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1.
Sean J. Handley 《新西兰海洋与淡水研究杂志》2013,47(4):681-687
Larvae of Boccardia knoxi (Rainer) were reared in the laboratory after dissection from brood capsules extracted from the outer shell and perio‐stracum of Cookia sulcata and Haliotis iris collected from Tasman Bay, New Zealand. All the eggs within each brood capsule developed into embryos. The dissected larvae had provisional setae and fed on phytoplankton. Larval development is described through to metamorphosis. 相似文献
2.
I. K. G. Boothroyd 《新西兰海洋与淡水研究杂志》2013,47(4):775-788
Cricotopus van der Wulp and Paratrichocladius Santos Abreu are among the most common genera of Chironomidae found in fresh waters throughout New Zealand. Imago, pupa, and fourth (final) instar larva of Cricotopus hollyfordensis n. sp. are described, and the male imagines, pupae, and larvae of Cricotopus zealandicus Hutton and Para‐trichocladius pluriserialis Freeman are redescribed from new material. C. hollyfordensis n. sp. can be distinguished from other Cricotopus species by antennal ratio and absence of tibial and abdominal markings in the male imago; shape and form of the thoracic horn, distinctive abdominal spinule patterns and lateral setae in the pupa; and mentum and mandible characteristics in the larvae. The combination of tibial and abdominal markings of the male imago; thoracic horn and abdominal spinule patterns of the pupa; and mentum and mandible characteristics of the larva distinguish C. zealandicus from P. pluriserialis and all other New Zealand Cricotopus species. P. pluriserialis is distinguished from Cricotopus species by the presence of normal and erect dorsocentral setae in the adult; smooth thoracic horn and distinctive abdominal spinule patterns of the pupa; mentum and mandible characteristics, supra‐anal setae longer than 2–3 abdominal segment lengths, and abdominal setae simple, never in tufts, in the larva. C. hollyfordensis n. sp. has been recorded from a fast flowing mountain 相似文献
3.
Janet M. Bradford‐Grieve 《新西兰海洋与淡水研究杂志》2013,47(4):781-793
Two species of benthopelagic calanoid Copepoda, Neoscolecithrix cf. magna (Grice, 1972) and N. ornata n. sp., are described from the upper slope off North Cape, New Zealand. Neoscolecithrix ornata is distinguished from other species of Neoscolecithrix Canu, 1896 s.s. that have a female leg 5 terminal segment with 4 spines (2 terminal and 1 on each border) principally by the transverse row of long, fine spines on the female genital double somite; and by the more squat terminal segment of leg 5 (length/width ratio about 3.7). This is the second time Neoscolecithrix has been recorded from New Zealand. A new genus, Cenognatha n. gen., is distinguished from Neoscolecithrix principally because: rostrum short (bearing 2 filaments); mandibu‐lar gnathobase masticatory margin with slender dorsal spinulose seta; maxilla endite 1 with 5 well‐developed setae, endite 3 without brush‐like sensory seta, endopod usually with 3 long worm‐like sensory setae and 5 brush‐like setae; posterodistal border of basis of legs 1–3 without spines; distal segment of female leg 5 and its basis subequal in length; male leg 5 of similar lengths on both sides (styliform on right), endopod present at least on 1 side, 1‐segmented and spine‐like on right. 相似文献
4.
One new species of free-living marine nematodes Enoplus taipingensis sp.nov.from the rocky intertidal seaweeds in the Taiping Bay,Qingdao is described and illustrated with scanning electron microscopy observation and 18S rRNA gene sequence analysis.Enoplus taipingensis is characterized by special arrangement of lateral setae on the tail,three cervical setae,distal structure on the supplement,and much longer body length with bigger De Man ratio "a".Type specimens are deposited in the College of Marine Life Science,Ocean University of China. 相似文献
5.
