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Cephalopod hatchling growth: the effects of initial size and seasonal temperatures
- Source :
- Marine Biology. 151:1375-1383
- Publication Year :
- 2006
- Publisher :
- Springer Science and Business Media LLC, 2006.
-
Abstract
- Temperature is known to have a strong influence on cephalopod growth during the early exponential growth phase. Most captive growth studies have used constant temperature regimes and assumed that populations are composed of identically sized individuals at hatching, overlooking the effects of seasonal temperature variation and individual hatchling size heterogeneity. This study investigated the relative roles of initial hatchling size and simulated natural seasonal temperature regimes on the growth of 64 captive Octopus pallidus over a 4-month period. Initial weights were recorded, and daily food consumption and fortnightly growth monitored. Two temperature treatments were applied replicating local seasonal water temperatures: spring/summer (14–18°C) and summer/autumn (18–14°C). Overall octopuses in the spring/summer treatment grew at a rate of 1.42% bwd−1 (% body weight per day) compared to 1.72% bwd−1 in the summer/autumn treatment. Initial size influenced growth rate in the summer/autumn treatment with smaller octopuses (
Details
- ISSN :
- 14321793 and 00253162
- Volume :
- 151
- Database :
- OpenAIRE
- Journal :
- Marine Biology
- Accession number :
- edsair.doi...........6bae94d005ea260bc07a95cd575091fc
- Full Text :
- https://doi.org/10.1007/s00227-006-0575-y