scholarly journals DISTRIBUTION AND ECOLOGY OF LEECHES (HIRUDINEA) IN BRACKISH WATERS OF THE GERMAN BALTIC

2015 ◽  
Vol 2 (1) ◽  
pp. 42-50
Author(s):  
Uwe Jueg ◽  
Michael L. Zettler

The knowledge about records of leeches (Hirudinea) in Baltic brackish waters of north-east Germany (Mecklenburg-West Pomerania) will be summarized. Observations were made from estuaries of rivers (Stepenitz and Warnow) and lagoons (Darss-Zingst, Stettin) as well in Baltic offshore waters (especially at the Adlergrund/Rønnebank). Altogether 33 taxa are established probably including a new Piscicola species. All species of Glossiphoniidae, Haemopidae and Erpobdellidae could live both in freshwater and oligohaline brackish water up to salinities of 2 psu, few of them even up to 3.6 psu. Only species of the family Piscicolidae are able to penetrate (or to find their optimum?) into mesohaline waters (here up to 13 psu). In the present study several first records for Germany were made in brackish waters (Piscicola kusznierzi, P. elishebae and P. wiktori). Further noteworthy observed species were shortly introduced (Glossiphonia paludosa, Placobdella costata, Italobdella epshteini, Haemopis elegans and Dina apathyi). 7 host fish species could be observed so far.

2015 ◽  
Vol 41 (1) ◽  
pp. 29-42
Author(s):  
Mahiuddin Md Shahjahan Bhuiyan ◽  
Md Redwanur Rahman ◽  
Md Sarwar Jahan ◽  
Minu Haque

A total of 6 species of freshwater mussels under the family Unionidae, order- Unionoida were collected, which are new records for Bangladesh. The information on the distribution and ecology, population density and seasonal variation of Lamellidens phenchooganjensis, L. indawgyiensis, L. generosus, Parreysia (Parreysia) favidens var. assamensis, P. (P.) var. marcens and P. (P.) var. viridula were provided in this paper. Population density and morphometric parameters were measured. Moreover, economic importance and economic role were stated.Bangladesh J. Zool. 41(1): 29-42, 2013


Author(s):  
Harding B. Michel

The global distribution of the 12 described, deep-living megacalanid species is presented in a report on collections made in the Southern Ocean during the United States Antarctic Research Program. Included are four species and one subspecies described in 1967 from samples obtained early in the program. In the material lent to the author by the Smithsonian Oceanographic Sorting Center, only six of the described species were found. Bathycalanus bradyi, common in those samples and elsewhere, is made a synonym of B. richardi. The predominant forms are, in order, B. richardi, Megacalanus princeps, and B. princeps, with Bradycalanus sarsi, B. typicus and B. gigas also present. Knowledge of their distribution and ecology is discussed.


2019 ◽  
pp. 77-94
Author(s):  
I. A. Likhanova ◽  
G. S. Shushpannikova ◽  
L. P. Turubanova

The results of floristic classification of technogenic vegetation (alliance Chamerio angustifolii–Matricarion hookeri A. Ishbirdin et al. 1996, order Chamerio–Betuletalia nanae Khusainov et al. in Sumina 2012, class Matricario–Poetea arcticae A. Ishbirdin in Sumina 2012) conducted by the Braun-Blanquet method (Braun-Blanquet, 1964; Mirkin, Naumova, 1998) are given. 98 geobotanical relevés, made in 1981–2013 on areas of oil fields and suburbs of the Usinsk city (Komi Republic) (56–60о N, 67–66о E), were involved into analysis (Fig. 1). The ecological parameters like moisture (F) and mineral nitrogen soil enrichment (N) were assessed using the Ellenberg ecological scales (Ellenberg, 1974).


2020 ◽  
Vol 1 (2) ◽  
pp. 69-73
Author(s):  
Zaitun Zaitun

This research was conducted to find out how big the interest of tourists who come to visit wajik stalls and sugar cane juice sweet so that in know whether the two places are worthy made in culinary branding in the city of Berastagi tourism. The method used in this research is qualitative method with descriptive research type which explain the actual condition that happened in the field with data collection technique through observation, interview and documentation. Based on the results of the research can be in the know that in general the interest of visitors to enjoy the menu at the stall wajik peceren better in comparison the interest of visitors in sweet sugar cane stalls. The price offered in these two stalls is very relative and classified as not so expensive and visitors who come to stalls wajik peceren usually buy diamonds that are characteristic of the shop to be brought as by the family at home while the visitors who enjoy the menu at the sweet sugar cane where in general, visitors who come only enjoy the menu on offer, especially Berastagi sugar cane and not brought home as souvenir for the family.


