Nav: Home

'Handedness' in scale-eating fish: Nature and nurture

September 14, 2017

Nagoya, Japan - The preference for using one side of the body over the other, as observed typically in human handedness, is referred to as behavioral laterality. Increasing numbers of studies are revealing that, aside from humans, other vertebrates, and even invertebrates, exhibit at least some degree of handedness.

Behavioral laterality is advantageous to foraging, defending against competitors, being vigilant against predators, or attending to prospective mates. While lateralized behaviors are thought to be strengthened over time, it remains unclear how they are acquired during development.

Yoichi Oda of Nagoya University and Yuichi Takeuchi of the University of Toyama have now revealed how and when behavioral laterality arises. They did this by using the scale-eating predator cichlid Perissodus microlepis (P. microlepis), found in Lake Tanganyika in Africa, at its developing stage. They recently published their findings in Scientific Reports.

"P. microlepis is an attractive model of behavioral laterality because the adult fish exhibits clear asymmetric mouth morphology and conspicuously lateralized predatory behaviour; left- or right-sided attack of the prey fish," study corresponding author Takeuchi says. "Importantly, we successfully bred P. microlepis in our laboratory - a challenging feat by any measure. This has allowed us to investigate how the development of behavioral laterality depends on experience."

The researchers found that nai?ve juvenile P. microlepis with no prior scale-eating experience started attacking prey on both sides, but they gradually tended to attack the side that corresponded to the mouth opening direction during subsequent trials. These findings confirmed the researchers' previous results obtained from stomach content analysis: the stomach contents of early juveniles collected in the same location included scales from both sides, while the scales found in adults were almost all from one side of the prey.

Furthermore, the duo noted naitve adult P. microlepis attacked bi-directionally, as did nai?ve juveniles. This meant acquisition of the lateralized behavior is not age-dependent, but rather, an acquired trait.

Interestingly, the kinetics of body flexion, in terms of maximum amplitude and angular velocity, during a dominant side attack outperformed those of a non-dominant side attack. Thus, the lateral difference in behavioral kinetics is naturally determined.

"Our findings provide qualitative evidence to support the hypothesis that behavioral laterality is reinforced based on experience during development, as well as a new perspective that the stronger side is naturally determined," coauthor Oda says. "The motions and identifiable neural circuits to control the scale-eater's lateralized behavior may provide valuable material for studying the development of behavioral laterality and its underlying brain mechanisms in animals."
-end-
The article, "Lateralized scale-eating behaviour of cichlid is acquired by learning to use the naturally stronger side" was published in Scientific Reports at DOI:10.1038/s41598-017-09342-7

Nagoya University

Related Development Articles:

Development of a novel vaccine for Zika
Research presented by Farshad Guirakhoo, Ph.D., Chief Scientific Officer, GeoVax, Inc., at the ASM Microbe 2017 meeting showed a new Zika virus vaccine that gives 100 percent protection in mice.
New insight into brain development disorder
Two years ago, the Zika virus drew attention to microcephaly, a developmental disorder in which the brain and skull display inhibited growth.
A closer look at brain organoid development
Researchers already have succeeded in growing so-called 'cerebral organoids' in a dish -- clusters of cells that self-organize into small brain-like structures.
New method in synthesis and development for pharmaceuticals
The work by Prof. Cheol-Min Park (School of Natural Science) at Ulsan National Institute of Science and Technology (UNIST) has been selected to appear on the front cover of the prestigious journal, ChemComm.
Development of a novel carbon nanomaterial 'pot'
A novel, pot-shaped, carbon nanomaterial developed by researchers from Kumamoto University, Japan is several times deeper than any hollow carbon nanostructure previously produced.
Too much 'noise' can affect brain development
Using cutting-edge imaging technology, University of California, Irvine biologists have determined that uncontrolled fluctuations (known as 'noise') in the concentration of the vitamin A derivative retinoic acid can lead to disruptions in brain organization during development.
Master switch for brain development
Scientists at the Institute of Molecular Biology in Mainz have unraveled a complex regulatory mechanism that explains how a single gene can drive the formation of brain cells.
Bridging the biomedical development gap
To date, the Blavatnik Biomedical Accelerator has provided $12.5 million to support 68 research projects, approximately half of which have led to industry partnerships.
What clinicians need to know about bilingual development in children
Bilingual children pose unique challenges for clinicians, and, until recently, there was little research on young bilinguals to guide clinical practice.
Have we achieved the millennium development goals?
As the deadline for the millennium development goals approaches, experts writing in The BMJ this week take stock of the successes, failures, and oversights, and look ahead to the next phase -- the sustainable development goals.

Related Development Reading:

The Age of Sustainable Development
by Jeffrey D. Sachs (Author), Ki-moon Ban (Foreword)

Jeffrey D. Sachs is one of the world's most perceptive and original analysts of global development. In this major new work he presents a compelling and practical framework for how global citizens can use a holistic way forward to address the seemingly intractable worldwide problems of persistent extreme poverty, environmental degradation, and political-economic injustice: sustainable development.

