Otolith development in larval and juvenile Schizothorax davidi: ontogeny and growth increment characteristics

Yan, Taiming; Hu, Jiaxiang; Cai, Yueping; Xiong, Sen; Yang, Shiyong; Wang, Xiongyan; He, Zhi

doi:10.1007/s00343-017-6138-x

Cited by 5 publications

(7 citation statements)

References 28 publications

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“…A few studies on cyprinids mentioned the possibility of reliably using both the sagitta and lapillus for the youngest individuals (Vilizzi, ; Yan et al ., ), but our results confirm previous studies highlighting that the sagitta becomes too fragile when it develops rostra (Morioka & Kaunda, ; Morioka & Matsumoto, ). Our results on S. cephalus confirming the unsuitability of the asteriscus are also consistent with findings on other cyprinid species (Vilizzi, ; Escot & Granado‐Lorencio, ; Yan et al ., ).…”

Section: Discussionsupporting

confidence: 92%

“…In this study, we observed that the lapilli and sagittae were present at hatching and the asterisci formed between 20 and 30 dph. These observations coincide with other studies on cyprinids reporting the formation of lapilli and sagittae well before hatching (Černý, 1977;Yan et al, 2017), as well as the late appearance of asterisci (Vilizzi, T A B L E 2 Fish total length (L T ) and daily growth rate estimates of slow and fast growing groups by age classes. Sampling size are also indicated (n) as well as the result from the MANOVA test on the otolith mean shape between slow and fast growing groups 1998; Morioka & Matsumoto, 2007).…”

Section: Otolith Developmentsupporting

confidence: 89%

“…Increment counts also confirmed daily increments deposition in otolith of S. cephalus . These results are consistent with previous findings on larval and juvenile cyprinids (Morioka & Matsumoto, ; Ding et al ., ; Yan et al ., ).…”

Section: Discussionmentioning

confidence: 99%

“…In this study, we observed that the lapilli and sagittae were present at hatching and the asterisci formed between 20 and 30 dph. These observations coincide with other studies on cyprinids reporting the formation of lapilli and sagittae well before hatching (Černý, ; Yan et al ., ), as well as the late appearance of asterisci (Vilizzi, ; Morioka & Matsumoto, ). In S. cephalus and probably in all cyprinids (Vilizzi, ; Neuman et al ., ; Schulz‐Mirbach & Reichenbacher, ), the lapillus appears as the most suitable otolith to study.…”

Section: Discussionmentioning

confidence: 99%

“…The validation process is therefore essential to estimate fish age precisely. Previous validation studies on a dozen other cyprinids have shown the deposition of both daily and annual increments in otoliths (Victor & Brothers, 1982;Durham & Wilde, 2008;Ding et al, 2015;Yan et al, 2017;Huang et al, 2017), but a specific validation for each species is still required to avoid misinterpretation (Van Oosten, 1941;Beamish & McFarlane, 1983).…”

Section: Validation Of Daily Incrementmentioning

confidence: 99%

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Otolith shape analysis and daily increment validation during ontogeny of larval and juvenile European chub Squalius cephalus

Bounket

Gibert

Gennotte³

et al. 2019

Journal of Fish Biology

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This assesses features of otoliths from laboratory‐reared embryos, larvae and juvenile European chub Squalius cephalus from hatching to 180 days post‐hatching (dph). We observed the development of the three pairs of otoliths (lapilli, sagittae and asterisci) and more precisely shape changes, as well as timing and deposition rate of increments of the lapilli. The lapilli and the sagittae were present at hatching, whereas the asterisci formed between 20 and 30 dph. The lapillus and sagitta shapes were round until 20 dph. From 60 dph the anterior and the posterior rostra of the sagittae were well developed, but very thin, making this otolith too fragile to manipulate for further studies of shape and validation of otolith increment deposition rate. The lapilli provided reliable age estimates for free embryos, larvae and juveniles up to 120 dph. However, caution should be taken when ageing fish older than 150 dph as an underestimation was noticeable. The regression of the number of otolith increments on age showed a slope and an intercept not significantly different from 1 and 0, respectively, which indicated that otolith growth increments were deposited on a daily basis, with the first microincrement occurring at hatching. Increment counts were consistent between three interpreters, indicating a consistent and reliable age estimate. This study validates that the otolith increment deposition rate can be used to assess hatching dates and daily growth of wild S. cephalus under 150 dph and in environments similar to the conditions used in this study.

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Section: Discussionsupporting

confidence: 92%

Section: Otolith Developmentsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

“…In this study, we observed that the lapilli and sagittae were present at hatching and the asterisci formed between 20 and 30 dph. These observations coincide with other studies on cyprinids reporting the formation of lapilli and sagittae well before hatching (Černý, ; Yan et al ., ), as well as the late appearance of asterisci (Vilizzi, ; Morioka & Matsumoto, ). In S. cephalus and probably in all cyprinids (Vilizzi, ; Neuman et al ., ; Schulz‐Mirbach & Reichenbacher, ), the lapillus appears as the most suitable otolith to study.…”

Section: Discussionmentioning

confidence: 99%