Temperature effects on early development and occurrence of metamorphosis-related morphological abnormalities in hatchery-reared brown sole Pseudopleuronectes herzensteini

• Published in: Aquaculture Vol. 240; no. 1; pp. 517 - 530
• Main Authors: Aritaki, Masato, Seikai, Tadahisa
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 27.10.2004; Elsevier Science; Elsevier Sequoia S.A
• Subjects: Animal aquaculture; animal growth; animal morphology; Animal productions; Aquaculture; Biological and medical sciences; Brown sole Pseudopleuronectes herzensteini; developmental stages; duration; Early development; Fish; fish culture; fish farms; Fish hatcheries; fish larvae; Fundamental and applied biological sciences. Psychology; General aspects; Growth; hatcheries; Marine; marine fish; metamorphosis; Metamorphosis-related morphological abnormalities; mortality; Pseudopleuronectes; Pseudopleuronectes herzensteini; Temperature; Temperature effects; Brown sole Pseudopleuronectes herzensteini; Temperature; Metamorphosis-related morphological abnormalities; Growth; Early development; Hatchery; Marine environment; Vertebrata; Pisces; Morphology; Development; Metamorphosis; Aquaculture
• ISSN: 0044-8486; 1873-5622
• DOI: 10.1016/j.aquaculture.2004.06.033

The objectives of the present study are to elucidate the effects of rearing temperatures on early larval development and the occurrence of metamorphosis-related morphological abnormalities in hatchery-reared brown sole Pseudopleuronectes herzensteini. Newly hatched larvae were reared through metamorphosis at different temperatures (6, 9, 12, 15, 18, 21, and 24 °C). Growth and development of larvae were accelerated concomitant with higher temperatures. Metamorphosed juveniles were classified into four morphological categories as normal, pseudoalbinism (two types), and ambicoloration, in combination with body color (pigmentation) and eye location. Incidence of normal morphology was lowest (11–24%) and that of pseudoalbinism was highest (74–83%) at 12 °C. The highest incidence of normal morphology (51–73%) was obtained at 21 °C. Although occurrence of ambicoloration was very low in all temperature regimes (0–10%), it increased slightly with increasing temperatures. Results of the present study strongly suggested that rearing temperature during the larval period affected the appearance of normal fish because of the different larval growth and development.