Reproductive biology of Oreochromis niloticus (Perciformes: Cichlidae) at Emiliano Zapata dam, Morelos, Mexico

 

Đã lưu trong:
Chi tiết về thư mục
Nhiều tác giả: Peña-Mendoza, B, Gómez-Márquez, J L., Salgado-Ugarte, I H, Ramírez-Noguera, D
Định dạng: artículo original
Trạng thái:Versión publicada
Ngày xuất bản:2005
Miêu tả:The reproductive season of tilapia was studied by monthly samplings at Emiliano Zapata dam, Morelos State, Mexico. From February 1999 through February 2000 a sample of 50 fish was taken from the commercial catch (castnet, 6.5 cm of mesh size). The observed sex ratio was 1:1.29 (females:males) (χ²=10.26; p<0.05). The tilapia reached maturity at 151.3 mm (females) and 152.0 mm (males) of total length. Rainy (August) and dry (February) seasons were determined as the breeding period. Fecundity variation was better correlated with length (r=0.7473; p<0.002) than with weight (r=0.7395; p<0.002). The fecundity ranged between 243 and 847 oocytes per fish, with egg diameter from 300 to 3 700 μm. Intensive breeding activity in August and February coincide with phytoplankton biomass increase.
Quốc gia:Portal de Revistas UCR
Tổ chức giáo dục:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
Ngôn ngữ:Inglés
OAI Identifier:oai:portal.ucr.ac.cr:article/14666
Truy cập trực tuyến:https://revistas.ucr.ac.cr/index.php/rbt/article/view/14666
Từ khóa:reproduction
oreochromis niloticus
gonadosomatic index
hepatosomatic index
fecundity
reproducción
índice gonadosomático
índice hepatosomático
fecundidad