Effects of hatching enzymes on egg envelope digestion in the male‐brooding seahorse

2021 ◽  
Author(s):  
Huixian Zhang ◽  
Bo Zhang ◽  
Mari Kawaguchi ◽  
Qiang Lin
Keyword(s):  
Egg Envelope

Formation of the egg envelope of a teleost, Dicentrarchus labrax (L.): immunochemical and cytochemical detection of multiple components

2004 ◽  
Vol 208 (1) ◽  
pp. 43-53 ◽  
Author(s):  
A. M. Fausto ◽  
S. Picchietti ◽  
A. R. Taddei ◽  
C. Zeni ◽  
G. Scapigliati ◽  
...  
Keyword(s):  
Dicentrarchus Labrax ◽  
Egg Envelope ◽  
Multiple Components

A glycoprotein from the liver constitutes the inner layer of the egg envelope (zona pellucida interna) of the fish, Oryzias latipes

1989 ◽  
Vol 133 (1) ◽  
pp. 101-110 ◽  
Author(s):  
Tatsuo S. Hamazaki ◽  
Yoshitaka Nagahama ◽  
Ichiro Iuchi ◽  
Kenjiro Yamagami
Keyword(s):  
Zona Pellucida ◽  
Oryzias Latipes ◽  
Egg Envelope

Molecular and Cellular Basis of Formation, Hardening, and Breakdown of the Egg Envelope in Fish

1992 ◽  
pp. 51-92 ◽  
Author(s):  
K. Yamagami ◽  
T.S. Hamazaki ◽  
S. Yasumasut ◽  
K. Masuda ◽  
I. luchi
Keyword(s):  
Egg Envelope ◽  
Cellular Basis

The Influence of Photoperiodicity on Hatching of Sepia Officinalis

1991 ◽  
Vol 71 (3) ◽  
pp. 665-678 ◽  
Author(s):  
W. P. Paulij ◽  
P. M. J. Herman ◽  
M. E. F. Roozen ◽  
J. M. Denuce
Keyword(s):  
Embryonic Development ◽  
Dark Period ◽  
Light Period ◽  
Embryonic Stage ◽  
Natural Light ◽  
Sepia Officinalis ◽  
Egg Envelope ◽  
Perivitelline Fluid ◽  
Dark Pulse ◽  
Egg Capsule

The influence of photoperiodicity on hatching of Sepia officinalis was investigated under different experimental light-dark (LD) conditions. The results are viewed in relation to some relevant properties of the perivitelline fluid (PVF) and the egg capsule during embryonic development. In embryos of S. officinalis the transition from light to dark ap-pears to act as a 'Zeitgeber' or synchronizer. The embryos consistently hatched during periods of darkness, even when the duration of the dark period was short (1–4 h) and replaced part of the natural light period. The hatching rhythm was independent of the embryonic stage at which the experimentwas started. Embryos that developed under a given LD rhythm did not hatch at that rhythm if it was changed or eliminated. In the absence of an external LD rhythm the time to hatching increased. Lack of pigmentation in the egg envelope appeared to reduce the time to hatching. If embryos were exposed to a single dark period of 1–4 h significantly more hatched during darkness while a dark-pulse of ten minutes resulted in no hatching. At the end of embryonic development the egg capsule of S. officinalis becomes thinner due to the expanding PVF. Absence ofthe envelope did not affect embryonic development but dramatically increased mortality and prema hire hatching (96%). Spectrophotometrical investigations indicated that light between 200 and 900 nm is absorbed similarly by the envelope and by female ink. The function of pigmentation in the envelopes remains obscure.

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