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Effect of two temperatures on yield and increase in cranial skeletal abnormalities during early development of palm ruff, S eriolella violacea ( G uichenot 1848)
Author(s) -
ArgüelloGuevara Wilfrido,
BohórquezCruz Milton,
Silva Alfonso
Publication year - 2017
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.12882
Subject(s) - biology , juvenile , hatching , zoology , ontogeny , palm , yield (engineering) , degree (music) , anatomy , ecology , endocrinology , acoustics , physics , materials science , quantum mechanics , metallurgy
The present study evaluates the effect of two temperatures, 14°C (T14) and 18°C (T18), on yield and the presence of cranial abnormalities during early development in north palm ruff ( S eriolella violacea ). Different time indices – days post‐hatching ( DPH ), degree‐days (D°) and effective degree‐days (D° eff ) – were used to analyse growth during cultivation. Several ontogenetic events were achieved in less time during cultivation at 18°C. Additionally, a larger total length and final weight, as well as a higher survival rate, were achieved after 80 days of culture at higher temperatures (T18 = 55.5 ± 1.5 mm; 2.87 ± 0.21 g; 1.80 ± 0.18% and T14 = 24.3 ± 2.2 mm; 0.26 ± 0.08 g; 1.33 ± 0.12%). D° and D° eff were valid as independent temperature indices for predicting the growth response of S . violacea against thermal variations. The frequencies of cranial skeletal abnormalities (mouth and opercular complex) were evaluated in the pre‐flexion, flexion, post‐flexion and juvenile stages. However, the frequency of cranial skeletal abnormalities at the end of this study was not significantly influenced ( P > 0.05) by temperature, and values below 21% were recorded in both treatments. These results can be of practical use for optimizing culture conditions to maximize the yield and quality of S . violacea juveniles.