Early growth and development of reciprocal hybrids of the starry flounder Platichthys stellatus and stone flounder Kareius bicoloratus. Issue 5 (May 2014)

• Record Type: Journal Article
• Authors: Yamashita, Y. T.; Aritaki, M.; Kurita, Y.; Tanaka, M.
• Is Part Of: Journal of fish biology. Volume 84:Issue 5(2014)
• Page Start: 1503
• Page End: 1518
• Publication Date: 2014-05
• Subjects: Fishes -- Periodicals; Fishes -- Great Britain -- Periodicals; 597
• DOI: 10.1111/jfb.12376
• Languages: English
• ISSNs: 0022-1112

Abstract

<abstract abstract-type="main" id="jfb12376-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p id="jfb12376-para-0001">Larval growth and development of hybrid flounder were observed and compared with those of their parent species. The reciprocal hybrids of female starry flounder <italic>Platichthys stellatus</italic> and male stone flounder <italic>Kareius bicoloratus</italic> (hybrid Sb) and of female <italic>K. bicoloratus</italic> and male <italic>P. stellatus</italic> (hybrid Bs) both survived and grew to juveniles. Development was divided into nine stages (A–I). Many of the hybrids' traits were identical and intermediate to those of their parents. The position of the eye, however, was primarily sinistral in both hybrids (80% in Sb and 76% in Bs), a trait possessed by <italic>P. stellatus</italic> (80%) in the western Pacific Ocean. The daily growth rates of the larvae were similar. In the parent species, development was more rapid in <italic>P. stellatus</italic> than in <italic>K. bicoloratus</italic> whereas rate of development was intermediate in both Sb and Bs hybrids. The size at settlement [standard length (<italic>L</italic><sub>S</sub>) at stage H (mean ± <sc>s.d.</sc>)] was 9·82 ± 1·47 mm for the hybrid Sb and 9·99 ± 0·90 mm for the hybrid Bs, while the minimum age at metamorphosis (initial age at stage H) was 29 days after hatching (DAH) in both hybrids. In comparison, <italic>L</italic><sub>S</sub> at settlement in parent species was 6·43 ± 0·25 mm for <italic>P. stellatus</italic> and 12·87 ± 1·29 mm for <italic>K. bicoloratus</italic>. Minimum age at metamorphosis for the parents was 23 DAH at stage G in <italic>P. stellatus</italic> and 34 DAH at stage H in <italic>K. bicoloratus</italic>. Thus, the timing of settlement of hybrids was different from that of their parent species. These traits may occur with high frequency in a natural habitat.</p> </abstract>