Folia Historico-Naturalia Musei Matraensis - A Mátra Múzeum Természetrajzi Közleményei 6. (1980)

Domokos, T.: Adatok az Anisus vortex L. faj morfometriájához

2. While measuring the radii belonging to the whorls, I observed also the localization and the number of the growth-lines that are to be found on the shells. The appearance of the growth-lines is less characteristic of A. vortex than of A. septemgyratus (Figs. 12, 13; DOMOKOS, 1978). On 72. 4 p.c. of the Balatonmária A. vortex there is no growth-line, while the wrinkle is missing only on 18.6 p.c. of the A. septemgyratus. That can have ecological, genetical reasons. The reason has to be looked for either in the more balanced life condi­tions or in the makings of the species. The comparison is made more difficult by the fact that no or only few samples of A. vortex turned up in the biotope of the studied material of A. septemgyratus. With the Balatonmária individuals the number of growth-lines as well as the whorl-number (WN) of the individuals is higher than in Szántód (Fig. 14). This fact cannot be squared with the facts experienced with. A. septemgyratus. (Here the higher WN-values are attached to smaller of growth-lines; DOMOKOS, 1978.) In an interesting way, the value of the modes that can be read of the polygon (Fig. 14) is smaller than those published by SOÓS (1956). Consequently, further investigations are needed. I should like to thank Mr. LÁSZLÓ PINTÉR and Dr. ANDOR RICH­NO VSZKY for their help they gave me in preparing my paper. Thanks are also due to. Mrs. ÉVA MEGYESI for drawing the fi eures. R(mode) Balaton- ­mária Balatonmária Szántód WN R(mode) Balaton- ­mária Serial number WN R(mode) Balaton- ­mária 1—25 26—50 51—75 76—100 1­-30 31—69 R(mode) Balaton- ­mária Devitations from mode 1.0 1.6 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 0.2 0.3 0.6 0.8 1.2 1.4 1.9 2.1 2.6 3.0 3.8 0.0 0.0 0.0 0.0 -0.1 + 0.1 -0.1 -0.1 + 0.1 0.0 0.0 0.0 + 0.1 0.0 + 0.1 + 0.1 + 0.1 0.0 ().() + 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 <).() 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 + 0.1 -0.1 -0.1 0.0 0.0 0.0 0.0 0.1 + 0.1 0.1 -0.1 0.0 + 0.1 + 0.1 + 0.1 0.1 + 0.2 -0.1 0.0 0.0 + 0.2 0.0 0.0 0.3 -0.4 -0.3 — A year's production of the low shruos. on one hectare area of forest is 161.553 kg organic material. Of this 24.84 % (40.137 kg/ha) is produced by Ligustrum vulgare, 15.81 % (25.546 kg/ha) by Cornus sanguinea, 15.13 % (24.444 kg/ha) by Euonymus verrucosus. The total production of the other species is 71.426 kg/ha (44.22 %). The distribution of the production according to species in shown is Fig. 1. The distribution according to fractions is a follows: foliage represents 63.808 kg/ha (39.50 %), a year old twig 55.377 kg/ha (34.28 %), branch 42,368 kg/ha (26.22 %), x (Fig. 2). A year's old production of the different species was compared with the above­ground phytomass of the same species. The quantity of production generally amounts to 32—85 % of the above-ground phytomass. DOMOKOS, T. : ADATOK AZ ANISUS VORTEX L. FAJ MORFOMETR1ÁJÁHOZ (GASTROPODA: PLANORB1DAE) Az Anisus vortex L. faj sugárirányú növekedése nem logaritmikus spirál, hanem hatványfüggvény szerint történik. 4,5 kanyarulatszámig a 25 egyedes csoportoknál a modusztól az eltérés 5 % körüli érték. Az Anisus vortex-en a növekedési vonalak kisebb számban jelennek meg mint az Anisus septemgyratus-on. 178

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