To better understand growth and age-pigment (lipofuscin) accumulation rates of the blue crab Callinectes sapidus under natural conditions, juveniles (33 to 94 mm carapace width) were reared in outdoor ponds for over 1 yr. Growth rates, measured by carapace width, during summer and fall exceeded all those reported in the literature; the initial carapace width of 59 ± 14 mm (mean ± SD) increased ...

Epizootic shell disease (ESD) is a degradative process of the carapace in the American lobster, (Homarus americanus), putatively caused by bacterial infection, and potentially responsible for serious economic losses to the lobster fishery. In Long Island Sound (LIS), ESD is prevalent in lobsters from eastern LIS (ELIS), but almost absent in western LIS (WLIS), presenting a unique opportunity to...

Parabetaeus acanthus sp. nov. is described based on two specimens from Thuwal, Saudi Arabia, and Madang, Papua New Guinea. The new species is unique within the genus in possessing an anteriorly directed, spine-like tooth on the mid-dorsal line of the carapace, posterior to base of the eyes, and in the stylocerite not reaching the mid-length of the first article of the antennular peduncle. The c...

A fossil tarantula (Araneae: Mygalomorphae: Theraphosidae) is described from an exuvium in Tertiary (Miocene) Chiapas amber, Simojovel region, Chiapas State, Mexico. It is difficult to assign it further taxonomically, but it is the first mygalomorph recorded from Chiapas amber and only the second unequivocal record of a fossil theraphosid. With a carapace length of ca. 0.9 cm and an estimated l...

121 COVER Skeletons of turtle, chicken, and mouse. The turtle body plan is unusual in that the ribs are transformed into a carapace, and the scapula, situated outside the ribs in other animals, is found inside the carapace. A report on page 193 explains the evolutionary origin of this inside-out skeletal morphology.

This research was conducted in February-March 2021. The study Nubatukan District, Lembata Regency. purpose of this to determine the type and size lobster caught by fishermen waters Lewoleba Bay, Regency, East Nusa Tenggara. methods used collecting data are survey interview methods. Based on results study, researchers found two types namely: Bamboo Lobster (Panulirus versicolor) Pearl ornatus). ...

Monthly sampling of speckled shrimp was conducted by bottom trawl in the Iskenderun Bay between November 2009 and October 2010. There was a linear relationship between carapace length and total length in males and females (TL = -0.112 + 0.2294*CL R2 = 0.8298, n = 327) for males, (TL = -0.3918 + 0.2731 * CL R2 = 0.8919, n = 457) for females, and (TL = -0.378 + 0.2684 * CL R2=0.8492, n=784) for t...

Monthly sampling of speckled shrimp was conducted by bottom trawl in the Iskenderun Bay between November 2009 and October 2010. There was a linear relationship between carapace length and total length in males and females (TL = -0.112 + 0.2294*CL R2 = 0.8298, n = 327) for males, (TL = -0.3918 + 0.2731 * CL R2 = 0.8919, n = 457) for females, and (TL = -0.378 + 0.2684 * CL R2=0.8492, n=784) for t...

Studies into the function of structures are crucial for making connections between morphology and behaviour of organisms, but are still rare for the terrestrial Testudinidae. We investigated the kinematics of shoulder girdle and forelimb motion in Hermann's tortoise Testudo hermanni using biplanar X-ray fluoroscopy with a twofold aim: firstly, to understand how the derived shapes of shoulder gi...

The crab Rhithropanopeus harrisii (Gould) (Brachyura; Xanthidae) was infected in the laboratory with the parasitic barnacle Loxothylacus panopaei (Gissler) (Cirripedia; Rhizocephala). Crabs and barnacles were collected in the Rhode River in the Chesapeake Bay, MD. Forty-three out of 153 R. harrisii, including stages from megalopa «1 mm of carapace width) to crab 8 stage (:±:8 mm of carapace wid...