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1.
A new freshwater goby, Rhinogobius wuyanlingensis, was collected from Wuyanling National Natural Conservation Area, Taishun, Zhejiang Province, China. The species can be distinguished
from all congeneric species by the following unique combination of features: second dorsal fin rays modally I, 8; anal fin
rays I, 8; pectoral fin rays modally 18; longitudinal scale series 30–32; predorsal scales 7–9; vertebral count 10 + 17 = 27;
body always with six longitudinal pinkish orange to grayish brown lines from dorsal to ventral region in male; cheek spotless;
branchiostegal membrane deep grayish with 6–7 long, transverse deep red stripes in male; chin always deep grayish; first dorsal
fin with two long black blotches on membranes anterior to third spinous ray in male; second dorsal fin whitish with three
to four horizontal rows of light spots in male; caudal fin base with a large blackish-brown spot; and pectoral fin with a
horizontal, median blackish brown line. An artificial key to all five nominal species with a high vertebral count (27–29)
from Zhejiang Province from China is also provided. 相似文献
2.
A new species of genus Microrasbora Annandale (1918), M. microphthalma, is described from the Nanwan River, a tributary of the Ruili River, Irrawaddy drainage, in southwest Yunnan province, China.
This new species is the first record of the genus Microrasbora in China. Microrasbora microphthalma can be distinguished from the other species of Microrasbora by the following combination of characters: 15–16 predorsal scales, eye diameter/head length 27–38%, eye diameter/interorbital
width 70–93%, predorsal length/ standard length 60–68%, the preanal length/ standard length 65–71% and the origin of dorsal
fin is posterior of that of the ventral fin.
Xiao-Yong Chen and Jun-Xing Yang contributed equally to this paper. 相似文献
3.
A new freshwater goby, Rhinogobius wangi, was collected from a small tributary of the Hanjiang Basin, Guangdong Province, southeastern China. The species can be distinguished
from all congeneric species by the following unique combination of features: second dorsal fin rays I, 8; anal fin rays I,
7; pectoral fin rays 16; rather large scales as longitudinal scale series 26–27; predorsal scales 8–9; vertebral count 10 + 17 = 27;
seven parallel, deep brown oblique stripes crossing on cheek in male; branchiostegal membrane with brownish-red spots in male;
seven longitudinal deep brown lines on lateral side of body; pectoral fin base with a blackish-brown bar. A key to all nominal
species with high vertebral counts from China (Hanjiang to Chiangtangjiang basins), Taiwan, and Japan is also provided. 相似文献
4.
Mature zygotic embryos of recalcitrant Christmas tree species eastern white pine (Pinus strobus L.) were used as explants for Agrobacterium tumefaciens strain GV3101-mediated transformation using the uidA (β-Glucuronidase) gene as a reporter. Influence of the time of sonication and the concentrations of protein phosphatase inhibitor
(okadaic acid) and kinase inhibitor (trifluoperazine) on Agrobacterium-mediated transformation have been evaluated. A high transformation frequency was obtained after embryos were sonicated for
45–50 s, or treated with 1.5–2.0 μM okadaic acid or treated with 100–200 μM trifluoperazine, respectively. Protein phosphatase
and kinase inhibitors enhance Agrobacterium-mediated transformation in eastern white pine. A 2–3.5-fold higher rate of hygromycin-resistant callus was obtained with
an addition of 2 μM okadaic acid or 150 μM trifluoperazine or sonicated embryos for 45 s. Stable integration of the uidA gene in the plant genome of eastern white pine was confirmed by polymerase chain reaction (PCR), Southern and northern blot
analyses. These results demonstrated that a stable and enhanced transformation system has been established in eastern white
pine and this system would provide an opportunity to transfer economically important genes into this Christmas tree species.
Communicated by W. H. Wu 相似文献
5.
