Abnormalities during the embryonic development in araucanian herring, Strangomera bentincki, in natural environment

作者：Vasquez Paulina^*; Llanos Rivera Alejandra; Castro Leonardo

来源：Revista de Biologia Marina y Oceanografia, 2010, 45(1): 177-185.

• Frequency of abnormalities
• malformations
• fish eggs

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 the embryonic axis twist were the most frequent in the samples. These abnormality types would be caused by errors during the epiboly, which can occur spontaneously, influenced by internal or external factors.

• 出版日期2010