Counterillumination in the Hawaiian bobtail squid, Euprymna scolopes Berry (Mollusca: Cephalopoda)

  title={Counterillumination in the Hawaiian bobtail squid, Euprymna scolopes Berry (Mollusca: Cephalopoda)},
  author={B. W. Jones and Michele K. Nishiguchi},
  journal={Marine Biology},
The mutualism between the Hawaiian bobtail squid Euprymna scolopes and the luminescent symbiont Vibrio fischeri has been used extensively as a model system for studies ranging from co-speciation and biogeography to gene regulation and the evolution of pathogenesis. In this association, the luminescent bacterium V. fischeri is housed in a complex light organ within the mantle cavity of E. scolopes. Prior hypotheses have assumed that sepiolid squids in general utilize the bioluminescence produced… 
Vascular architecture in the bacteriogenic light organ of Euprymna tasmanica (Cephalopoda: Sepiolidae).
  • A. Patelunas, M. Nishiguchi
  • Biology, Environmental Science
    Invertebrate biology : a quarterly journal of the American Microscopical Society and the Division of Invertebrate Zoology/ASZ
  • 2018
A framework to understand how beneficial bacteria influence the development of a eukaryotic closed vascular network is provided and insight to the evolutionary developmental dynamics that form during mutualistic interactions is provided.
A lasting symbiosis: how the Hawaiian bobtail squid finds and keeps its bioluminescent bacterial partner
This Review synthesizes the results of recent research on the light-organ association and describes the development of new horizons for E. scolopes as a model organism that promises to inform biology and biomedicine about the basic nature of host–microorganism interactions.
Nocturnal Acidification: A Coordinating Cue in the Euprymna scolopes–Vibrio fischeri Symbiosis
Events that lead up to the nocturnal acidification of the light organ and the cues used for pre-adaptive behaviors that both host and symbiont have evolved are discussed.
It is shown that nonnative V. fischeri are capable of rapid adaptation to novel sepiolid squid hosts by serially passaging V.fischeri JRM200 (native to Hawaiian Euprymna scolopes) lines through the novel Australian squid host E. tasmanica.
Phylogenomics illuminates the evolution of bobtail and bottletail squid (order Sepiolida)
It is demonstrated that sepiolids radiated after the Late Cretaceous and that major biogeographic events might have shaped their distribution and speciation.
Population structure between environmentally transmitted vibrios and bobtail squids using nested clade analysis
This study examined the variation and history of three allopatric Euprymna squid species and their respective Vibrio symbionts to highlight the importance of how interactions between symbiotic organisms can unexpectedly shape population structure in phylogeographical studies.
Colonization of Euprymna scolopes squid by Vibrio fischeri.
A method to assess the degree of colonization that occurs when newly hatched aposymbiotic E. scolopes are exposed to (artificial) seawater containing V. fischeri and the Hawaiian bobtail squid is described.
Phylogeographical Patterns among Mediterranean Sepiolid Squids and Their Vibrio Symbionts: Environment Drives Specificity among Sympatric Species
The findings suggest that physical boundaries and distance in relation to population size, and not host specificity, are important factors in limiting or defining gene flow within sympatric marine squids and their associated bacterial symbionts in the Mediterranean Sea.
The Role of Hemocytes in the Hawaiian Bobtail Squid, Euprymna scolopes: A Model Organism for Studying Beneficial Host–Microbe Interactions
This mini review will recapitulate what is known about the role of hemocytes in the light organ association and offer future directions for understanding how these immune cells interact with multiple types of symbioses.
The Vibrio fischeri–Euprymna scolopes Light Organ Symbiosis
The observation that lipopolysaccharide and peptidoglycan monomer stimulate developmental processes in a mutualistic animal-bacteria association is notable for at least two reasons, which suggests conserved mechanisms for mutualist and pathogen detection by animals, with host responses being context dependent.


Bioluminescence in the symbiotic squid Euprymna scolopes is controlled by a daily biological rhythm
A model encompassing the currently available evidence is proposed for the control of growth and luminescence activity in the E. scolopes/V.
Sampling the light-organ microenvironment of Euprymna scolopes: description of a population of host cells in association with the bacterial symbiont Vibrio fischeri.
Assays of the viability of expelled crypt cells revealed no dead bacterial symbionts and a mixture of live and dead host cells, and analyses of the ultrastructure, biochemistry, and phagocytic activity of a subset of the host cell population suggested that some of these cells are macrophage-like molluscan hemocytes.
Growth and flagellation of Vibrio fischeri during initiation of the sepiolid squid light organ symbiosis
The kinetics of the process by which newly hatched juvenile squids become infected by symbiosis-competent V. fischeri are document here and it is shown that growth rate and flagellation were modulated during establishment of the association.
Bioluminescence in the Deep-Sea Cirrate Octopod Stauroteuthis syrtensis Verrill (Mollusca: Cephalopoda).
The oral position of the photophores and the wavelength of peak emission, coupled with the animals' primary postures, suggests that bioluminescence in S. syrtensis may function as a light lure to attract prey.
The Anatomy and Morphology of the Adult Bacterial Light Organ of Euprymna scolopes Berry (Cephalopoda:Sepiolidae).
The sepiolid squid, Euprymna scolopes, has a bilobed luminous organ in the center of the mantle cavity, associated with the ink sac, and host tissues recruited into the light organ system appear to permit the squid to control the quality of bacterial light emission.
Embryonic Development of the Light Organ of the Sepiolid Squid Euprymna scolopes Berry.
Anatomical and ultrastructural observations of the light organ during embryogenesis indicate that the organ begins development as a paired proliferation of the mesoderm of the hindgut-ink sac complex of the sepiolid squid Euprymna scolopes.
Disruptive counterillumination and its anti-predatory value in the plainfish midshipman Porichthys notatus
Juvenile P. notatus from the Puget Sound population, which lacks a luciferin source and is non-luminous, displayed counterillumination behavior when its luminescent system was activated by force-feeding the fish with dried Vargula hilgendorfi, the first experimental evidence suggesting that counterillsumination is effective as an anti-predatory strategy.
Consequences of evolving with bacterial symbionts : Insights from the squid-vibrio associations
▪ Abstract The squid-vibrio light-organ symbioses, which have been under investigation for just over 10 years, offer the opportunity to decipher aspects of the dynamics of stable associations between
Symbiotic association of Photobacterium fischeri with the marine luminous fish Monocentris japonica; a model of symbiosis based on bacterial studies.
Isolation of bacteria from the luminous organ of the fish Monocentris japonica has revealed that the organ contains a pure culture of luminous bacteria, the first time that P. fischeri has been identified in a symbiotic association.
The escal photophore of ceratioids (Pisces; Ceratioidei) — a review of structure and function
The article deals with the structure and presumed functions of the escal photophore found in the bulbous tip of the cephalic fin ray or illicium, situated on the upper part of the head in