于东海陆架沉积物中发现并描述一自由生活海洋线虫新种：镰刀光皮线虫Actinonema falciforme sp.nov.镰刀光皮线虫的主要鉴定特征为：六根外唇刚毛和四根头刚毛成一圈;表皮具复杂而前后不同的装饰和侧分化;大而明显的化感器椭圆形,中间具一横裂口;单前精巢,反折;前后双卵巢,反折;缺失交接刺和引带,仅具有镰刀形引带侧件。在光皮线虫属中,只有镰刀光皮线虫和长尾光皮线虫A.longicaudatum缺失交接刺和引带,而仅具有引带侧件。镰刀光皮线虫可根据较短的体长、镰刀形引带侧件和较短的尾部而区别于长尾光皮线虫。 相似文献
6.
Craig B. Kensler 《新西兰海洋与淡水研究杂志》2013,47(2):143-155
Fecundity in Jasus verreauxi (H. Milne Edwards, 1851) has been studied by a detailed investigation of (a) the total weight of eggs carried by female specimens, (b) the average number of eggs per 1 g sample, and (c) the total number of eggs carried by females. In mid October 1966, 217 females “in berry” (that is, carrying external eggs) were examined and measured at Spirits Bay, New Zealand. The fecundity study is based on the results obtained from 21 selected specimens, with carapace lengths from 15.5 cm to 23.5 cm. A direct relation was found between the total weight of eggs carried and increase in carapace length. The total weight of eggs carried varied from about 51 g to 238 g for carapace lengths of 15.5 cm to 23.5 cm. No correlation was shown between the average number of eggs per 1 g sample and increase in carapace length. Considerable variation was noted in the number of eggs per 1 g sample, which ranged from a low count of 6,453 eggs to a high count of 8,341 eggs. The total number of eggs carried by female J. verreauxi was found to be related to an increase in carapace length. Furthermore, increase in fecundity per relative carapace length increase was noted to be greater in smaller specimens than in larger specimens. The total number of eggs carried ranged from about 385,000 for a carapace length of 15.5 cm to 1,940,000 for a carapace length of 23.5 cm. Fecundity, as measured by the total weight of eggs carried and the total number of eggs produced, was found to be much higher in J. verreauxi than in several Jasus species previously studied by other workers. 相似文献
7.
Experiments were carried out on the toxicity of a fuel oil to developing embryos and juveniles of two marine amphipods. Parhyale hawaiensis eggs were able to develop from early germinal disc stage (early eggs) to juvenile form in concentrations of 10 (2 ppm) up to 40% (8 ppm) WSF, but deleterious effects were evident in hatching success of eggs and survival of juveniles at concentrations ≥ 10% WSF. The juveniles that hatched from those eggs in higher WSFs had greater mortality than the juveniles that hatched from the eggs exposed to lower WSFs. Survival of juveniles from late eggs (cephalic region differentiated) was also greater than those from early eggs. Amphithoe valida eggs were more sensitive to the WSF of fuel oil than the eggs of P. hawaiensis; < 10% of the test eggs hatched in the 4 ppm WSF compared with 66% of P. hawaiensis eggs at the same concentration. The toxicity of fuel oil to the two amphipod eggs is therefore dependent on the concentration and duration of exposure on the one hand, and on the developmental stages and probably the nature of the egg case on the other. 相似文献
8.
Janet M. Bradford‐Grieve 《新西兰海洋与淡水研究杂志》2013,47(4):941-949
Xantharus Andronov, 1981 is reported, for the first time from New Zealand, from the upper slope (306 m) off the southeastern coast of North Island (41°04.10′S, 176°22.05′E). Xantharus cryeri n. sp. females differ from the three known species by a combination of characters: antennules that extend to the distal border of pedigerous somite 2; ancestral segment XVIII of the antennule with 1 seta; mandible basis with 3 setae; maxilla endite 1 with 5 setae; leg 1 basis with inner distal border lined with small spinules; and leg 5 is squat, with all segments as long as wide and the 2 terminal spine‐like extensions of the terminal segment approximately as long as the articulated, inner, subterminal spine. 相似文献
9.
