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7. OVERVIEW OF THE NEUROCYTOLOGY OF GANGLIA AND IDENTIFICATION OF PUTATIVE SEROTONIN- AND DOPAMINE-SECRETING NEURONS IN THE BIVALVE PEPPERY FURROW SHELL (SCROBICULARIA PLANA)

Author

Tantiwisawarji, Sukanlaya, Malhao, Fernanda, Lopes, Celia, Silva, Ana, Kovitvadhi, Uthaiwan, Pardal, Miguel A., Rocha, Maria J., and Rocha, Eduardo

Subjects
Mollusks -- Physiological aspects, Ganglia -- Physiological aspects, Dopamine -- Physiological aspects, Serotonin -- Physiological aspects, Neurons -- Physiological aspects, Biological sciences, Zoology and wildlife conservation
Abstract

A novel histological and ultrastructural study of the three ganglia types of Scrobicularia plana was made. Adults of both sexes and immature specimens were collected at Ria Formosa lagoon, Portugal. For light microscopy, animals fixed in formalin were processed for various staining, including serotonin and dopamine immunohistochemistry. For transmission electron microscopy, dissected ganglia were fixed in glutaraldehyde and routinely processed. Every ganglion reveals an outer cortex and inner medulla, with the cortex displaying large and small neurons. Their sizes decrease as they are located closer to the medulla. Almost all are unipolar, and only a few are bipolar. Glial cells appear around the neurons and amidst the axons. They usually have smaller sizes and greater nucleus-cytoplasm ratios. The glial morphologies (fusiform, roundish, and triangular) may correspond to glia subtypes and/or functional statuses. Ultrastructural differences from earlier studies were noted, mainly in the type of inclusions and vacuoles. Serotonergic and dopaminergic cell bodies and neuntes exist in all ganglia. There is an identical expression pattern in adults (both sexes) and in immature animals. Nevertheless, the extent/intensity of serotonin positivity in visceral ganglia supports that mature animals have a stronger expression, which may be connected the role of that amine in gonad maturation and spawning. KEY WORDS: Scrobicularia plana, bivalve, nervous system, glial cells, histology/ultrastructure, monoamines, neurons, INTRODUCTION The nervous system of invertebrates is composed of two main categories of cells, neurons and glial cells (Bullock & Horridge 1965, Coles & Abbott 1996, Harrison & Kohn 1997, [...]

Published
2017
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11. First insights into oxidative stress and theoretical environmental risk of Bronopol and Detarox® AP, two biocides claimed to be ecofriendly for a sustainable aquaculture

Author

Magara, Gabriele, primary, Sangsawang, Akkarasiri, additional, Pastorino, Paolo, additional, Bellezza Oddon, Sara, additional, Caldaroni, Barbara, additional, Menconi, Vasco, additional, Kovitvadhi, Uthaiwan, additional, Gasco, Laura, additional, Meloni, Daniela, additional, Dörr, Ambrosius Josef Martin, additional, Prearo, Marino, additional, Federici, Ermanno, additional, and Elia, Antonia Concetta, additional

Published
2021
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12. Research priorities for freshwater mussel conservation assessment

Author

Ferreira-Rodríguez, Noé, Akiyama, Yoshihiro B, Aksenova, Olga V, Araujo, Rafael, Barnhart, M Christopher, Bespalaya, Yulia V, Bogan, Arthur E, Bolotov, Ivan N, Budha, Prem B, Clavijo, Cristhian, Clearwater, Susan J, Darrigran, Gustavo, Do, Van Tu, Douda, Karel, Froufe, Elsa, Gumpinger, Clemens, Henrikson, Lennart, Humphrey, Chris L, Johnson, Nathan A, Klishko, Olga, Klunzinger, Michael W, Kovitvadhi, Satit, Kovitvadhi, Uthaiwan, Lajtner, Jasna, Lopes-Lima, Manuel, Moorkens, Evelyn A, Nagayama, Shigeya, Nagel, Karl-Otto, Nakano, Mitsunori, Negishi, Junjiro N, Ondina, Paz, Oulasvirta, Panu, Prié, Vincent, Riccardi, Nicoletta, Rudzīte, Mudīte, Sheldon, Fran, Sousa, Ronaldo, Strayer, David L, Takeuchi, Motoi, Taskinen, Jouni, Teixeira, Amilcar, Tiemann, Jeremy S, Urbańska, Maria, Varandas, Simone, Vinarski, Maxim V, Wicklow, Barry J, Zając, Tadeusz, and Vaughn, Caryn C

