Effects of temperature on embryo development and metabolism of O. maya
Por:
Caamal-Monsreal, Claudia, Uriarte, Iker, Farias, Ana, Diaz, Fernando, Sanchez, Adolfo, Re, Denisse, Rosas, Carlos
Publicada:
20 ene 2016
Categoría:
Aquatic Science
Resumen:
Octopus maya is one of the most promising candidates for octopus
aquaculture due to its holobenthic development. The objectives of this
study were to investigate: i) whether the time required for embryonic
development of this species can be reduced; ii) whether high or low
temperatures affect the size and physiological characteristics of
embryos; iii) whether temperature affects the time taken to reach stage
XX, using thermal time; and iv) the effects of incubation temperature on
hatchling performance, measured as survival after 10 d fasting. Eggs
were acclimated at 18, 22, 26 and 30 degrees C. Embryos incubated at 30
degrees C reached stage XX 50 d before embryos incubated at 18 degrees
C. A mean value of 596 degrees day(-1) was obtained for embryos
incubated at 22 and 26 degrees C where embryo development was optimum.
Principal component analysis showed that arm length was the
morphological characteristic that separated embryos incubated at 22
degrees C from the rest of the treatments. Embryos in stage XIX and
incubated at 26 degrees C had a higher metabolic rate than embryos
maintained at other experimental temperatures. The best hatchling
performance was obtained with embryos incubated at 22 degrees C. Results
indicated that the optimal temperature for O. maya incubation is in the
range of 22-26 degrees C.
Statement of relevance: Octopus maya is one of the most promising
species for octopus aquaculture due its holobenthic development. This
study will be useful when design production facilities because it gives
key information to obtain the hatchlings with the best performance. (C)
2015 Elsevier B.V. All rights reserved.
Filiaciones:
Caamal-Monsreal, Claudia:
Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Merida, Yucatan, Mexico
Uriarte, Iker:
Univ Austral Chile, Sede Puerto Montt, Chile
Farias, Ana:
Univ Austral Chile, Sede Puerto Montt, Chile
Diaz, Fernando:
Ctr Invest Cient & Educ Super Ensenada BC, Dept Biotecnol Marina, Ensenada, Baja California, Mexico
Sanchez, Adolfo:
Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Merida, Yucatan, Mexico
Re, Denisse:
Ctr Invest Cient & Educ Super Ensenada BC, Dept Biotecnol Marina, Ensenada, Baja California, Mexico
Rosas, Carlos:
Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Merida, Yucatan, Mexico
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