Four species of pelagic fish of particular management concern in the upper San Francisco Estuary, California, USA, have declined precipitously since ca. 2002: delta smelt (Hypomesus transpacificus), longfin smelt (Spirinchus thaleichthys), striped bass (Morone saxatilis), and threadfin shad (Dorosoma petenense). The estuary has been monitored since the late 1960s with extensive collection of da...

Dumps of a mining-metallurgical complex of post-Soviet Republics have accumulated a huge amount of technogenic waste products. Out of them, Kazakhstan alone has preserved about 20 billion tons. In the field of technogenic waste treatment, there is still no technical solution that leads it to be a profitable process. Recent global trends prompted scientists to focus on developing energy-saving a...

This paper is the first report on occurrence of Atherina boyeri in this region. A total 103 individuals A. were caught with fyke-nets (mesh size: 5 mm, polyamide) May and June 2022. The length weight sampled fish ranged from 6.52 to 8.57 cm 1.44 3.46 g, respectively. exponent b length/weight ratio was calculated as 3.091 indicating that species presented an isometric growth. mean value relative...

Tunas are among the most exploited top predators worldwide, with negative impacts on some of their stocks. Changes in population abundance can impact marine food-webs and have potential to alter entire ecosystems. To better understand exploitation tuna stocks critical habitats, basic knowledge diet these species each region is required. Here, we describe two fished archipelago Madeira, Bigeye T...

Thallium is a highly toxic element and very rarely studied in the context of environmental hazards connected with zinc and non-ferrous metal industry. Microorganisms naturally existing in post-flotation and smelt wastes can participate in thallium release from waste deposits and can contribute to its dispersion in the environment. Twenty-one isolates were obtained from wastes of a non-ferrous s...

We examined trends in abundance of four pelagic fish species (delta smelt, longfin smelt, striped bass, and threadfin shad) in the upper San Francisco Estuary, California, USA, over 40 years using Bayesian change point models. Change point models identify times of abrupt or unusual changes in absolute abundance (step changes) or in rates of change in abundance (trend changes). We coupled Bayesi...

Rainbow smelt accumulate high amounts of glycerol in winter. In smelt, there is a predictable profile of plasma glycerol levels that starts to increase in November (<5 μmol/ml), peaks in mid-February (>200 μmol/ml), and thereafter decreases to reach the initial levels in the beginning of May. The aim of this study was to investigate the respective role of the two main mechanisms that might be i...

A kraft paper mill produces a steady waste stream of reacted inorganic chemicals and organic wastes called black liquor. Both monetary and environmental concerns demand that the inorganic chemicals and the organic byproducts are recycled. Currently recovery boilers are the standard means to recycle the inorganic chemicals and organic waste to produce a large fraction of the energy needed to ope...

JOURNAL OF BIOLOGICAL RHYTHMS, Vol. 22 No. 6, December 2007 558-561 DOI: 10.1177/0748730407308285 © 2007 Sage Publications Melanopsin (Opn4) contributes to the entrainment of circadian rhythms in mammals. In rats, retinal ganglion cells expressing Opn4 sense light and regulate circadian entrainment (Hattar et al., 2002) by relaying light information to the SCN via release of neuropeptides, incl...