Сезонная изменчивость размерной структуры популяций Calanus sp. в водах Шпицбергена

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На основе материала, отобранного в двух фьордах о. Западный Шпицберген, проведено сравнение сезонной и пространственной изменчивости размерной структуры Calanus sp. Установлено наличие статистически достоверных отличий размерной структуры IV и V копеподитных стадий летнего и поздне-осеннего периода. Различия между популяциями Грен- и Билле-фьорда были выражены менее значительно и обусловлены локальной гетерогенностью факторов среды. В качестве причин, ответственных за проявление сезонной изменчивости, предложены и обсуждаются: селективное выедание крупных особей животными более высокого трофического уровня, индивидуальное изменение размеров тела особей по мере накопления/расходования жировых запасов, а также наличие в пелагиали двух генераций с различными размерными характеристиками.

Об авторах

И. В. Берченко

Мурманский морской биологический институт РАН

Автор, ответственный за переписку.
Email: berchenko.igor@gmail.com
Россия, Мурманск

Е. И. Дружкова

Мурманский морской биологический институт РАН

Автор, ответственный за переписку.
Email: druzhkova@mmbi.info
Россия, Мурманск

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© И.В. Берченко, Е.И. Дружкова, 2023