AGRIS (FAO)

Aquatic Sciences and Fisheries Abstracts (ASFA - FAO)

BIOSIS Previews

CAB Abstracts

Aquaculture Compendium - CABI

CiteFactor

CrossRef

EBSCO

Electronic Resources from Smithsonian Institution Libraries (USA)

Google Acadêmico (Google Scholar) 

Index Copernicus International

ISI Web of Knowledge

Journals for Free

Library.ru

Open Science Directory

Papergoing

Portal de Periódicos CAPES (Brasil)

ReseachGate

ROAD - Diretory of Open Accesss Scholary Resources

Science Citation Index Expanded

SCOPUS

Sherpa/Romeo

Sistema Regional de Información en Línea para Revistas Científicas de América Latina (Latindex)

SJIfactor

Sumários de Revistas Brasileiras (Sumarios.org)

Zoological Record