中国古代养兔发展史     

高玉琪  任战军  建子龙 《经济动物学报》2014,(3):172-177

从化石和历史文献角度概述了我国古今存在的兔种,分析了我国家兔起源驯化过程,并通过历代对兔的记载纵观我国养兔发展,为我国家兔起源及驯化历史提供一定参考依据。  相似文献   

Marine fish life history strategies: applications to fishery management   总被引：4，自引：0，他引：4  

J. R. King  & G. A. McFarlane 《Fisheries Management and Ecology》2003,10(4):249-264

The life history traits of 42 marine fish species were grouped according to the theoretical classifications of life history strategies. This provides a conceptual framework of management options, because life history strategies are the underlying determinants for population responses to climate and ocean changes, they can be used to classify typical population responses. When faced with providing management advice for species for which there is no information on absolute or relative biomass, such as newly exploited species, life history traits can be used to classify the species into a strategist grouping and the appropriate management options can be selected from the conceptual framework.  相似文献   

Early Development of the Mandarinfish, Synchiropus splendidus (Callionymidae), with notes on its Fishery and Potential for Culture     

Yvonne Sadovy  George Mitcheson  Maria B. Rasotto 《Aquarium Sciences and Conservation》2001,3(4):253-263

The mandarinfish, Synchiropus splendidus, is a small, pelagic-spawning enthic dragonet of the western Pacific. Although popular in the marine aquarium trade, little is known of its fishery or biology. All aquarium-trade animals are currently taken from the wild and the impact of heavy collecting is unknown. The specialized and selective nature of the fishery for mandarinfish is described and its potential to disrupt the mating system identified. As a possible alternative to wild capture and as an aid to sustainable exploitation, egg production and early development relevant to mariculture are described, including egg output, embryo, larva and post-settlement development to 30 days, based on live material. Egg output was determined for 40 females and ranged from 12 to 205 eggs. Embryo and larva development were rapid, with settlement occurring within 14 days at 24–26 °C, and at 3.5 mm TL. The swimbladder is retained in adults. Our limited attempts at raising the mandarinfish to settlement were encouraging and suggest an excellent potential for mariculture with implications for both conservation and improved maintenance of fish in captivity. At present, given that this species is difficult to maintain in captivity, it is only suitable for experienced aquarists. Preliminary diet information is provided. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

Ecology of larval blue sucker (Cycleptus elongatus) in the Mississippi River   总被引：1，自引：0，他引：1  

S. R. Adams  M. B. Flinn  B. M. Burr  M. R. Whiles  J. E. Garvey 《Ecology of Freshwater Fish》2006,15(3):291-300

Abstract –  Ecology of larval blue sucker, Cycleptus elongatus , a North American catostomid that has declined throughout its range, is poorly known because larvae have rarely been sampled. A total of 316 young blue suckers (16.0–39.0 mm total length) was captured over 3 years at 14 off-channel sites in Pool 25, Mississippi River. Blue suckers demonstrated distinct temporal and spatial abundance patterns. Blue suckers were only captured in late May/early June, and were more abundant during a year of little flooding. Abundance was correlated with the distance a site was from the main channel, being highest in island borders and island sloughs in proximity to the channel. Fish guts contained a relatively high biomass of chironomids and zooplankton, suggesting islands were providing suitable feeding opportunities. Because of their proximity to flows, slack waters provided by islands were accessible to blue sucker larvae dispersing from channel spawning areas and facilitated their development into rheophilic juveniles.  相似文献   

Life histories of Eucalanus bungii and Neocalanus cristatus (Copepoda: Calanoida) in the western subarctic Pacific Ocean     

ATSUSHI TSUDA  HIROAKI SAITO  HIROMI KASAI 《Fisheries Oceanography》2004,13(S1):10-20

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烟台苹果文化寻根     

赵培策 《中国果菜》2014,(4):69-73

回望一个半世纪烟台苹果的前行脚步,艰难过、辉煌过、迟疑过、跨越过。深浅不一的脚印,串连起延绵不断的文化珍珠。  相似文献   

网络流行文化视域下“90后”大学生价值观教育探析   总被引：1，自引：1，他引：0  

张海霞 《信阳农业高等专科学校学报》2014,(4):25-29

随着信息时代的来临和智能手机的普及,网络流行文化在丰富了"90后"大学生文化生活的同时,也导致了其价值观的模糊化、扭曲化、功利化和世俗化。针对网络流行文化对价值观的影响,我们应该大力弘扬"中国梦"和社会主义核心价值观,坚持思想引领,积极构建"五位一体"大学生价值观教育机制,并借鉴网络流行文化的优势和特点,创新"90后"大学生价值观教育的内容、方法和途径。  相似文献   

孤雌拟长跗摇蚊实验室规模培养技术及生活史研究     

姜永伟  卢雁  丁振军  杜晶  王俊才 《现代农业科技》2014,(5):237-238,240

研究了孤雌拟长跗摇蚊实验室连续规模培养技术,在恒温20、25、28℃条件下对其生活史进行了详细地记录。结果显示:槐叶-黏土培养基适于作为该种摇蚊的食物及筑巢来源。生活史方面,恒温20℃条件下,约25.5 d经历1个世代;恒温25℃,约19.5 d经历1个世代;恒温28℃,约15.5 d经历1个世代。又因该种生物对水质反应敏感,适于作为模式生物进行开发。  相似文献   

正交胶合木应用及发展前景   总被引：1，自引：0，他引：1  

付红梅  王志强 《林业机械与木工设备》2014,(3):4-7,10

介绍了一种新型的工程木产品-正交胶合木的定义、特点、国外发展现状及生产工艺,并指出了正交胶合木在国内的发展前景。  相似文献   

Coexistence of anadromous and lacustrine life histories of the shirauo, Salangichthys microdon   总被引：1，自引：0，他引：1  

T. Arai  H. Hayano  H. Asami  N. Miyazaki 《Fisheries Oceanography》2003,12(2):134-139

The environmental history of the shirauo, Salangichthys microdon, was examined in terms of strontium (Sr) and calcium (Ca) uptake in the otolith, by means of wavelength dispersive X‐ray spectrometry on an electron microprobe. Anadromous and lacustrine type of the shirauo were found to occur sympatric. Otolith Sr concentration or Sr : Ca ratios of anadromous shirauo fluctuated strongly along the life‐history transect in accordance with the migration (habitat) pattern from sea to freshwater. In contrast, the Sr concentration or the Sr : Ca ratios of lacustrine shirauo remained at consistently low levels throughout the otolith. The higher ratios in anadromous shirauo, in the otolith region from the core to 90–230 μm, corresponded to the initial sea‐going period, probably reflecting the ambient salinity or the seawater–freshwater gradient in Sr concentration. The findings clearly indicated that otolith Sr : Ca ratios reflected individual life histories, enabling these anadromous shirauo to be distinguished from lacustrine shirauo.  相似文献