Fishes

Teleost Fishes

The ulstrastructure of the saccular and lagenar maculae were studied in 15 species of teleost fishes, using the scanning electron microscope. Particular attention was paid to hair cell orientation patterns, composition of the ciliary bundles on the hair cells, hair cell distributions, and supporting cell types. The hair cells on both otolithic organs are divided into several groups with all of ...

Darwin’s fishes: phylogeography of Galápagos Islands reef fishes

—Working in the Galápagos Islands and surrounding areas, we examined the relationship between population structure, a precursor to allopatric speciation, in species of reef fishes that exhibit different life history traits and three types of distributions in a nested setting: endemic (restricted to the Galápagos Islands), insular (Galápagos and neighboring islands), and Panamic (tropical easter...

Columnaris Disease of Fishes

Speciation in fishes.

The field of speciation has seen much renewed interest in the past few years, with theoretical and empirical advances that have moved it from a descriptive field to a predictive and testable one. The goal of this review is to provide a general background on research on speciation as it pertains to fishes. Three major components to the question are first discussed: the spatial, ecological and se...

Are fishes good parents?

Parental care is not the rule in fishes. Most species are quite content to abandon their offspring to the vagaries of a world populated by organisms that are fond of eating nutritious little snacks such as eggs and fry. These non-parental fishes may show discrimination as to where the eggs are deposited (covered by gravel in salmon, in thick mats of weeds for some minnows, in open water downstr...