Condition indices are key predictors of health and fitness in wild fish populations. Variation body condition, therefore, can be used to identify stressful conditions that may impact endangered species, such as California’s endemic Delta Smelt (Hypomesus transpacificus McAllister, 1963). Here, we examined spatiotemporal variation the condition > 1600 collected over nine years (2011–2019), a per...

Determining the genetic diversity and differentiation among populations is a critical element of conservation biology, but for many aquatic, data-deficient species with small population sizes, this not possible. Closely related may therefore provide model. For first time, using over 4000 single-nucleotide polymorphism loci, we characterise structure one world’s rarest marine fish, spotted handf...

1 Introduction Fisheries managers have used rotenone for over 100 years (Solman 1950, Kiser et al. 1963). The product rote-none is derived from the natural toxic properties from the roots of several different derris plant species that are located in tropical regions (Ling 2002). The toxins work by blocking mitochondrial electron transport at the cellular level (Singer and Ramsay 1994). These pr...

For conservation and successful stock enhancement of endangered species, an understanding of the movement patterns and behavior of the target species is indispensable. The Mekong giant catfish, Pangasianodon gigas, is endemic to the Mekong Basin and now is threatened with extinction. Although biotelemetry using acoustic transmitters and receivers is expected to reveal its movement patterns and ...