Subjects
Unionida, Intrinsic factors, Extrinsic factors, Indicators, Threats, Managementnt
Abstract

Freshwater mussels are declining globally, and effective conservation requires prioritizing research and actions to identify and mitigate threats impacting mussel species. Conservation priorities vary widely, ranging from preventing imminent extinction to maintaining abundant populations. Here, we develop a portfolio of priority research topics for freshwater mussel conservation assessment. To address these topics, we group research priorities into two categories: intrinsic or extrinsic factors. Intrinsic factors are indicators of organismal or po-pulation status, while extrinsic factors encompass environmental variables and threats. An understanding of intrinsic factors is useful in monitoring, and of extrinsic factors are important to understand ongoing and po-tential impacts on conservation status. This dual approach can guide conservation status assessments prior to the establishment of priority species and implementation of conservation management actions.

Published
2019

13. Research priorities for freshwater mussel conservation assessment

Author

Universidade de Santiago de Compostela. Departamento de Zooloxía, Xenética e Antropoloxía Física, Zając, Tadeusz, Vaughn, Caryn C., Ferreira-Rodríguez, Noé, Akiyama, Yoshihiro B., Aksenova, Olga V., Araujo, Rafael, Barnhart, M. Christopher, Bespalaya, Yulia V., Bogan, Arthur E., Bolotov, Ivan N., Budha, Prem B., Clavijo, Cristhian, Clearwater, Susan J., Darrigran, Gustavo, Do, Van Tu, Douda, Karel, Froufe, Elsa, Gumpinger, Clemens, Henrikson, Lennart, Humphrey, Chris L., Johnson, Nathan A., Klishko, Olga, Klunzinger, Michael W., Kovitvadhi, Salit, Kovitvadhi, Uthaiwan, Lajtner, Jasna, Lopes-Lima, Manuel, Moorkens, Evelyn, Nagayama, Shigeya, Nagel, Karl-Otto, Nakano, Mitsunori, Negishi, Junjiro N., Ondina Navarret, María Paz, Oulasvirta, Panu, Prié, Vincent, Riccardi, Nicoletta, Rudzite, Mudite, Sheldon, Fran, Sousa, Ronaldo, Strayer, David L., Takeuchi, Motoi, Taskinen, Jouni, Teixeira, Amílcar, Tiemann, Jeremy S., Urbańska, Maria, Varandas, Simone, Vinarski, Maxim, Wicklow, Barry J., Universidade de Santiago de Compostela. Departamento de Zooloxía, Xenética e Antropoloxía Física, Zając, Tadeusz, Vaughn, Caryn C., Ferreira-Rodríguez, Noé, Akiyama, Yoshihiro B., Aksenova, Olga V., Araujo, Rafael, Barnhart, M. Christopher, Bespalaya, Yulia V., Bogan, Arthur E., Bolotov, Ivan N., Budha, Prem B., Clavijo, Cristhian, Clearwater, Susan J., Darrigran, Gustavo, Do, Van Tu, Douda, Karel, Froufe, Elsa, Gumpinger, Clemens, Henrikson, Lennart, Humphrey, Chris L., Johnson, Nathan A., Klishko, Olga, Klunzinger, Michael W., Kovitvadhi, Salit, Kovitvadhi, Uthaiwan, Lajtner, Jasna, Lopes-Lima, Manuel, Moorkens, Evelyn, Nagayama, Shigeya, Nagel, Karl-Otto, Nakano, Mitsunori, Negishi, Junjiro N., Ondina Navarret, María Paz, Oulasvirta, Panu, Prié, Vincent, Riccardi, Nicoletta, Rudzite, Mudite, Sheldon, Fran, Sousa, Ronaldo, Strayer, David L., Takeuchi, Motoi, Taskinen, Jouni, Teixeira, Amílcar, Tiemann, Jeremy S., Urbańska, Maria, Varandas, Simone, Vinarski, Maxim, and Wicklow, Barry J.

