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Austin B. Williams, L. G. Eldredge
Article type: Article
1994 Volume 23 Pages
1-4
Published: October 26, 1994
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Deepwater baited traps set around the U. S. Territory of Guam have yielded a species of spider crab with novel characteristics. Rochinia decipiata, new species, family Majidae, sub family Inachinae, represented by a unique male, most closely resembles R. moluccensis and R. suluensis from the Indonesian region with respect to shape of rostral horns, orbital and branchial regions of the carapace, chelipeds and first pleopods. Description, measurements, illustrations and comparative discussion are presented, and the key to Indo-Pacific species of Rochinia by Griffin & Tranter (1986) is emended.
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Tatsuo Hamano, Masaru Torisawa, Masaki Mitsuhashi, Ken-Ichi Hayashi
Article type: Article
1994 Volume 23 Pages
5-11
Published: October 26, 1994
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Three resin casts of the burrow of a stomatopod crustacean, Oratosquilla oratorio, were obtained by diving in the southern part of Ishikari Bay. The casts showed the following common structural features: a U-shaped tunnel with two openings; the burrow crosssection was semi-circular and the floor was flat and smooth; and a constriction was present on the central part of the burrow. The density of individual O. oratoria in the bay, each occupying a burrow, was estimated at 0.285 inds./m^2, from the number of burrow openings on the bottom.
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Peter K. L. Ng, Daniele Guinot, Thomas M. Iliffe
Article type: Article
1994 Volume 23 Pages
12-22
Published: October 26, 1994
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A new species of sesarmine crab, Sesarmoides ultrapes (Brachyura: Grapsidae) is described from anchialine caves in the Florida and Malaita Islands, Solomon Islands. This species has probably the longest ambulatory legs of any grapsid and one of the longest in any known Brachyuran. The new species is allied to S. cerberus (Holthuis, 1964) and 8. novabritannia Ng, 1988, but differs distinctly in the shape of the carapace, structure of the basal antennal segment, proportionately much longer ambulatory legs, in the form of the anterior sternites of the sternal plastron, by the broader male abdomen and by the male first pleopod.
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Tomoyuki Komai
Article type: Article
1994 Volume 23 Pages
23-31
Published: October 26, 1994
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A new intertidal species of hermit crab of the genus Pagurus, P. spina is described and illustrated on the basis of one male and two female specimens from Miyako, on the Pacific coast of northeastern Honshu, Japan. The new species apparently resembles P. lanuginosus De Haan, 1849, also from Japan, but shows differences in the morphology of the chelipeds, armature of the anterior lobe of sternite of the third pereopods, and coloration.
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Yasuo Fukui
Article type: Article
1994 Volume 23 Pages
32-39
Published: October 26, 1994
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The mating behavior of the grapsid crab Gaetice depressus was investigated with reference to the relative body size of males and females of the mating pairs. In laboratory tanks, sexually active males and receptive females were held together and their behaviors recorded with a video camera. When males were larger than females in the pairs, mating usually began with female approach to the male, and they continued to make contact with each other after copulation. In contrast, when males were smaller than females, mating usually began with male approach to the female, and they parted shortly after copulation. The straddling of females by males before copulation and the female-over-male copulatory position were observed regardless of the relative body size of the pairs. The difference in the female's behavior between the matings with larger and smaller males suggests that females prefer males larger than themselves.
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Keiji Baba
Article type: Article
1994 Volume 23 Pages
40-45
Published: October 26, 1994
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Lauriea siagiani new species from Bali, Indonesia is the second species of the genus. It is differentiated from Lauriea gardineri (Laurie, 1926) by lack of spines on both the distomesial margin of the antennular basal segment and the mesial margin of the second segment of the antennal peduncle, more slender distal segments of the antennule, more elongate eyestalks, less prominent anterior margin of the third thoracic sternite, and by different coloration.
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Yukio Hanamura, David R. Evans
Article type: Article
1994 Volume 23 Pages
46-60
Published: October 26, 1994
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This paper reports on 19 species of caridean shrimps of the families Oplophoridae and Pasiphaeidae (Crustacea: Decapoda) collected by deepwater trawls off Western Australia. Among them, four species (Acanthephyra eximia, Eupasiphaea latirostris, Glyphus marsupialis and Pasiphaea tarda) are new to the Australian fauna. Occurrence of the bathypelagic lophogastridan mysid Gnathophusia ingens, new to the Western Australian fauna, is reported in an appendix to this paper.
