Otolith daily increment in sandfish.

Abstract

In order to establish the ageing technique of the sandfish Arctoscopus japonicus the deposition rate of otolith increments was determined through time marking by immersing larvae in 400mg/l tetracycline hydrocholride (TC) solution for 24h.

Validation of otolith daily increments for larval and juvenile Japanese halfbeak Hyporhamphus sajori

“…Eye pigmentation of H. sajori was observed before hatching and the number of growth increments was almost equal to the known age in days plus 2. This result agrees with Atlantic salmon (Geffen, 1983), Pacific saury (Watanabe and Kuji, 1991) and Japanese sandfish (Tsukamoto and Shima, 1990), which during the embryo stage of these species already form the daily increment that their eye pigment has observed before hatching. On the other hand, in bastard halibut (Tanaka et al, 1985), and Japanese anchovy (Tsuji and Aoyama, 1984) the daily increment is formed a few days after fertilization.…”

Onset of burying behavior concurrent with growth and morphological changes in hatchery-reared Japanese sandfish Arctoscopus japonicus

“…Accumulation of the basic data about the biology of the larvae and juveniles is important in order to develop these techniques. Some information on growth, otolith daily increment, morphological development and feeding of the larvae and juveniles have been reported 5–9 . This paper reports the fish size and morphological features of reared Japanese sandfish at the onset of burying themselves in the sand under experimental conditions.…”

“…Some information on growth, otolith daily increment, morphological development and feeding of the larvae and juveniles have been reported. [5][6][7][8][9] This paper reports the fish size and morphological features of reared Japanese sandfish at the onset of burying themselves in the sand under experimental conditions. Fertilized eggs were obtained from the Akita Prefectural Fisheries Promoting Center on 15 December 1998.…”

Otolith microstructure of Arabesque greenling Pleurogrammus azonus: A species with a long embryonic period

“…Species with long embryonic periods have been reported to start forming increments in the otoliths before hatching (Geffen, 1983;Tsukamoto and Shima, 1990;Narimatsu and Munehara, 1997;Morales-Nin, 2000;Joh et al, 2008;Nakaya et al, 2008). Most of these workers reported that the prominent increment (check) was associated with eye-pigmentation, but has been shown to form at the time of hatching in fat greenling Hexagrammos otakii (Joh et al, 2008), which is a closely-related species of Arabesque greenling P. azonus.…”

“…In general, fish with long embryonic periods start forming increments in the otoliths before hatching (Geffen, 1983;Tsukamoto and Shima, 1990;Narimatsu and Munehara, 1997;Morales-Nin, 2000;Joh et al, 2008;Nakaya et al, 2008). However there is no detailed information on the relationship between morphological development during the embryonic period and the formation of the otolith microstructure.…”