scholarly journals THE BIOLOGY OFASCIDIA NIGRA(SAVIGNY) IV. SEASONAL AND SPATIAL PATTERNS OF EMBRYONIC DEVELOPMENT AND HATCHING SUCCESS

1974 ◽  
Vol 146 (2) ◽  
pp. 206-216 ◽  
Author(s):  
IVAN GOODBODY ◽  
ELAINE FISHER
Keyword(s):  
Embryonic Development ◽  
Spatial Patterns ◽  
Hatching Success

The effects of cryogenically preserved sperm on the fertilization, embryonic development and hatching success of lumpfish C. lumpus

Aquaculture ◽  
2022 ◽  
Vol 547 ◽  
pp. 737466
Author(s):  
Albert Kjartan Dagbjartarson Imsland ◽  
Emily Purvis ◽  
Helena C. Reinardy ◽  
Lauri Kapari ◽  
Ellie Jane Watts ◽  
...  
Keyword(s):  
Embryonic Development ◽  
Hatching Success

Clutch quality is related to embryonic development duration, hatchling body size and telomere length in the spined toad (Bufo spinosus)

2021 ◽  
Vol 133 (1) ◽  
pp. 135-142
Author(s):  
Marion Cheron ◽  
Frédéric Angelier ◽  
Cécile Ribout ◽  
François Brischoux
Keyword(s):  
Reproductive Success ◽  
Embryonic Development ◽  
Parental Care ◽  
Telomere Length ◽  
Mate Selection ◽  
Hatching Success ◽  
Egg Quality ◽  
Parental Quality ◽  
Complex Interactions ◽  
Development Duration

Abstract Reproductive success is often related to parental quality, a parameter expressed through various traits, such as site selection, mate selection and energetic investment in the eggs or progeny. Owing to the complex interactions between environmental and parental characteristics occurring at various stages of the reproductive event, it is often complicated to tease apart the relative contributions of these different factors to reproductive success. Study systems where these complex interactions are simplified (e.g. absence of parental care) can help us to understand how metrics of parental quality (e.g. gamete and egg quality) influence reproductive success. Using such a study system in a common garden experiment, we investigated the relationships between clutch hatching success (a proxy of clutch quality) and offspring quality in an amphibian species lacking post-oviposition parental care. We found a relationship between clutch quality and embryonic development duration and hatchling phenotype. We found that hatchling telomere length was linked to hatching success. These results suggest that clutch quality is linked to early life traits in larval amphibians and that deciphering the influence of parental traits on the patterns we detected is a promising avenue of research.

Effects of Salinity and Temperature on Embryonic Development of the Pacific Cod (Gadus macrocephalus)

1966 ◽  
Vol 23 (3) ◽  
pp. 319-340 ◽  
Author(s):  
C.R. Forrester ◽  
D.F. Alderdice
Keyword(s):  
Survival Rate ◽  
Embryonic Development ◽  
Linear Relationship ◽  
Inverse Relationship ◽  
Hatching Success ◽  
Pacific Cod ◽  
Rate Of Development ◽  
Pacific Cod Gadus Macrocephalus ◽  
Gadus Macrocephalus ◽  
The Pacific

Eggs of the Pacific cod (Gadus macrocephalus Tilesius) were held from fertilization to completion of hatching in various combinations of constant salinity (19–31‰) and temperature (2–10 C). Hatching occurred in all salinities and temperatures, and survival was highest at the lower levels of both factors. A direct and approximately linear relationship was found between rate of development and temperature within the temperature range employed. At each temperature the length of the incubation period was increased at lower salinities. It is suspected that eggs were subjected to hypoxial conditions in the experiments, a circumstance considered to have depressed survival rate over all experimental combinations. There was, in general, an inverse relationship between salinity and temperature with respect to both size of larvae produced and the duration of the hatching period. Calculated response isopleths suggest that eggs of Gadus macrocephalus are euryhaline, and that maximum hatching success may be found in the vicinity of 19‰ S and 5 C. Changes of 1 C were calculated to be equivalent in effect on hatching success to a change of about 12‰ S.

Homeobox genes and the vertebrate head

Development ◽  
1988 ◽  
Vol 103 (Supplement) ◽  
pp. 17-24 ◽  
Author(s):  
Peter W. H. Holland
Keyword(s):  
Gene Expression ◽  
Embryonic Development ◽  
Neural Crest ◽  
Spatial Patterns ◽  
Homeobox Genes ◽  
Homeobox Gene ◽  
Developing Brain ◽  
Characteristic Sequence ◽  
Head Development ◽  
Experimental Analyses

Several Drosophila genes important in the control of embryonic development contain a characteristic sequence of DNA, known as the homeobox. Homeobox sequences are also present in a family of vertebrate genes, which may therefore have regulatory roles during vertebrate embryogenesis. In this article, data concerning the spatial patterns of vertebrate homeobox gene expression are discussed in relation to recent descriptive and experimental analyses of head development. It is concluded that the patterns of gene expression are consistent with homeobox genes having roles in anteroposterior positional specification within the developing brain and possibly the neural crest. The data are not clearly consistent with these genes having direct roles in controlling the patterns of cranial segmentation, although further studies may reveal whether vertebrate segments are units of developmental specification.

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