|
Paralabrax
''Paralabrax'' is a genus of fishes in the family Serranidae. They are known commonly as rock basses.Pondella, D. J., et al. (2003)The phylogeny of ''Paralabrax'' (Perciformes: Serranidae) and allied taxa inferred from partial 16S and 12S mitochondrial ribosomal DNA sequences.''Molecular Phylogenetics and Evolution'' 29, 176-84. The nine species in the genus are native to rocky reef habitat in the eastern Pacific and western Atlantic Oceans, where they are often dominant predators in the ecosystem. They are also commercially important in local fisheries. Biology Like many fish in the family Serranidae, some ''Paralabrax'' species are hermaphrodites, specifically protogynous hermaphrodites, which are female when young and eventually change into males. Others are gonochores, with individuals being either male or female and never changing sex. Gonochores in this genus are thought to be "secondary gonochores", species with ancestors that were hermaphrodites and lost the ability to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paralabrax Auroguttatus
''Paralabrax'' is a genus of fishes in the family Serranidae. They are known commonly as rock basses.Pondella, D. J., et al. (2003)The phylogeny of ''Paralabrax'' (Perciformes: Serranidae) and allied taxa inferred from partial 16S and 12S mitochondrial ribosomal DNA sequences.''Molecular Phylogenetics and Evolution'' 29, 176-84. The nine species in the genus are native to rocky reef habitat in the eastern Pacific and western Atlantic Oceans, where they are often dominant predators in the ecosystem. They are also commercially important in local fisheries. Biology Like many fish in the family Serranidae, some ''Paralabrax'' species are hermaphrodites, specifically protogynous hermaphrodites, which are female when young and eventually change into males. Others are gonochores, with individuals being either male or female and never changing sex. Gonochores in this genus are thought to be "secondary gonochores", species with ancestors that were hermaphrodites and lost the ability to c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paralabrax Albomaculatus
''Paralabrax'' is a genus of fishes in the family Serranidae. They are known commonly as rock basses.Pondella, D. J., et al. (2003)The phylogeny of ''Paralabrax'' (Perciformes: Serranidae) and allied taxa inferred from partial 16S and 12S mitochondrial ribosomal DNA sequences.''Molecular Phylogenetics and Evolution'' 29, 176-84. The nine species in the genus are native to rocky reef habitat in the eastern Pacific and western Atlantic Oceans, where they are often dominant predators in the ecosystem. They are also commercially important in local fisheries. Biology Like many fish in the family Serranidae, some ''Paralabrax'' species are hermaphrodites, specifically protogynous hermaphrodites, which are female when young and eventually change into males. Others are gonochores, with individuals being either male or female and never changing sex. Gonochores in this genus are thought to be "secondary gonochores", species with ancestors that were hermaphrodites and lost the ability to c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kelp Bass
''Paralabrax clathratus'', the kelp bass, bull bass or calico bass, is a species of marine ray-finned fish, a sea bass from the subfamily Serraninae, classified as part of the family Serranidae which includes the groupers and anthias. It is found in the eastern North Pacific Ocean where it is an important species for both recreational and commercial fisheries. Description ''Paralabrax clathratus'' has an elongate, relatively deep, compressed body with a pointed snout and a large mouth. The mouth extends back as far as the centre line of the pupil and the lower mandible protrudes to form part of the snout. There are teeth all over the roof of the mouth. The margins of the preopercle have fine serrations. There is a large spine on the edge of the gill cover. The dorsal fin has 10 spines and 13-14 soft rays, the 3rd and 4th spine are the longest, both being nearly twice the height of the 2nd spine. The anal fin has 3 spines and 7 soft rays. The caudal fin is truncated, although the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paralabrax Clathratus
''Paralabrax clathratus'', the kelp bass, bull bass or calico bass, is a species of marine ray-finned fish, a sea bass from the subfamily Serraninae, classified as part of the family Serranidae which includes the groupers and anthias. It is found in the eastern North Pacific Ocean where it is an important species for both recreational and commercial fisheries. Description ''Paralabrax clathratus'' has an elongate, relatively deep, compressed body with a pointed snout and a large mouth. The mouth extends back as far as the centre line of the pupil and the lower mandible protrudes to form part of the snout. There are teeth all over the roof of the mouth. The margins of the preopercle have fine serrations. There is a large spine on the edge of the gill cover. The dorsal fin has 10 spines and 13-14 soft rays, the 3rd and 4th spine are the longest, both being nearly twice the height of the 2nd spine. The anal fin has 3 spines and 7 soft rays. The caudal fin is truncated, although the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barred Sand Bass
The barred sand bass (''Paralabrax nebulifer'') is a species of fish in the family Serranidae, the sea basses and groupers. It is native to California and Baja California, where it lives in the coastal waters of the eastern Pacific Ocean. Description This species can reach a length of and a weight of . The body is elongated and compressed. It is gray-white in color with dark vertical bars and a whitish belly. It has a large mouth and a slightly protruding lower jaw. Similar species include the spotted sand bass (''P. maculatofasciatus''), which can be distinguished by small spots all along the body. The barred and spotted sand bass have an elongated third dorsal spine, distinguishing them from the similar kelp bass (''P. clathratus''), which has dorsal spines of equal length.California Mar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paralabrax Maculatofasciatus