Ten specimens of a new freshwater goby, Rhinogobius longyanensis were collected from the small tributary of the Julongjiang Basin, Fujian Province, southeastern China. The new species can
be distinguished from all congeneric species by following unique combination of features: second dorsal fin rays I, 8; anal
fin rays I, 7–8; pectoral fin rays modally 17; longitudinal scale series 30–32; predorsal scales 6–8; vertebral count 10 + 17 = 27;
three parallel, deep brown oblique stripes crossing on cheek; branchiostegal membrane with 24–28 orange red spots in male;
body with 5–6 deep brown blotches; pectoral fin base with a blackish brown bar. A diagnostic key to all nominal species with
high vertebral counts from mainland Southeast Asia, China, Taiwan, and Japan is also provided. 相似文献
6.
A new balitorid fish,Hemimyzon nanensis, is described from the Mae Nam Nan River basin, a tributary of the Chao Phraya River, in northern Thailand. This species
is distinguishable from its congeners by the following unique combination of characters: pectoral fin with 9–11 simple and
10–12 branched, rays; pelvic fin with 3–4 (usually 3) simple and 8–9 (usually 9) branched rays; 59–63 total lateral line scales;
distance between pelvic fin bases 8.1–9,6% SL.H. nanensis is the first species of the genus recorded outside China and Taiwan. 相似文献
7.
Ronald Fricke 《Ichthyological Research》2007,54(1):68-73
The clingfish Apletodon wirtzi sp. nov. is described on the basis of ten specimens and colour photos from Bombom Island, Principe Group, Sao Tome and Principe,
eastern central Atlantic Ocean. The species is very small, apparently not exceeding 16 mm total length; it is characterized
by having three pores in the mandibular canal, the head length 2.2–2.5 in standard length: SL, the head broad, head width
in males 3.6–4.0 (mean 3.8) in SL, the snout in males long, more or less pointed, conical, preorbital length in males 3.1–4.0
in head length, the occipital region with a large pinkish blotch behind each eye (in alcohol specimens), and the lower sides
of the body with a row of dark blotches, scattered with white spots in between. The new species is compared with other species
of the genus; a key to the males of the four known species of the eastern Atlantic genus Apletodon is presented.
Supplementary material to this paper is available in electronic format at 相似文献
8.
Edward O. Murdy 《Ichthyological Research》1998,45(2):121-133
The gobioid genusGobioides Lacepède, 1800 shares with the amblyopine gobies (Gobiidae: Amblyopinae) an eel-like, elongate body with a continuous dorsal
fin and an affinity for shallow water, muddy bottom habitats. Due to similarities in external morphology and habitat requirements,
some workers consideredGobioides allied with amblyopine gobies. Others, however, dispute a close relationship betweenGobioides and the Amblyopinae; morphological and ecological similarities are considered to be homoplasious. Results of this study concur
with placingGobioides separate from amblyopine gobies and within the gobiid subfamily Gobionellinae.Gobioides is easily distinguished from the Amblyopinae by its larger eyes (small inGobioides vs. inconspicuous in the Amblyopinae), fewer dorsal and anal-fin rays (14–20 vs. 27–48), and different fin element to vertebra
ratios (1∶1 vs. 2∶1).Gobioides reaches lengths of 500 mm SL or greater whereas amblyopines rarely exceed 300 mm SL.Gobioides comprises five species (G. africanus, G. broussoneti, G. grahamae, G. peruanus, andG. sagitta). Although these gobies occupy habitats with similar conditions,Gobioides and amblyopines are nowhere sympatric.Gobioides occurs in tropical and subtropical coastal waters of the eastern and western Atlantic as well as the tropical eastern Pacific
Ocean. In the eastern Atlantic.Gobioides is known from Senegal to Zaire. In the western Atlantic.Gobioides is reported from South Carolina to southern Brazil. In the eastern Pacific,Gobioides is known from Mexico to Peru. 相似文献
9.
