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Influence of temperature on the hatching of eggs of Diplectanum aequans,a parasite of sea bass
Authors:Stefano Cecchini
Institution:(1) Dipartimento di Patologia Animale, Profilassi ed Igiene degli Alimenti. Facoltà di Medicina Veterinaria, Università di Pisa, Viale delle Plagge 2, 56127 Pisa, Italy
Abstract:This study deals with the influence of temperature on the hatching of eggs of Diplectanum aequans, a branchial ectoparasite of sea bass (Dicentrarchus labrax). At temperatures of 20 °C, 25 DaggerC and 30 °C hatching takes place within a few days of laying, whereas at 15 DaggerC and 10 DaggerC it occurs respectively between the 7th and the 12th day and between the 11th and the 19th day. No hatching has been observed at 5 DaggerC. Development is not completely inhibited at 5 DaggerC as the eggs can, at least partially, go on maturing and will subsequently hatch as soon as higher temperatures are encountered.
Keywords:Diplectanum aequans (Monogenea  Diplectanidae)  Hatching of eggs  Temperature  Sea bass (Dicentrarchus labrax)
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