Thermal resistance increases for hermit crabs depending on their natural habitat, for example, if an animal is more accustomed to extreme differences in tides, then it will be more tollerant of thermal changes. Pagurus samuelis domonstrated no variance in thermal tollerance based on size.
As the hermit crab grows it begins to look for replacement shells, the selection of its new shell is crucial to its survival and reproduction. If it cannot locate a new shell in a timely manner, the hermit crab risks a decrease in protection from preditors and dessication.
Hermit crab populations are limited by the amount of gastropod shells available in their immediate habitat.
In a study done to test whether these hermit crabs preffered their original shell or a different abandoned shell, scientists found that P. samuelis have the ability to locate their shell based in chemical cues. In this expiriment scientiss boiled the irginal shells and the hermit crab showed no prefference for any shell; but when placed in water with the original, unboiled, shell and the different, unboiled, shell, the hermit crab went for its original shell. The scientists thus concluded that these hermit crabs are able to sense which shell is theirs.
Pagurus samuelis, the blueband hermit crab, is a species of hermit crab from the west coast of North America, and the most common hermit crab in California. It is a small species, with distinctive blue bands on its legs. It prefers to live in the shell of the black turban snail, and is a nocturnal scavenger of algae and carrion.
Pagurus samuelis is a small hermit crab, at up to a total length of 40 mm (1.6 in) and a carapace width of up to 19 mm (0.75 in).[2] The base colour of the exoskeleton is brown or green,[2] but the antennae are red, and adults have bright blue bands near the tips of their legs.[3] In smaller individuals, the bands may be white.[2] The legs and carapace are covered in setae, and the rostrum at the front of the carapace is triangular.[2]
Pagurus samuelis is found from Alaska to Punta Eugenia in Baja California, Mexico. It was formerly thought to also occur in Japan, but the Japanese specimens which were formerly assigned to this species are now recognised as Pagurus filholi.[4][5]
Pagurus samuelis prefers to use the discarded shell of the black turban snail, Tegula funebralis.[2] They are chiefly nocturnal scavengers that feed on algae, especially the giant kelp Macrocystis pyrifera, and detritus.[2] In a laboratory setting, P. samuelis can survive on a diet of Pelvetia canaliculata.[2] Predators of P. samuelis include fishes such as the pile perch (Rhacochilus vacca), California sheephead (Semicossyphus pulcher) and the spotted kelpfish, Gibbonsia elegans.[2]
In the breeding season, males carry females on their backs, sometimes for more than a day.[3] Eggs are produced from May to July, and are carried on the female's abdomen, inside the shell.[3]
Pagurus samuelis, the blueband hermit crab, is a species of hermit crab from the west coast of North America, and the most common hermit crab in California. It is a small species, with distinctive blue bands on its legs. It prefers to live in the shell of the black turban snail, and is a nocturnal scavenger of algae and carrion.
Pagurus samuelis est une espèce de bernard-l'ermite vivant sur la côte ouest de l'Amérique du Nord, et la plus abondant des bernards-l'ermite, en Californie. C'est une espèce de petite taille, avec des bandes bleues bien visibles sur les pattes. On le trouve le plus souvent dans la coquille de l'escargot Tegula funebralis et est un charognard nocturne.
Pagurus samuelis est un petit bernard-l'ermite, pouvant atteindre une longueur totale de 40 mm et une largeur de carapace d'au maximum 19 mm[2]. L'exosquelette a une couleur de base brun ou vert[2] mais les antennes sont rouges et les adultes ont des bandes d'un bleu brillant près de l'extrémité des pattes[3]. Chez les jeunes individus, les bandes peuvent être de couleur blanche[2]. Les pattes et la carapace sont couvertes de soies et le rostre, à l'avant de la carapace, est triangulaire[2].
On le trouve depuis l'Alaska jusqu'à Punta Eugenia en Basse-Californie, au Mexique. On pensait autrefois qu'il vivait également au Japon, mais les spécimens japonais qui étaient auparavant affectés à cette espèce sont maintenant classés comme Pagurus filholi[4],[5]. P. samuelis est le bernard-l'ermite le plus retrouvé dans les grandes mares résiduelles en Californie, où il est dix fois plus abondant que P. granosimanus[3].
Il préfère utiliser la coquille de l'escargot Tegula funebralis[2]. Il est principalement charognard nocturne, se nourrissent d'algues, en particulier du varech géant Macrocystis pyrifera et de charognes[2]. Au laboratoire, P. samuelis peut en lui fournissant une algue Pelvetia canaliculata[2]. Ses prédateurs comprennent des poissons comme Rhacochilus vacca, le Labre californien (Semicossyphus pulcher) et Gibbonsia elegans[2].
Pendant la période de reproduction, les mâles portent des femelles sur leur dos, parfois pendant plus d'une journée[3]. Les œufs sont pondus de mai à juillet, et sont transportés sur l'abdomen de la femelle, à l'intérieur de la coquille[3].
Pagurus samuelis est une espèce de bernard-l'ermite vivant sur la côte ouest de l'Amérique du Nord, et la plus abondant des bernards-l'ermite, en Californie. C'est une espèce de petite taille, avec des bandes bleues bien visibles sur les pattes. On le trouve le plus souvent dans la coquille de l'escargot Tegula funebralis et est un charognard nocturne.
Pagurus samuelis is een tienpotigensoort uit de familie van de Paguridae.[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1857 door Stimpson.
Bronnen, noten en/of referentiesPagurus samuelis, Cua ẩn sĩ sọc xanh, là một loài cua ẩn sĩ từ bờ biển phía tây của Bắc Mỹ, và là loài cua ẩn sĩ phổ biến nhất ở California. Nó là một loài nhỏ, với những sọc màu xanh đặc biệt trên đôi chân của chúng. Nó thích sống trong vỏ của ốc khăn xếp đen, và là một sống về đêm ăn tảo và xác thối rữa.
Pagurus samuelis, Cua ẩn sĩ sọc xanh, là một loài cua ẩn sĩ từ bờ biển phía tây của Bắc Mỹ, và là loài cua ẩn sĩ phổ biến nhất ở California. Nó là một loài nhỏ, với những sọc màu xanh đặc biệt trên đôi chân của chúng. Nó thích sống trong vỏ của ốc khăn xếp đen, và là một sống về đêm ăn tảo và xác thối rữa.