Javier Cristobo - Academia.edu (original) (raw)

Papers by Javier Cristobo

Estuarine, Coastal and Shelf Science

Macro and megafauna were studied in the Avilés Canyon System (ACS), southern Bay of Biscay (Canta... more Macro and megafauna were studied in the Avilés Canyon System (ACS), southern Bay of Biscay (Cantabrian Sea), during several oceanographic cruises carried out from 2009 to 2017. The biodiversity of ACS is summarized and its description is herein updated after sampling surveys of several programmes (ECOMARG, INDEMARES, SponGES, INTEMARES) conducted by the Spanish Institute of Oceanography (IEO). This study has updated previous knowledge in the canyon area from past national and international projects, their reports and publications as well as data collected in the context of regional projects designed to gain new insight into the diversity of marine invertebrates and fishes from the ACS. Samples were taken using a range of sampling gears (Rock dredge, Beam trawl, Trawl gear GOC-73, Suprabenthic sledge, Box corer and Remoted operated vehicle), from 55 to 2291 m in depth. A total of 1015 species were identified at the ACS: 98 Porifera,

Reteporella taylori n. sp. (FIg. 21; TAbLE 23) Etymology. N... more Reteporella taylori n. sp. (FIg. 21; TAbLE 23) Etymology. NAMED AFTER DR PAUL D. TAYLOR, RENOWNED bRYOZOAN PALEONTOLOgIST, IN APPRECIATION OF HIS CONTRIbUTION DURINg COLLAbORATIVE RESEARCH ON bRYOZOANS. Material examined. HΟlΟtype: CRBA-58260, STN PAT1108DR11 (SAMPLE COATED WITH gOLD), FRAgMENT C. 10 MM LONg, 8 MM WIDE. Paratypes: CRBA-58257, STN PAT0209DR01, COLONY C. 25 MM LONg, 19 MM WIDE, LACKINg DISTAL PORTION, ATTACHED TO ROCK; CRBA-58258, STN PAT0209DR04, FRAgMENT C. 25 MM LONg, 15 MM WIDE, LACKINg DISTAL PORTIONS. Description. COLONY OPEN, SHALLOW CUP, OVERALL SIZE NOT KNOWN. FENESTRAE ELONgATE-OVAL, 2.0–3.0 MM LONg bY 1.0–2.0 MM WIDE; TRAbECULAE CONSISTINg OF TWO TO FIVE LONgITUDINAL, ALTERNATINg AUTOZOOIDAL SERIES. AUTOZOOIDS SEPARATED bY FAINT SUTURES. FRONTAL SHIELD SMOOTH WITH FEW PORES. PRIMARY ORIFICE TRANSVERSELY OVAL, WIDER THAN LONg, DISTAL RIM WITH DENTICULATION; PROXIMAL PERISTOMIAL RIM LOW, WITH A LYRULA ON THE INNER FACE. NO ORAL SPINES PRESENT. AUTOZOOIDS WITH ONE OR MORE ADVENTITIOUS AVICULARIA FRONTALLY, VARIAbLY POSITIONED AND ORIENTATED, MOSTLY OVAL WITH CROSSbAR, LACKINg COLUMELLA, AND AN EXTENSIVE PALATE. MANY AUTOZOOIDS WITH A MASSIVELY ENLARgED AVICULARIUM IMMEDIATELY PROXIMAL TO PERISTOME, WITH AbRUPTLY HOOKED, TRIANgULAR ROSTRUM, ALMOST PERPENDICULAR TO THE FRONTAL PLANE. SOME OF THE ENLARgED AVICULARIA ALSO PRESENT ALONg bRANCH EDgES. OVICELL INCONSPICUOUS, ELONgATE-OVAL WITH A MEDIAN FISSURE. BASAL SURFACE OF COLONY SMOOTH, WITH SUTURES, bEARINg A FEW OVAL AVICULARIA IDENTICAL TO THOSE ON THE FRONTAL SURFACE. Remarks. RetepΟrella taylΟri n. sp. RESEMbLES R. erugata HAYWARD, 1993 AND R. hippΟcrepis (WATERS, 1904) FROM ANTARCTICA IN HAVINg A SMOOTH FRONTAL SHIELD, AUTOZOOIDS SEPARATED bY FAINT SUTURES AND NUMEROUS, DIFFERENT AVICULARIA, INCLUDINg A MASSIVELY ENLARgED TYPE WITH A HOOKED, TRIANgULAR ROSTRUM. THE MOST DISTINCTIVE FEATURE DIFFERENTIATINg IT FROM THESE TWO SPECIES IS THE bROAD PERISTOMIAL LYRU [...]

