Survey of the pelagic fisheries of the world Part II: The Biology of Pelagic Fishes

The herrings and anchovies: Both in numbers and in economic value the fishes belonging to the family Clupeidae rank first among the food fishes of the world. They are represented in all temperate and tropical seas and often form large shoals swimming on the surface and performing long migratory journeys

Time and Duration of the Spawning Season in some marine teleosts in relation to their distribution.

A part of a study of the biology of the common shore fishes Blennius pholis and Centronotus gunnellus, the times and durations of the breeding seasons were determined and the cycles of maturation and depletion of the gonads were followed throughout the year. It then appeared that the breeding cycles of thc two species are very differen

Published work on freshwater science from the FBA, IFE and CEH, 1929-2006

A new listing of published scientific contributions from the Freshwater Biological Association (FBA) and its later Research Council associates – the Institute of Freshwater Ecology (1989–2000) and the Centre for Ecology and Hydrology (2000+) is provided. The period 1929–2006 is covered. The compilation extends an earlier list assembled by in 1979

Catálogo nacional de los moluscos marinos de las aguas españolas

A checklist of marine Mollusca recorded in Spanish jurisdictional waters is presented, based on a thorough literature search and a limited input of recent field work. The list is detailed according to the five demarcations of the Marine Strategy Framework Directive (NOR, Spanish north coast; SUR, Spanish coast of the Gulf of Cádiz; ESAL, Strait of Gibraltar and Alboran Sea; LEBA, East coast of Spain and Balearic Islands; CAN, the Canary Islands). The list differentiates coastal species living from the supralittoral zone to the shelf break, deep-sea benthic or demersal species, and holoplanktonic species, and also distinguishes between non-indigenous species and species endemic to a particular demarcation. A total of 2466 marine Mollusca species have been reported from Spanish waters, of which 1126 are recorded only from waters surrounding the Iberian Peninsula, 498 are recorded from the Canaries only, and 842 are shared. That total number represents around 5.5% of the global marine molluscan richness. Shore and shelf species are the most numerous (1837), followed by deep-sea benthic species (490) and pelagic species (139), but the contribution of the deep-sea species is most noteworthy in NOR. All eight molluscan classes were represented, but solenogastres and scaphopods were notably more represented than usual in NOR. Species richness in SUR and ESAL was higher than would be expected from their areas, supporting the claim that Andalusian waters have an exceptionally diverse molluscan fauna. Thirteen species collected from INDEMARES cruises are here reported for the first time in Spanish waters. The species recorded in Spanish seas represent more than half of the 4340 species of Mollusca recorded within the scope of the European Register of Marine Species, making this the highest species count in European seas. The Canary Islands demarcation holds by far the largest number of endemic species (127), but special mention is needed regarding the ca. 20 species endemic to the Strait of Gibraltar, a highly anomalous chorotype in the marine realm. The number of non-indigenous species (38) is surprisingly low compared with that of species known in the Mediterranean Sea, amounting to hardly 1.5% of the total and supporting the view that a high number of native species tends to reduce invasion success. The list is seen as a much needed tool for the identification of priority areas for biodiversity conservation, but requires permanent attention and curating in order to remain up-to-date.Se presenta el catálogo actualizado de los moluscos marinos citados en las aguas jurisdiccionales españolas, basado en una exhaustiva revisión bibliográfica y en los hallazgos de campañas recientes. La lista se detalla para las cinco demarcaciones de la Directiva Marco sobre la Estrategia Marina (NOR: costas del norte de España; SUR: costas españolas del golfo de Cádiz, ESAL: estrecho de Gibraltar y mar de Alborán; LEBA: costas del este de España e islas Baleares; CAN: islas Canarias). En la lista se diferencia entre las especies costeras (las que viven desde la zona supralitoral hasta el borde de la plataforma continental), las especies bentónicas o demersales de aguas profundas y las especies holoplanctónicas, y también se indican las especies alóctonas y las que son endémicas para cada una de las demarcaciones. En total, se han citado 2.466 especies de moluscos marinos en aguas españolas, de las cuales 1.126 se conocen sólo en aguas peninsulares y baleares, 498 sólo en aguas canarias, mientras que 842 comparten ambas áreas. Ese número total representa alrededor del 5,5% de la riqueza específica global de moluscos marinos. Las especies costeras y de la plataforma continental son las más numerosas (1.837), seguidas de las especies de aguas profundas (490) y pelágicas (139), pero la contribución de las especies profundas es especialmente notable en NOR. Están representadas las ocho clases que comprende el filo Mollusca, con una destacable representación de los solenogastros y escafópodos en NOR. La riqueza de especies en SUR y ESAL es superior a la que cabría esperar de sus respectivas áreas, lo que apoya la afirmación de que las costas y aguas andaluzas albergan una malacofauna especialmente diversa. Trece especies recogidas en campañas del proyecto INDEMARES se citan aquí por primera vez en aguas españolas. Las especies registradas en los mares españoles suponen más de la mitad de las 4.340 especies de moluscos registradas en el ámbito geográfico del Registro Europeo de Especies Marinas, lo que supone el mayor número de especies de los países europeos. La demarcación de las islas Canarias es la que contiene con diferencia el mayor número de endemismos (127), pero merecen una mención especial las cerca de 20 especies endémicas del área del estrecho de Gibraltar, un corotipo muy anómalo en el medio marino. El número de especies alóctonas (38) es sorprendentemente bajo si lo comparamos con el número de especies que se consideran introducidas en el mar Mediterráneo, y representa apenas un 1,5 % del total, lo que apoya la idea de que un alto número de especies nativas tiende a reducir el éxito de las invasiones. La lista de especies que aquí se presenta constituye una herramienta muy necesaria para la identificación de áreas prioritarias de conservación de la biodiversidad, pero requiere una constante atención y actualización

