Blue land crabs (Jueyes) Jul 15 to Oct 15 there is what is known as the closed season - Puerto Rico
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- Опубліковано 11 вер 2024
- Cardisoma guanhumi, also known as the blue land crab or great land crab, is a species of land crab found in tropical and subtropical estuaries and other maritime areas of land along the Atlantic coast of the Americas from Brazil and Colombia, through the Caribbean and Gulf of Mexico, to the Bahamas, and north to Ponce Inlet, Florida[3] Princess Place Preserve on the Palm Coast, and Bermuda.[4] The species varies in colour from dark blue to brown or pale grey, and may grow to 15 centimetres (6 in) in carapace width and weigh over 500 grams (18 oz).
The carapace of Cardisoma guanhumi can reach a width up to 15 centimetres (6 inches). As with many crab species, males possess dimorphic claws; the larger claw can become longer than the carapace's width. The eyes are stalked and their colour ranges from a deep blue to a pale grey. Juveniles generally have a brown carapace with orange coloured legs. Females usually appear light gray or white. Adult colours are usually present between 80 grams (2.8 ounces) and 180 g (6.3 oz). Individuals of the species can weigh over 500 g (18 oz).
To protect the populations of the common crab (Cardisoma guanhumi), from July 15 to October 15 there is what is known as the closed season ...(This video was recorded in June) The reproductive cycle is closely linked to seasonal weather patterns and the lunar phase. Heavy rains in the spring initiate migrations. When this occurs, C. guanhumi begins to gain weight as more food is consumed and gathered for the first few weeks of the migratory period. Males mate with mature females during this time. Fertilization is internal, and throughout July and August, most females carry the eggs externally. After approximately 2 weeks, the eggs will hatch and must be released into saltwater for the larvae to survive. Several spawns per year may occur, with the spawning season varying depending on the location within the range. In Florida, spawning season lasts from June to December and reaches its peak in October and November. In the Bahamas, the season extends from July to September, while in Venezuela, spawning lasts from July to November. Eggs hatch into free-swimming larvae with 5 zoeal stages and 1 postlarval or megalopa stage. The typical development time from hatching to the first crab stage is 42 days under laboratory conditions; however, this time may be much shorter in wild specimens.
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