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  • 1
    Electronic Resource
    Electronic Resource
    Microhabitat use by longfin eels in New Zealand streams with contrasting riparian vegetation (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 59 (2001), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Longfin eels Anguilla dieffenbachii caught by electrofishing, in Lee Stream, a tributary of the Taieri River, New Zealand, were significantly longer in pools than in riffles, particularly in summer. Longfin eels were generally shorter in sites with willow. More longfin eels were caught at pasture sites than tussock sites with fewest at sites with willow. Sites judged difficult to access by commercial fishermen had longfin eels that were significantly longer than those in easy-access sites. More than 80% of longfin eels were captured within 270 mm of banks. The first three components of a principal component analysis explained 40·3% of the variability in microhabitat character recorded at both the capture location and within 0·5 m of capture, and from random locations in each riparian category. Variables strongly associated with longfin eel capture locations were maximum depth (longfin eels used microhabitat of intermediate depth), distance to pool (intermediate), sediment size (finer), sediment depth (deeper), stream idth (intermediate) and flow velocity (slower). Overall there was a greater icrohabitat range in tussock sites but diurnal microhabitat use was most similar to what was available in pasture streams. Winter longfin eel locations were characterized by deeper and finer sediments in contrast to summer and spring locations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2001.tb00199.x
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  • 2
    Electronic Resource
    Electronic Resource
    A model to predict the presence of longfin eels in some New Zealand streams, with particular reference to riparian vegetation and elevation (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 58 (2001), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Two logistic regression models were developed from a database of 27 biotic and physicochemical variables for 99 sites in the Taieri River, New Zealand, to predict the probability of occurrence of longfin eels. Average depth was associated positively with eels while woody debris and oxygen concentration were negatively associated. At a macro-scale probability of eel occurrence declined with increasing elevation and, for a given elevation, was higher in tussock and pasture catchments and lower in pine and native forest settings. Using a separate fish database for the Taieri River this macro-scale model predicted eel presence 95·4% in agreement with observation. A map was generated from the model showing areas of predicted high, moderate and low probabilities of eel occurrence. The model also estimated the minimum total number of eels present in the Taieri River catchment (excluding lakes, and streams below 100 m and above 1000 m) as 20 865 (95% CL: 10 560-36 350).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2001.tb00558.x
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  • 3
    Electronic Resource
    Electronic Resource
    Riparian land use and accessibility to fishers influence size class composition and habitat use by longfin eels in a New Zealand river (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 61 (2002), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Fyke nets were used to sample longfin eels Anguilla die.enbachii in fourth order stream sites with contrasting riparian land use (native tussock, exotic pasture and pasture plus willows Salix spp.) in Lee Stream, a tributary of the Taieri River, New Zealand. Total lengths (LT) of longfin eels from locations inaccessible to eel fishers were normally distributed whereas those from accessible locations had a non-normal, positively skewed distribution. Mean LT and body condition were higher in inaccessible than accessible sites, consistent with considerable fishing exploitation in the latter. Mean LT of the fish was greatest in pasture, intermediate in willow and smallest in tussock sites. Larger longfin eels (≥535 mm) were associated with a riffle-type habitat consisting of shallow, faster-flowing water with coarse, variable sediment and were taken farther from cover. In contrast, smaller longfin eels were associated with a pool-type habitat consisting of slower-flowing, deeper water, with fine, homogenous sediment and were captured closer to cover. This pattern of habitat use differed from some previous reports and probably reflects differences in methodology: fyke nets set over 48 h to sample actively moving longfin eels compared to daytime electric fishing, which samples longfin eels that are more likely to be at rest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2002.tb02492.x
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  • 4
    Electronic Resource
    Electronic Resource
    Resolving ambiguities in the karyotype of domestic sheep (Ovis aries) (1993)
    Springer
    Chromosoma 102 (1993), S. 340-347 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The unambiguous identification of ovine chromsomes has become essential for the mapping of the sheep genome, which predominantly consists of telocentric chromosomes of gradually decreasing size. Nucleolus organizer regions (NORs) and Robertsonian fusions have been used here as the cytological and morphological markers, respectively, to define the banding pattern of eight paris of sheep telocentric chromosomes that have an ambiguous identification status. Five Robertsonian chromosomes involving most of the ambiguous chromosomes as well as normal prometaphase chromosomes were stained sequentially and separately by QFQ, GTG, and Ag-NOR methodologies. The prometaphase banding patterns of the ambiguous chromosomes 4, 6, 8, 9, 21, 24, 25 and 26 are represented schematically. For providing an accurate image of the banding pattern, a system of shading has been employed to show the relative intensity of bands in a given chromosome. The results presented here will facilitate the regional mapping of the sheep genome, extend the information on cytogenetic homology with other bovids, and substantially accelerate the comparative mapping studies in Bovidae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00661277
