INTRODUCTI9N THERE ARE MANY REPO~TS of luminous fishes, all of which, in earlier days, were taken from the deep seas. Luminous organs were found on the sides of the bodies, on the barbels, or on the antennae. In ourward 'appearance these fishes were strangely shaped and feebl y developed, with soft bones and loose muscles, and it was assumed that such 'unusual fishes belonged exclusively to the...

In January 2002, were caught 11 Makaira nigricans Lacepède, 1802 (Istiophoridae) and two Acanthocybium solandri (Cuvier, 1832) (Scombridae) off Cabo Frio municipality, Rio de Janeiro State, Brazil. We collected digenetic trematodes from the stomach of some of these fishes. We studied these trematodes with optical and scanning electron microscopy and identified them as Hirudinella ventricosa (Pa...

Skeletal deformities seriously relegate the biological performance of fish. The frequency of occurrence of different types of meristic variations and skeletal deformities were shown in population of Mahseer fish, Tor putitora, in two main reservoirs; Korang stream, Islamabad and Dhobi Ghat stream, Hassan Abdal. Total of ninety-five fishes were caught randomly, forty-five from the unpolluted Kor...

Cutting-edge DNA methylation-based epigenetic aging techniques were applied to Gulf of Mexico northern red snapper (Lutjanus campechanus; n = 10; 1–26 years old) and grouper (Epinephelus morio; 2–14 old). Bisulfite-converted restriction site-associated sequencing was used identify CpG sites (cytosines followed by guanines) that exhibit age-correlated methylation, species-specific clocks develop...

We tested the importance of in situ microphytobenthos (MPB) and transported material (seagrass, seagrass epiphytic algae,mangroves, saltmarsh succulents and saltmarsh grass in adjacent habitats) as ultimate sources of carbon to fish caught over mudflats. We measured dC values of these 6 autotrophs and 22 fish species in the subtropical waters of Moreton Bay, Queensland, Australia. All fish dC v...

The correlation between ontogenetic changes in the spectral absorption characteristics of retinal photoreceptors and expression of visual pigment opsins was investigated in the black bream, Acanthopagrus butcheri. To establish whether the spectral qualities of environmental light affected the complement of visual pigments during ontogeny, comparisons were made between fishes reared in: (1) broa...

The highly diverse deepwater demersal ichthyofauna of the western Coral Sea was first systematically surveyed in two exploratory voyages in 1985 and 1986, and these fish assemblages have not been investigated at the same level since. Only recently have catch data and specimens, obtained from these first voyages almost 3 decades ago, been rigorously investigated and analysed. Some 393 species of...

The nematode parasites of 16 large-scaled yellowfish, Barbus marequensis, six silverfish, Barbus mattozi, six small-scaled yellowfish, Barbus polylepis, 52 canary kurper, Chetia flaviventris, 11 carp, Cyprinus carpio, 45 Mozambique bream, Oreochromis mossambicus and a single-banded bream, Tilapia sparrmani, caught in the Hartbeespoort Dam, Transvaal, were collected, identified and counted. Cont...