HUANG Yong 《海洋学报(英文版)》2012,31(1):95-97
One new species of free-living marine nematode Cephalanticoma brevicaudata sp. nov. from the South China Sea is described. Cephalanticoma brevicaudata sp. nov. is characterized by spindle body with relatively short tail; head with cephalic capsule; three teeth at anterior of pharynx; excretory pore opens posterior to cervical setae; three cervical setae per file; spicules arcuate, cephalate and ventrally bent proximally, and blunt distally, 1.8 a.b.d. long, without ventral ala; gubernaculun slender, simple rod, without apophyses; tubular supplement 34 μm long, 2.3 a.b.d. in front of cloaca. 相似文献
10.
作者以山东烟台养马岛采集的未受扰动的样品为研究材料,对中国黄海潮间带自由生活线虫的种类和多样性展开研究,发现两个新纪录种八棘单茎线虫(Monoposthia octalata Galtsova,1976)和瑞氏拟单宫线虫(Paramonohystera riemanni (Platt,1973) Lorenzen,1977)并进行描述。八棘单茎线虫主要特征为体表具有八排侧装饰,化感器呈圆形、较小,口腔具有一个大的背齿,口腔前端具有明显角质化波浪形的结构,无交接刺,引带作镰刀状,尾呈锥状。标本特征与Galtsova描述的模式标本特征基本吻合,只是黄海的标本虫体稍长,化感器略大,引带稍长。瑞氏拟单宫线虫主要特征为虫体较细,头刚毛短,化感器呈圆形位于口腔后部,口腔内不具齿,交接刺稍弯曲,为对应体径的4.1倍,引带简单,尾细长呈纤毛状。标本特征与Platt描述的模式标本特征基本吻合,只是黄海的标本虫体稍长,头刚毛和尾部更长,交接刺略长。 相似文献
11.
描述了采自东海陆架沉积物中自由生活线虫Hopperia和Nemanema属的两个新种。新种大化感器霍帕线虫主要特征是螺旋形化感器5圈,较大;弓形交接刺近端宽大具有中肋,延伸至三分之一处;引带具有弯曲的引带突;6个乳突状的肛前辅器;锥柱状尾具有膨大的末端和尾端刚毛。新种小线虫的主要特征是身体大小是属内最小的;具有较大的椭圆形化感器;尾锥状;交接刺细,具有腹面翼膜,近端弯钩状;引带环形;1个肛前辅器乳突状,其上着生3条刚毛。更新完善了Hopperia属17个种的二岐检索表。 相似文献
12.
作者详细观察并记录了中国山东烟台优势种卵圆扁蝼蛄虾鳃虱(Gyge ovalis Shiino,1939)的形态学特征,比较了不同地域该种的形态学差异,应用扫描电镜技术,发现了该物种雄性个体的关键鉴定特征。研究结果表明:中国、日本、韩国的卵圆扁蝼蛄虾鳃虱在形态特征方面雌性个体差异较大,雄性个体差异较小;卵圆扁蝼蛄虾鳃虱的地理分布相对较集中,主要分布在中国山东和台湾两省、韩国、日本,确定其为亚洲特有种;通过扫描电镜,首次发现卵圆扁蝼蛄虾鳃虱的雄性个体中腹突上有呈鳞片状分布的"锯齿"状刚毛。 相似文献
13.
莱州湾鱼卵、仔稚鱼数量分布及其与环境因子相关关系研究 总被引：4，自引：0，他引：4
于2007年和2008年6月、8月,用大型浮游生物网对莱州湾鱼卵、仔稚鱼种类组成与数量分布进行了4个航次调查。结果表明,采集到11271粒鱼卵,隶属于4目、15科、22种(不包括2个未定名物种);仔稚鱼2942尾,隶属于4目、9科、12种(不包括2个未定名物种)。6月份是莱州湾大部分鱼类主要产卵期,鱼卵、仔稚鱼种类达25种,鱼卵优势种以斑(Clupanodon punctatus)和凤鲚(Coilia mystus)为主;仔稚鱼优势种以凤鲚、梭鱼(Mugil soiuy)和斑为主。8月份产卵的鱼类较少,仅采集到15种鱼卵、仔稚鱼,优势种均以凤鲚和鲈鱼(Lateolabrax japonicus)为主。鱼卵、仔稚鱼平面分布极不均匀,黄河、广利河和老弥河口附近海域数量较多,莱州湾中部海域数量较少。通过SPSS软件分析发现,鱼卵数量与仔稚鱼、表层铵盐含量呈显著正相关(r=0.438,0.604,P0.01),与盐度、透明度呈负相关(r=-0.343,-0.329,P0.05);仔稚鱼数量仅与鱼卵数量和表层铵盐含量呈显著正相关(r=0.438,0.536,P0.01),与其它环境因子没有明显相关关系(P0.05)。 相似文献
14.