Abstract

Freshwater mussels are declining globally, and effective conservation requires prioritizing research and actions to identify and mitigate threats impacting mussel species. Conservation priorities vary widely, ranging from preventing imminent extinction to maintaining abundant populations. Here, we develop a portfolio of priority research topics for freshwater mussel conservation assessment. To address these topics, we group research priorities into two categories: intrinsic or extrinsic factors. Intrinsic factors are indicators of organismal or population status, while extrinsic factors encompass environmental variables and threats. An understanding of intrinsic factors is useful in monitoring, and of extrinsic factors are important to understand ongoing and potential impacts on conservation status. This dual approach can guide conservation status assessments prior to the establishment of priority species and implementation of conservation management actions.

Published
2019

14. Mesozoic mitogenome rearrangements and freshwater mussel (Bivalvia: Unionoidea) macroevolution

Author

Froufe, Elsa, primary, Bolotov, Ivan, additional, Aldridge, David C., additional, Bogan, Arthur E., additional, Breton, Sophie, additional, Gan, Han Ming, additional, Kovitvadhi, Uthaiwan, additional, Kovitvadhi, Satit, additional, Riccardi, Nicoletta, additional, Secci-Petretto, Giulia, additional, Sousa, Ronaldo, additional, Teixeira, Amilcar, additional, Varandas, Simone, additional, Zanatta, David, additional, Zieritz, Alexandra, additional, Fonseca, Miguel M., additional, and Lopes-Lima, Manuel, additional

Published
2019
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15. Research priorities for freshwater mussel conservation assessment

Author

Ferreira-Rodríguez, Noé, primary, Akiyama, Yoshihiro B., additional, Aksenova, Olga V., additional, Araujo, Rafael, additional, Christopher Barnhart, M., additional, Bespalaya, Yulia V., additional, Bogan, Arthur E., additional, Bolotov, Ivan N., additional, Budha, Prem B., additional, Clavijo, Cristhian, additional, Clearwater, Susan J., additional, Darrigran, Gustavo, additional, Do, Van Tu, additional, Douda, Karel, additional, Froufe, Elsa, additional, Gumpinger, Clemens, additional, Henrikson, Lennart, additional, Humphrey, Chris L., additional, Johnson, Nathan A., additional, Klishko, Olga, additional, Klunzinger, Michael W., additional, Kovitvadhi, Satit, additional, Kovitvadhi, Uthaiwan, additional, Lajtner, Jasna, additional, Lopes-Lima, Manuel, additional, Moorkens, Evelyn A., additional, Nagayama, Shigeya, additional, Nagel, Karl-Otto, additional, Nakano, Mitsunori, additional, Negishi, Junjiro N., additional, Ondina, Paz, additional, Oulasvirta, Panu, additional, Prié, Vincent, additional, Riccardi, Nicoletta, additional, Rudzīte, Mudīte, additional, Sheldon, Fran, additional, Sousa, Ronaldo, additional, Strayer, David L., additional, Takeuchi, Motoi, additional, Taskinen, Jouni, additional, Teixeira, Amilcar, additional, Tiemann, Jeremy S., additional, Urbańska, Maria, additional, Varandas, Simone, additional, Vinarski, Maxim V., additional, Wicklow, Barry J., additional, Zając, Tadeusz, additional, and Vaughn, Caryn C., additional

Published
2019
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19. Evaluation of growth performance and nutritional quality of diets using digestive enzyme markers and in vitro digestibility in Siamese fighting fish (Betta splendens Regan, 1910)

Author

Thongprajukaew, Karun, Kovitvadhi, Uthaiwan, Kovitvadhi, Satit, Engkagul, Arunee, and Rungruangsak-Torrissen, Krisna

Abstract

Digestive enzymes and their effects on in vitro digestibility of feeds and feedstuffs, as well as on growth performance quality were studied in Siamese fighting fish (Betta splendens Regan, 1910). The specific activities of total protease, amylase, trypsin and chymotrypsin increased during development and were higher in females than in males at maturation (P < 0.05). The activity ratio of trypsin to chymotrypsin corresponded to fish growth, and showed lower values in females than in males. White muscle levels of RNA decreased during development, with females having higher levels than males, while the protein levels increased with no difference between sexes. In the oocytes, trypsin-like and chymotrypsin-like specific activities were very low, and the concentrations of RNA, protein and protein/lipid ratio were higher than in the muscle. For in vitro digestibility, wheat gluten, soybean meal and fish meal were among good protein sources while the meals from peanut, fish and soybean were good carbohydrate sources. Golden apple snail meat was a good source for both protein and carbohydrate. The crude enzyme extracts from different growth stages and sexes had different abilities to digest the same feeds and feedstuffs. This will make it possible to preliminarily study the authenticated nutritional quality of raw materials for future feed formulations for B. splendens.Keywords: Betta splendens, digestive enzymes, feedstuff, in vitro digestibility, muscle quality, oocyte quality, Siamese fighting fishAfrican Journal of Biotechnology Vol. 12(14), pp. 1689-1702

