The carcinofauna found in stomach contents of the flying gurnard (Dactylopterus volitans) on the continental shelf of the Campos Basin,Brazil

A total of 3109 crustaceans belonging to 50 taxa distributed in 42 families were found in 117 analysed stomachs of flying gurnard (Dactylopterus volitans). Samples were obtained in April 2008 by the R/V Gyre using a bottom trawl towed in 12 stations at 14–100 m depth on the continental shelf of the Campos Basin, Brazil. The carcinofauna was analysed and the order Calanoida (Copepoda) found to be the most important item in terms of relative abundance and frequency of occurrence, followed by the order Amphipoda (Peracarida), the infraorder Brachyura (Decapoda), the order Stomatopoda and the subclass Myodocopa (Ostracoda). In the order Calanoida, the species Pontellopsis cf. villosa (Pontellidae) represented 98.04% of total crustacean abundance. The diet of Dactylopterus volitans varied according to fish size, with higher diversity of Crustacea at smaller size classes, decreasing in larger fishes. A similar pattern regarding depth was obtained, with greater diversity of taxa in gurnard stomachs caught at shallower depths. Flying gurnard is considered a generalized carnivore of invertebrates, eating mobile macrobenthic organisms, such as crustaceans, and its diet varies with its life stage, without any specific group as its main food source.     

Dissociated cell suspensions ofCarcinus maenas Y-organs as a tool to study ecdysteroid production and its regulation

In vitro ecdysteroid production by dissociated Y-organ cells of the shore crabCarcinus maenas was characterized during short-term incubations. Under optimized conditions (M199 adjusted to crab osmolality and with the addition of 10% foetal calf serum), ecdysteroid production by dispersed cells increased linearly during 4-hour incubations, with little intra-assay variation. 25-deoxyecdysone was mainly produced. PurifiedCarcinus molt inhbiting hormone (CamMIH) produced a dose-dependent inhibition of ecdysteroid production by dispersed cells. The cells were about 50 times more sensitive than whole glands to MIH. Other structurally-related peptides were tested.     

Heterochromatin characterization and distribution in the chromosomes of two populations ofIdotea baltica basteri Audouin, 1826 (Isopoda,Valvifera)

Two mediterranean populations ofIdotea baltica basteri from Messina and Naples showed a set of chromosomes composed by 58 all-biarmed chromosomes. The heterochromatin was located in the pericentromeric region of the chromosomes, and its composition appeared heterogeneous. In fact, not all the homologs showed heterochromatin resistant to digestion with three restriction enzymes (Alu I, Hae III and Sau 3A). Moreover, the two populations showed polymorphism in a band of G+C-rich telomeric heterochromatin, which was present only in the population from Messina. It is hypothesized that chromosomal polymorphism might reflect the geographical isolation of the two populations. It is also suggested that a process of diversification is taking place.     

三疣梭子蟹雌性生殖系统的组织学研究

从组织学和组织化学两个方面研究了三疣梭子蟹的雌性生殖系统。卵巢壁薄，由外膜和内生殖上皮构成。外膜主要由结缔组织和薄层肌肉构成，它有许多延伸物伸入卵巢中把卵巢分成一个个小区。内生殖上皮不断增产生生殖带，其中含有卵原细胞等各阶段雌性生殖细胞和滤泡细胞。卵原细胞较小，核圆形，核仁不明显。初级卵母细胞核开始增大，由于核质增多而逐渐呈空泡状，核仁圆形。卵母细胞胞质内的卵黄逐渐积累增多而发育为成熟卵母细胞。卵     

河南淡水等足类甲壳动物1新记录一中华急游水虱Tachaea chinensis

记述河南新乡地区淡水虾体外寄生等足类1新记录:中华急游水虱Tachaea chinensis Thielemann,1910.标本采自新乡黄河湿地鸟类国家级自然保护区和新乡市区的农贸市场.     

我国东海小笠藤壶一种新记录(甲壳纲、围胸目)

本文描述了我国东海小笠藤壶属的一种新记录。多肋小笠藤壶[Tetraclitella multicostata(Nilsson-Gantell,1930)]在我国东海的首次发现,扩大了本种在我国近海的分布区域。本种见于我国东海浪岗列岛高潮带,附着于生活在阴湿处岩缝中的龟足[Pollicipes mitella(Linnaeus,1758)]壳板上,是罕见种。     

Microdistribution of juveniles and adults of the mud crab Panopeus americanus (Brachyura,Panopeidae) in a remnant mangrove area in the southwest Atlantic

The distribution and density of a population of the narrowback mud crab Panopeus americanus were evaluated, with emphasis on the different developmental stages (juveniles and adults) and sexes. Specimens were collected in a remnant human‐impacted mangrove at Araçá on the northern coast of São Paulo, Brazil, at two‐month intervals from January through July 2006, using 1 m×1 m sample plots randomly distributed in the intertidal zone. The population was abundant, with a mean density of 14.3±9.3 individuals/m². Larger individuals were more abundant in the upper and middle intertidal zones, whereas smaller crabs were predominant in the lower intertidal and thus remained submerged longer. Males and juveniles were homogeneously distributed. Females preferred regions farther from the waterline. A clustered distribution pattern suggested gregarious behaviour and settling of juveniles in the vicinity of the adults' habitats, in an adaptive process as a function of tidal rhythms.     

我国东海小笠藤壶一种新记录(甲壳纲、围胸目)

本文描述了我国东海小笠藤壶属的一种新记录。多肋小笠藤壶[Tetraclitella multicostata(Nilsson-Cantell,1930)]在我国东海的首次发现,扩大了本种在我国近海的分布区域。本种见于我国东海浪岗列岛高潮带,附着于生活在阴湿处岩缝中的龟足[Pollicipes mitella(Linnaeus,1758)]壳板上,是罕见种。     

水产动物细胞培养方法及前景

综述了鱼虾贝类等水产动物细胞培养的方法,分析了动物细胞大规模培养过程中的问题与对策,展望了动物细胞培养的广阔前景.     

甲壳动物卵黄磷蛋白研究进展

在卵生动物中,雌性个体生殖细胞不仅为子代提供遗传物质基础,还必须为受精卵的进一步发育提供营养物质,卵黄磷蛋白作为一种蛋白贮藏物,是卵细胞形成期间积累在卵黄颗粒中的一种主要蛋白组份,它在胚胎发育中起着重要的作用,本就甲壳动物卵黄磷蛋白的生化特性,合成部位及其它生物学功能等做一综合评述。