Craig B. Kensler 《新西兰海洋与淡水研究杂志》2013,47(1):81-89
Fecundity in the New Zealand spiny lobster Jasus edwardsii (Hutton) has been investigated by a detailed examination of 14 selected females “in berry” (i.e. carrying external eggs), ranging in carapace lengths from 9.5 cm to 17.0 cm. The following data were obtained for each specimen: (a) the total weight of eggs carried, (b) the average number of eggs per 1 g sample, and (c) the total number of eggs carried. A positive correlation was noted between the total weight of eggs carried and increase in carapace length. The total weight of eggs carried ranged from 26.9 g in a small specimen of 9.5 cm C.L., to 123.9 g in a large female of 16.0 cm C.L. No relation was found between the average number of eggs per 1 g sample and increase in carapace length. A low count of 3,541 eggs per 1 g sample was recorded, and a high count of 5,005 eggs. A direct relation was noted between the total number of eggs carried by J edwardsii and increase in carapace length. The number of eggs carried ranged from a low figure of about 124,278 in a small specimen of 9.5 cm C.L., to a high figure of about 538,242 in a large female of 17.0 cm C.L. The rate of increase in fecundity was found to be greater in smaller than in larger females of J. edwardsii 相似文献
15.
鱼卵和仔稚鱼在海洋生态系统能量传递中起重要作用,作为渔业资源的早期补充群体,其分布、群聚结构对评估渔业资源和保护渔业资源具有重要意义。为了解三门湾鱼卵、仔稚鱼群聚结构时空变化规律,对该海域鱼卵、仔稚鱼进行春、夏两季调查,分析了该海域鱼卵、仔稚鱼组成及群聚结构变化等特征。结果发现:(1)两季共鉴定出鱼卵、仔稚鱼8目21科40种,其中定性样品鱼卵、仔稚鱼8目21科36种,定量样品鱼卵、仔稚鱼4目11科24种;鱼卵优势种为斑鰶(Konosirus punctatus)、鲷科未定种(Sparidae)、蓝点马鲛(Scomberomorus niphonius)、鮻(Liza haematocheila)、舌鳎属(Cynoglossus spp.)、石首鱼科未定种(Sciaenidae)、小公鱼属(Stolephorus spp.);仔稚鱼优势种为鮻、孔虾虎鱼(Trypauchen vagina)、小公鱼属、细棘虾虎鱼属(Acentrogobius spp.)、缟虾虎鱼属(Tridentiger spp.)。(2)三门湾湾内与湾外鱼卵、仔稚鱼群聚的组成存在显著差异,且湾内密度均高于湾外,反映出优势种鱼类在产卵季对于水文环境(如海流、温度)的空间响应。(3)三门湾鱼卵、仔稚鱼的群聚组成季节波动明显,主要由鱼类产卵的季节节律以及以洄游习性等差异形成。结果表明,三门湾鱼卵、仔稚鱼群聚结构空间、季节差异明显,与历史资料相比,鱼卵、仔稚鱼资源从“年际”短时间尺度看已初步显现一定恢复态势。 相似文献
16.
The catchability of western rock lobsters (Panulirus cygnus) during the spawning season (October and November) may be affected by their reproductive state. In this study, movement and food consumption of males and females of different reproductive states held in laboratory tanks were measured as proxies for catchability. Density of lobsters was found to influence both movement and food consumption. Solitary animals and, to a lesser extent, two lobsters per tank, were more sedentary and consumed significantly less food than animals at a density of three or four specimens per tank. Tests using three animals per tank confirmed that mature, unmated, and ovigerous females carrying early stage eggs moved more frequently away from their shelters than males or females carrying late stage eggs (P < 0.0001, d.f. = 3). Further, unmated females and females with early stage eggs recorded significantly higher food consumption (P < 0.0061, d.f. = 3) compared with males or females carrying late stage eggs. The greater time spent away from shelter and also food consumption make unmated females and females with early stage eggs likely to be more catchable than males or females with late stage eggs. As catchability is commonly used to obtain population estimates from survey data, these results have implications for surveys which use catch rates of breeding animals as indicators of egg production. 相似文献
17.
