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Effects of size dominance on the survival, growth and physiological activities of juvenile pharaoh cuttlefish (Sepia pharaonis) by Jiang, Maowang; Ruan, Peng; Peng, Ruibing; Han, Qingxi; Jiang, Xiamin is a Environmental Science article available to read on EtoBox.

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The impact of individual size differences on social interactions and social groups are being increasingly recognized by researchers in different disciplines, but studies on cephalopods are still scanty. A two-stage trial was conducted to evaluate the effect of size ratios on growth and physiology of juvenile pharaoh cuttlefish (Sepia pharaonis). Juvenile cuttlefish were divided into two size groups (large (L): weight 1.0 ± 0.08 g, mantle length 1.5 ± 0.1 cm; small (S): weight 0.3 ± 0.05 g, mantle length 0.8 ± 0.1 cm), and groups with the following size-based ratios (L:S) were established: 0:30, 3:27, 6:24, 9:21, 12:18, 15:15, and 30:0. During the first phase of the 4-week trial, the growth parameters indicated that small cuttlefish experienced growth depression at the size ratio of large cuttlefish > 9:21, which seemed to be irreversible. When large cuttlefish were removed from the 9:21 group, compensatory growth occurred, and define specific growth rate was significantly higher than that in other groups (P < .05). The occurrence of low levels of glycogen in tissue and of stress-induced physical damage indicated size dominance affects feeding, that small individuals were suppressed

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Author

Jiang, Maowang; Ruan, Peng; Peng, Ruibing; Han, Qingxi; Jiang, Xiamin

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-0981)

Published

2020

Language

EN

Field

Environmental Science (Physical Sciences)