two nuclear microsatellite dna loci along with partial sequences of mitochondrial dna trna pro -d-loop region were analyzed to assess the genetic diversity and population genetic structure of spottybelly greenling ( hexagrammos agrammus ). a total of 85 individuals were investigated from two different locations at the east and the south coasts of korea which are imwonjin (im) and tongyeong (tn)...

Nine polymorphic microsatellite loci were developed and characterized for the temperate reef fish species, Hexagrammos decagrammus (kelp greenling). The number of alleles varied from three to 22 in a sample of 22 individuals from one population. Expected heterozygosities ranged from 0.354 to 0.979. These microsatellites allow us to investigate reproductive success of individuals, alternative ma...

Organochlorines were examined in liver and stable isotopes in muscle of fishes from the western Aleutian Islands, Alaska, in relation to islands or locations affected by military occupation. Pacific cod (Gadus macrocephalus), Pacific halibut (Hippoglossus stenolepis), and rock greenling (Hexagrammos lagocephalus) were collected from nearshore waters at contemporary (decommissioned) and historic...

Growth performance and aggressive behavior are important measures in fish aquaculture. So, from the perspectives of food production welfare, it is always valuable to increase growth rate reduce aggression efficiently. Physical enrichment has been verified be a promising method improve welfare. But there very scarce knowledge about social enrichment, which an category environmental enrichment. I...

Identifying the relationship between fish aggregations and artificial reefs (ARs) is important for optimizing reef structures protecting marine resources subjected to external disturbance. Yet, knowledge remains limited of how distribution affected by shelter availability provided different AR structures. Here, we tested effects two structural attributes on a benthic juvenile (fat greenling, He...

Microspectrophotometry (MSP) revealed that surprisingly for a "fully marine" species, in summer, photoreceptors of the nearshore scorpaeniform fish known as the masked greenling, Hexagrammos octogrammus, contained exclusively, or presumably, porphyropsin with a small admixture of rhodopsin. As a result of this, the lambda(max) of the spectral sensitivity of the photoreceptors were significantly...

As upper-level predatory fishes become overfished, mesopredators rise to become the new 'top' predators of over-exploited marine communities. To gain insight into ensuing mechanisms that might alter indirect species interactions, we examined how behavioural responses to an upper-level predatory fish might differ between mesopredator species with different life histories. In rocky reefs of the n...