A compilation of values for the exponential coefficient of natural mortality (M) is given for 175 different stocks of fish distributed in 84 species, hath freshwater and marine, and ranging from polar to tropical waters. Values of Loo(LT, em), W",,(g, fresh weight), K (l/year) and T (ec, mean annual water temperature) were attributed to each value of M, and the 175 sets of values plotted such t...

This communication is the first report of the occurrence of the order Mormonilloida (Mormonilla phasma) in the tropical Southwestern Atlantic Ocean. Female individuals were found in surface waters from the shelf break state of Rio Grande do Norte (Northeastern Brazil) and between depths of 60 and 100 m in the epipelagic layer around the St. Peter and St. Paul Archipelago (equatorial Atlantic). ...

The name Albula nemoptera (Fowler, 1911) is currently applied to the Shafted, or Threadfin, Bonefish (Albuliformes: Albulidae) inhabiting the tropical coastal waters of both the western Atlantic and eastern Pacific. In the present paper I provide a brief review of the taxonomy and nomenclature of A. nemoptera, and argue that the available morphological, biogeographical and molecular evidence su...

     The family blenniidae comprises 58 genera and 406 species according to Eschmeyer and Fong (2018). Members of the family Blenniidae are small, scale-less and very agile fishes, inhabiting inshore, sub-tidal rocky substrata, and rock pools of the inter-tidal zone of tropical and sub-tropical marine waters (Randall, 1995). A few species are also reported from brackish and freshwaters (Hastin...

Recently, two introduced tunicate species Ecteinascidia thurstoni Herdman, 1891 and Clavelina cyclus Tokioka & Nishikawa, 1975 were discovered in the coastal waters of Thailand. E. thurstoni was found in Andaman Sea, the west coast of Thailand while C. cyclus was first recorded in the east coast, upper Gulf of Thailand. From the historical records, E. thurstoni can be found in South Asia, South...

STOCK DEFINITION AND GEOGRAPHIC RANGE Melon-headed whales are found in tropical and warm-temperate waters throughout the world. The distribution of reported sightings suggests that the oceanic habitat of this species is primarily equatorial waters (Perryman et al. 1994). Small numbers have been taken in the tuna purse-seine fishery in the eastern tropical Pacific, and they are occasionally kill...