Wild shellfish reefs have been decimated in many parts of the world over last century, diminishing their vital ecological roles as habitat generators and ecosystem services they provide, such water filtration. Over this same timescale, aquaculture has rapidly expanded to become an impressive global industry with annual worldwide production worth US$35.4 billion 2020. Both wild operations typica...

Highlight Research The dose, duration of immersion, and time interval immersion the estradiol-17β affect rate cannibalism increase seed survival Asian redtail catfish in low treatment this research. Over optimum increased incidence at decrease growth performance. Treatment estradiol-17β, give ability to live on high density has an effect concentration plasma body testosterone cortisol Abstract ...

Few studies investigated whether rapid range expansion is associated with an individual's short-term fitness costs due to an increased risk of inbred mating at the front of expansion. In mating systems with low male mating rates both sexes share potential inbreeding costs and general mechanisms to avoid or reduce these costs are expected. The spider Argiope bruennichi expanded its range recentl...

Resource availability influences sexual selection within populations and determines whether behaviours such as territoriality or resource sharing are adaptive. In Thoropa taophora, a frog endemic to the Atlantic Coastal Rainforest of Brazil, males compete for and defend limited breeding sites while females often share breeding sites with other females; however, sharing breeding sites may involv...

Animal communication theory holds that in order to be evolutionarily stable, signals must be honest on average, but significant dishonesty (i.e. deception) by a subset of the population may also evolve. A typical praying mantid mating system involves active mate searching by males, which is guided by airborne sex pheromones in most species for which mate-searching cues have been studied. The Fe...

The abundance of sperm relative to eggs selects for males that maximize their number of mates and for females that choose high quality males. However, in many species, males exercise mate choice, even when they invest little in their offspring. Sexual cannibalism may promote male choosiness by limiting the number of females a male can inseminate and by biasing the sex ratio toward females becau...