Published
2016

23. Diversity, biogeography and conservation of freshwater mussels (Bivalvia: Unionida) in East and Southeast Asia

Author

Zieritz, Alexandra, primary, Bogan, Arthur E., additional, Froufe, Elsa, additional, Klishko, Olga, additional, Kondo, Takaki, additional, Kovitvadhi, Uthaiwan, additional, Kovitvadhi, Satit, additional, Lee, Jin Hee, additional, Lopes-Lima, Manuel, additional, Pfeiffer, John M., additional, Sousa, Ronaldo, additional, Van Do, Tu, additional, Vikhrev, Ilya, additional, and Zanatta, David T., additional

Published
2017
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24. Phylogeny of the most species-rich freshwater bivalve family (Bivalvia: Unionida: Unionidae): Defining modern subfamilies and tribes

Author

Lopes-Lima, Manuel, primary, Froufe, Elsa, additional, Do, Van Tu, additional, Ghamizi, Mohamed, additional, Mock, Karen E., additional, Kebapçı, Ümit, additional, Klishko, Olga, additional, Kovitvadhi, Satit, additional, Kovitvadhi, Uthaiwan, additional, Paulo, Octávio S., additional, Pfeiffer, John M., additional, Raley, Morgan, additional, Riccardi, Nicoletta, additional, Şereflişan, Hülya, additional, Sousa, Ronaldo, additional, Teixeira, Amílcar, additional, Varandas, Simone, additional, Wu, Xiaoping, additional, Zanatta, David T., additional, Zieritz, Alexandra, additional, and Bogan, Arthur E., additional

Published
2017
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25. Improving the nutritive value of mulberry leaves, Morusspp. (Rosales: Moraceae) for silkworm larvae, Bombyx mori(Lepidoptera: Bombycidae) using gamma irradiation

Author

Chundang, Pipatpong, Thongprajukaew, Karun, Kovitvadhi, Uthaiwan, Chotimanothum, Banthari, Kovitvadhi, Attawit, and Pakkong, Pannee

Abstract

The nutritive value and in vitrodigestibility using the digestive enzyme extracts from different stages of silkworm larvae (Bombyx mori) were evaluated in different leaf positions (1, 2, 3, 4, or 5) of mulberry leaves (Morusspp.) with or without gamma irradiation treatment (native vs. irradiated). At least one of studied factors and their interaction had effects on the overall proximate composition and physicochemical properties (p< 0.05), in terms of water absorption index, water solubility, swelling power, pH, relative crystallinity, and FT-IR spectra. Cellulase activity was significantly decreased with larval stage, while a similar pattern was observed for amylase activity, but with relatively low activity in the first stage. The highest trypsin activity was observed in the fourth stage, followed by the second and fifth stages. These changes across the five larval stages could have significant effects on the in vitrodigestibility of protein (IVPD) and carbohydrate (IVCD), as well as the effect of leaf position on IVCD. However, significant improvements in IVPD and IVCD were obtained for irradiated leaves relative to the control native leaves, independent of all studied factors.

Published
2020
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28. Qualitative and quantitative insights into the 3D microanatomy of the nervous ganglia of Scrobicularia plana (Bivalvia: Tellinoidea: Semelidae).

