Христофорова Н.К. Основы экологии: Учебник для биол. и экол. факультетов университетов (рус.
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Это позволяет вытягивать челюсти, раздвигать их в стороны, опускать жаберный аппарат и дно ротовой полости.
Вторичные половые признаки могут проявляться в виде различий в размерах тела, частей тела (например, удлинённые плавники), строения тела (например, выросты на голове), расположении зубов, окраске, а также встречаются в виде отличий между акустическими, химическими, электрическими и другими характеристиками самцов и самок. Двуполое размножение может быть моногамным, полигамным и промискуитетом.
A fish’s dorsal fin is situated on its back again. Some fish have two or maybe more dorsal fins, positioned inside of a line working alongside the middle of the again.
The structural and, especially, the physiological adaptations for all times at these kinds of extremes are rather badly regarded and provide the scientifically curious with great incentive for research.
Механорецепторы рыб содержатся во внутреннем ухе (парные органы слуха и равновесия), а также органах боковой линии. Внутреннее ухо пластиножаберных (акул и скатов) и костистых рыб состоит из трёх полукружных каналов, расположенных в трёх взаимно перпендикулярных плоскостях, и трёх камер, каждая из которых содержит отолиты.
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يشير الرقم الأول أيضًا إلى الرقم الأخير من سنة الإنتاج.
The majority of fish are oviparous, this means the women lay eggs that build and hatch outside of your body. The eggs of fish usually are fertilized externally through the sperm with the males. Typically, many 1000s of eggs are manufactured, with only a very small portion ever reaching adulthood.
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Sportfishing is another way of taking pleasure in the purely natural natural environment, also indulged in by an incredible number of men and women yearly. Fascination in aquarium fishes and sportfishing supports multimillion-greenback industries all through the world.
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