胶东海岸的沙生植被

胶东半岛位于山东省东部,地处黄、渤海之滨,陆地海岸线全长1668.58km,占山东省陆地海岸线总长的一半以上。海岸地理位置约当北纬36°15′42″—38°24′00″,东经119°33′00″—122°42′18″之间,属暖温带生     

浙江近海后鳃类软体动物的分布及其区系

报道了浙江近海的后鳃类97种,分别隶属于7目30科44属。其中我国沿岸广温广布种14种,主要分布于东海和南海的亚热带种50种,南海的热带种18种,渤、黄海延伸到东海北部的暖温带种15种。     

The role of Callionymus lyra and C. reticulates in the life cycle of Lernaeocera lusci in Belgian coastal waters (Southern Bight of the North Sea)

A survey of the dragonet Callionymus lyra and the reticulated dragonet C. reticulatus from Belgian coastal waters (Southern Bight of the North Sea) in June 1991 revealed 34% of dragonets infected with 1–7 Lernaeocera lusci. This same parasite infected 9% of the reticulated dragonets (mean intensity =1). Parasite size is host-size-dependent. Of the parasites collected from C, lyra 64% were gravid adults (substage X), and a significant positive relationship between the number of eggs and axial length of the parasite was found. The parasites were overdispersed within the dragonet population ( s ²/ m =1.67)     

Flume length and post‐exercise impingement affect anaerobic metabolism in brook charr Salvelinus fontinalis

The effect of flume length and impingement time on post‐exercise lactate concentrations in brook charr Salvelinus fontinalis were examined. Swimming in longer flumes increased lactate concentrations, as does impingement after swimming in short flumes.     

Dendrochronological dating and provenance determination of a 19th century whaler in Patagonia (Puerto Madryn,Argentina)

Dendrochronological methods have been widely used to determine the date of construction and provenance of shipwrecks. Despite a large number of shipwrecks, the application of dendroarchaeological techniques is relatively incipient in the coasts of South America. This paper presents the results of a dendroarchaeological study conducted at the shipwreck site "Bahía Galenses" (BG), located in the western sector of Golfo Nuevo, on the Patagonian coast of the South Atlantic Ocean. Based on previous archaeological research, two hypotheses were tested in this study. First, the wreck described in the BG 2 sub-site corresponds to a mid-19th-century whaler built in the northeastern US. Second, these remains correspond to the Dolphin, a northeastern American whaler built in Warren (Rhode Island) in 1850 and shipwrecked in the Atlantic coast of Patagonia in 1859. Using dendroarchaeological provenance methods and a novel approach based on the gridded North American Drought Atlas, we found highly significant correlations between the wreck's tree-ring width series and white oak and yellow pine tree-ring reference chronologies from the eastern US. The latest non-cutting dates obtained in this analysis correspond to the year 1849. To our knowledge, our study pioneered the use of dendrochronological methods for dating and establishing the provenance of a whaler's remains on the Atlantic coast of South America and encourages the feasibility for future dendroarchaeological research based on the large number of wooden shipwrecks that occurred in the region.     

Use of a multivariate model using allele frequency distributions to analyse patterns of genetic differentiation among populations

Very few studies have attempted to relate the properties of some ordination techniques to classical tools of population genetics as F -statistics. A multivariate model to analyse population genetics data based on the properties of 'joint scaling' of populations and loci is developed. The design of population genetics data means that this model deals with a modified version of the classical Multiple Correspondence Analysis which is called Constant Row Total-Multiple Correspondence Analysis (CRT-MCA) and is an original tool in population genetics. Such a model allows estimates of the degree of population differentiation by studying the variability of the distribution of allele frequencies in different samples. Some clear relationships exist between some model parameters and the classical F_st statistics. The CRT-MCA also allows all the studied loci to be considered simultaneously and the role of each locus in patterns of population differentiation to be expressed. Such a multivariate approach prevents the use of any pooling strategy as is classically used in studies of hierarchical F -statistics. The relevance of the CRT-MCA model is illustrated by the analysis of population structure of 15 dogwhelk ( Nucella lapillus ) populations in south-west England. The advantages and limitations of CRT-MCA are presented.     

The distribution of brackish water Calanoida (Copepoda) along the coasts of Brazil

The distribution of 18 species of Calanoida Copepoda found in the estuaries of the Brazilian coast is analyzed. A slight tendency of a latitudinal decrease in diversity, from North to South is found. Salinity ranges from the different species are discussed and in some cases interspecific vicariance patterns are found. Two basic types of estuaries of the Brazilian coast are characterized on the basis of environmental parameters and population dynamics.     

Respiration rates predict differences in growth of coast redwood

The relation between growth rate traits (height, basal diameter, stem volume and branch diameter) and two measures of respiration rate [metabolic heat rate (q) and CO₂ production rate (Rco₂)] and their ratio (q/R_co2) was examined on a collection of 192 different genotypes of coast redwoods [Sequoia sempervirens (D.Don) Endl.]. Branch diameter was not correlated with any of the respiratory measures, but the other three growth traits gave highly significant (P < 0.001) correlations with positive slopes. Combining the four growth traits and the three respiratory variables (q, R_Co₂ and q/R_co2) to give two canonical variates, one representing growth and one representing respiration, gives an even stronger linear correlation (r= 0–85). These data suggest that simultaneous assay of multiple respiratory measures on juvenile trees can be used to predict their longer-term growth rates.