We describe the effect of gelatinous plankton – Aurelia aurita and invaders Mnemiopsis leidyi and Beroe ovata – on fish (eggs, larvae, feeding, and stocks) in the Black Sea and Sea of Azov, based on field data and the relevant literature. Representatives of three ecological groups of fish were chosen as examples: planktivorous anchovy typical of warm-water conditions, planktivorous sprat of tem...

The management of invasive Blue Catfish Ictalurus furcatus in Chesapeake Bay tributaries is hindered by the lack information on its reproductive biology, which a key component population models used to forecast abundance. We quantified and compared traits female from two populations tidal reaches James York River subestuaries during 2015–2017. In these systems, matured between ages 6 10 years s...

Little information exists on diet and prostate cancer progression. We examined the association between intakes of total red meat, processed and unprocessed red meat, poultry, fish, and eggs and prostate cancer recurrence. We conducted a prospective study of 971 men treated with radical prostatectomy for prostate cancer between 2003 and 2010. Men completed a food frequency questionnaire at diagn...

Spawned unfertilized eggs have been found to die by apoptosis in several species with external fertilization. However, there is no necessity for the externally laid eggs to degrade via this process, as apoptosis evolved as a mechanism to reduce the damaging effects of individual cell death on the whole organism. The recent observation of egg degradation in the genital tracts of some oviparous s...

Infection of virus (such as nodavirus and iridovirus) and bacteria (such as Vibrio anguillarum) in farmed grouper has been widely reported and caused large economic losses to Taiwanese fish aquaculture industry since 1979. The multiplex assay was used to detect dual viral infection and showed that only nervous necrosis virus (NNV) can be detected till the end of experiments (100% mortality) onc...

Background: Fluoxetine (ProzacTM) is one of the most popular antidepressant that can be released to aquatic systems via sewage-treatment effluents. It is suspected to provoke substantial effects in the aquatic environment. Methods: In spawning tanks, specimens were exposed to concentrations of 0 and 0.54 µgl-1 fluoxetine from male introduction until the larvae had hatched. Prior to spawning, n...

In the present research, modification of the zona radiata (ZR) around the molly (Poecilia sphenops, Valencinnes 1846) and bighead carp (Hypophthalmichthys nobilis, Richardson 1845) oocytes and in the zygotes were studied for pre- and post-fertilization stages and its relationship with the reproductive strategy. Light and scanning electron microscopic studies on the histological sections of...

The passive bioacoustic technique has the principle of operation is to use underwater sound recording equipment, collecting signals emitted by fish during spawning season, analyze software, through which it possible identify identified species name, population size, and location broodstock in study area. In this study, we used a combination method analyzing density eggs larvae croaker Tien Yen ...

Loss of genetic diversity and accumulation deleterious mutations may lead to inbreeding depression in captive breeding. To address the problem maintaining diversity, we developed a new fish spawning method which offers flexibility crossing diverse species when vitro fertilisation (IVF) is not available. This involves collection sperm from several males ovuliparous fish; mix then injected by cat...

Studies of dietary preferences migratory species are great importance as these connect food webs habitats across the migration route and thus represent trophic relationships between spatially disjointed communities. Here we described threespine stickleback G. aculeatus in White Sea during spawning season using stable isotope stomach content analyses. The two analyses suggested that season, when...