Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Tidal Influence on Spatial Dynamics of Leopard Sharks, Triakis semifasciata, in Tomales Bay, California (2000)
    Springer
    Environmental biology of fishes 58 (2000), S. 33-43 
    Details
    ISSN: 1573-5133
    Keywords: movement behavior ; tracking ; elasmobranch ; ultrasonic telemetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We used ultrasonic telemetry to determine the movement directions and movement rates of leopard sharks, Triakis semifasciata, in Tomales Bay, California. To analyze tide and time of day effects, we surgically implanted transmitters in the peritoneal cavities of one male and five female leopard sharks, which we located during summer for three to five sampling sessions lasting 12 to 24 h each. All leopard sharks showed strong movement direction patterns with tide. During incoming tides, sharks moved significantly (p〈0.0001) towards the inner bay, apparently to exploit the extensive inner bay muddy littoral zones' food resources. On outgoing tides, sharks showed significant (p〈0.0001) movements towards the outer bay. During high tide, there was no discernible pattern to their movements (p=0.092). Shark movement rates were significantly (p〈0.0001) greater during dark periods (mean±SE: 10.5±1.0 m min−1), compared with fully lighted ones (6.7±0.5 m min−1). Movement rates of longer sharks tended to be greater than those of shorter ones (range means±SE: 5.8±0.6 m min−1 for the 91 cm shark, to 12.8±1.6 m min−1 for the 119 cm shark), but the leopard sharks' overall mean movement rate (8.1±0.5 m min−1) was slower than other (more pelagic) sharks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007657019696
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Diel Movements of Bat Rays, Myliobatis californica, in Tomales Bay, California: Evidence for Behavioral Thermoregulation? (2000)
    Springer
    Environmental biology of fishes 58 (2000), S. 173-182 
    Details
    ISSN: 1573-5133
    Keywords: elasmobranch ; movement behavior ; Myliobatidae ; tracking ; ultrasonic telemetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We used ultrasonic telemetry to examine movement patterns of 11 bat rays, Myliobatis californica, in Tomales Bay, California. Tomales Bay is long (20 km) and narrow (1.4 km), and is hydrographically separated into outer and inner bay regions. The outer bay (the outermost 8 km) is characterized by oceanic conditions while the shallow inner bay (the innermost 12 km) features wide seasonal temperature shifts. Five rays were tracked monthly from October 1990 to November 1991 and six rays (four of which carried temperature-sensing transmitters) were tracked daily from 30 June to 16 July 1992. Mean bat ray movement rate was 8.84 m min−1 (range 4.49 to 13.40 m min−1) and was not significantly affected by size (p=0.592), tidal stage (p=0.610), or time of day (p=0.327). Movement direction was unrelated to tidal stage (p=0.472) but showed a highly significant diel pattern (p〈0.001). From 2:50–14:50 h, rays moved toward the warmer and shallower inner bay, while from 14:50–2:50 h they moved toward the cooler and deeper outer bay. These telemetry data, along with known bat ray foraging patterns and respiratory temperature-sensitivity, argue for behavioral thermoregulation as the primary influence on this movement pattern.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007625212099
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A Splice Variant of the Transcript for Guanylyl Cyclase C Is Expressed in Human Colon and Colorectal Cancer Cells (2000)
    Springer
    Digestive diseases and sciences 45 (2000), S. 298-305 
    Details
    ISSN: 1573-2568
    Keywords: guanylyl cyclase C ; receptor transcript splice variant ; alternate 5" ; splice acceptor sites ; colorectal cancer ; tumor marker
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Guanylyl cyclase C is a sensitive and specific biomarker for metastatic colorectal cancer. A variant of the guanylyl cyclase C transcript was identified that possesses a 142-bp deletion at the 3" end of exon 1 reflecting alternative splicing of mRNA, introducing a shift in the open reading frame that prevents translation of a guanylyl cyclase C-related product. This variant was identified in human intestine and colon carcinomas, but not in extraintestinal tissues or tumors. These studies demonstrate that GCC and the splice variant contribute to the pool of GCC transcripts detected by RT-PCR in human tissues. They indicate that primers for RT-PCR that amplify regions downstream from the deletion are required to assess the full complement of GCC transcripts (GCC + GCCvar) in human tissues and body fluids for staging and postoperative surveillance of patients with colorectal cancer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005456408768
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...