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Trachelobdella Lubrica
''Trachelobdella lubrica'' is a species of marine leech in the family Piscicolidae. It is a parasite of fish and has a worldwide distribution in the equatorial belt. It was first described in 1840 by the German zoologist Adolph Eduard Grube, the type locality being Palermo, Sicily, in the Mediterranean Sea. Description Like other leeches, ''Trachelobdella lubrica'' has a flexible extensible body; when fully stretched it reaches about . The anterior end has a small sucker and is very narrow. The next section, or neck, is about twice as thick as the "head" part, and the body becomes thick and bloated at the posterior end, which is terminated by a large sucker with which it holds onto the substrate. There are no gills, but there are about 14 pairs of vesicles on the sides which pulsate, and may play a part in respiration. The posterior segment is very large and rounded, with three vesicles, 2 lateral and one dorsal. This leech may be brownish-black or grey, but can also be yellowi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adolph Eduard Grube
Adolph Eduard Grube (18 May 1812, Königsberg – 23 June 1880 , Breslau) was a German zoologist. Adolph Eduard Grube, an able worker in many animal groups, was mainly interested in Polychaetes. In 1837 he defended his thesis at the University of Königsberg (then in Prussia). From 1843-1856 he was Professor of Zoology in the Universität Dorpat (then in Livonia) then at the Universität Breslau (now the University of Wrocław). He was one of the early scientific explorers of the Adriatic Sea. Works Partial list *1850. "Die Familien der Anneliden". ''Archiv für Naturgeschichte'' Berlin, 16(1): 249–364 *1866 "Beschreibungen neuer von der Novara-Expedition mitgebrachter Anneliden und einer neuen landplanarie". ''Verhandlungen der kaiserlich-königlichen zoologisch-botanischen Gesellschaft in Wien'' 16: 173–184. *1866 "Eine neue Annelida, zunächst einer nordischen, in der Nähe der Ophelien und Scalibregmen zu stellenden Annelide, Euzonus arcticus". ''Jahresbericht der Schl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Bass
The European bass (''Dicentrarchus labrax'') is a primarily ocean-going fish native to the waters off Europe's western and southern and Africa's northern coasts, though it can also be found in shallow coastal waters and river mouths during the summer months. It is one of only six species in its family, Moronidae, collectively called the temperate basses. It is fished and raised commercially and is considered the most important fish currently cultured in the Mediterranean. In Ireland and the United Kingdom, the popular restaurant fish sold and consumed as sea bass is exclusively the European bass. In North America, it is widely known by one of its Italian names, branzino. European bass are a slow-growing species that take several years to reach adulthood. An adult European seabass usually weighs around . European bass can reach measurements of up to in length and in weight, though the most common size is only about half of that at . Individuals are silvery grey and sometimes a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Larval Ecology
Marine larval ecology is the study of the factors influencing dispersing larvae, which many marine invertebrates and fishes have. Marine animals with a larva typically release many larvae into the water column, where the larvae develop before metamorphosing into adults. Marine larvae can disperse over long distances, although determining the actual distance is challenging, because of their size and the lack of a good tracking method. Knowing dispersal distances is important for managing fisheries, effectively designing marine reserves, and controlling invasive species. Theories on the evolution of a biphasic life history Larval dispersal is one of the most important topics in marine ecology, today. Many marine invertebrates and many fishes have a bi-phasic life cycle with a pelagic larva or pelagic eggs that can be transported over long distances, and a demersal or benthic adult. There are several theories behind why these organisms have evolved this biphasic life history: *Larva ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Embryo
An embryo is an initial stage of development of a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sperm cell. The resulting fusion of these two cells produces a single-celled zygote that undergoes many cell divisions that produce cells known as blastomeres. The blastomeres are arranged as a solid ball that when reaching a certain size, called a morula, takes in fluid to create a cavity called a blastocoel. The structure is then termed a blastula, or a blastocyst in mammals. The mammalian blastocyst hatches before implantating into the endometrial lining of the womb. Once implanted the embryo will continue its development through the next stages of gastrulation, neurulation, and organogenesis. Gastrulation is the formation of the three germ layers that will form all of the different parts of the body. Neurulation forms the nervous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clitellum
The clitellum is a thickened glandular and non-segmented section of the body wall near the head in earthworms and leeches, that secretes a viscid sac in which eggs are stored. It is located near the anterior end of the body, between the fourteenth and seventeenth segments. The number of the segments to where the clitellum begins and the number of segments that make up the clitellum are important for identifying earthworms. In microdrile earthworms, the clitellum has only one layer, resulting in a smaller quantity of eggs than that of the megadrile earthworms, which have larger multi-layered clitellum that have special cells that secrete albumin into the worms' egg sac. The clitellum is part of the reproductive system of clitellates, a subgroup of annelids which contains oligochaetes (earthworms) and hirudineans (leeches). The clitellum is a thick, saddle-like ring found in the epidermis (skin) of the worm, usually with a light-colored pigment. To form a cocoon for its eggs, the cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pupa
A pupa ( la, pupa, "doll"; plural: ''pupae'') is the life stage of some insects undergoing transformation between immature and mature stages. Insects that go through a pupal stage are holometabolous: they go through four distinct stages in their life cycle, the stages thereof being egg, larva, pupa, and imago. The processes of entering and completing the pupal stage are controlled by the insect's hormones, especially juvenile hormone, prothoracicotropic hormone, and ecdysone. The act of becoming a pupa is called pupation, and the act of emerging from the pupal case is called eclosion or emergence. The pupae of different groups of insects have different names such as ''chrysalis'' for the pupae of butterflies and ''tumbler'' for those of the mosquito family. Pupae may further be enclosed in other structures such as cocoons, nests, or shells. Position in life cycle The pupal stage follows the larval stage and precedes adulthood (''imago'') in insects with complete metamorphosi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermaphrodite
