Makoto Omori - Academia.edu (original) (raw)
Papers by Makoto Omori
The Coral Reef Preservation and Rehabilitation Project by the Okinawa Prefectural Government, Jap... more The Coral Reef Preservation and Rehabilitation Project by the Okinawa Prefectural Government, Japan, investigated since 2011 the possibility of large-scale reef restoration with asexually derived corals. The research also sought to establish standard methodologies of active coral reef restoration in Okinawa. During three years of consecutive transplantation from 2012 to 2014, about 31,000 non-nursery-farmed and nursery-farmed corals were out-planted, resulting in gradual refinement of the technique. Small coral colonies collected from neighboring natural reefs were raised as donor corals on top of iron poles 50 cm above the seafloor. Fragments taken from those donor corals were subsequently attached to substrata and transplanted to back-reef moats off Onna Village, Okinawa Island (approximately 26°26’50”N, 127°47’40”E). In 2012 and 2013, 15 and 12 acroporid species, respectively, were transplanted without nursery farming. Whereas in 2014, transplantation focused on six species that ...
This is the second part of our paper “Crustaceans on Postage Stamps” (Omori and Holthuis, 2000). ... more This is the second part of our paper “Crustaceans on Postage Stamps” (Omori and Holthuis, 2000). During the period from 1870 to and including / 5 2002, nearly 1468 postage stamps depicting crustaceans have been issued from 218 countries, regions and organizations. In all, 357 taxa were identified at species or genus level. They are classified into 92 families of the classes Branchiopoda, Maxillopoda and Malacostraca. Our checklist of all stamps with crustaceans is added.
This paper begins with a brief overview of the status of coral reefs of Japan and around the worl... more This paper begins with a brief overview of the status of coral reefs of Japan and around the world, followed by a review concerning present research on coral reef rehabilitation at Akajima Marine Science Laboratory in Okinawa, Japan. With respect to the latter, effort has been aimed at developing techniques for the mass culture of Acropora spp. from eggs. Colonies of Acropora tenuis that were reared from eggs and transplanted to the seabed at Akajima began spawning by approximately 20-25 cm in diameter at 4 or 5 years of age. Many fish and crustaceans have inhabited the newly transplanted coral colonies. This demonstrated the possibilities of culturing using sexual propagation as a technique to assist local coral reef rehabilitation and hence, conservation of marine biodiversity. It is humbling and somewhat depressing to compare the small scale of success relative to the wide range of degradation. However, the present method of coral reef rehabilitation has shown enough promise for ...
Estuarine, Coastal and Shelf Science
Abstract In this present study, we investigated the effects of increase and decrease of light int... more Abstract In this present study, we investigated the effects of increase and decrease of light intensity and photoperiods on growth, survival, and photosynthetic efficiency in three different corals, Pocillopora damicornis (Linnaeus, 1758), Acropora millepora (Ehrenberg, 1834) and Platygyra sinensis (Milne Edwards and Haime, 1849) with different ages (6-, 12-, and 24-month old). All experimented corals were cultured from sexual propagation. In light intensity trials, juvenile corals were transferred and exposed to different treatments (0, 21, 42, 85, and 169 μmol m−2 s−1 provided by 400-W metal halide lamps or equal to daily light integrals (DLI) of 0, 0.95, 1.89, 3.8, and 7.6 μmol m−2 s−1) for 2 weeks, while in the photoperiod experiment, the coral colonies were exposed to 5 different treatments (24/0, 18/6, 12/12, 6/18, and 0/24 h light-and-dark cycle). The results from the light intensity experiment showed that 2-year old Platygyra sinensis survived (100%) under all light intensity levels, while the survival rates of other coral species decreased, ranging between 20 and 80%, when the light intensity levels changed from the ambient light condition. For the photoperiod experiments, the results showed that 2-year old Platygyra sinensis and 1-year old Acropora millepora survived (100%) under all photoperiod levels. However, there was no significant difference on the growth of corals between different light intensity levels and different photoperiods. From this study, Platygyra sinensis seemed to have more tolerance to wider ranges of light intensities and photoperiods than other coral species. In addition, the results implied that corals were able to acclimate to a prolonged light period and light intensity, which can be feasible for future coral aquaculture.
