The family Caristiidae, commonly known as manefishes or veilfins, includes seven species of mesopelagic, oceanic fishes found throughout the major ocean basins of the world. We present a partial revision of the family, including all of the ‘‘small mouth’’ species, which are distinguished from other species of the family by having an upper jaw that extends approximately to midorbit and is almost...

The aim of this study rests on three premises: (i) humans are altering ecosystems worldwide, (ii) environmental variation often influences the strength and nature of sexual selection, and (iii) sexual selection is largely responsible for rapid and divergent evolution of male genitalia. While each of these assertions has strong empirical support, no study has yet investigated their logical concl...

The extant Cyprinodontiformes (killifishes) with their two suborders Cyprinodontoidei and Aplocheiloidei represent a diverse and well-studied group of fishes. However, their fossil record is comparatively sparse and has so far yielded members of the Cyprinodontoidei only. Here we report on cyprinodontiform fossils from the upper Miocene Lukeino Formation in the Tugen Hills of the Central Rift V...

TheRussian sturgeon,Acipensergueldenstaedtii, is closely related to three other sturgeon species (A. persicus, A. naccarii and A. baerii), with populations in the Caspian Sea containing a cryptic lineage with an A. baerii-like mtDNA profile. Using morphological evidence (morphometrics, meristics) and additional genetic analysis (cytochrome b gene and control region sequencing), cryptic lineages...

An oreosomatid of the genus Allocyttus McCulloch, 1914 is fished commercially on Emperor Seamounts. However, species’ identity uncertain, as taxonomy species seas around Japan, where names verrucosus Gilchrist, 1906 (type locality: off South Africa) and A. folletti Myers, 1960 California) have both been used. From its anticipated susceptibility to over-exploitation, it urgent establish correct ...

Capelin (Mallotus villosus) is a commercially exploited, key forage-fish species found in the boreal waters of the North Pacific and North Atlantic Oceans. We examined the population structure of capelin throughout their range in the Canadian northwest Atlantic Ocean using genetic-based methods. Capelin collected at ten beach and five demersal spawning locations over the period 2002 through 200...

The population structure of the bluefish, Pomatomus saltatrix (Linnaeus, 1766), in Turkish waters is scarcely described literature. To identify any distinct units and reaffirm findings a previous study, four areas were selected: Aegean Sea, western Black eastern Sea Marmara. In this truss network morphometrics, meristics, otolith shape analyses successfully applied for different identification ...

Samples collected from power station intake screens between 1972 and 1977 have been used to study aspects of the biology of the whiting in the Severn Estuary and Bristol Channel. 0+ whiting generally started appearing in the inner estuary in July, at which time their standard length was at least 38 mm. Their numbers peaked in October and subsequently declined particularly rapidly during the wet...