In reproductive biology, a hermaphrodite () is an organism that has both kinds of reproductive organs and can produce both gametes associated with male and female sexes. Many Taxonomy (biology), taxonomic groups of animals (mostly invertebrates) do not have separate sexes. In these groups, hermaphroditism is a normal condition, enabling a form of sexual reproduction in which either partner can act as the female or male. For example, the great majority of tunicata, tunicates, pulmonate molluscs, opisthobranch, earthworms, and slugs are hermaphrodites. Hermaphroditism is also found in some fish species and to a lesser degree in other vertebrates. Most plants are also hermaphrodites. Animal species having different sexes, male and female, are called Gonochorism, gonochoric, which is the opposite of hermaphrodite. There are also species where hermaphrodites exist alongside males (called androdioecy) or alongside females (called gynodioecy), or all three exist in the same species ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Atlantic Seabream
Western Atlantic seabream (''Archosargus rhomboidalis'') is an ocean-going species of fish in the family, Sparidae. It was first described in 1758 by the "father of modern taxonomy," Carl Linnaeus, in the 10th edition of his book, ''Systema Naturae''. Within their native range, Western Atlantic seabream are also known as the seabream,Nelson, J.S., E.J. Crossman, H. Espinosa-Pérez, L.T. Findley, C.R. Gilbert, R.N. Lea and J.D. Williams 2004 Common and scientific names of fishes from the United States, Canada, and Mexico. American Fisheries Society, Special Publication 29, Bethesda, Maryland. brim,Zaneveld, J.S. 1983 Caribbean Fish Life. Index to the local and scientific names of the marine fishes and fishlike invertebrates of the Caribbean area (Tropical Western Central Atlantic Ocean) E.J. Brill / Dr. W. Backhuys, Leiden, 163 p. tropical sheepshead, chopa amarilla, or salema. Although they are eaten, and have been described as pan fish, Western Atlantic seabream have not gain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diplodus Vulgaris
''Diplodus vulgaris'', the common two-banded sea bream, is a species of seabream belonging to the family Sparidae. Description ''Diplodus vulgaris'' can reach a length of about with maximum recorded weight of . Body is generally grey-silver, with two well-defined vertical black bands, one close to the gills and one in the rear of the body, just before the base of the caudal fin. Another black stripe, less pronounced, is present near the eyes. There are golden lines along the body, typically on the back. Lips are rather thick. In each jaw, there are 8 narrow, light-brownish incisors. In the western Mediterranean, it reproduces in October and November and in the eastern Mediterranean in December and January. It is a gregarious species, sometimes forming groups composed even by many specimens. In the shallows, it often creates smaller groups even with other similar species. Adults feed on benthic invertebrates, crustaceans, worms and mollusks. It is considered an important food f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nassau Grouper
The Nassau grouper (''Epinephelus striatus'') is one of the large number of perciform fishes in the family Serranidae commonly referred to as groupers. It is the most important of the groupers for commercial fishery in the West Indies, but has been endangered by overfishing. The International Union for Conservation of Nature lists the Nassau grouper as critically endangered, due to commercial and recreational fishing and reef destruction. Fishing the species is prohibited in US federal waters. The Nassau grouper is a US National Marine Fisheries Service]Species of Concernand is a candidate for listing under thEndangered Species Act Description The Nassau grouper is a medium to large fish, growing to over a meter in length and up to 25 kg in weight. It has a thick body and large mouth, which it uses to "inhale" prey. Its color varies depending on an individual fish's circumstances and environment. In shallow water (down to 60 ft), the grouper is a tawny color, but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Hind
The red hind (''Epinephelus guttatus''), also known as the koon or lucky grouper in Caribbean vernacular, is a species of marine ray-finned fish, a grouper from the subfamily Epinephelinae which is part of the family Serranidae, which also includes the anthias and sea basses. It is native to the western Atlantic Ocean where it ranges from the eastern United States to Brazil. It is the most common species of ''Epinephelus'' in the Caribbean. Description The red hind has a robust, compressed body which is deepest at the origin of the dorsal fin, the standard length being 2.7 to 3.1 times the depth. The gill cover has three flat spines on its margin. The preopercle has a finely serrated margin and protrudes slightly near its lower edge. The dorsal fin contains 11 spines and 15-16 soft rays while the anal fin has 3 spines and 8 soft rays. It has a slightly convex tail. This species is greenish grey to light brown on its upper body fading to white on the lower body, with many well-s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Lionfish
The red lionfish (''Pterois volitans'') is a venomous coral reef fish in the family Scorpaenidae, order Scorpaeniformes. It is mainly native to the Indo-Pacific region, but has become an invasive species in the Caribbean Sea, as well as along the East Coast of the United States and East Mediterranean and also found in Brazil at Fernando de Noronha. ''P. volitans'' and a similar relative, '' Pterois miles'', have both been deemed invasive species. Red lionfish are clad in white stripes alternated with red, maroon or brown stripes. Adults in this species can grow as large as 47 cm (18.5 in) in length, making it one of the largest species of lionfish in the ocean, while juveniles are typically shorter than .National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science "Have You Seen Me?" The average red lionfish lives around 10 years.Encyclopedia of Life (EOL). (2011, January 19). Retrieved 4 May 2011 from (http://eol.org) As with many species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
