河南省三门峡鱼里铝土矿床地质特征及控矿因素分析

鱼里铝土矿床赋存于晚石炭世本溪组碳酸盐岩不整合面上,严格受沉积间断面控制,为一套含铁富铝的铁铝质黏土岩组合。矿体规模为中型,呈层状、似层状,局部透镜状,矿石构造类型为碎屑状、砂(粒)状、蜂窝状、豆鲕状及致密块状,矿物成分以一水硬铝石为主,有害元素少,并伴生镓元素。潟湖—沼泽环境是铝土矿形成的有利条件,矿体的形态、产状和厚度受古地形的控制,与含矿岩系的厚度正相关,大厚度的含矿岩系基本上是在溶岩洼地中产生的,含矿岩系厚度大的地段往往伴随着高质量和大厚度的铝土矿。

浅谈三门峡鱼里铝土矿地质特征

三门峡市陕州区鱼里铝土矿位于河南省主要富铝土矿成矿带之一的豫西陕县-新安铝土矿成矿区,成矿地质条件良好。笔者通过对矿床地质特征、矿石特征、物质组分的分析,初步探讨了矿床成因。

Otolith shape analysis for stock discrimination of two Collichthys genus croaker(Pieces:Sciaenidae,)from the northern Chinese coast

The otolith morphology of two croaker species(C ollichthys lucidus and C ollichthys niveatus) from three areas(Liaodong Bay, LD; Huanghe(Yellow) River estuary, HRE; Jiaozhou Bay, JZ) along the northern Chinese coast were investigated for species identifi cation and stock discrimination. The otolith contour shape described by elliptic Fourier coefficients(EFC) were analysed using principal components analysis(PCA) and stepwise canonical discriminant analysis(CDA) to identify species and stocks. The two species were well dif ferentiated, with an overall classifi cation success rate of 97.8%. And variations in the otolith shapes were significant enough to discriminate among the three geographical samples of C. lucidus(67.7%) or C. niveatus(65.2%). Relatively high mis-assignment occurred between the geographically adjacent LD and HRE samples, which implied that individual mixing may exist between the two samples. This study yielded information complementary to that derived from genetic studies and provided information for assessing the stock structure of C. lucidus and C. niveatus in the Bohai Sea and the Yellow Sea.

Study of Caspian Goby Neogobius sp. Karyotype Flexibility from Several Biotops

The karyotype of Caspian goby was studied, which has been identified as Caspian bighead goby-Neogobius gorlap before. The results of cytogenetic analyses have shown that the diploid set of goby varies from 38 to 40 chromosomes, which is different from bighead goby （2n = 43-46）. We assumed that Caspian goby has independence as a species.

Influence of Frozen Storage Time on Unsaturated Fatty Acids and Proximate Composition of Caspian Sea White Fish （Rutilus frisii kutum） Fillets

The main aim of this research was to identify fatty acids composition of Caspian Sea of white fish Rutilusfrisii kutum tissue and their changes during 12 months storage （-18 ℃ ）. The results showed, UFA （Unsaturated Fatty Acid） and SFA （Saturated Fatty Acid） were 74/09 and 21/63%, respectively in fresh tissue. So that, DHA （C22：6） oleic acid （C 18：1c） had high amounts （15/07, 20/57） UFA and palmitic acid （C16：0） was the most （13/09%） SFA. The effects of freezing on fish tissue showed that UFA and SFA contents have reached to 58/79 and 22/17%, respectively at the end of cold storage. Also ω-3 and ω-6 series of fatty acids was 24/22 and 15/56% in fresh tissue, but their contents decreased to 8/68 and 5/11% at the end of period. Among, the fatty acids C22：6, C 18：1 c and C 16：0 had the most changes. The changes of fatty acids were significantly at 95% level expected for C18：0.

Integrated Water Resources Management for Pond in Bistrica E Pejes

In this century of crisis in water and energy the problem of water resources development is very crucial, especially in countries like Kosova with relatively scarce water resources. In this context the use of water for the production of hydro-energy is essential. Actually the energetic system of Kosova is based on thermo-energy, so the use of water resources for the production of hydro energy will increase further the energy production of the country. On the other hand, a master plan of multiple use of water resources, based on the principle of integrated and sustainable management, will insure better services for other users of the country. There are four basins in Kosovo： basin of the Drini i Bardhe River, basin of Ibar River, basin of Morava e Bing^s and Lepenci Rivers. The watershed of Bistrica e Pejes belongs to the basin of Drini i Bardhe, which belongs to the Adriatic Sea catchment. It has an admirable capacity therefore should be treated as a complex capacity, in which important economic components of water can be introduced such as： drinking water supply, water for irrigation in both sides of valley, fish economy and recreation, hydro-energy etc..

