Mahi-mahi (Coryphaena hippurus) are photopic predators that rely on vision for predator avoidance and foraging behavior. Research conducted on Mahi-mahi vision has been primarily focused on adults, with limited knowledge of the visual function and eye development in early life-stages. In this study, larval Mahi-mahi were obtained from spawning wild-caught broodstock and exposed to an optomotor response

In this study, we explored the gill mRNA expression ofNa+/K+-ATPase α1 (NKAα1) and Na+/K+/2Cl− cotransporter 1a(NKCC1a) in an amphibious mudskipper species, Periophthalmus waltoniat high salinities of mangrove tidal zones. Fish were exposed to four salinities including 35 (control), 45, 55, and 70 g kg−1. The branchial transcripts of NKAα1 were elevated in fish kept at 55 and 70 g kg−1 salinities with

Sustainable aquaculture of the green guapote Mayaheros beani requires better understanding their physiology and composition. In that context, this research focused on the study of hematology, proximal and fatty acid (FA) composition of wild and farmed green guapote. Results showed no significant differences between wild and farmed fish in red blood cell count (1.77-2.57 ×106 cel µL-1), hemoglobin (11

Amphibians are increasingly challenged with salinization due to factors such as elevated sea level associated with climate change, the use of road salts, and lowering of water tables. Aldosterone is a steroid hormone that is produced by the adrenal cortex and is involved in osmotic regulation and may play an important role in amphibian acclimation to elevated salinity. We studied the effects of salinity

Procambarus clarkii  is a freshwater crayfish native to the southern central United States and northern Mexico. In Brazil, it is only present in natural environment in the state of São Paulo. Nutritional and reproductive markers were quantified and characterized, as well as intermediate metabolism and oxidative balance in females of P. clarkii collected in a natural environment over a seasonal cycle

The use of animal-borne imaging and environmental data collection systems (AVEDs) can provide behavioral and ecological information of animals that many other technologies cannot usually offer. However, many previous AVEDs have been designed for larger sharks, and there is a need for a technology that permits the collection of behavioral and ecological data for small sharks. In this study, we developed

We tested the orientation capabilities during jumping in blackspotted rockskippers (Entomacrodus striatus). Amphibious fish routinely navigate between terrestrial and aquatic habitats and use either spatial mapping or visual cues to determine where to safely jump. We recorded jumping direction during three experiments: training, visual cue disruption, and spatial memory disruption. During the first

Sustainable aquaculture of the green guapote Mayaheros beani requires better understanding their physiology and composition. In that context, this research focused on the study of hematology, proximal and fatty acid (FA) composition of wild and farmed green guapote. Results showed no significant differences between wild and farmed fish in red blood cell count (1.77-2.57 ×106 cel µL-1), hemoglobin (11

Amphibians are increasingly challenged with salinization due to factors such as elevated sea level associated with climate change, the use of road salts, and lowering of water tables. Aldosterone is a steroid hormone that is produced by the adrenal cortex and is involved in osmotic regulation and may play an important role in amphibian acclimation to elevated salinity. We studied the effects of salinity

In this study, we evaluated the behavioural characteristics of the epithelial tissues of sea cucumber (Apostichopus japonicus) subjected to illumination. The behavioural results indicated that the tentacles, tube feet, and spines were sensitive to light with structural changes. Among the three epithelial tissues, the tentacles were the most sensitive with the shortest reaction and recovery times, whereas

The immune response is a complex network composed of various molecules, cells and signaling pathways in crustacean. Cadmium-induced immunosuppression has been widely researched, but its underlying mechanism on crayfish proPO remains to be elucidated. In this study, the relationship between proPO activity in haemolymph and the activation of p38MAPK and Nrf2 in hepatopancreas was evaluated after red

Fiddler crabs are numerically dominant consumers within salt marshes and understanding how their behavior is influenced by human activities can therefore shed light on the health of disturbed marsh communities. We investigated how various levels of human influence in South Carolina salt marshes alter male waving behavior in the sand fiddler crab Leptuca pugilator across 21 marsh sites. We show that

While many intertidal animals exhibit circatidal rhythms, the nature of the underlying endogenous clocks that control these rhythms has been controversial. In this study American horseshoe crabs, Limulus polyphemus, were used to test the circalunidian hypothesis by exposing them to four different tidal regimes. Overall, the results obtained support the circalunidian hypothesis: each of the twice-daily

In many aquatic invertebrates including monogonont rotifers, sex provides genetic variation and dormant stages that allows dispersal in time and space. While the reproductive biology of some solitary monogonont rotifer species is known, little is known concerning mating behaviors in colonial rotifers. Coloniality poses unique challenges to the typical mating behavior of solitary rotifers. For instance

The daily rhythm of PERIOD protein (PER) expression is an integral component of the circadian clock, which is found among a broad range of animal species including fruit flies, marine mollusks and even humans. The use of antibodies directed against PER has provided a helpful tool in the discovery of PER homologues and the labeling of putative pacemaker cells, especially in animals for which an annotated