Author

Tantiwisawaruji, Sukanlaya, Kovitvadhi, Uthaiwan, Pardal, Miguel Ângelo, Rocha, Maria João, and Rocha, Eduardo

Abstract

The nervous system of bivalves is bilaterally symmetrical and consists of interconnected cerebropleural, pedal and visceral ganglia, which may be partially to totally fused. We studied the microanatomy of the ganglia ofScrobicularia planausing three-dimensional (3D) reconstruction. We also examined whether intersex differences in the neural structure exist. Each type of ganglion had a characteristic 3D shape, and the cerebropleural ganglia shape was slightly asymmetrical. The visceral, pedal and cerebropleural ganglia are progressively smaller in volume, but only the pedal ganglion volume was positively correlated with the animal’s length, height or width; suggesting functional implications. As to total surface area, correlations were found for the cerebropleural and visceral ganglia, but it was the visceral that consistently showed strong positive correlations with each biometric parameter. The medulla may often penetrate the cortex and touch the capsule in areas that (contrary to what might be expected) are not connected with emerging nerves. Despite the differences in volume and surface area among ganglia, the volume ratio of cortex/medulla is fairly stable (c. 1.5), suggesting a functional optimum. Finally, we conclude that the ganglia of males and females do not show significant quantitative differences. [ABSTRACT FROM PUBLISHER]

Published
2018
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32. Growth and Survival of Juvenile Freshwater Mussel, Chamberlainia hainesiana (Lea, 1856), at Three Densities in the Natural Reservoir and River Environments, Thailand.

Author

Kovitvadhi, Uthaiwan, Kovitvadhi, Satit, and Meejui, Oamduen

Subjects
FRESHWATER mussels, RIVERS, FISH growth, METAMORPHOSIS, PHYTOPLANKTON
Abstract

The effects of location and density on the growth and survival of juvenile freshwater pearl mussel, Chamberlainia hainesiana, 150-360 d after metamorphosis were investigated to determine the optimal ranges for commercial farming in Thailand. Juveniles were reared outdoors in two locations (the Mae Klong Reservoir and the Khwae Yai River, Kanchanaburi Province). Three density levels (25, 50, and 100 mussels/basket) were established at each location, with three replicates per density level. Phytoplankton from the water column in the natural habitats served as feed; no supplemental feed was provided. The mussels cultured in the reservoir had significantly higher growth rates than those cultured in the river ( P < 0.01). The density level of 25 mussels/basket exhibited the highest average growth rates (in weight, length, height, and width per day). The density levels of 25 and 50 mussels/basket did not show significant differences in growth from each other ( P > 0.05), but both showed significant differences in growth from the density level of 100 mussels/basket ( P < 0.01). [ABSTRACT FROM AUTHOR]

Published
2017
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33. Microwave irradiation and pelleting method affected feed chemical composition and growth performance and feed utilization of sex-reversed Nile tilapia, Oreochromis niloticus (L.).

Author

Sansuwan, Kanokwan, Kovitvadhi, Satit, Thongprajukaew, Karun, Ozório, Rodrigo O A, Somsueb, Pisamai, and Kovitvadhi, Uthaiwan

Subjects
MICROWAVE radiometry, PELLETIZING, COMPOSITION of feeds, NILE tilapia, FISH growth, PHYSIOLOGY
Abstract

Microwave processing and pelleting methods were assessed to improve aquafeed quality for sex-reversed Nile tilapia. The 2 × 3 experimental feeds were prepared with and without microwave irradiation of ingredients prior to pelleting with either a meat mincer, extruder or steam conditioner followed by a meat mincer. Five feedstuff ingredients, including fish meal, meat and bone meal, soybean meal, broken rice and rice bran, were irradiated separately at optimal times, according to the third-order polynomial regression analysis between in vitro digestibility and microwave irradiation times ( r = 0.681-0.942, P < 0.001, n = 42). The prepared feeds were studied for chemical compositions and responses in fish growth performance and feed utilization efficiency. The fish (1.57 ± 0.01 g initial weight) were fed ad libitum for 4 months. All proximate chemical compositions of experimental feeds, except protein, were influenced by microwave processing, pelleting methods or their interaction ( P < 0.05). There were no significant effects from either parameter on water quality during the fish trial. Fish fed steamed microwave-irradiated feed, mechanically pelleted with a meat mincer, showed the highest growth performance (weight gain 18.91 ± 0.73 g and specific growth rate 2.15 ± 0.26% day−1) and feed utilization efficiency (feed conversion ratio 1.31 ± 0.05 g feed g gain−1 and protein efficiency ratio 2.27 ± 0.08 g gain g protein−1) compared with the other dietary groups. These findings indicate that microwave irradiation of feed ingredients prior to steam conditioning followed by mincing can improve aquafeed production quality. [ABSTRACT FROM AUTHOR]

Published
2017
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