The history of the Journal of the Marine Biological Association of the United Kingdom and the influence of the publication on marine research

The origin and development of the Journal of the Marine Biological Association of the United Kingdom is described on the occasion of the publication of the 100th volume. Papers in the Journal demonstrate how the techniques and approaches to the study of the marine environment have evolved over the 120 years of publication. The early papers provided a baseline description of the marine environment and of marine communities that allowed the effects of later perturbations of the environment to be determined. Both the early papers and the long time series of records have proved to be particularly relevant as marine scientists try to predict the long-term results of climatic and anthropogenic effects on the marine ecosystem. The Journal has now become increasingly international, with most papers coming from outside Europe

The biology of certain fishes around the south west of England: a. rays & skates (Raiidae); b. mackeral (Scomber scombrus L)

I. Rays and Skates of Devon and Cornwall. Methods of Rapid Identification on the Fishmarket • II. Idem. A Study of the Fishery, with Notes on the Occurrence, Migrations and Habits of the Species • III. Idem. The Proportions of the Sexes in Nature and in Commercial Landings and their Significance to the Fishery • IV. Growth of Claspers and Cloaca in Raia clavata L. • V. Migrations and Growth of the Thornback Ray, Raia clavata L. • VI. Reprinted front the Journal of the Marine Biological Association of the United Kingdom, Vol. xxvii, November 1948, pages 517 -539 CONTRIBUTIONS TO THE BIOLOGY OF THE MACKEREL, SCOMBER SCOMBRUS L.: MACKEREL MIGRATIONS IN THE ENGLISH CHANNEL AND CELTIC SEA. By G. A. Steven • VII. Reprinted from the Journal of the Marine Biological Association of the United Kingdom, Vol. xxviii, December 1949, pages 555 -581 I.CONTRIBUTIONS TO THE BIOLOGY OF THE MACKEREL SCOMBER SCOMBRUS L. II. A STUDY OF THE FISHERY IN THE SOUTHWEST OF ENGLAND, WITH SPECIAL REFERENCE TO SPAWNING, FEEDING, AND `FISHERMEN'S SIGNS'. By G. A. Steven • VIII. Reprinted from the ,journal of the Marine Biological Association of the United Kingdom, Vol. xxx, February 1952, pages 549 -568 CONTRIBUTIONS TO THE BIOLOGY OF THE MACKEREL, SCOMBER SCOMBRUS L. III. AGE AND GROWTH By G. A. Steve

