Three new species of free‐living marine nematodes from the Bohai Sea and Yellow Sea,China

Three new species of marine nematodes belonging to the genera Paranticoma (family Anticomidae) and Parodontophora (family Axonolaimidae) are described from the Bohai Sea and Yellow Sea. Paranticoma tricerviseta sp. nov. is similar to P. bandaenseMicoletzky and Kreis, in the spicules, but can be distinguished by the presence of a ventral projection on the spicules, three regularly arranged cervical setae in both the male and female, and two distinct ventral setae behind the anus. Parodontophora deltensis sp. nov. is close to P. paragranulifera (Timm, ) in the length of the amphids, with the ventral arm of the amphid extending past the base of the stoma, but can be separated by the ratio of dorsal arm length to ventral arm (0.36–0.55 versus 0.20–0.25) and the position of the excretory pore (at the middle level versus top level of the stoma), distinctive cervical setae arrangement and a longer renette cell. Parodontophora wuleidaowanensis sp. nov. is close to P. danker Belogurov and Kartavtseva, in the form of the amphids, but can be distinguished by the longer length of the ventral arm of the amphids and the distinctive arrangement of cervical setae.     

The genera Parotoplana Meixner, 1938 and Parotoplanella Ax, 1956 (Platyhelminthes: Proseriata) in southern Spain

Collecting in southern Spain yielded five species of Parotoplana and one species of Parotoplanella (Proseriata: Otoplanidae). Four species of Paratoplana proved to be new to science. Parotoplana cucullata sp. n. is distinguished by the shape of the lateral spines in the copulatory organ and in the presence of a “glandular organ” around the distal portion of the female duct. Parotoplana fretigaditani sp. n. is similar to P. procerostyla Ax, 1956 Ax, P. 1956. Monographie der Otoplanidae (Turbellaria): morphologie und systematik.. Akademie der Wissenschaften und der literatur Abhandlungen der Mathematisch‐Naturwissenschaftlichen klasse, 13: 159–278.  [Google Scholar] in the general arrangement of spines, but their fine morphology is distinctive. Parotoplana varispinosa sp. n. differs from P. capitata Ax, 1956 Ax, P. 1956. Monographie der Otoplanidae (Turbellaria): morphologie und systematik.. Akademie der Wissenschaften und der literatur Abhandlungen der Mathematisch‐Naturwissenschaftlichen klasse, 13: 159–278.  [Google Scholar] in the shape and number of spines. Parotoplana mastigophora sp. n. has a unique morphology of the stylet, and the spines of the girdle markedly differ in size and shape. The karyotype of P. cucullata sp. n. (n = 6) is described. In addition, Parotoplana primitiva and Parotoplanella heterorhabditica, previously known from the Atlantic coast of France and north‐west Mediterranean, respectively, were found. The high proportion of new species demonstrates the present poor state of knowledge of interstial meiofauna.     

Description of four new species of the genus Ampelisca (Amphipoda,Ampeliscidae) from the northeastern and southeastern coasts of Brazil and designation of a neotype for Ampelisca soleata Oliveira, 1954

The present study raises the number of Ampelisca species recorded from the Brazilian coast from 18 to 21. The amphipod fauna of the Brazilian northeast coast is hardly known compared to that of the southeast coast. In this study, we describe three new species from the northeast coast: Ampelisca pseudobicarinata sp. nov., Ampelisca rocasensis sp. nov. and Ampelisca cristianae sp. nov, recorded previously as Ampelisca aff. lobata (Serejo et al. 2000 Serejo, CS, Wakabara, Y and Valério-Berardo, MT. 2000. Taxonomy and geographic distribution of Ampelisca (Amphipoda: Gammaridea) from the Brazilian coast. Polsk Archiw Hydrobiol., 47(3–4): 495–510.  [Google Scholar]). We also report a new record of Ampelisca burkei Barnard and Thomas, 1989 Barnard, JL and Thomas, JD. 1989. A new species, Ampelisca burkei, (Crustacea, Amphipoda) from Florida. Proc Biol Soc Washington., 102(2): 375–384.  [Google Scholar]. From the southeast coast a new species Ampelisca angraensis sp. nov. is described. An obscure species, Ampelisca soleata, which is very similar to Ampelisca brevisimulata, is herein redescribed and a neotype is designated. An updated key with all species of Ampelisca recorded from the Brazilian coast and comments on geographic distribution are given.     

Lernanthropus antofagastensis sp. nov. (Copepoda: Lernanthropidae) parasitic on Anisotremus scapularis in Chilean waters,and new records of Lernanthropus trachure (Brian, 1903)

Lernanthropus antofagastensis sp. nov., parasitic on Anisotremus scapularis, and inshore fish of Antofagasta, Chile, is described and illustrated. It resembles five other species of Lernanthropus in its dorsal plate and third leg, but can be distinguished from them by a combination of characters. L. trachuri Brian, 1903, is recorded, its male described and illustrated from specimens collected from Seriolella violacea and Trachurus murphy, taken in the same locality.     

第四代管理系统在优化机舱管理中的应用(英文)

机舱被誉为船舶的心脏,为船舶提供主要动力来源.优化机舱管理将对航运效率和安全提供有效保障.结合机舱管理实际,讨论如何运用第四代管理系统的理论进行轮机管理的优化.     

Swedish nemerteans (phylum Nemertea), with description of a new hoplonemertean genus and species

A survey of the nemertean fauna along the Swedish west coast found specimens of 20 genera and 32 species, of which one genus and species is new to science (Tetraneuronemertes lovgreni gen. et sp. n.). The proportions of the three taxa Hoplonemertea, Heteronemertea, and Palaeonemertea are 34, 55, and 11%, respectively, with respect to specimen numbers, and the proportions for species within these taxa are 53, 31 and 16%, respectively. The most common species encountered during the survey were the heteronemerteans Lineus bilineatus, Micrura fasciolata, and Micrura purpurea, the hoplonemertean Nipponnemertes pulcher, and the palaeonemertean Cephalothrix rufifrons.     

基于图书馆系统对学风评价的实证研究

自主学习是学风评价的重要指标之一。图书馆作为培养优良学风的重要阵地,可以利用自身系统的优势,对自主学习学风评价指标进行数值量化,对学风进行客观、有真实数据支撑的评价,从而引导和促进学风建设。     

广西涉海工程项目建设对海洋环境的影响分析

分析广西涉海工程项目建设现状及其对海洋环境的影响,提出海洋环境保护建议,为广西海洋资源的可持续利用和海洋经济的可持续发展提供参考.     

烧结气氛对注射成形Fe/2Ni合金性能的影响

在H2 ,H2 N2 及真空气氛下对Fe/ 2Ni合金进行了烧结 ,讨论了烧结气氛对合金碳含量以及合金力学性能的影响 ;指出烧结气氛是通过H2 N2 混合气氛中H2 脱出合金中的碳 ,从而影响合金的最终组织来影响合金力学性能的 ,因此可以通过控制烧结气氛中的H2 的含量来控制合金中的碳含量 ,以得到所需的力学性能 ;并对合金脱碳机理作了初步探讨