Functional Morphology and Cytology of the Phyllosomal Digestive System of Ibacus Ciliatus and Panulirus Japonicus (Decapoda, Scyllaridae and Palinuridae)

Mikami, Satoshi; Greenwood, J. A.; Takashima, Fumio

doi:10.1163/156854094x00576

Cited by 43 publications

(17 citation statements)

References 14 publications

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“…Thus, based on this and previous studies (Rodriguez Souza et al, 1996;Rodriguez Souza et al, 1999;Rodriguez Souza, 1997) it seems fairly secure to say that spiny lobster larvae are able to obtain nutrients in three different ways: by capture and ingestion of large food masses, by oral ingestion of particulate compounds suspended or dispersed in the ambient water, and by direct absorption of dissolved materials through the integument. In this regard, it must be noted that the low survival rates typically obtained during larval rearing of this species are often attributed to unsatisfactory diet quality (Mikami et al, 1993). However, with few exceptions [e.g.…”

Section: Discussionmentioning

confidence: 99%

Oral and integumental uptake of free exogenous glycine by the Japanese spiny lobsterPanulirus japonicusphyllosoma larvae

Souza

Strüssmann

Takashima

et al. 2010

Journal of Experimental Biology

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Section: Discussionmentioning

confidence: 99%

Oral and integumental uptake of free exogenous glycine by the Japanese spiny lobsterPanulirus japonicusphyllosoma larvae

Souza

Strüssmann

Takashima

et al. 2010

Journal of Experimental Biology

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“…Larger particles that are rejected as pseudo-faeces pass directly from the proventriculus through the midgut and hindgut, and during active feeding they have a relatively short midgut resident time of 5-10 min before excretion, similar to that observed in other phyllosoma (Brunet et al 1994;mikami et al 1994;mikami & Takashima 2000).…”

Section: Discussionmentioning

confidence: 63%

“…it may be possible to stain specific dietary components and monitor their route of uptake through R or B cells using real-time light microscopy. Remnant particles not digested or provided to excess remain in the B cells and along with R cells may be expelled with other faecal matter (Brunet et al 1994;mikami et al 1994). We suggest that a predominance of digestive cells in the faeces may signal a diet that is energetically difficult to digest or that dietary ingredients are present in excess quantities.…”

Section: Discussionmentioning

confidence: 79%

“…hence, there may be value in adequately describing and monitoring the presence and prominence of digestive cell types in the phyllosoma midgut gland under different feeding regimes. it is known that R cells are the dominant cell in the midgut gland of crustaceans, and play an active role in the uptake of amino acids, lipids and other small molecular weight substances by selective transport through the apical cell membrane (Brunet et al 1994;mikami et al 1994). it may be possible to stain specific dietary components and monitor their route of uptake through R or B cells using real-time light microscopy.…”

Section: Discussionmentioning

confidence: 99%

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Use of microspheres, fresh and microbound diets to ascertain dietary path, component size, and digestive gland functioning in phyllosoma of the spiny lobsterPanulirus ornatus

Smith

Hall

Salmon

2009

New Zealand Journal of Marine and Freshwater Research

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The ability of Panulirus ornatus phyllosoma to capture, feed and process diets of different texture and particle size were studied during developmental stages I, III and V. Diets were captured using the spines and dactyl on the second and third pereiopods and brought to the oral cavity assisted by the second and third maxillapeds. Optimal capture was obtained when diets were a gelatinous-muscular consistency, and hard particles were caught when embedded in a muscular carrier. A range of food textures, from gelatinous to hard, were able to be masticated in the oral cavity by stage V phyllosoma. Masticated particles were filtered by phyllosoma through spines and hairs in the proventriculum, during stages I-II, and a filter press in stages III-V. Maximum particle size passing into the midgut gland for digestion was 7, 3 and 0.5 //m in stage I, III and V phyllosoma, respectively. B cells were prominent in the proximal ends of the caece of stage V phyllosoma and were visible in live animals under light microscopy.

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“…Hindgut and foregut in crustaceans are cuticle-lined and thus mechanically protected (Mikami & Takashima 1993, Greenaway 2001. In contrast, the midgut is not cuticle-lined (Mikami et al 1994) and thus relatively vulnerable. There are three possible mechanisms whereby phyllosomas can feed on intact nematocyst-loaded tentacles of jellyfish.…”

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confidence: 99%

Phyllosomas of smooth fan lobsters (<i>Ibacus novemdentatus</i>) encase jellyfish cnidae in peritrophic membranes in their feces

Kamio

Wakabayashi

Nagai

et al. 2016

Plankton Benthos Res

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Jellyfish possess venomous cnidae on their tentacles to capture and consume marine zooplankton. Nevertheless, the planktonic larvae of the smooth fan lobster (Ibacus novemdentatus), known as phyllosoma, prey on jellyfish and successfully ingest both tentacle tissue as well as constituent cnidae, despite the presence of the venom-filled explosively penetrant cnidae or nematocysts. In the present study, we hypothesized that phyllosomas have mechanical and/or physiological resistance to internal envenomation by ingested nematocysts. To test this hypothesis, we examined the feces of phyllosomas (n=5) that were fed with Japanese sea nettle (Chrysaora pacifica) and found both undischarged as well as discharged cnidae surrounded by peritrophic membrane. We surmise that this membrane may mechanically insulate the lining of the midgut from stinging nematocysts to avoid injection of jellyfish venom into the phyllosomas body by nematocyst tubule penetration. We then tested physiological sensitivity of the phyllosomas (n=10) to crude extract of tentacle cnidae injected into their bodies. For this experiment, we used a crude venom extract prepared from nematocysts isolated from tentacles of a rhizostome jellyfish (Nemopilema nomurai) after exposure to high salt which disrupted tentacle integrity, and phosphate-buffered saline as a control. Nine out of 10 animals died after the injection of crude venom extract, while none of the animals died in the control group. These results indicate that the defense of phyllosoma larvae against the toxin of jellyfish is a combination of mechanical inactivation of the ingested nematocysts and chemical digestion of the toxin in the midgut rather than physiological resistance against the toxin.

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Functional Morphology and Cytology of the Phyllosomal Digestive System of Ibacus Ciliatus and Panulirus Japonicus (Decapoda, Scyllaridae and Palinuridae)

Cited by 43 publications

References 14 publications

Oral and integumental uptake of free exogenous glycine by the Japanese spiny lobsterPanulirus japonicusphyllosoma larvae

Oral and integumental uptake of free exogenous glycine by the Japanese spiny lobsterPanulirus japonicusphyllosoma larvae

Use of microspheres, fresh and microbound diets to ascertain dietary path, component size, and digestive gland functioning in phyllosoma of the spiny lobsterPanulirus ornatus

Phyllosomas of smooth fan lobsters (<i>Ibacus novemdentatus</i>) encase jellyfish cnidae in peritrophic membranes in their feces

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