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Plankton larvae of invertebrates as an indicator of potential capacity for regeneration of bottom filtra-tor communities in the Gulf of Gdansk

100%

Wolska-Pys M.

Oceanological Studies

1998

tom 27

nr 4

93-103

In autumn 1994 and summer 1995, the occurrence of larvae of bottom invertebrates was investigated in the coastal waters of the Gulf of Gdansk. The determined abundance of larval stages of molluscs and barnacles suggested that in spite of pollution of the environment the biofiltrator communities in the Gulf have a great potential for regeneration and development. Several areas with potentially best conditions for growth, characterised by highest quantities of the larvae, and especially by a high percentage of large larvae just before their transformation into settled forms, were selected. Bio-technical measures to increase the rates of growth and to facilitate processes of self-purification in the water body are proposed.

Ultrastructure of haemocytes present during flight muscle differentiation of Melipona quadrifasciata anthidioides, Lepidoptera (Hymenoptera, Apidae, Meliponinae)

100%

Da_Cruz-Landim C.

Folia Biologica

1996

tom 44

79-84

The present work deals with the ultrastructure of the haemocytes present in the dorsal thoracic region of larvae and pre-pupae of Melipona quadrifasciata anthidioides. This is a region of intense muscular differentiation in this phase of life of the insect. Only plasmatocytes, granulocytes, and adipohaemocytes were found in this area, all showing signs of being intermediate forms

Anisakis simplex (Rud., 1809) (Nematoda: Anisakidae): growth and morphometry of larvae from spring spawning herring (Clupea harengus membras L.) in the Vistula lagoon and adjacent areas of the Baltic Sea

100%

Shukhgalter O.

Oceanological Studies

2002

tom 31

nr 1-2

67-73

Third-stage A. simplex larvae are described infesting baltic herring in the Vistula Lagoon and adjacent areas of the Baltic Sea (ICES-subdivisions 26). Morphometric measurements and peculiarities of allometric growth of A. simplex larvae are similar to those found as larvae of fishes in other regions, range size was wider. Growth of A. simplex larvae during spawning migration of their hosts was noted. High infestation (up to 375 specimens per fish) and the wide size range of larvae (8.0-30.0 mm) confirms that the third-stage A. simplex larvae stay alive in their hosts and increase over time.

Biocidal activity of Bacillus species for Anopheles larvae

88%

Shakoori A. R. , Anwar S. , Khurshed N. , Haq R. U. , Haq R. U. , Shakoori A. R.

Folia Biologica

1999

tom 47

nr 3-4

143-148

It is generally accepted that Bacillus thuringiensis (B.t.) is specifically toxic to some insects but does not pose any threat to the environment, operators, or consumers. There are several other Bacillus species which can be used as effective bioinsecticides. In this study four different species of Bacillus, i.e., B. coagulans, B. megaterium, B. brevis, and B. sphaericus were isolated from soil samples collected from Kala Shah Kakoo and Kasur areas, in the suburbs of Lahore. Isolated Bacillus species were administered to mosquito larvae to evaluate their biocidal activity. B. coagulans I from Kala Shah Kakoo showed 93% mortality, while B. coagulans III from Kasur showed 70% mortality. Bacterial isolates most toxic to Anopheles larvae showed optimum growth at 37 ?C and pH 7. These isolates have a great potentcy to controlling anopheline population.