The spotted bay bass (''Paralabrax maculatofasciatus'') is a species of marine ray-finned fish, a sea bass from the subfamily Serraninae, classified as part of the family Serranidae which includes the groupers and anthias. It is found in the central eastern Pacific Ocean. Description The spotted sand bass has an elongate, compressed body which has a standard length which is 3.0-3.3 times its depth. It has a pointed head with a large mouth. The edges of the preopercle is finely serrated. The dorsal fin has 10 spines, the third spine being greatly elongated, and 13-14 soft rays while the anal fin has 3 spines and 7 soft rays. The caudal fin is rounded or concave. The overall colour of the body is tan with many black, brown and orange spots which meld together to create dark, vertical bars along the posterior of the ventral surface. There is a dark line that runs from the eye to the operculum and there are 6 or 7 in dark lines on the flanks. The anal, caudal, and the soft part of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serranidae
The Serranidae are a large family of fishes belonging to the order Perciformes. The family contains about 450 species in 65 genera, including the sea basses and the groupers (subfamily Epinephelinae). Although many species are small, in some cases less than , the giant grouper (''Epinephelus lanceolatus'') is one of the largest bony fishes in the world, growing to in length and in weight. Representatives of this group live in tropical and subtropical seas worldwide. Characteristics Many serranid species are brightly colored, and many of the larger species are caught commercially for food. They are usually found over reefs, in tropical to subtropical waters along the coasts. Serranids are generally robust in form, with large mouths and small spines on the gill coverings. They typically have several rows of sharp teeth, usually with a pair of particularly large, canine-like teeth projecting from the lower jaw. All serranids are carnivorous. Although some species, especially i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reef
A reef is a ridge or shoal of rock, coral or similar relatively stable material, lying beneath the surface of a natural body of water. Many reefs result from natural, abiotic processes— deposition of sand, wave erosion planing down rock outcrops, etc.—but there are also reefs such as the coral reefs of tropical waters formed by biotic processes dominated by corals and coralline algae, and artificial reefs such as shipwrecks and other anthropogenic underwater structures may occur intentionally or as the result of an accident, and sometimes have a designed role in enhancing the physical complexity of featureless sand bottoms, to attract a more diverse assemblage of organisms. Reefs are often quite near to the surface, but not all definitions require this. Earth's largest coral reef system is the Great Barrier Reef in Australia, at a length of over . Biotic There is a variety of biotic reef types, including oyster reefs and sponge reefs, but the most massive and widely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artisan Fishing
Artisanal fishing (or traditional/subsistence fishing) consists of various small-scale, low-technology, low-capital, fishing practices undertaken by individual fishing households (as opposed to commercial fishing). Many of these households are of coastal or island ethnic groups. These households make short (rarely overnight) fishing trips close to the shore. Their produce is usually not processed and is mainly for local consumption. Artisan fishing uses traditional fishing techniques such as rod and tackle, fishing arrows and harpoons, cast nets, and small (if any) traditional fishing boats. For that reason, socio-economic status of artisanal fishing community has become an interest of the authorities in recent years. Artisan fishing may be undertaken for both commercial and subsistence reasons. It contrasts with large-scale modern commercial fishing practices in that it is often less wasteful and less stressful on fish populations than modern industrial fishing. Target 14.b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonard Jenyns
Leonard Jenyns (25 May 1800 – 1 September 1893) was an English clergyman, author and naturalist. He was forced to take on the name Leonard Blomefield to receive an inheritance. He is chiefly remembered for his detailed phenology observations of the times of year at which events in natural history occurred. Personal life Jenyns was born in 1800 at No. 85 Pall Mall, London, the home of his maternal grandfather. He was the youngest son of George Leonard Jenyns of Bottisham Hall, Cambridgeshire, a magistrate, landowner and a prebendary of Ely Cathedral. His mother Mary (1763–1832) was the daughter of Dr. William Heberden (1710–1801). His father had inherited the Bottisham Hall property on the death of his distant cousin Soame Jenyns (1704–1787). By 1812, Jenyns began to study natural history encouraged by his great uncle. He went to Eton in 1813 where he read, and was inspired by Gilbert White's '' Natural History of Selborne''. In 1817 Jenyns was introduced to Sir Jos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theodore Nicholas Gill
Theodore Nicholas Gill (March 21, 1837 – September 25, 1914) was an American ichthyologist, mammalogist, malacologist and librarian. Career Born and educated in New York City under private tutors, Gill early showed interest in natural history. He was associated with J. Carson Brevoort in the arrangement of the latter's entomological and ichthyological collections before going to Washington D.C. in 1863 to work at the Smithsonian Institution. He catalogued mammals, fishes and mollusks most particularly although maintaining proficiency in other orders of animals. He was librarian at the Smithsonian and also senior assistant to the Library of Congress. He was elected as a member of the American Philosophical Society in 1867. Gill was professor of zoology at George Washington University. He was also a member of the Megatherium Club at the Smithsonian Institution in Washington, D.C. Fellow members frequently mocked him for his vanity. He was president of the American Association f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sister Group
In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and taxon B are sister groups to each other. Taxa A and B, together with any other extant or extinct descendants of their most recent common ancestor (MRCA), form a monophyletic group, the clade AB. Clade AB and taxon C are also sister groups. Taxa A, B, and C, together with all other descendants of their MRCA form the clade ABC. The whole clade ABC is itself a subtree of a larger tree which offers yet more sister group relationships, both among the leaves and among larger, more deeply rooted clades. The tree structure shown connects through its root to the rest of the universal tree of life. In cladistic standards, taxa A, B, and C may represent specimens, species, genera, or any other taxonomic units. If A and B are at the same taxonomic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.png "Click for more on -> Sister Group")