针飞鱼属Oxyporhamphus Gill(1863)是飞鱼中形态最原始的种类.其地理分布集中于太平洋、印度洋和大西洋的热带海域.针飞鱼是大洋性小型上层鱼类,也是大洋鱼类区系营养相互关系中的重要环节;它们既可为人类食用,亦是大洋重要经济鱼类(如金枪鱼、旗鱼、枪鱼、鲯鳅等)的天然食饵,故能利用飞鱼类“集群”的习性和明显起飞的特征刘断大洋经济负类的踪迹.因此,对飞鱼类的研究,具有特别重要的意义. 相似文献
18.
渤海自由生活海洋线虫两个新种(英文) 总被引：3，自引：1，他引：3
张志南 《中国海洋大学学报(自然科学版)》1991,(2)
渤海自由生活海洋线虫两个新种,海异齿线虫Parodontophora marina n.sp.(嘴刺目、轴线虫科)和异毛联体线虫Paracomesoma heterosetosum n.sp.(色矛目、联体线虫科);前者来自渤海莱州湾的DA_2和DA_4站,水深分别为20和16m;后者来自大连夏家河子砂质滩中潮带。新种海异齿线虫与日本海齿线虫(P.marisjaponici Platonova,1971)十分相似,但新种有规则排列的颈刚毛(雄性和雌性的颈刚毛排列式均为(3D—2V)2,排泄细胞大且排泄孔开口于口腔中部的腹部表面。新种异毛联体线虫的雄性交接器为本属相对最长者,为肛径的7倍,化感器之后成对的颈刚毛以及de Man比值明显地高于本属所有的种。本文提供了包括这两个新种在内的两个属双歧式检索表。模式标本保存在青岛海洋大学海洋生物系。 相似文献
19.
在对东海的自由生活海洋线虫进行分类和多样性研究中,发现2个我国新纪录种并进行了描述。深海螺旋球咽线虫Spirobolbolaimus bathyalis Soetaert&Vincx,1988的主要鉴别特征为:体表具显著的环纹,头感觉器呈乳突状,化感器螺旋形,口腔中部具有一个背齿以及一对亚腹齿,咽前后各有一个咽球;具有两条弧形的交接刺,引带呈板状,无肛前辅器,具两个反向排列的直伸精巢。伸长丝瘤线虫Filoncholaimus prolatus Hopper,1967的主要鉴别特征为:体表光滑,内唇感觉器乳突状,十根头刚毛,口腔具一背齿及两个等大的亚腹齿,尾锥状,渐变为长丝状,锥状部分具尾刚毛;交接刺呈弧形,引带简单,板状,无引带突,具两个乳突状的肛前辅器和两个反向排列的直伸精巢。 相似文献
20.
Many estuarine and coastal planktonic copepods depend on the hatching of benthic resting eggs for recruitment of nauplii to the water column population. The distribution and abundance of viable resting eggs of Acartia pacifica in the Xiamen Bay were determined by the presence of nauplii in the laboratory. The number of viable eggs varied temporally and spatially. The maximum number (9.2×104m-2) of viable eggs was in summer. In spring the average abundance of viable eggs was 5.6×104 m-2. The abundances of viable eggs in fall and winter were similar, respectively 2.7×104 and 3.3×104 m-2, which were the lowest in the year. The numbers of viable eggs inside the stations of the Xiamen Bay were higher than those outside the stations. The viable eggs were found at all depths (0～10 cm),although not in every station. The maximin number did not necessarily occur in the uppermost centimeter of the sediments but often occurred several centimeters below the water-sediment interface. The accumulation of viable eggs in the seabed of a subtropical bay constitutes a potential source of recruitment of nauplii into the pelagic population. 相似文献