Sachs offers readers, students, activists, environmentalists, and policy makers the tools, metrics, and practical pathways they need to achieve Sustainable Development Goals. Far more than a... View Details


Development: Infancy Through Adolescence (Available Titles CengageNOW)
by Laurence Steinberg (Author), Deborah Lowe Vandell (Author), Marc H. Bornstein (Author)

This authoritative text provides you with an integrated perspective on child development that synthesizes biological, social, cultural, and socioeconomic influences. The combined features that distinguish it from other titles can be summarized with an acronym: CARE (Cutting edge research, Applied developmental science, Readability, Essential knowledge). Written in an engaging manner by respected child development experts, the book incorporates both classic and cutting-edge research. At the same time, it emphasizes the application of developmental psychology to real world problems, focusing on... View Details


Development Through the Lifespan (6th Edition) (Berk, Lifespan Development Series) Standalone Book
by Laura E. Berk (Author)

Laura Berk’s Development Through the Lifespan is relied upon in classrooms worldwide for its clear, engaging writing style, exceptional multicultural and cross-cultural focus, cutting-edge consideration of the interrelationships between heredity and environment, rich examples, and long-standing commitment to presenting the most up-to-date scholarship. This new edition continues to offer students research-based practical applications that they can relate to their personal and professional lives.

 

View Details


Organization Development and Change
by Thomas G. Cummings (Author), Christopher G. Worley (Author)

Market-leading ORGANIZATION DEVELOPMENT AND CHANGE, 10th Edition blends rigor and relevance in a comprehensive and clear presentation. The authors work from a strong theoretical foundation to describe, in practical terms, how behavioral science knowledge can be used to develop organizational strategies, structures, and processes. View Details


Exploring Lifespan Development (3rd Edition) (Berk, Lifespan Development Series)
by Laura E. Berk (Author)

Visit the Showcase Site to see sample chapters, get information on the supplements (including sample videos and online simulations), and much more.

 

This shorter, essentials version of Berk’s best-selling Development Through the Lifespan, 6/e, covers the same topics and contains the same number of chapters, but presents only the essential information with an exceptionally strong emphasis on applications. Exploring Lifespan Development includes all the features Berk’s texts are known... View Details


Role Development in Professional Nursing Practice
by Kathleen Masters (Author)

Role Development in Professional Nursing Practice, Fourth Edition continues to leverage the Nurse of the Future competency model and maintains a focus on the socialization of the professional role. The Fourth Edition also incorporates additional concepts and competencies that have become essential for BSN prepared nurses, such as quality improvement, safety, patient-centered care, teamwork and collaboration, evidence-based practice, and informatics. Also included is information related to national patient safety goals and other national patient safety initiatives.

Key Features

... View Details


Child Development, 9Th Edn
by L.E.Berk. (Author)

Pearson India Edition View Details


The Sales Development Playbook: Build Repeatable Pipeline and Accelerate Growth with Inside Sales
by Trish Bertuzzi (Author)

Raise your hand if your company needs more new customers.

I suspect your hand is (figuratively) up. This book is about not just growth, but high-growth, explosive-growth, the kind of growth that weather satellites can see from space.

The success of any business-to-business company is directly linked to how effectively they acquire new pipeline. To skyrocket growth, sales development is the answer.

This book encapsulates author Trish Bertuzzi's three decades of practical, hands-on experience. It presents six elements for building new pipeline and... View Details


Human Development: A Life-Span View
by Robert V. Kail (Author), John C. Cavanaugh (Author)

Balanced coverage of the entire life span is just one thing that distinguishes HUMAN DEVELOPMENT: A LIFE-SPAN VIEW, Seventh Edition. With its comprehensive, succinct, and applied coverage, the book has proven its ability to capture readers' interest while introducing them to the issues, forces, and outcomes that make us who we are. The material is relevant, too: Readers gain the foundations in important theories and research that enable them to become educated interpreters of developmental information. In addition, basic and applied research along with controversial topics and emergent trends... View Details


Life-Span Human Development
by Carol K. Sigelman (Author), Elizabeth A. Rider (Author)

Known for its clear, straightforward writing style, comprehensive coverage, strong and current research-based approach, and excellent visuals and tables, this life-span development text offers a topical organization at the chapter level and a consistent chronological presentation within each chapter. Each chapter focuses on a domain of development such as physical growth, cognition, or personality, and traces developmental trends and influences in that domain from infancy to old age. Within each chapter, you will find sections on four life stages: infancy, childhood, adolescence, and... View Details

Best Science Podcasts 2018

We have hand picked the best science podcasts for 2018. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Peering Deeper Into Space
The past few years have ushered in an explosion of new discoveries about our universe. This hour, TED speakers explore the implications of these advances — and the lingering mysteries of the cosmos. Guests include theoretical physicist Allan Adams, planetary scientist Sara Seager, and astrophysicists Natasha Hurley-Walker and Jedidah Isler.
Now Playing: Science for the People

#461 Adhesives
This week we're discussing glue from two very different times. We speak with Dr. Jianyu Li about his research into a new type of medical adhesive. And Dr. Geeske Langejans explains her work making and investigating Stone Age and Paleolithic glues.