Research Reference Document 81/15 : A Bibliography of Literature Pertaining to the Planktonic Ecosystem in the Gulf of Mane and Nearby Waters, Including Life Histories and Ecology of Certain Important Species (Revised and Expanded to September 1981)

https://digitalmaine.com/dmr_research_reference_documents/1018/thumbnail.jp

Bathymetric distribution of macroinvertebrates in the Northeastern Levantine Sea and the Northeastern Aegean Sea based on bottom-trawl surveys

The objective of this study was to compare the distribution patterns of macroinvertebrate species between the Northeastern Levantine Sea and the Northeastern Aegean Sea. A total of 157 hauls were carried out by commercial trawlers at depths ranging from 30 to 410 m in both areas. The result of SIMPER analysis shows clear differences between the two surveyed areas except for the 300-410 m depth range. Ninety five species were found in the Northeastern Aegean Sea and 100 species in the Northeastern Levantine Sea. Of these species, Pyrosoma atlanticum is newly reported for the Turkish coast. Forty three species were common to both areas.The objective of this study was to compare the distribution patterns of macroinvertebrate species between the Northeastern Levantine Sea and the Northeastern Aegean Sea. A total of 157 hauls were carried out by commercial trawlers at depths ranging from 30 to 410 m in both areas. The result of SIMPER analysis shows clear differences between the two surveyed areas except for the 300-410 m depth range. Ninety five species were found in the Northeastern Aegean Sea and 100 species in the Northeastern Levantine Sea. Of these species, Pyrosoma atlanticum is newly reported for the Turkish coast. Forty three species were common to both areas

Malacofauna del Banco Chella y alrededores (Mediterráneo occidental)

Molluscs of Chella Bank and its surroundings were studied from 21 samples collected with a van Veen grab in the depth range 95-729 m. A total of 299 taxa were identified (77 live-taken), thus increasing by more than 95% the species of molluscs reported in the recently declared site of community importance “Sur de Almería-Seco de los Olivos”. Two of the species are new records to Spanish waters and one to the Alboran Sea. The high species richness observed could be related to the location, the hydrological characteristics and the topographical heterogeneity of the area within the Alboran Sea. Four significant groups of samples were discriminated through multivariate analysis of quantitative data of live-taken molluscs: (I) bathyal muddy bottoms with buried rhodoliths; (II) bathyal muddy bottoms with coral rubble; (III) bathyal hemipelagic muddy bottoms and (IV) bathyal sandy bottoms. Molluscs were more diverse on coral framework bottoms than on sedimentary bottoms around Chella Bank. Most of the live-taken species are widely distributed along the Atlantic and Mediterranean Sea, and a few are strictly Mediterranean. The most striking feature was the occurrence of two species with planktotrophic larval development for which Chella Bank is the sole recorded locality in the Mediterranean (Episcomitra angelesae and Mitrella templadoi) and which elsewhere extremely rare (Mathilda spp.).Se estudiaron los moluscos del banco Chella y sus fondos adyacentes a partir de veintiuna muestras cogidas con draga Van Veen entre 95 y 729 m de profundidad. Un total de 299 taxones fueron identificados (77 vivos), incrementando en un 95% el total de moluscos citados en el reciente Lugar de Importancia Comunitaria “Sur de Almería-Seco de los Olivos”. Dos especies son nuevas citas para aguas españolas y una para el mar de Alborán. La elevada riqueza específica puede estar relacionada con la localización, las características hidrológicas y la heterogeneidad topográfica de esta zona situada dentro del mar de Alborán. Mediante análisis multivariantes usando datos cuantitativos de la taxocenosis se han diferenciado cuatro grupos de muestras: (I) fangos del batiales con rodolitos enterrados, (II) fangos batiales con restos de corales, (III) fangos hemipelágicos batiales, y (IV) arenas batiales. La mayor diversidad se encontró en los fondos con restos de corales, a diferencia de los fondos sedimentarios situados alrededor del banco Chella. La mayoría de las especies vivas están ampliamente distribuidas por el Atlántico y el Mediterráneo, y muy pocas son estrictamente mediterráneas. Cabe destacar la ocurrencia de algunas especies con desarrollo planctotrófico (Episcomitra angelesae, Mitrella templadoi) en el banco Chella como única localidad registrada en el Mediterráneo o especies extremadamente raras en otros lugares (Mathilda spp.)