Midgut-Gland Development during Early Life-History Stages of the American Lobster Homarus americanus

Biesiot, Patricia M.; McDowell, Judith E.

doi:10.2307/1548817

Cited by 10 publications

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“…The hepatopancreass originates from the midgut anlage near its junction with the stomach (Figure a,b). The morphogenesis of the hepatopancreas has been described for species from various higher taxa including the penaeid shrimps Penaeus setiferus (Linnaeus, 1767) (Lovett & Felder, ), Penaeus vannamei Boone, 1931 (Muhammad, Zhang, Shao, Dong, & Muhammad, ), and Ploeticus muelleri (Spence Bate, 1888) (Díaz, Fernandez Gimenez, Velurtas, & Fenucci, ), the caridean shrimp Lysmata amboinensis (de Man, 1888) (Tziouveli, Bastos‐Gomez, & Bellwood, ), the lobster Homarus americanus H. Milne Edwards, 1837 (Biesiot & McDowell, ; Factor, ), the spiny lobsters Palinurus ornatus (Fabricius, 1798) (Smith et al, ) and Jasus edwardsii (Hutton, 1875) (Nishida, Takahashi, & Kittaka, ) and the brachyuran crabs Carcinus maenas (Linnaeus, 1758) (Spitzner et al, ), Paralithodes camtschaticus (Tilesius, 1815) (Abrunhosa & Kittaka, ), and Maja brachydactyla Balss, 1922 (Castejón et al, ).…”

Section: Morphogenesis Of the Hepatopancreasmentioning

confidence: 99%

Functional cytology of the hepatopancreas of decapod crustaceans

Vogt

2019

Journal of Morphology

158

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This article reviews the morphogenesis, morphology, histology, ultrastructure, and structural-functional relationships of the hepatopancreas, the main metabolic organ of the Decapoda. The hepatopancreas develops in early larval stages from a pair of lateral lobes of the midgut anlage. In adults, it consists of hundreds of blindly ending tubules that are enveloped by a muscle net consisting of longitudinal and circular fibers. Stem cells at the distal ends of the tubules give rise to three ultrastructurally different epithelial cell types, the R-, F-, and B-cells. Histochemistry, immunohistochemistry, in situ hybridization, and monitoring of ultrastructural changes under different experimental conditions allowed the attribution of functions to these cell types. R-cells serve for the absorption and metabolization of nutrients, storage of energy reserves and minerals, synthesis of lipoproteins for export to other organs, detoxification of heavy metals, and excretion of uric acid. F-cells synthesize digestive enzymes and blood proteins involved in oxygen transport and immune defense. They also detoxify some heavy metals and probably organic xenobiotics. B-cells are assumed to produce and recycle fat emulsifiers. The hepatopancreas tubules lack nerves. The presence of scattered M-cells with putative endocrine function in the epithelium suggests that the hepatopancreas is mainly hormonally controlled. M-cells probably represent a self-perpetuating cell lineage independent from E-cells. The interstitium between the tubules contains connective tissue, arterioles, hemolymph with circulating hemocytes, and fixed phagocytes that eliminate pathogens.The hepatopancreas is histologically and ultrastructurally uniform throughout the Decapoda, despite their broad variety in body size, morphology, life style, and ecology.However, in a few cavernicolous and deep-sea shrimps parts of the hepatopancreas are transformed into large oil storing and bioluminescent compartments. Within the malacostracan crustaceans, the hepatopancreas of the Decapoda is most similar to the digestive gland of the Euphausiacea, supporting close taxonomic relationship of these two taxa.

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Section: Morphogenesis Of the Hepatopancreasmentioning

confidence: 99%

Functional cytology of the hepatopancreas of decapod crustaceans

Vogt

2019

Journal of Morphology

158

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“…The hepatopancreas contains four types of cells within the epithelium (E-, F-, B-and R-cells), each performing specific functions (Biesiot & McDowell 1995) (Fig. 4).…”

Section: Rheology and Nutrient Digestionmentioning

confidence: 99%

“…B-cells, which are derived from F-cells, also absorb nutrients by pinocytosis and produce the majority of the digestive enzymes secreted in the hepatopancreas. Finally, R-cells, the most numerous cell type in the hepatopancreas, perform the functions of intracellular absorption and storage of minerals and digested nutrients, including amino acids, fatty acids and glycogen (Mikami et al 1994;Biesiot & McDowell 1995;Anger 2001).…”

Section: Rheology and Nutrient Digestionmentioning

confidence: 99%

Palinurid lobster aquaculture: nutritional progress and considerations for successful larval rearing

Francis

Salmon

Kenway

et al. 2013

Reviews in Aquaculture

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The closed-cycle rearing of palinurid lobsters in commercially relevant quantities currently represents one of the most difficult challenges facing modern-day aquaculture. The length and complexity of the larval life cycle exacerbate the problem, comprising the major bottleneck to their successful aquaculture. The general consensus is that developments in the key research area of nutrition will provide the necessary breakthroughs to make the closed-cycle rearing of lobster a reality. Due to the cryptic nature of feeding preferences and complex larval morphology, a commercially formulated feed for their culture does currently not exist. Nevertheless, there has been a wealth of research conducted to elucidate many of the unknowns concerning larval nutritional requirements. This review presents a synthesis of this information, ranging from investigations of larval morphology and feeding behaviour, hatchery nutrition practices, the elucidation of wild prey items and the nutritional content of wild-caught larval species. Based on the information available, this review culminates with a 'best guess' formulation for a larval spiny lobster diet, taking aspects concerning both the physical and chemical attributes of formulation into consideration. It is concluded that larval spiny lobsters are likely comparatively low in relation to other larval species with respect to their quantitative dietary requirements. Ultimately, the overall success of the larval cycle appears to be dictated by the stockpiling of lipids to fuel an energydemanding metamorphosis and a subsequent nonfeeding puerulus phase. These insights provide valuable direction for the formulation of nutritionally complete feeds to permit the closed-loop culture of spiny lobster species.

