I migliori articoli di acquariofilia. Allestimento acquario dolce e consigli per allevamento di pesci tropicali. La nostra esperienza al tuo servizio!
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Come diceva @MatteoR in un altro topic, a temperature elevate, la crescita è meno accentuata perché il metabolismo aumenta e di tanto.
Mesi, forse un anno
molto interessanteè uno dei miei buoni propositi del 2018!lauretta ha scritto: ↑@Luca.s @Paky non pensate che possa essere utile integrare l'articoloIo Lumache negli acquari di acqua dolce con qualche notizia in più, tratta da questo e dall'altro topic ?
Molto interessante, come temperatura ideale per la crescità indicano infatti 19 o 20.5° a seconda della specie mentre la maggior longevità è stata raggiunta a temperature di 15° e 10°.The survivorships and growth rates ofPlanorbarius corneus and Planorbis planorbis were measured during the whole life span of the snails at constant temperatures of 5, 10, 15, 20 and 25°C. Life expectancy tables were constructed. The maximum longevities for P. corneus (231 weeks) and P. planorbis (175 weeks) occurred at 15°C and 10°C respectively. The extreme temperatures were particularly unfavourable.
Snail growth which was expressed logarithmically was most sensitive to temperature during the exponential stage. However, if we consider a given species duringjts entire life span, there were no significant differences between temperature groups which were in order of decreasing suitability:
—P. corneus: 25, 20 and 15°C; 10°C; 5°C; —P. planorbis: 20 and 15°C; 25 and 10°C; 5°C.
Using the growth constants from the Von Berta-lanffy's model adjusted to give a gaussian curve, it was calculated that the optimum temperatures for the growth of P. planorbis and P. corneus were 19 and 20.5°C respectively. A mathematical model based on spline functions makes it possible to predict the growth of snails over a wide range of temperatures.
BollaPaciuli ha scritto: ↑grazie per avemi segnalato il topic