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On this European lobster, the right claw (on the left side of the image) is the crusher and the left claw is the cutter.. Homarus gammarus is a large crustacean, with a body length up to 60 centimetres (24 in) and weighing up to 5–6 kilograms (11–13 lb), although the lobsters caught in lobster pots are usually 23–38 cm (9–15 in) long and weigh 0.7–2.2 kg (1.5–4.9 lb). [3]
Life Cycle of a Lobster. Female Cornish Lobsters with eggs attached are protected from harvest, but although a female lobster can carry as many as twenty thousand eggs under her carapace, only one ...
European lobster or common lobster: may grow to a length of 60 cm (24 in) and a mass of 6 kilograms (13 lb), and bears a conspicuous pair of claws. [8] In life, the lobsters are most of the time blue, only becoming "lobster red" on cooking. [9] Homarus gammarus is a highly esteemed food, and is widely caught using lobster pots, [8]
It is also known as Atlantic lobster, Canadian lobster, true lobster, northern lobster, Canadian Reds, [3] or Maine lobster. [ 4 ] [ 5 ] It can reach a body length of 64 cm (25 in), and a mass of over 20 kilograms (44 lb), making it not only the heaviest crustacean in the world, but also the heaviest of all living arthropod species.
Fecundity or number of eggs increases with smaller sized eggs and increasing body size of the parent. This results in increasing incubation time and consequently, increased egg volume. [ 5 ] The trend of larger numbers of eggs and smaller sized eggs is mostly found in lower latitudes and cooler temperatures in order to accommodate for the ...
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At its most complete, a crustacean's life cycle begins with an egg, which is usually fertilised, but may instead be produced by parthenogenesis. This egg hatches into a pre-larva or pre-zoea. Through a series of moults, the young animal then passes through various zoea stages, followed by a megalopa or post-larva.
The adult female consists of three parts, the cephalothorax, a thorax bearing two large lateral expansions or wings, and the abdomen which is responsible for carrying two oval egg-sacs. The female Nicothoe astaci abdomen tip measures 1.2–1.3 millimetres (0.047–0.051 in), and each wing measures 4 mm (0.16 in) long.