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“…El estado de la glándula digestiva, se observó constantemente con contenidos alimenticios, a pesar de que en ocasiones el intestino estuviera ya evacuado. Este hecho permite comprobar una de las principales funciones de esta glándula, relacionadas con el almacenaje de nutrientes y reservas energéticas (Biesiot & McDowell, 1995;Hammer et al, 2000, Franceschini et al, 2009. Los valores promedios para este indicador (1,5), con un mínimo de 0,7 permite determinar que probablemente las larvas están permanentemente consumiendo y procesando el alimento, y a su vez manteniendo reservas por periodos prolongados de tiempo, lo cual podría sustentar momentos de ayuno fisiológico, por ejemplo en periodos de muda (Fig.…”

Section: Discussionunclassified

“…No obstante, el funcionamiento de la glándula digestiva también depende de la digestibilidad de los alimentos, su asimilación y actividad enzimática (Jones et al, 1997). La glándula digestiva en crustáceos decápodos ha sido identificada como responsable, entre otras funciones, de la síntesis y secreción de enzimas digestivas, de la absorción de nutrientes ya digeridos en el estómago y del lugar para el almacenaje de reservas energéticas, señalando además la existencia de cambios morfológicos y funcionales de esta glándula durante el desarrollo larvario y principalmente en juveniles (Lovett & Felder, 1990;Biesiot & McDowell, 1995;Hammer et al, 2000, Franceschini et al, 2009.…”

Section: Discussionunclassified

Indicadores de condicion larvaria aplicados al camaron de rio del norte Cryphiops caementarius (Molina, 1782), en condiciones de cultivo controlado

Morales

Meruane

2012

lajar

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Indicadores de condición larvaria aplicados al camarón de río del norte RESUMEN:Se estudia el desarrollo larvario del camarón de río del norte de Chile, Cryphiops caementarius, desde el estado de zoea 1 hasta el primer juvenil, caracterizando y analizando criterios que verificaron la aplicación de indicadores de tipo morfológico y de comportamiento para la evaluación de la condición larvaria de la especie, en condiciones de cultivo. Las larvas, se mantuvieron en cultivo, en un tanque de 250 L con agua a 20 psu y temperatura de 25 ± 1ºC, controlada con termostato y con un recambio del 100% diariamente. La alimentación consistió en microalgas (Nannochloris sp. e Isochrysis sp.), rotíferos (Brachionus plicatilis), nauplios de Artemia franciscana y alimento formulado. Se utilizaron cinco indicadores de carácter morfológico y de comportamiento aplicados a las larvas de C. caementarius: llenado intestinal, estado de la glándula digestiva, desarrollo branquial, comportamiento natatorio y respuesta fototáctica. Estos indicadores, permitieron determinar el estado de condición y calidad de las larvas de C. caementarius, logrando un efectivo seguimiento y asociación de cada uno de ellos, con cada estado de desarrollo larvario, estandarizando características deseables en las larvas y evidenciando resultados verificables, que permitan establecer un adecuado plan de seguimiento del cultivo, optimizar los protocolos de manejo y de alimentación de las larvas. Además de cada indicador, fue posible desglosar una amplia gama de potenciales estudios a realizar, basados en las relaciones que la morfología y el comportamiento larvario mantienen con las capacidades fisiológicas de las larvas en desarrollo. Palabras claves: indicadores, desarrollo larvario, ontogenia, morfología, comportamiento, Cryphiops caementarius, Chile. Larval condition indicators applied to the northern river shrimp Cryphiops caementarius (Molina, 1782), under condition of controlled cultivation ABSTRACT:The larval development of the Chilean northern river shrimp Cryphiops caementarius was studied, from the condition of zoea 1 up to the condition of juvenile stage, analyzing and characterizing diverse criteria that allowed checking the application of morphological and behavioral indicators for the evaluation of the larval quality of the species, under conditions of culture. The larvae, were cultured, in a tank of 250 L with water at 20 psu, at a constant temperature (25º ± 1ºC), controlled with a thermostat and with 100% refill every day. The diet consisted of microalgae (Nannochloris sp. and Isochrysis sp.), rotifers (Brachionus plicatilis), nauplii of Artemia franciscana and formulated food. Five indicators were used, considering morphologic and behavior aspects: intestinal fill, midgut gland condition, gill development, swimming behavior and phototactic response. The indicators selected in the present work, were feasible of being used for the determination of the condition and quality of the larvae of C. caementarius, being able to make an effective follow-up...

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Midgut-Gland Development during Early Life-History Stages of the American Lobster Homarus americanus

Cited by 10 publications

References 0 publications

Functional cytology of the hepatopancreas of decapod crustaceans

Functional cytology of the hepatopancreas of decapod crustaceans

Palinurid lobster aquaculture: nutritional progress and considerations for successful larval rearing

Indicadores de condicion larvaria aplicados al camaron de rio del norte Cryphiops caementarius (Molina, 1782), en condiciones de cultivo controlado

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