Journal of the Japanese Coral Reef Society
Marine Biology Research
ABSTRACT Coral reef restoration is not the same as forest restoration as its success is not alway... more ABSTRACT Coral reef restoration is not the same as forest restoration as its success is not always guaranteed because of insufficient knowledge of coral biology. The technology of active restoration has a history of only 40 years or less. In spite of many devices and efforts, restoration is often hampered by low survivorship of colonies, fragments or sexual propagules. In order to enhance coral resilience and adaptation in a changing world, many new approaches to coral reef restoration are being suggested. However, we wouldn't be able to succeed or achieve expected result, i.e. recovery and thriving of the coral reefs, if outplanted coral recruits do not grow well and spawn and successfully fertilize in the sea. The cost to restore a few hectares of reef is often considerable. More studies are needed to improve the methodology. Contractors and practitioners of coral reef restoration projects must have advanced techniques supported by strong science for successful propagation, rearing, and transplantation/outplantation of corals. This review describes what we have learned so far from research on active coral reef restoration and discusses seven topics that may facilitate successful restoration projects.
Journal of the Japanese Coral Reef Society
Publications of the Seto Marine Biological Laboratory
Journal of the Oceanographical Society of Japan
Journal of the Oceanographical Society of Japan
Journal of the Oceanographical Society of Japan
Plankton Biology and Ecology, Feb 1, 2002
Plankton Biology and Ecology, Aug 1, 1998
Memoirs of National Institute of Polar Research Special Issue, Feb 1, 1986
Memoirs of National Institute of Polar Research Special Issue, Feb 1, 1986
Plankton Biology and Ecology, Aug 1, 1997
It was 1899 when a red-tide at the head of Suruga Bay was reported and its forming agent identifi... more It was 1899 when a red-tide at the head of Suruga Bay was reported and its forming agent identified as Noctiluca by T. Nishikawa. In the year following this, the first scientific report on plankton in Japan, the terms" plankton" and" planktology" were translated into Japanese ...
Publications of the Seto Marine Biological Laboratory, Nov 29, 1969
PROCEEDINGS OF CIVIL ENGINEERING IN THE OCEAN, 2003
The Coral Reef Preservation and Rehabilitation Project by the Okinawa Prefectural Government, Jap... more The Coral Reef Preservation and Rehabilitation Project by the Okinawa Prefectural Government, Japan, investigated since 2011 the possibility of large-scale reef restoration with asexually derived corals. The research also sought to establish standard methodologies of active coral reef restoration in Okinawa. During three years of consecutive transplantation from 2012 to 2014, about 31,000 non-nursery-farmed and nursery-farmed corals were out-planted, resulting in gradual refinement of the technique. Small coral colonies collected from neighboring natural reefs were raised as donor corals on top of iron poles 50 cm above the seafloor. Fragments taken from those donor corals were subsequently attached to substrata and transplanted to back-reef moats off Onna Village, Okinawa Island (approximately 26°26’50”N, 127°47’40”E). In 2012 and 2013, 15 and 12 acroporid species, respectively, were transplanted without nursery farming. Whereas in 2014, transplantation focused on six species that ...
This is the second part of our paper “Crustaceans on Postage Stamps” (Omori and Holthuis, 2000). ... more This is the second part of our paper “Crustaceans on Postage Stamps” (Omori and Holthuis, 2000). During the period from 1870 to and including / 5 2002, nearly 1468 postage stamps depicting crustaceans have been issued from 218 countries, regions and organizations. In all, 357 taxa were identified at species or genus level. They are classified into 92 families of the classes Branchiopoda, Maxillopoda and Malacostraca. Our checklist of all stamps with crustaceans is added.
This paper begins with a brief overview of the status of coral reefs of Japan and around the worl... more This paper begins with a brief overview of the status of coral reefs of Japan and around the world, followed by a review concerning present research on coral reef rehabilitation at Akajima Marine Science Laboratory in Okinawa, Japan. With respect to the latter, effort has been aimed at developing techniques for the mass culture of Acropora spp. from eggs. Colonies of Acropora tenuis that were reared from eggs and transplanted to the seabed at Akajima began spawning by approximately 20-25 cm in diameter at 4 or 5 years of age. Many fish and crustaceans have inhabited the newly transplanted coral colonies. This demonstrated the possibilities of culturing using sexual propagation as a technique to assist local coral reef rehabilitation and hence, conservation of marine biodiversity. It is humbling and somewhat depressing to compare the small scale of success relative to the wide range of degradation. However, the present method of coral reef rehabilitation has shown enough promise for ...
