Effect of delayed first feeding on larval performance of the spider crab Maja brachydactyla assessed by digestive enzyme activities and biometric parameters |
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Authors: | Guiomar Rotllant Francisco Javier Moyano Mireia Andrés Alicia Estévez Manuel Díaz Enric Gisbert |
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Institution: | 1. Unitat Operativa de Cultius Experimentals, IRTA, Carretera del Poblenou km 5.5, 43540, Sant Carles de la Ràpita, Tarragona, Spain 2. Department of Biología Aplicada, Escuela Politécnica Superior, Edificio CITE II-B, Universidad de Almería, Campus Universitario de la Ca?ada, 04120, Almería, Spain
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Abstract: | The effect of food deprivation on larval performance of the spider crab Maja brachydactyla was studied in terms of survival, moulting capacity, size, weight and enzymatic activities. Five feeding treatments that
differed in the initial age of first feeding larvae (fed from hatching, 2, 4 and 6 days post-hatching and unfed) were tested
for 20 days. Newly hatched larvae kept without food supply lasted for 10 days and did not moult; with 50% survival observed
at 6 days post-hatching. Larvae (zoea I stage) were only able to tolerate 2 days of food deprivation after the onset of exogenous
feeding without their performance being compromised. Multivariate analyses suggest that digestive enzyme activities may be
good indicators of the nutritional condition of larvae. |
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