Зоологический журнал

Anatomy of gonads and regime of spawning of ctenophore Mnemiopsis sp. in the Black sea

Zaika V.E., Revkov N.K.

In an invading ctenophoran species of from the Black Sea (Mnemiopsis sp.) the gonads lie not only in the walls of 8 meridional canals but in the walls of auricular canals under the flagellar rows as well. Up to 2—3 thousands to eggs can be simultaneously produced by a large ctenophore. Under the natural light regime and temperature of 19 to 24° C the signs of the formation of testicles appears at 18h, eggs at early stage of oogenesis — after 20h, the spawning take place from 23h to 01 a. m. With augmentation of temperature from 19—21 to 24—28° C the duration of embryogenesis decreases from 19.5—21 to l l h . A mass spawning of Mnemiopsis sp. in the Black Sea begins when the surface temperature of water reaches 23° C.

ПОПУЛЯЦИОННАЯ СТРУКТУРА И ОСОБЕННОСТИ ЭВОЛЮЦИИ В РОДЕ OSTRINIA

ФРОЛОВ А.Н.

ДИНАМИКА ЛЕТА БАБОЧЕК И ОСОБЕННОСТИ РАССЕЛЕНИЯ ВРЕДНЫХ ЧЕШУЕКРЫЛЫХ В ЧЕРНОМОРСКОЙ ЗОНЕ СЕВЕРНОГО КАВКАЗА

ГРИЧАНОВ ИГОРЬ ЯКОВЛЕВИЧ, БУКЗЕЕВА ОЛЬГА НИКОЛАЕВНА, ЗАКОННИКОВА К.В.

ГЕОГРАФИЧЕСКАЯ ИЗМЕНЧИВОСТЬ ПОПУЛЯЦИОННОЙ СТРУКТУРЫ СТЕБЛЕВЫХ МОТЫЛЬКОВ (OSTRINIA SPP.) НА ДВУДОЛЬНЫХ РАСТЕНИЯХ-ХОЗЯЕВАХ И ФАКТОРЫ, ЕЕ ОПРЕДЕЛЯЮЩИЕ

ФРОЛОВ А.Н.