Ch. Mytilineou S. Kavadas C. -Y. Politou K. Kapiris A. Tursi P. Maiorano 《Hydrobiologia》2006,557(1):155-160
In the present study, the catch composition and the catch per unit effort (CPUE) by weight and numbers in red shrimps’ (Aristaeomorpha foliacea and Aristeus antennatus) grounds was examined in the southern part of the eastern Ionian Sea, in order to collect important information for the Greek
waters, where no deep-water fishery exists. In the depth stratum 500–700 m, the catch of the commercial species represented
a high proportion (>70%) of the total catch. Red shrimps and several other commercial species were found in important quantities.
The present results suggest the possibility of developing a deep-water fishery in Greece. In such a case, attention should
be paid because of the high vulnerability of A. foliacea – the main deep-water fishing resource in the area – to the fishing pressure. 相似文献
10.
Synopsis The reproductive biology of eastern sea garfish Hyporhamphus australis, eastern river garfish H. regularis ardelio, and snub-nosed garfish Arrhamphus sclerolepis were described throughout their respective ranges in the coastal waters of New South Wales (NSW), Australia. Peaks in gonadosomatic
indices indicated that spawning of eastern sea garfish occurred in late spring and early summer (November–December) on the
south coast of NSW, and in winter and early spring (June–September) on the north coast. Eastern river garfish spawned between
July and December in NSW estuaries and snub-nosed garfish spawned between October and January in the Clarence River. The sex
ratios in commercial catches of eastern sea garfish from the north coast of NSW were biased toward male fish, but approached
equality for fish caught from the south coast. Sex ratios were significantly biased toward female snub-nosed garfish, and
female eastern river garfish from all estuaries sampled. Mean (±SE) batch fecundity was 1498 ± 110 (range: 98 – 3449) ripe
oocytes per female for eastern sea garfish, 917 ± 36 (range: 102 – 2268) ripe oocytes per female for eastern river garfish,
and 716 ± 104 (range: 20 – 2956) ripe oocytes per female for snub-nosed garfish across the range of mature sizes examined.
There was a linear relationship between batch fecundity and fish size for all three species of garfish. Eastern sea garfish
approached 50% maturity at a larger size than snub-nosed, or eastern river garfish. Size at 50% maturity was similar for male
and female eastern river and snub-nosed garfish, but male eastern sea garfish matured at a significantly smaller size than
females. All three species appear capable of spawning in the spawning season immediately following the one in which they were
born. Mature female fish of all three species had distributions of oocyte diameters consisting of three or four modes, which
strongly suggests asynchronous oocyte development and a multiple spawning strategy during the spawning season. Implications
for the management of garfish fisheries in NSW are also discussed. 相似文献
11.
Stolephorus teguhi sp. nov. is described from the holotype and 14 paratypes, 49–77 mm in standard length, collected from North Sulawesi, Indonesia.
The species is characterized by having numerous gill rakers (31–35 + 41–46 = 72–82) and a short upper jaw, its posterior tip
reaching to or extending slightly beyond the anterior margin of the preopercle. Stolephorus pacificus and S. multibranchus also have relatively numerous gill rakers for species of this genus (21–27 + 29–36 = 53–61 and 21–28 + 30–35 = 54–60, respectively),
but counts for S. teguhi exceed those for the two species. Although S. advenus also has a short upper jaw similar to that of S. teguhi, the former has far fewer gill rakers (19 + 24 = 43) than the latter. 相似文献
12.
A new epigonid fish, Epigonus cavaticus, is described on the basis of eight specimens (59.2–69.5 in standard length: SL) collected from a cave at depth 20 m, southern
fringing reef of Ngemelis Island, Palau. The species differs from other congeners by having minute teeth on both jaws, no
opercular spine, pyloric caeca 7–8, gill rakers 25–27, total pored lateral line scales 48–50, dorsal fin rays VII-I, 10–11
(mode VII-I, 10), pectoral fin rays 16, vertebrae 10 + 15, body depth 21.4–25.0% SL, pectoral fin length 22.7–24.6% SL, eye
diameter 44.4–47.5% head length: HL, upper jaw length 40.2–42.5% HL. Four paratypes (63.7–66.8 mm SL) of the new species are
female with mature gonads, it is the smallest in size at sexual maturity among the congeners. 相似文献
13.