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Hiroshi Motoh, Raul Guartatanga, Enrique Blacio
Article type: Article
1994 Volume 23 Pages
61-68
Published: October 26, 1994
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Along the Ecuadorian coast, shrimp fry collecting gear have been used for more than ten years. These consist of six types of gear, three stationary and three mobile. The construction and dimensions of these gear are explained and illustrated as well as their mode of operation. Some ecological notes on shrimp fry are given. These gear could prove to be useful for collection of fish fry for culture. Finally some recommendations on how to improve fry handling for their better survival and to conserve natural resources of edible species are suggested.
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Osamu Murayama, Isamu Nakatani, Michiru Nishita
Article type: Article
1994 Volume 23 Pages
69-73
Published: October 26, 1994
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Lateral outgrowths were induced by damage to the propodi of the crayfish, Procambarus clarkii. On some of the damaged propodi, a slightly projecting structure was formed at the site of the wound at the first molt after wounding. Such structures became larger at the next molt. Some of them were single and others were bifurcated structures. These structures formed a hook at each of the points on the branched structure, similar to that at the tip of a normal propodus.
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Takao Yamaguchi
Article type: Article
1994 Volume 23 Pages
74-78
Published: October 26, 1994
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A total of 12,129 specimens of Macromedaeus distinguendus were examined for handedness. The percentage of left-handed crabs was 21.5 % in males and 20.8 % in females. No significant increase in the ratio of left-handed crabs by size was confirmed. Examination of a total of 4,453 specimens of Leptodius exaratus showed that the species has an equal ratio with regard to handedness.
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Keiko Kuribayashi, Shin-ichi Ishimaru, Shunsuke F. Mawatari
Article type: Article
1994 Volume 23 Pages
79-88
Published: October 26, 1994
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The mature male and female of Sternomoera yezoensis (Ueno, 1933) from Hokkaido, northern Japan, are described for the first time. The outer rami of pleopods 1-2, especially that of pleopod 2, in the male differ in structure from those of the female. This species is differentiated from other Sternomoera spp. in possessing a shallow inferior antennal sinus and in having 2 rather than 5-10 notches on epimeron 3.
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Takao Yamaguchi, Shoji Tokunaga, Hisamichi Aratake
Article type: Article
1994 Volume 23 Pages
89-101
Published: October 26, 1994
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The prevalence of Sacculina sp. in Hemigrapsus sanguineus was examined on specimens collected at 13 sites in the Amakusa Islands and surrounding areas. The highest and lowest prevalences were 84.1 and 1.1 % in males and 83.6 and 1.0 % in females respectively. The statistical analysis of the frequency of parasites per host specimen indicates that the settlement of the parasite in the host is contagious.
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Hajime Watabe, Hitoshi Ikeda
Article type: Article
1994 Volume 23 Pages
102-107
Published: October 26, 1994
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A new nephropid lobster, Nephropsis hamadai, is described from a bathyal depth in Sagami Nada, central Japan. The new species is readily distinguished from N. stewarti Wood-Mason, 1873 by the combination of stout and less pubescent body, and spinose dorsal rostral carinae. It is also distinguished from the closest species, N. serrata Macpherson, 1993, from northern Australia by the shapes of coxal processes of both the second and third pereopods.
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Tianxiang Gao, Shinji Tsuchida, Seiichi Watanabe
Article type: Article
1994 Volume 23 Pages
108-116
Published: October 26, 1994
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The growth and reproduction of Rhynchoplax coralicola were investigated from March 1993 to April 1994 at the Banda Marine Laboratory of Tokyo University of Fisheries, Chiba Prefecture, Japan. Ovigerous females were found from June to September with a peak in July-August. After the puberty molt, secondary sexual characteristics appear in the abdomen of females and in the chelae of males. The clutch size of ovigerous females ranged from 23 to 220 eggs with a significant increase in diameter of eyed eggs over non-eyed eggs. Juveniles recruit from September, growing slowly over winter and spring but from March to June they grow rapidly, maturing during May to July. After the reproductive period few adults were observed. It is suggest that the maximum life span of R. coralicola must be about one year in this study area.
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Article type: Bibliography
1994 Volume 23 Pages
117-120
Published: October 26, 1994
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Article type: Appendix
1994 Volume 23 Pages
121-
Published: October 26, 1994
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