| Changes in the scotopic vision of juvenile Pacific bluefin tuna (Thunnus orientalis) with growth. | |
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MedLine Citation:
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PMID: 21331803 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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In cultured juvenile Pacific bluefin tuna (Thunnus orientalis), reducing the mass deaths caused by collision or contact with tank or net walls at night is a priority for seedling production. Pacific bluefin tuna is a visually dependant species, although its scotopic vision is poor. We recorded electroretinograms to investigate the visual function with growth in the dark-adapted eyes of juvenile Pacific bluefin tuna. Peak wavelengths of spectral sensitivity [38-62 days posthatch (dph), 77-167 mm standard length (SL)] were observed between 474 and 494 nm. Visual light sensitivity has a tendency to increase slightly with growth at 28-64 dph in individuals that measured 29-175 mm SL. However, visual temporal resolution did not significantly increase with growth at 38-62 days dph in individuals that measured 77-167 mm SL. These results suggest that the mass death continues between 28 and 64 dph because of low visual function and increasing swimming speed with growth. |
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Authors:
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Taro Matsumoto; Tokihiko Okada; Yoshifumi Sawada; Yasunori Ishibashi |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-2-18 |
Journal Detail:
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Title: Fish physiology and biochemistry Volume: - ISSN: 1573-5168 ISO Abbreviation: - Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-2-18 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100955049 Medline TA: Fish Physiol Biochem Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Fisheries, Faculty of Agriculture, Kinki University, Naka-Machi, Nara, 631-8505, Japan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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