The systematics of the eelpout genus Bothrocara Bean 1890 is reviewed on the basis of 941 specimens. Eight mostly eurybathic, demersal species are recognized, distributed mainly along
the continental slopes of the North and South Pacific oceans, with one species entering the South Atlantic. Distributions
are: B. brunneum ranges from the Sea of Okhotsk to the Gulf of Panama at depths of 199–1,829 m; B. elongatum ranges from the Gulf of Panama to Chile at depths of 720–1,866 m; B. hollandi ranges from the Sea of Japan to the southeastern Bering Sea at depths of 150–1,980 m; B. molle ranges from the western Bering Sea to the South Atlantic at depths of 106–2,688 m; B. nyx is known only from the eastern Bering Sea at depths of 790–1,508 m; B. pusillum ranges from the northern Bering Sea to British Columbia, Canada, at depths of 55–642 m; B. tanakae is found along the northern coasts of Honshu and Hokkaido islands, Japan, at depths of 274–892 m; B. zestum ranges from the Izu Islands, Japan, and central Honshu, Japan, to the Gulf of Alaska at depths of 199–1,620 m (an unidentifiable
specimen from off Taiwan may be B. zestum). The species are distinguished from one another mainly on the basis of head pore patterns, gill raker morphology, coloration
and various meristic and morphometric values. A determination key to the species is provided. 相似文献
14.
Makoto Okamoto Keiichi Takeda Hiroya Sugisaki Takashi Asahida 《Ichthyological Research》2007,54(1):61-67
The early life stages of Lestidiops sphyraenopsis (Paralepididae) are described on the basis of 14 specimens [7.8 mm in notochord length (NL)–88.6 mm in standard length (SL)]
collected from the western North Pacific, and the holotype of Stemonosudis molesta is reexamined. Larval L. sphyraenopsis occurred in the Kuroshio waters, and juveniles were taken in the Kuroshio–Oyashio transition waters. Diagnostic characters
of larval and juvenile L. sphyraenopsis are 96–101 myomeres; 27–31 anal fin rays; 4–9 peritoneal pigment sections in larvae (7.8 mm NL–27.3 mm SL); dorsal and anal
pigment patches present; and anus located anterior to a vertical through dorsal fin origin. Stemonosudis molesta, known only from the holotype from the South Pacific, is similar to immature specimens of L. sphyraenopsis, but can be clearly distinguished from the latter by having higher vertebral counts (105 vs. 96–101) and by morphometric
and pigment differences. Consequently, S. molesta is a valid species, and the distribution of L. sphyraenopsis is restricted to the North Pacific. 相似文献
15.
在对海南省叶生地衣资源的调查研究中发现了中国肉盘衣属地衣新记录种:乳头肉盘衣[Fellhanera mastothallina(Vain.)Lücking&Sérus.],描述了其形态学、解剖学及化学特征,提供了显微结构照片.主要识别特征为:地衣体壳状,布满灰绿色乳头状颗粒,子囊盘棕色,囊盘被外部由疏丝组织构成,子囊孢... 相似文献
16.
A new species, Dolichopteryx rostrata, is described on the basis of a single specimen (66.2 mm in standard length) collected west of the Hebrides Islands, eastern
North Atlantic Ocean. The new species is characterized by an elongate snout and head, small pouchlike eyes, an adipose fin,
short dorsal fin base, anal fin base originating under dorsal fin base, a clear longitudinal suborbital brownish band extending
forward from behind posterior margin of orbit to snout tip, and 41 (=26 + 15) vertebrae. Total fecundity is low; the ovarian
eggs number only 473, despite the ovary having developed ova. Ovarian eggs could be clearly subdivided into an “undeveloped
group” (0.1–0.7 mm diameter classes, n = 405) and a “developed group” (0.9–1.3 mm classes, n = 68), based on their frequency distribution.
