The Skin of Cephalopods (Coleoids): General and Special Adaptations

Packard, Andrew; Trueman, E. R.; Clarke, M. R.

doi:10.1016/b978-0-12-751411-6.50010-2

Cited by 43 publications

(43 citation statements)

References 53 publications

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“…A second potential source of energy demand that is unique to the nocturnal dumpling squid is the production of a highly sulfated mucopolysaccharide mucus (Packard 1988) that is associated with the production of a "glue" that is used to stick sand grains to the skin of the individuals during the day; at night, secretion of another substance is thought to dissolve the glue, allowing the sand to drop off (Norman and Lu 1997). Although in our study the animals were not provided with sand to allow this behavior to be expressed, it is not known whether secretion of these mucus products occurs independently of the behavior.…”

Section: Discussionmentioning

confidence: 99%

“…Given what we understand to date about cephalopods, and about squid in particular, it is unrealistic to expect this group of invertebrates to be physiologically similar to fish (Packard 1972;O'Dor and Webber 1986). Despite this, it has been suggested that it would be easier to generate models of growth that pretend that they are (Pauly 1998); however, the metabolic limitations of growth and the process of growth may not be the same for cephalopods and teleost fish.…”

Section: Introductionmentioning

confidence: 99%

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Protein Synthesis, Degradation, and Retention: Mechanisms of Indeterminate Growth in Cephalopods

Moltschaniwskyj

Carter

2010

Physiological and Biochemical Zoology

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This study is the first to examine the underlying process of growth in a cephalopod, the southern dumpling squid (Euprymna tasmanica), to ascertain the mechanism by which indeterminate growth is achieved in this live-fast, die-young group of animals. This is the first study to estimate rates of protein synthesis and growth of squid from 7 to 140 d of age, providing an understanding of both the pattern and the process of growth throughout the lifetime of a squid species. Younger and smaller individuals had greater rates of protein synthesis and protein synthesis retention efficiency, as well as more RNA, than did older and larger individuals. Variation in growth rates among older, larger individuals was a function of individuals with faster growth rates having greater protein synthesis retention efficiency and also greater concentrations of protein. Critically, growth did not cease in the adults and, with an average of 10% of protein synthesized being retained, the mechanism to support the nonasymptotic growth model of cephalopods is provided.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Protein Synthesis, Degradation, and Retention: Mechanisms of Indeterminate Growth in Cephalopods

Moltschaniwskyj

Carter

2010

Physiological and Biochemical Zoology

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“…The suckers are a distinctive feature of all living Coleoidea (girod, 1884; nixon & dilly, 1977) and are unique derivatives of the skin (PaCkard, 1988 Decapodiformes, the sucker has a chamber or acetabulum with a wall lined with a stiff chitinous inner ring, which may bear teeth around its outer perimeter ( Fig. 8.1).…”

Section: Arms and Tentacles: Suckers Hooks And Cirrimentioning

confidence: 99%

“…In addition, it has developed into an organ for concealment and behavioral expression (PaCkard, 1988). Epithelial, glandular, and sensory cells are present in the skin, as well as various specialized dermal tissues and structures, including papillae, Kölliker's tufts, adhesive pads, dermal cushions, tubercles, chromatophores, iridophores, and photophores, and suckers, hooks, and cirri (Mangold, Bidder, & PortMann, 1989b;BudelMann, SChiPP, & von Boletzky, 1997).…”

Section: The Skin: Dermal Structures Chromatophores Leucophores Irmentioning

confidence: 99%

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Treatise Online, no. 17, Part M, Chapter 3: Anatomy of Recent forms

Nixon¹

2011

TREON

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Cryo‐scanning electron microscopy investigation of the Octopus Vulgaris arm structures for the design of an octopus‐like arm artefact

Minnocci

Cianchetti

Mazzolai

et al. 2015

Microscopy Res & Technique

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Octopus vulgaris is a cephalopod of the Octopodidae family. It has four pairs of arms and two rows of suckers which perform many functions, including bending and elongation. For this reason the octopus was chosen as model to develop a new generation of soft-body robots. In order to explain some of the fine structures of the octopus arm in relation to its specific ability, we examined the external and internal structures of O. vulgaris arms in a frozen-hydrated state using cryo-scanning electron microscopy. The arms showed skin with a very complex design that is useful to elongation, and a pore pattern distribution on their surface which is functional to cutaneous oxygen uptake. The analysis of freeze-fractured frozen-hydrated arm samples allowed us to describe the developmental differences in the relative proportion of the areas of axial nerve cord, intrinsic and extrinsic musculature, in relation to the growth of the arms and of the increase in functional capability. In the suckers, we analyzed the shedding mechanisms in the outer part of the infundibulum and described the outer and inner characteristics of the denticles, showing in detail their pore system, which is fundamental for their ability to explore the environment. These results are discussed by considering their possible application in the design of new octopus-like artefacts, which will be able to take advantage of some of these ultrastructure characteristics and achieve advanced bioinspired functionalities.

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The Skin of Cephalopods (Coleoids): General and Special Adaptations

Cited by 43 publications

References 53 publications

Protein Synthesis, Degradation, and Retention: Mechanisms of Indeterminate Growth in Cephalopods

Protein Synthesis, Degradation, and Retention: Mechanisms of Indeterminate Growth in Cephalopods

Treatise Online, no. 17, Part M, Chapter 3: Anatomy of Recent forms

Cryo‐scanning electron microscopy investigation of the Octopus Vulgaris arm structures for the design of an octopus‐like arm artefact

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