Seasonal Changes in the Population Structure and Life Cycle of Neomysis integer in Pärnu Bay, Northeastern Baltic Sea

Neomysis integer'i populatsioonistruktuuri ja elutsükli sesoonsed muutused Pärnu lahes Liivi lahe kirdeosas

Ilmar Kotta；Jonne Kotta；Kristjan Herkül

Baltic Sea ； nectobenthos ； NAO index ； Neomysis integer ； reproduction

Proceedings of the Estonian Academy of Sciences. Biology. Ecology

56卷4期（2007 / 12 / 20）

312 - 325

英文

In winter and spring the density of overwintering generations of Neomysis integer was low. In spring the increase in the biomass of the generations was due to the growth in length and not due to reproduction. The mysid bred continuously through the summer and had two recruitment peaks. The mortality of the species abruptly increased from September. The timing of reproduction depended on the harshness of winter (NAO winter index) and spring temperature. Reproduction took place earlier in milder winter and spring conditions. Large-scale climate patterns such as the NAO index were a better predictor of the life cycle of N. integer in Pärnu Bay than local environmental variables.