Supplementary material to this paper is available in electronic format at http://dx.doi.org/10.1007/s10228-005-0306-2 相似文献
17.
A few individuals with intermediate morphology always appeared in the sympatric distributions of Gentiana straminea and G. siphonantha. These intermediate individuals were hypothesized to be the hybrids of two species after a careful evaluation of their morphological
characteristics. To test this hypothesis, sequence comparison of the internal transcribed spacer (ITS) regions of the nuclear
ribosomal and trnS (GCU)-trnG (UCC) intergenic spacer region of the chloroplast DNA from Gentiana straminea, G. siphonantha and the putative hybrids was performed. The results suggest that most intermediate individuals were the natural hybrids between
G. straminea and G. siphonantha. In addition, we examined the sequence variation among the individuals of both parent species and analyzed the possibility
leading to the incongruent identification in some individuals based on morphologic and molecular evidences, respectively.
The intraspecific diversification of DNA fragments within both parent species and their high variability in hybrid swarms
probably resulted from chloroplast genome recombination and incomplete lineage sorting during the early stages of speciation
origin of the parent species.
__________
Translated from Acta Botanica Yunnanica, 2007, 29 (1): 91–97 [译自:云南植物研究] 相似文献
18.
Ten enzymes (AAT, CK, G3PDH, HEX, IDH, LDH, MDH, ME, PGI, PGM) were examined using horizontal starch gel electrophoresis to
estimate the levels of genetic variation within and among six natural populations of two grasshopper species Atractomorpha sinensis and A. peregrina from Shanxi, China. The collecting sites were geographically distant from each other from south to north: Quwo district,
Linfen city; Xiangyuan county, Changzhi; Jinyuan district, Taiyuan city; Yuanping county, Xinzhou city and Fanshi county of
Xinzhou.A. sinensis showed 43 alleles at 16 loci but A. peregrine showed 39 alleles at 15 loci (Idh-1 was deficient). The zymograms showed that some common alleles were shared at several loci in these two species (Aat-1-b, Aat-2-b, G3pdh-a, Ck-1-b and Ldh-b). However, Hex-1-a, Hex-2-a, Hex-3-a, Idh-2-b, Mdh-2-b, Mdh-1-f, Pgi-b, Pgm-b had common alles in A. sinensis and Hex-1-b, Hex-2-b, Hex-3-b, Idh-2-a, Mdh-2-a, Mdh-1-d, Pgi-a, Pgm-c were of high frequency in A. peregrine instead. Most of the observed genotype frequencies were found to significantly deviate from the Hardy-Weinberg expectations
in both species. A tendency of clinal distribution of allele frequency was observed at three loci. The frequency of the moderately
migrating allele Me-c (0.318–0.740) in A. peregrina, Hex-1-a (0.800–1.000) and Ldh-b (0.487–0.750) in A. sinensis demonstrated increased frequency from north to south. Such tendency suggests that the allele frequency in these three loci
may be correlated with the species’ geographic distributions. A. sinensis showed higher genetic diversity than A. peregrina as indicated by higher mean number of alleles per locus (A = 1.9–2.3 in A. sinensis and 1.7–2.2 in A. peregrina), percentage of polymorphic loci (56.3%–68.8% in A. sinensis and 43.8%–56.3% in A. peregrina), and the observed heterozygosities (H
o
= 0.072–0.096 in A. sinensis and 0.70–0.107 in A. peregrina). The observed heterozygosities of the six populations were all noticeably lower than the Hardy-Weinberg expectations, mostly
due to heterozygote deficiency in the populations of both species. The overall mean F
ST
were small (F
ST
= 0.045, P > 0.05 in A. sinensis populations and 0.087, P > 0.05 in A. peregrina populations). Nei’s genetic identity (I) estimates indicate low intraspecific (>0.95) but higher interspecific (0.377–0.447) genetic diversity. The cluster analysis
based on modified Roger’s genetic distance (D) showed that the two species were divided into two branches.
