Many hybrid Wsh lineages result from intrageneric crosses and are often asexual, being considered as “evolutionary dead-ends” (Vrijenhoek, 1998). This seems not to be true in the Squalius alburnoides (Iberian minnow) Steindachner 1866 complex. This complex, that seems to have originated in a cross between distant species, has a remarkable variability in ploidy level and genomic composition, inc...

This study was carried out in the inland waters of Muğla Basin between 2018-2019. As a result field studies and literature, it determined that there were 36 species fish belonging to 17 families (Anguillidae, Atherinidae, Cobitidae, Leuciscidae, Cyprinidae, Gobionidae, Nemacheilidae, Aphaniidae, Poeciliidae, Blenniidae, Centrarchidae, Cichlidae, Gobiidae, Moronidae, Mugilidae, Salmonidae, Silur...

Finlets are small non-retractable fins located on the dorsal and ventral margins of the body between the second dorsal and anal fins and the tail of scombrid fishes. The morphology of the finlets, and finlet kinematics during swimming in a flow tank at speeds of 0.8-3. 0 fork lengths s(-1), were examined in the chub mackerel Scomber japonicus. Functionally, S. japonicus has five dorsal and anal...

This study describes at ultrastructural level the germ cells in the testis of matrinxã (Brycon cephalus) raised in captivity. The specimens 'matrinxã' were maintained in four breeding tanks of 200 m(2), at the Aquaculture Research Center at Vale do Ribeira-CEPAR, from Fishery Institute, in Pariquera-Açu City, São Paulo, Brazil. The samples were collected from March 1994 to February 1996. The te...

Aim of study: To describe the common behaviour flathead grey mullet (Mugil cephalus) under rearing conditions.
 Area Tepic, Mexico.
 Material and methods: Behaviours exhibited by mullets were videorecorded with submersible cameras installed inside three tanks. A total 690 min per day (07:30 - 18:30 h) recorded tank during a week. Afterwards, different behaviours juvenile M. cephalus d...

Egypt has several beaches, as well the Nile River and a few lakes; therefore, it could compensate for lack of protein in red meat with fish. Fish, however, may become source heavy metal exposure humans. The current study was to assess level five toxic metals, lead (Pb), cadmium (Cd), mercury (Hg), arsenic (As), aluminum (Al), six species, namely, Oreochromis niloticus ( O. ) , Mugil cephalus M....