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This egg case can be easily identified from all others in that it is the only one to have a steep ridge; giving the case a convex shape. [1] The keel on the egg case is considered very broad; representing 30–33% of the width of the egg case. [1] Big skates are one of only two skates known to have multiple embryos inside an egg case; up to 7 ...
This species is oviparous, and is one of the few skate species that typically has more than one embryo within each egg capsule, commonly called "mermaid's purses" when they are found washed up on beaches. The egg capsule of a big skate is the largest of any skate, measuring 23–31 cm (9–12 in) long and 11–19 cm (4–7 in) wide.
A skate laying an egg case (mermaid's purse) at the San Sebastian Aquarium Four developing embryos located in an opened big skate egg case (mermaid's purse) Skates mate at the same nursery ground each year. In order to fertilize the egg, males use claspers, a structure attached to the pelvic fins.
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Clearnose skates are oviparous, and therefore they lay fertilized eggs, commonly referred to as Mermaid's purses. Each corner of the rectangular egg case has a small curved horn. [16] The size of the egg case ranges from 6.4 to 7.7 cm (2.5 to 3.0 in) long and 3.7 to 4.7 cm (1.5 to 1.9 in) wide. [16]
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Winter skates are oviparous, meaning that this species is egg-laying. Their reproductive strategy involves slow growth and late maturity. They lay one egg in a purse or capsule. On average, L. ocellata lays 50 eggs a year, while Little Skate lays 30 eggs. This implies the Winter Skate species has a higher fecundity than the Little Skate.
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