The distribution of novae across the face of the Large Magellanic Cloud (LMC) is presented. The star formation history of nearby regions around them is also studied using photometric data of stars and star clusters in the OGLE II survey and star cluster catalogues. The nova population in the LMC belong, predominantly, to the fast category, with only 11.8% belonging to the slow nova population. ...

Time series datasets are widely used in many areas. When the size of a dataset grows large or the number of datasets increases, it becomes difficult for a human to observe the structure of a dataset or to understand the underlying relationships. In this report, we present an interactive visualization tool called Fishery View to display and interact with fish population data obtained from the UB...

We present a novel method of decomposing digital binary clumps into constituent convex parts. The algorithm is based on the analysis of concavities to determine where splitting should occur. Two relative concavity measures, concavity degree and concavity weight, are also defined.

Sport-fish introductions are now recognized as an important cause of amphibian decline, but few researchers have quantified the demographic responses of amphibians to current options in fisheries management designed to minimize effects on sensitive amphibians. Demographic analyses with mark-recapture data allow researchers to assess the relative importance of survival, local recruitment, and mi...

To visualize or address complex real world problems, eliciting and mapping of a mental model is reasonable approach but it is far from sufficient by itself. In this article we present a system dynamics model. The purpose of the model is to develop a sustainable model for fish population, growth, and harvesting. The model was run through several important tests to determine its sensitivity to ch...

in this study, age and growth for two populations of shemaya, chalcalburnus chalcoides, in haraz and shirud rivers were investigated from april to june 2006. 704 fish specimens were collected using a cast- net. the maximum length and weight in a 5- year old female observed were 251 mm and 96 gr, respectively. the most abundant age groups were 2+ and 3+ years for male and female respectively. wh...

—There is evidence that actively moving salmonids are of lower condition than the general population, and they are sometimes regarded as inferior to resident fish. However, little information exists on the permanence of this attribute. We used mark–recapture and two-way traps to determine whether there are differences in the condition and growth of mobile and resident Bonneville cutthroat trout...

An improved formulation for the N(H 2)/I(CO) conversion factor or X-factor is proposed. The statement that the velocity-integrated radiation temperature of the 12 CO J = 1 → 0 line, I(12 CO), " counts " optically thick clumps is quantified using the formalism of Martin et al. (1984) for line emission in a clumpy cloud. Adopting the simplifying assumptions of thermalized 12 CO J = 1 → 0 line emi...

Fisheries managers are likely to assess fish populations at some point during the fisheries management process. Managers that follow the fisheries management process (see Chapter 5) might find their knowledge base insufficient during the steps of problem identification or management action and must assess a population before appropriate actions can be taken. Managers will implement some type of...