| determinants of host specificity and comments on attachment site specificity of tetraphyllidean cestodes infecting rajid skates from the northwest atlantic. | the objectives of this study were to (1) describe the host range for 6 tetraphyllidean species and quantify their host specificity using 5 specificity indices; (2) determine the role of morphological determinants in the host specificity of tetraphyllideans by comparing villar and bothridial measurements of species examined herein; and (3) determine the role of a physiological component in the host specificity of tetraphyllideans by exposing tetraphyllideans to blood sera from different fish spec ... | 2008 | 18564745 |
| assessing threats to species at risk using stage-structured state-space models: mortality trends in skate populations. | population models are needed to assess the threats to species at risk and to evaluate alternative management actions. data to support modeling is limited for many species at risk, and commonly used approaches generally assume stationary vital rates, a questionable assumption given widespread ecosystem change. we describe a modeling approach that can be applied to time series of length composition data to estimate vital rates and test for changes in these rates. our approach uses stage-structured ... | 2009 | 19688940 |
| reproductive characteristics and population decline of four species of skate (rajidae) off the eastern coast of canada. | four of the most common species of skate (rajidae) were studied off eastern canada to determine if their reproductive characteristics were linked to their population trajectories. the fecundity of the winter skate leucoraja ocellata, the little skate leucoraja erinacea, the thorny skate amblyraja radiata and the smooth skate malacoraja senta averaged between 41 and 56 egg cases per year for each species. for all species but l. ocellata, males matured at larger sizes and at later ages than female ... | 2009 | 20738493 |
| captive breeding of the barndoor skate (dipturus laevis) at the montreal biodome, with comparison notes on two other captive-bred skate species. | in 1997, the montreal biodome obtained five barndoor skates (dipturus laevis) from the waters off boston, massachusetts. six years later, those specimens began reproducing, and the first egg case was collected in november 2003. since then, 73 hatchlings have been born and raised. egg cases were observed year round, and annual fecundity was measured for the first time: one female laid 69 eggs in 2005, 85 in 2006 and 115 in 2007. egg incubation was longer than believed previously, ranging from 342 ... | 2008 | 19360612 |
| the fate of 2-, 3-, and 4-chlorobiphenyl following intravenous administration to the thorny skate (raja radiata) and the winter skate (raja ocellata). | | 1974 | 4208175 |
| complete genome sequence of a rhodococcus species isolated from the winter skate leucoraja ocellata. | we report here a genome sequence for rhodococcus sp. isolate um008 isolated from the renal/interrenal tissue of the winter skate leucoraja ocellata genome sequence analysis suggests that rhodococcus bacteria may act in a novel mutualistic relationship with their elasmobranch host, serving as biocatalysts in the steroidogenic pathway of 1α-hydroxycorticosterone. | 2016 | 27587827 |