Both species are of limited dispersal capacity and a moderate geographical barrier might significantly restrict the gene exchange
among populations, resulting in accumulation of local genetic differentiations. The A. sinensis populations used in this study were separated from each other by 155.2 to 271.4 km and the A. peregrina populations were separated from each other by 78.8 to 174.9 km with observable physical barriers. The allozyme data showed
only minimal genetic differentiation at population level, most likely as a result of gene exchange. It is reasoned that natural
factors and human agricultural activities might have facilitated migration and dispersal for the two species.
__________
Translated from Acta Ecologica Sinica, 2005, 25(10): 2574–2481 [译自: 生态学报] 相似文献
19.
Berchemiella wilsonii var. pubipetiolata (Rhamnaceae) is an endangered plant with only four remnant populations in eastern China. Population genetic information is
essential for understanding population history and formulating conservation strategies for this species. Thirteen microsatellite
loci were used to investigate genetic variation and population structure of the four remnant populations. Moderate levels
of expected heterozygosity (H
E = 0.466–0.543) and low allelic diversity (A = 3.1–3.6 and A
R = 2.2–2.4, respectively) were observed within populations. Bottleneck tests found three out of four populations to deviate
from mutation-drift equilibrium under the two-phase model (TPM), suggesting a recent population decline, which is congruent
with known demographic history. The evolutionary history of the species seems dominated by genetic drift rather than gene
flow. Low historical gene flow was inferred from several different approaches and N
m ranged from 0.582 by the private allele method to 0.783 by the coalescent method. Contemporary gene flow was also found to
be even lower for only one first generation migrant was detected with individual-based assignment analysis. Restricted pollen
and seed dispersal as well as a recent decline in population size associated with habitat fragmentation may have contributed
to low levels of historical and contemporary gene flow, and resulted in a high genetic differentiation. Under this scenario,
Berchemiella wilsonii var. pubipetiolata populations are expected to display more pronounced population genetic structure in the future as a result of increased inbreeding
and genetic drift. 相似文献
20.
Yukio Iwatsuki Seishi Kimura Hirokazu Kishimoto Tetsuo Yoshino 《Ichthyological Research》1996,43(4):417-429
Gerres macracanthus Bleeker, 1854, for many years having been explicitly or tentatively synonymized withG. filamentosus Cuvier, 1829, is redescribed as a valid species.Gerres macracanthus differs fromG. filamentosus in lacking vertical rows of dark ovoid spots on the body, having instead only indistinct vertical bands in both subadult
and adult stages, in addition to shorter second and third anal fin spines (9.1–13.9% and 10.4–14.4% of standard length [SL]
vs. 12.3–19.6% and 11.9–17.3% of SL), fewer ored lateral line scales (41–44 vs. 43–46) and fewer scales between the base of
the 5th dorsal fin spine and the lateral line (4–5 vs. 4 1/2–5 1/2), and above and below the lateral line (5 1/2–6 1/2/9 1/2–10
1/2 vs. 6 1/2–7 1/2/10 1/2–11 1/2). AlthoughG. filamentosus has similarly, indistinct vertical bands on the body up to ca. 100 mm SL, specimens over ca. 100 mm SL develop diffuse ovoid
spots in each vertical band. Furthermore,G. macracanthus is generally a smaller species, apparently attaining a maximum size of ca. 170 mm SL, compared with ca. 250 mm SL forG. filamentosus. Formerly known from the Philippines, Indonesia, New guinea, India and the Arabian Gulf,G. macracanthus is newly-recorded from Japan, China, the Gulf of Thailand, the Red Sea and South Africa. A lectotype and three paralectotypes
are designated forG. macracanthus Bleeker, 1854, in addition to a neotype forG. filamentosus Cuvier, 1829. 相似文献