Effect of maternal temperature stress before spawning over the energetic balance of Octopus maya juveniles exposed to a gradual temperature change
Por:
Juarez, Oscar E., Hau, Veronica, Caamal-Monsreal, Claudia, Galindo-Sanchez, Clara E., Diaz, Fernando, Re, Denisse, Rosas, Carlos
Publicada:
1 ene 2016
Resumen:
Octopus maya supports an important fishery in Yucatan Peninsula (YP)
where this species is highly abundant. Considering that temperatures in
the tropics are increasing (IPCC, 2013), there are several scenarios
that can modify the dynamic of the O. maya population in YP: i)
prolonged summer and short winter seasons, and/or ii) fast temperature
increases and high temperatures after a winter season, both affecting
the survival of hatchlings and the performance of juveniles. The present
study was designed to evaluate the effect of maternal temperature stress
over hatchling and juvenile performance in terms of their energetic
plasticity and thermoregulatory behaviour, when they were exposed to a
gradual temperature increase (TI) from 24 to 30 degrees C and compared
with hatchlings maintained at preferred and constant temperature (24
degrees C). Hatchlings from stressed females were smaller, and had a
lower growth rate compared to those from unstressed females providing
evidence that temperature stress experienced by females has consequences
on the performance of hatchlings, with effects on the biomass production
and survival. Results also demonstrated that hatchlings exposed to TI
(24-30 degrees C) had a growth rate and oxygen consumption similar to
those maintained at preferred temperature (24 degrees C), in both female
groups indicating that a gradual temperature increase of 1 degrees C
every 5 days is probably enough to allow the organisms to make
physiological adjustments without an excessive energetic cost. (C) 2015
Elsevier B.V. All rights reserved.
Filiaciones:
Juarez, Oscar E.:
CICESE, Dept Biotecnol Marina, Lab Genom Func Organismos Marinos, Ensenada, Baja California, Mexico
Hau, Veronica:
Inst Tecnol Tizimin, Tizimin Yucatan, Mexico
Caamal-Monsreal, Claudia:
Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Sisal, Yucatan, Mexico
Galindo-Sanchez, Clara E.:
CICESE, Dept Biotecnol Marina, Lab Genom Func Organismos Marinos, Ensenada, Baja California, Mexico
Diaz, Fernando:
CICESE, Dept Biotecnol Marina, Lab Ecofisiol Organismos Acuat, Ensenada, Baja California, Mexico
Re, Denisse:
CICESE, Dept Biotecnol Marina, Lab Ecofisiol Organismos Acuat, Ensenada, Baja California, Mexico
Rosas, Carlos:
Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Sisal, Yucatan, Mexico
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