Anormalidades durante el desarrollo embrionario de sardina común, Strangomera bentincki en el ambiente natural

  title={Anormalidades durante el desarrollo embrionario de sardina com{\'u}n, Strangomera bentincki en el ambiente natural},
  author={Paulina Saavedra V{\'a}squez and Alejandra Llanos-Rivera and Leonardo Rei Castro},
  journal={Revista De Biologia Marina Y Oceanografia},
To describe and quantify morphological abnormalities during the embryonic development of Strangomera bentincki an area nearby the Itata River mouth was sampled during the reproductive season 2007. Abnormality levels (3-13 %) were coincident with reported levels for other Clupeids species inhabiting areas with similar environmental characteristics to the area studied. Type and abnormalities prevalence were coincident with those reported for other fish species. Blastopore irregular closing and… 

Characterization of first blastomeres in Patagonian blenny (Eleginops maclovinus) (Perciformes: Eleginopidae)

The results showed that before fertilization oocytes presented a somehow turgid aspect and after fertilization and hydration, their diameter increased to 1001.5 ± 11 µm (but not statistically significant) and presented a spherical shape.

Study of the first blastomeres in Coho salmon (Oncorhynchus kisutch)

The morphometric results that were obtained in this investigation are compared with the results observed by other authors for teleostei and are discussed.

Morphometric of blastomeres in Salmo salar

Although the incidence of abnormal cleavage in S. salar is uncertain, there is a potential for some asymmetries to be corrected during embryogenesis to generate viable individuals and a quality assessment tool for gametes and/or embryos in salmonid species.

The impact of kraft pulping effluent on egg survival and hatching success in two species of Clupeiformes (Teleostei)

In conclusion, the obtained results indicate that anchoveta egg mortality and hatching failure increase only under 100% effluent exposure, coinciding with decreased egg quality near the end of spawning season and high effluent dilutions not significantly increase sardine and anchovetta egg mortalities.

UV radiation effects on the embryos of anchoveta (Engraulis ringens) and common sardine (Strangomera bentincki) off central Chile

Experimental results show that UVB may cause a decrease in hatching success, changes in buoyancy and embryonic malformations in epipelagic fish embryos, suggesting that lethal and sublethal effects may be occurring in the embryos of both species.

Cambios interanuales en la talla de madurez de sardina común, Strangomera bentincki, en la zona centro-sur de Chile (2007-2012)

It is concluded that GLMM technique was suited to representing interannual random changes in size-at-maturity of common sardine, which could be a consequence of factors associated with sampling, growth or delayed response in maturity due to spatio-temporal asynchrony in the reproductive process.



Epoca reproductiva y talla media de primera madurez sexual de Strangomera bentincki y Engraulis ringens en el período 1993-1997, en la zona centro-sur de Chile

It is postulated that the populational reproductive period for both species, occurring in August during winter time, is a consequence of the adaptation to the seasonal coastal upwelling ecosystem off central-southern Chile, the less-productive season.

Distribución espacial de la abundancia y de la talla de ocho tipos de larvasde peces entre la boca del guafo y bahía anna pink, zona austral de Chile

A comparison of the abundance and size of eight kinds of fish larvae was carried out, in seven geographic sectors located inside of the southern channels sys...


Defects of fish embryos and larvae due to the pollution of sea water. A review. Since 1988, several papers described various developmental defects occurring in the ichthyoplankton of polluted marine

Latitudinal and seasonal egg-size variation of the anchoveta (Engraulis ringens) off the Chilean coast

Changes in egg size throughout the anchoveta spawning season as well as for the peak months of the spawning season are reported and whether differences in larval length and yolksac volume occur in hatching larvae are evaluated.


An extensive literature exists on the problem of the influence exerted by several environmental factors upon the early stages of development in fishes. Other workers have dealt with this subject

Egg trait variation in anchoveta Engraulis ringens: a maternal response to changing environmental conditions in contrasting spawning habitats

These egg characteristics are determined by the adult female reproductive system, representing a maternal influence on the early life-history traits of anchoveta that might enable rapid changes in population densities in some years of improved habitat conditions.

Investigating the relationship among abnormal patterns of cell cleavage, egg mortality and early larval condition in Limanda ferruginea

Normal (symmetrically cleaving) and abnormal eggs were selected from four batches of eggs from three yellowtail flounder Limanda ferruginea, and reared as paired replicates under controlled conditions.

4 Sublethal Effects of Pollutants on Fish Eggs and Larvae