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  • 5
    Electronic Resource
    Electronic Resource
    Resolving ambiguities in the karyotype of domestic sheep (Ovis aries) (1996)
    Springer
    Chromosoma 105 (1996), S. 62-67 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. Internally consistent G-, Q- and R-banded karyotypes and idiograms for sheep chromosomes at the 422-band level of resolution are presented. These were derived by sequential Q- to G-staining, and sequential Q- to R-staining of prometaphase spreads prepared from sheep with normal and Robertsonian chromosomes. The fused chromosomes served as stable morphological markers. To minimise confusion due to chromosomal nomenclature, we have listed chromosome-specific (reference) molecular markers that have been mapped by in situ hybridization to sheep chromosomes. The use of molecular markers in conjunction with the sequential Q- to G- and sequential Q- to R-banded karyotypes and iodiograms provided here will elimiate ambiguities in identifying and numbering sheep chromosomes and will facilitate their comparison with cattle chromosomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004120050160
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  • 6
    Electronic Resource
    Electronic Resource
    Thirteen loci physically assigned to sheep Chromosome 2 by cell hybrid analysis and in situ hybridization (1995)
    Springer
    Mammalian genome 6 (1995), S. 862-866 
    Details
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Sheep x hamster cell hybrids containing sheep metacentric Chromosome (Chr) 2 were produced by fusing blood leukocytes from normal sheep with hamster auxotrophic Ade F-minus mutants. Cell clones that were isocitrate dehydrogenase 1 (IDH1) positive were cytogenetically characterized, confirming that they contained sheep Chr 2. The following loci were newly assigned by Southern hybridization to sheep Chr 2: lipoprotein lipase (LPL), glycoprotein-4-beta galactosyltransferase 2 (GGTB2), neurofilament light polypeptide (68 kDa; NEFL), surfactant-associated protein 2 (SFTP2), lymphocyte-specific protein tyrosine kinase (LCK), and nebulin (NEB). These new assignments and the in situ localization of gelsolin (GSN) to sheep Chr 2pter-p24 are consistent with the predicted homology of cattle Chr 8 (U18) with sheep Chr 2p, and of cattle Chr 2 (U17) with sheep 2q. In addition, the assignment by cell hybrid analysis of loci previously mapped to Chr 2 in sheep, viz., cholinergic receptor, nicotinic, delta polypeptide (CHRND), collagen type III alpha 1 (COL3A1), fibronectin 1 (FN1), isocitrate dehydrogenase (IDH1), and villin 1 (VIL1), confirmed the localization of sheep syntenic group U11 to this chromosome. By nutritional selection and complementation of the hamster auxotrophic Ade F mutation, the multifunctional enzyme locus phosphoribosylaminoimidazolecarboxamide formyltransferase (AICAR transformylase)/IMP cyclohydrolase (inosinicase) (provisionally given the symbol PRACFT) has also been newly assigned to sheep Chr 2. This report significantly extends the number of loci physically mapped to sheep Chr 2 and confirms its close homology with cattle Chrs 2 and 8.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00292436
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  • 7
    Electronic Resource
    Electronic Resource
    Four loci from human Chromosome 1 are physically assigned to sheep Chromosome 1p (1995)
    Springer
    Mammalian genome 6 (1995), S. 551-553 
    Details
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356176
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  • 8
    Electronic Resource
    Electronic Resource
    Present status of the ovine gene map (Ovis aries); comparison with the bovine map (Bos taurus) (1994)
    Springer
    Mammalian genome 5 (1994), S. 324-332 
    Details
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The status of the sheep map to the end of June 1993 is presented. Mapping information is available for a total of 107 loci comprising 16 anonymous DNA segments. This is an increase of 66 loci since 1990. No loci have been mapped on 10 of the 26 autosomes. Comparison of the cattle (350 loci) and sheep maps confirms their close evolutionary and genetic relationship and will reduce the effort required for their gene mapping.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356549
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  • 9
    Electronic Resource
    Electronic Resource
    Four human Chromosome 3q and four human Chromosome 21 loci map onto sheep Chromosome 1q (1995)
    Springer
    Mammalian genome 6 (1995), S. 202-205 
    Details
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Eight new loci have been assigned to sheep Chromosome (Chr) 1q by use of a chromosomally characterized minipanel of sheep x hamster cell hybrids. Four loci, which have been mapped to the distal region of human Chr 3q, are ceruloplasmin (CP), sucrase isomaltase (SI), glucose transporter 2 (GLUT2), and ectopic viral integration site 1 (EVI1). The other four loci, on human Chr 21, include interferon alpha receptor (IFNAR); interferon inducible protein p78, murine (MX1); collagen type VI, alpha 1 (COL6A1); and S100 protein, beta polypeptide (S100B). All of these loci, except GLUT2 and MX1, have been mapped onto bovine Chr 1 or are syntenic with loci on this chromosome. The in situ localization of transferrin (TF) to sheep Chr 1q42-q45 confirms our previous assignment of this locus and independently anchors the eight new syntenic loci to sheep Chr 1q.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00293014
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  • 10
    Electronic Resource
    Electronic Resource
    Comparative Genome Organization of Vertebrates (1996)
    Springer
    Mammalian genome 7 (1996), S. 717-734 
    Details
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003359900222
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