Estuarine, Coastal and Shelf Science
Abstract In this present study, we investigated the effects of increase and decrease of light int... more Abstract In this present study, we investigated the effects of increase and decrease of light intensity and photoperiods on growth, survival, and photosynthetic efficiency in three different corals, Pocillopora damicornis (Linnaeus, 1758), Acropora millepora (Ehrenberg, 1834) and Platygyra sinensis (Milne Edwards and Haime, 1849) with different ages (6-, 12-, and 24-month old). All experimented corals were cultured from sexual propagation. In light intensity trials, juvenile corals were transferred and exposed to different treatments (0, 21, 42, 85, and 169 μmol m−2 s−1 provided by 400-W metal halide lamps or equal to daily light integrals (DLI) of 0, 0.95, 1.89, 3.8, and 7.6 μmol m−2 s−1) for 2 weeks, while in the photoperiod experiment, the coral colonies were exposed to 5 different treatments (24/0, 18/6, 12/12, 6/18, and 0/24 h light-and-dark cycle). The results from the light intensity experiment showed that 2-year old Platygyra sinensis survived (100%) under all light intensity levels, while the survival rates of other coral species decreased, ranging between 20 and 80%, when the light intensity levels changed from the ambient light condition. For the photoperiod experiments, the results showed that 2-year old Platygyra sinensis and 1-year old Acropora millepora survived (100%) under all photoperiod levels. However, there was no significant difference on the growth of corals between different light intensity levels and different photoperiods. From this study, Platygyra sinensis seemed to have more tolerance to wider ranges of light intensities and photoperiods than other coral species. In addition, the results implied that corals were able to acclimate to a prolonged light period and light intensity, which can be feasible for future coral aquaculture.
Journal of the Japanese Coral Reef Society
Marine Biology Research
ABSTRACT Coral reef restoration is not the same as forest restoration as its success is not alway... more ABSTRACT Coral reef restoration is not the same as forest restoration as its success is not always guaranteed because of insufficient knowledge of coral biology. The technology of active restoration has a history of only 40 years or less. In spite of many devices and efforts, restoration is often hampered by low survivorship of colonies, fragments or sexual propagules. In order to enhance coral resilience and adaptation in a changing world, many new approaches to coral reef restoration are being suggested. However, we wouldn't be able to succeed or achieve expected result, i.e. recovery and thriving of the coral reefs, if outplanted coral recruits do not grow well and spawn and successfully fertilize in the sea. The cost to restore a few hectares of reef is often considerable. More studies are needed to improve the methodology. Contractors and practitioners of coral reef restoration projects must have advanced techniques supported by strong science for successful propagation, rearing, and transplantation/outplantation of corals. This review describes what we have learned so far from research on active coral reef restoration and discusses seven topics that may facilitate successful restoration projects.
Journal of the Japanese Coral Reef Society
Publications of the Seto Marine Biological Laboratory
Journal of the Oceanographical Society of Japan
Journal of the Oceanographical Society of Japan
Journal of the Oceanographical Society of Japan
Plankton Biology and Ecology, Feb 1, 2002
Plankton Biology and Ecology, Aug 1, 1998
Memoirs of National Institute of Polar Research Special Issue, Feb 1, 1986
Memoirs of National Institute of Polar Research Special Issue, Feb 1, 1986
Plankton Biology and Ecology, Aug 1, 1997
It was 1899 when a red-tide at the head of Suruga Bay was reported and its forming agent identifi... more It was 1899 when a red-tide at the head of Suruga Bay was reported and its forming agent identified as Noctiluca by T. Nishikawa. In the year following this, the first scientific report on plankton in Japan, the terms" plankton" and" planktology" were translated into Japanese ...
Publications of the Seto Marine Biological Laboratory, Nov 29, 1969
PROCEEDINGS OF CIVIL ENGINEERING IN THE OCEAN, 2003