Population Dynamics of the Sea Slug Plakobranchus ocellatus (Opisthobranch: Sacoglossa: Elysioidea) on a Subtropical Coral Reef off Okinawa-jima Island, Ryukyu Archipelago, Japan.

  title={Population Dynamics of the Sea Slug Plakobranchus ocellatus (Opisthobranch: Sacoglossa: Elysioidea) on a Subtropical Coral Reef off Okinawa-jima Island, Ryukyu Archipelago, Japan.},
  author={Daisuke Tanamura and Euichi Hirose},
  journal={Zoological studies},
Daisuke Tanamura and Euichi Hirose (2016) Plakobranchus ocellatus is a sacoglossan sea slug that can retain functional chloroplast from its algal food. This species feed on multiple species of siphonous green algae and can survive several months without food by utilizing retained chloroplasts in its digestive gland (kleptoplasty). While the population dynamics of opisthobranchs are often influenced by the seasonal fluctuation of the abundance of food resources, the fluctuation of food… 
Seasonality and Longevity of the Functional Chloroplasts Retained by the Sacoglossan Sea Slug Plakobranchus ocellatus van Hasselt, 1824 Inhabiting A Subtropical Back Reef Off Okinawa-jima Island, Japan.
The results indicated the kleptoplasts of P. ocellatus functioned normally for several months and maintained the presence of this sacoglossan in a subtropical environment throughout the year.
Seasonal Occurrence of Gastropterids (Gastropoda: Cephalaspidea) and Their Habitat Selection in a Subtropical Back-reef on Okinawajima Island (Ryukyu Archipelago, Japan).
Daisuke Tanamura and Euichi Hirose (2017) Gastropterids are generally small sea slugs with vivid colors. In a shallow back-reef at Zanpa (Okinawajima Island, Ryukyu Archipelago), ve gastropterid
Algal Sources of Sequestered Chloroplasts in the Sacoglossan Sea Slug Elysia crispata Vary by Location and Ecotype
Variation in diet between locations suggests that the slugs may be exhibiting local adaptation in their dietary choices, and it highlights ecological differences between the Caribbean-wide reef-dwelling ecotypes and the mangrove lagoon ecotypes found in the Florida Keys.
On the Plakobranchidae (Gastropoda, Sacoglossa) from soft sediment habitats of Koh Tao, Gulf of Thailand, with descriptions of two new species
The initial findings of an expanded survey effort from the waters around Koh Tao are provided, with the identity of two soft sediment-associated sacoglossan species in the family Plakobranchidae being investigated.
Sea Slugs—“Rare in Space and Time”—But Not Always
The term “rare in space and time” is often used to typify the spatial and temporal patterns of occurrence of heterobranch sea slugs. However, “rare” in this context has not been clearly defined. In


What remains after 2 months of starvation? Analysis of sequestered algae in a photosynthetic slug, Plakobranchus ocellatus (Sacoglossa, Opisthobranchia), by barcoding
It is shown here that at least two (or possibly three) barcode markers are required to cover the entire food spectrum in future analyses of Sacoglossa, and it is suggested that P. ocellatus is a species complex and feeds on a broad variety of Ulvophyceae.
Algivore or Phototroph? Plakobranchus ocellatus (Gastropoda) Continuously Acquires Kleptoplasts and Nutrition from Multiple Algal Species in Nature
The results suggest that natural populations of P. ocellatus do not rely on photosynthesis but mainly on the digestion of ingested algae, and that kleptoplast photosynthates form a significant source of nutrition for starved sea slugs.
Biogeography of the Sacoglossa (Mollusca, Opisthobranchia)*
The decrease in number of species with latitude is spectacular, and the number of cold-water endemics is very low, indicating that sacoglossans in cold tempe- rate regions are mostly eurythermic warm water/ tropical species.
Digestive System of the Sacoglossan Plakobranchus ocellatus (Gastropoda: Opisthobranchia): Light- and Electron-Microscopic Observations with Remarks on Chloroplast Retention
  • E. Hirose
  • Biology, Medicine
    Zoological science
  • 2005
The sea slug apparently provides a favorable environment to support the long-term retention and function of chloroplasts, and numerous microvilli filling the lumen of the digestive gland suggest that molecules are actively transferred within the gland.
Reef coral reproduction in the eastern Pacific: Costa Rica, Panamá and Galápagos Islands (Ecuador). IV. Agariciidae, recruitment and recovery of Pavona varians and Pavona sp.a
Abstract The reproductive ecology of two eastern Pacific zooxanthellate coral species was examined as part of a continuing series of studies relating bleaching/mortality events caused by the El
Retention of functional chloroplasts in some sacoglossans from the Indo-Pacific and Mediterranean
P Pulse Amplitude Modulated Fluorometry is used to measure the quantum yield of charge separation in photosystem II in dark acclimated cells (ΦIIe) to detect the status of photosynthetic activity and propose eight different levels of retention abilities of non-functional and functional chloroplasts in sacoglossans.
Symbiosis in sacoglossan opisthobranchs: functional capacity of symbiotic chloroplasts
Two species of Sacoglossa, Elysia hedgpethiMarcus and Placobranchus ianthobapsusGould, were compared as to their abilities to retain functional chloroplasts in their tissues and the ability to incorporate 14CO2 showed a decrease.
Effects of photosynthesis on the survival and weight retention of two kleptoplastic sacoglossan opisthobranchs
Results indicate that P. ocellatus benefits from photosynthesis for survival and growth, whereas E. trisinuata does not under starved conditions, and this interspecific difference is likely related to the period of functional chloroplast retention.
Distribució en l'espai i en el temps dels opistobranquis ibèrics, amb especial referència als del litoral català
Some data on the geographic, bathimetric and annual distribution of the Opisthobranchs inhabiting the Iberian coasts are presented. These data come from a previous fouryear survey (ROS, 1975) and
Extended breeding and recruitment periods of fishes on a low latitude coral reef
It is shown that fish recruitment in Kimbe Bay is much less seasonal than is typically described for higher latitude coral reefs, and there are consistent family-wide recruitment strategies that may play a significant role in the dynamics of populations in equatorial waters.