Author(s):  
Nicola Clark
Keyword(s):  
The Core ◽  
Made In ◽  

While there were clear strategic aims in the way that marriages were made in the Howard dynasty during this period, the family was only unusual in that it operated at the very top of the aristocratic hierarchy and was therefore able to use marital alliances to successfully recover and bolster both status and finances. Where they were different, however, was in the experience of some of these women within marriage. By and large, the marriages made by and for members of the family, including women, seem to have been as successful as others of their class. However, three women close to the core of the dynasty experienced severe marital problems, even ‘failed’ marriages, almost simultaneously during the 1520s and 1530s. The records generated by these episodes tell us about the way in which the family operated as a whole, and the agency of women in this context, and this chapter therefore reconstructs these disputes for this purpose.


Author(s):  
P. Tongiorgi ◽  
E. Fregni ◽  
M. Balsamo

During 1996–1997 a systematic sampling programme was carried out in brackish coastal lakes and lagoons and in the delta of the River Po. In six of the nine collecting locations, 12 species of Gastrotricha were identified. One species, Chaetonotus ichthydioides, is new to science; another three species, the chaetonotidans Heterolepidoderma foliatum and the macrodasyidans Dendrodasys ponticus and Turbanella cf. pontica, and one macrodasyidan genus, Paradasys (P. subterraneus), were found in Italy for the first time. The unusual morphology of some of the species identified shows that Gastrotricha colonized brackish waters from both marine and freshwater habitats.


1925 ◽  
Vol 15 (3) ◽  
pp. 257-271 ◽  
Author(s):  
James Hendrick ◽  
George Newlands

1. Previous investigations showed that certain Scottish soils were of glacial drift origin, that they were comparatively rich in unweathered silicates and therefore in reserves of plant-food, that they showed considerable variation in such silicates and were capable of classification accordingly. Some indication was also shown that the glacial drift, and hence the resulting soil, was sometimes of local origin, its character being determined by the underlying rock. In the present investigation a more extensive survey of Scottish soils has been made in order to discover to what extent these preliminary findings might be applicable generally.2. For this purpose soils have been collected from various localities in the north, north-east, west and south of Scotland, and have been analysed mechanically and the “fine sand” fraction examined mineralogically.


Plant Disease ◽  
2013 ◽  
Vol 97 (2) ◽  
pp. 168-182 ◽  
Author(s):  
Robert R. Martin ◽  
Stuart MacFarlane ◽  
Sead Sabanadzovic ◽  
Diego Quito ◽  
Bindu Poudel ◽  
...  

Blackberry and raspberry are members of the family Rosaceae. They are classified in the genus Rubus, which comprises hundreds of species and has a center of origin in the Far East. Rubus is divided into 15 subgenera with blackberries classified in the Rubus (formerly Eubatus) and raspberries in the Idaeobatus subgenera. Rubus species are propagated vegetatively and are subject to infection by viruses during development, propagation, and fruit production stages. Reports of initial detection and symptoms of more than 30 viruses, virus-like diseases, and phytoplasmas affecting Rubus spp. were reviewed more than 20 years ago. Since the last review on Rubus viruses, significant progress has been made in the molecular characterization of many of the viruses that infect Rubus spp. Currently, reverse transcription–polymerase chain reaction detection methods are available for most of the viruses known to infect Rubus. The goals of this article are to update the knowledge on previously characterized viruses of Rubus, highlight recently described viruses, review the virus-induced symptoms, describe the advances made in their detection, and discuss our knowledge about several virus complexes that cause serious diseases in Rubus. Virus complexes have been identified recently as the major cause of diseases in blackberries and raspberries.


1973 ◽  
Vol 18 (3) ◽  
pp. 175-183 ◽  
Author(s):  
Nathan B. Epstein ◽  
Duane S. Bishop

In summary, it can be said that progress is being made in the field, but slowly. The ‘art’ is vigorous, vital and exciting. The ranks of family therapists are swelling and they are coming from backgrounds of different theoretical persuasions and with varying degrees of sophistication in their training and education. This mélange does lead to excitement and turbulence but often detracts from the necessary rigour that a scientific discipline must develop in order to reach maturity. Systems theory allows for easy conceptualization of one another's behaviour in the system, and permits a much clearer understanding of the therapeutic process based upon it, in contrast to therapeutic approaches based on other models. The authors found negotiation to be therapeutically effective when made explicit. In addition they place the focus on the ‘here and now’ and encourage the increased labeling by family members of interactions (affective and behavioural) and their effects (affective and behavioural), according to the Family Categories Schema previously referred to. Efforts are directed especially towards dealing with the current resistances to problem solutions. Epstein et al. have reported on an ongoing program of research which attempts to examine the process and outcome of family therapy (7,10,21,22,25,26). What is needed now is a more rigorous approach to research and the development of a necessary theoretical base in order that a more systematic and scientific approach can be developed for treating families.


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