuge liang s eight diagram formations, or taishang laojun in front of a pill oven, or a castle, mushroom, elephant, field, pig and goat, etc. the rocks are ancient, simple and black, giving visitors a feeling of mystery and vastness under such a mysterious atmosphere
有的地方峭壁千仞,如同刀劈斧削,有的石柱直刺青天有的巨石如磐如堵有的形如諸葛亮布的八卦陣有的像太上老君正在煉丹有的像石堡靈芝有的似象駱駝豬羊,危
卵怪石不計其數。石質古樸黝
黑,深沉玄奧,更使人增添了一種神秘和蒼茫之感。
The wintering area of spawning population in the middle of wusuli river may be in the part from tongjiang to qindeli ; the wintering group in the part of wusuli river hulin county might be the premature group
在烏蘇里江中游產
卵的群體的越冬場可能在
黑龍江的同江至勤得利江段,而在烏蘇里江虎林境內越冬的
黑龍江魴可能是未成熟個體。
The resource amount of megalobrama skolkovii dybowsky in wusuli river is about 0. 005 % ~ 0. 01 % of whole spawning amount in heilongjiang
黑龍江魴烏蘇里江種群的資源量大約為魚類產
卵群體的萬分之零點五至萬分之一。
The development process, from fertilized egg to spiracular formation can be divided into 26 stages, took 212. 94 hours under the water temperature of ( 20 0. 5 ) and 170. 95 hours under the natural temperature ( 21. 5 24 ). the external morphological characteristics in various stages of the embryonic development were similar to those of rana nigromaculata, but the hatching stage was later than that of rana nigromaculata and earlier than that of rana limnocharis
自受精
卵期至鰓蓋完成期共分為26個時期,其發育歷程及各時期胚胎外形特徵與
黑斑蛙基本相似,但孵化期比
黑斑蛙推遲三個胚期而早於澤蛙,在水溫( 20 0 . 5 )及常溫( 21 . 5 24 )條件下,其胚胎發育的全時程分別為212 . 94小時和170 . 95小時。
Effects of metformin on the polycystic ovary syndrome with pseudoacanthosis nigricans and insulin resistance
二甲雙胍對多囊
卵巢綜合征伴假性
黑棘皮病和胰島素抵抗的作用
Developmental grade of pupae and eggs of white fly, aleurocanthus spiniferus, in relation to its optimum control period of the pest in tea garden
茶
黑刺粉虱蛹和
卵的發育分級及與其防治適期的相關性
Survivors were at increased risk for stomach cancer, colorectal cancer, lung cancer, soft tissue sarcoma, melanoma, non - melanoma skin cancer, endometrial cancer, ovarian cancer, renal cancer, thyroid cancer, and leukemia
她們患上胃癌直腸癌肺癌軟組織肉瘤惡性
黑色素瘤及其它種類的皮膚癌子宮內膜癌
卵巢癌腎癌甲狀腺癌以及白血病的可能性均會有所增加。
This paper discusses on some important progresses obtained in the field of life science such as the newly developed pharmaceutics making people rejuvenated, the first case that the mammals give birth to its own clonal baby, the reproductive biological techniques with the characteristics of ooplasm substitution, the research on the measurement of human genome sequence, the activation of melanocyte changing the white hairs into the black ones, and the research on rice cytology, etc
論述了使人變得年輕的制劑、世界第一例哺乳動物生下自己的克隆體、以卵漿置換為特徵的生殖生物學技術、人類基因組測序研究、激活黑素細胞使白發變黑發以及水稻細胞學研究取得的重大進展,並闡述了其生物學意義和應用價值。