An examination of the population dynamics of syngnathid fishes within Tampa Bay,Florida,USA

Seagrass ecosystems worldwide have been declining, leading to a decrease in associated fish populations, especially those with low mobility such as syngnathids （pipefish and seahorses）. This two-year pilot study investigated seasonal patterns in density, growth, site fidelity, and population dynamics of Tampa Bay （FL） syngnathid fishes at a site adjacent to two marinas under construction. Using a modified mark-recapture technique, fish were collected periodically from three closely located sites that varied in seagrass species （Thalassia spp., Syringodium spp., and mixed-grass sites） and their distance from open water, but had consistent physical/chemical environmental characteristics. Fish were marked, photographed for body size and gender measurements, and released the same day at the capture site. Of the 5695 individuals surveyed, 49 individuals were recaptured, indicating a large, flexible population. Population density peaks were observed in July of both years, with low densities in late winter and late summer. Spatially, syngnathid densities were highest closest to the mouth of the bay and lowest near the shoreline. Seven species of syngnathid fishes were observed, and species-specific patterns of seagrass use emerged during the study. However, only two species, Syngnathus scovelli and Hippoeampus zosterae, were observed at high frequencies. For these two species, body size decreased across the study period, but while S. scovelli＇s population density decreased, H. zosterae＇s increased. Across six of the seven species, population size declined over the course of this preliminary study; however, seasonal shifts were impossible to distinguish from potential anthropogenic effects of construction [Current Zoology 56 （1）： 118-133, 2010].

Life history pattern of mosquitofish Gambusia holbrooki (Girard, 1859) in the Tajan River (Southern Caspian Sea to Iran)

Investigation of the ecology of introduced species in new habitats can allow determinations of the degree, direction, and rate of evolutionary change. The introduction of Gambusia holbrooki in the southern Caspian Sea presents such a situation. We evaluated the life history traits of mosquitofish in the Tajan River basin. A total of 744 G. holbrooki specimens were collected between January and December 2008. The maximum observed ages are 0+ years for males and 1+ years for females. Both sexes grew allometrically (negative for males: b=2.442 and positive for females: b=3.232). The overall sex ratio is unbalanced and dominated by females. GSI values suggest that this population of G. holbrooki matures between February–July. The highest mean GSI value is 1.80 for males and 15.97 for females in May. Egg diameter ranges from 1.00 to 3.00 mm with a mean value of 2.098 mm. Absolute fecundity varied from 7 to 57 eggs. Both ova diameter and absolute fecundity were positively correlated to fish size (length and weight). Fecundity relative to total weight fluctuated from 34.44 to 582.64 eggs/g, and to total length from 2.33 to 12.95 eggs/cm. Both were negatively correlated with female size. The characteristics of this population are important with respect to life history of the species.

Landmark learning by the Ozark zigzag salamander Plethodon angusticlavius

Although salamanders have been shown to respond to classical conditioning, spatial learning has been largely unstudied. We tested whether salamanders could learn to locate foraging areas by using landmarks. We trained 10 salamanders Plethodon angusticlavius to use landmarks （small rocks） to locate patches within the arena containing food （blackworms Lumbriculus variegatus）. At the comers of each square testing arena were four plastic dishes, one containing blackworms and the other three empty. A rock was placed in front of the dish containing blackworms, and the location of the food-dish was randomly chosen for each training trial. A control group was also trained to feed on blackworms in the presence of a rock, but the rock was positioned randomly among the four dish locations so that the rock was not a reliable landmark for the worms. Although the length of the training period for individual salamanders varied （22-38 trainings per individual）, the mean number of trainings for salamanders in the control and experimental groups was equal （30 training trials）. During testing, no blackworms were present to eliminate any visual or chemical cues emanating directly from the prey. Individuals trained with the rock landmarks spent sig- nificantly more time in the area of the landmark than did control salamanders [Current Zoology 57 （4）： 485-490, 2011].