Dr. Oscar Trujillo U.A.B.C.S.

chondrichthyes gnathostomata sharks fish agnatha tiburones elasmobránquios celacanto actinistia dipnoi needlefishes silversides stargazers blennies convict blennies cichlids mullets gobies sleepers cardinalfishes nurseryfishes toadfishes cusk-eels beryciforms roughies soldierfishes squirrelfishes thread-tails tube-eyes dories beardfishes moon fish opahs lanternfishes blackchins flagfins lizardfishes jellynose fishes lightfishes hatchetfishes bristlemouths dragonfishes marine smelts whitefish salmon trout salamanderfishes galaxiids electric eel knifefishes catfishes african pikes african tetras darters tetra characins beaked sandfishes milkfishes tubeshoulders slickheads sardines anchovies herrings bonytongues mooneyes spiny eels halosaurs bonefishes tarpons ladyfishes tenpounders bowfins sturgeons paddlefishes bichir lungfishes latimeria coelacanths gombessas thornbacks stingrays wedgefishes sawfishes guitarfishes skates —numbfishes narcinidae torpedo electric rays torpedinidae electric rays pristiophorus saw sharks squatinidae angel sharks bramble sharks dogfish sharks ground sharks mackerel sharks carpet sharks bullhead sharks chimaeras jawed vertebrates hagfish taxonomy lamprey fishes demanda bioquímica del oxígeno intrusión salina sobreexplotación nitrógeno fósforo disponibilidad de agua calidad de agua marco teórico esquema presión estado respuesta indicadores ambientales temperatura viento amícticos lagos meromicticos monomícticos régimen fluvial ecosistema fluvial rios agua arroyos bacterias; indicadores ambientales rajiformes machos male reproduc hembra female peces reproduction tiburón reproducción