Smittina acicularis n. sp. (FIg. 7; TAbLE 9) Etymology. LAT... more Smittina acicularis n. sp. (FIg. 7; TAbLE 9) Etymology. LATIN ' acicula ', LITTLE NEEDLE, ALLUDINg TO THE PAIR OF ANgLED NEEDLE-LIKE PIVOTS. Material examined. HΟlΟtype: CRBA-58261, STN PAT0209DR09, COLONY C. 15 MM LONg, 5 MM WIDE, ENCRUSTINg CORAL. Description. COLONY ENCRUSTINg, UNILAMINAR; COLONY SIZE C. 15 MM LONg, 5 MM WIDE. AUTOZOOIDS HEXAgONAL TO RECTANgULAR, THE LATERAL WALL VISIbLE AS THIN RIDgES. FRONTAL WALL DENSELY PERFORATED bY ROUND PORES. PRIMARY ORIFICE WIDER THAN LONg, LYRULA SHORT AND bROAD, WITH STRAIgHT EDgE AND SHARPLY CUSPED CORNERS, OCCUPYINg MOST OF PROXIMAL bORDER OF ORIFICE. NO ORAL SPINES. PERISTOME WELL DEVELOPED AND SUbTUbULAR, WITH ELEVATED SLOPINg SIDES LIKE A bROAD-bASED CONE. AVICULARIUM SITUATED PROXIMAL TO A SMALL PERISTOMIAL PSEUDOSPIRAMEN; ROSTRUM NORMAL TO FRONTAL PLANE, ELONgATE; A PAIR OF ANgLED NEEDLE-LIKE PIVOTS; PALATE ALMOST ENTIRE, WITH A SMALL FORAMEN bELOW THE PIVOTS. OVICELL SLIgHTLY WIDER THAN LONg, CONVEX, PERFORATED bY VARIAbLY SIZED PORES. Remarks. Smittina IS A DIVERSE gENUS WITH A WORLDWIDE DISTRIbUTION bUT, AMONg THE SUbANTARCTIC SPECIES, ONLY A FEW HAVE THE SUbORAL AVICULARIUM SITUATED PROXIMAL TO THE PERISTOME AND WITHOUT A PSEUDOSINUS LIKE THE PRESENT SPECIES. S. lebruni (WATERS, 1905), S. leptΟdentata HAYWARD & THORPE, 1990 AND S. mΟnacha (JULLIEN, 1888) HAVE A PERISTOME WITH A LARgE PROXIMAL FORAMEN AND THE LATTER SPECIES SHOW DIFFERENT TYPES OF SUbORAL AVICULARIA (WITH ROUNDED OR SPATULATE ROSTRUM). S. acicularis n. sp. CLOSELY RESEMbLES Smittina Οblita LóPEZ-GAPPA, 2002, WHICH WAS ALSO RECORDED FROM THE SOUTHWESTERN ATLANTIC bUT IN SHALLOWER WATERS (92–183 M). IT MAY bE DISTINgUISHED FROM IT IN HAVINg A gREATER PSEUDOPORE DENSITY (63–77 PER ZOOID COMPARED TO 35–46), A PROPORTIONATELY SMALLER PSEUDOSPIRAMINAL PORE, A bROADER EXPANSE OF PERISTOMIAL WALL AbOVE THE PSEUDOSPIRAMEN, AND MANDIbULAR PIVOTS INSTEAD OF A COMPLETE CROSSbAR. LóPEZ-GA [...]

Smittoidea granulosa n. sp. (FIg. 8; TAbLE 10) Etymology. L... more Smittoidea granulosa n. sp. (FIg. 8; TAbLE 10) Etymology. LATIN ' granulΟsus ', gRANULAR, ALLUDINg TO THE gRANULAR FRONTAL SHIELD. Material examined. HΟlΟtype: CRBA-58262, STN PAT0209DR12 (SAMPLE COATED WITH gOLD), COLONY C. 10 MM LONg, 8 MM WIDE. Description. COLONY ENCRUSTINg, UNILAMINAR; COLONY SIZE C. 10 MM LONg, 8 MM WIDE. AUTOZOOIDS HEXAgONAL, FLAT. FRONTAL SHIELD FLAT OR CONVEX MEDIALLY, gRANULAR, bORDERED bY RAISED RIDgES, AND 14–17 MARgINAL AREOLAR PORES. PRIMARY ORIFICE WIDER THAN LONg, PROXIMAL EDgE WITH SHORT, bROAD, SLIgHTLY CURVED-EDgED LYRULA, OCCUPYINg PROXIMATELY HALF WIDTH OF ORIFICE; CONDYLES CONSPICUOUS, SHARPLY POINTED, DOWN-CURVED. NO ORAL SPINES. PERISTOME LOW, WITH MEDIO-PROXIMAL NOTCH, SOMETIMES AbOVE A SMALL OVAL SUbORAL AVICULARIUM, WITH SEMI-ELLIPTICAL MANDIbLE, PARALLEL TO FRONTAL PLANE, DIRECTED PROXIMALLY, CROSSbAR SLENDER. OVICELL RECUMbENT ON FRONTAL SHIELD OF DISTALLY SUCCEEDINg AUTOZOOID, HEMISPHERICAL; ECTOOECIUM WITH LARgE, UNCALCIFIED FRONTAL AREA; THE EXPOSED ENDOOECIUM PIERCED bY NUMEROUS, IRREgULAR PORES. Remarks. SmittΟidea granulΟsa n. sp. RESEMbLES S. cancellata HAYWARD & WINSTON, 2011, IN THE OVERALL APPEARANCE, bUT DIFFERS IN HAVINg MUCH LARgER ZOOIDS, gRANULAR FRONTAL SHIELD AND OOECIUM (NOT DIMPLED), MORE NUMEROUS MARgINAL AREOLAR PORES (14–17, MOSTLY 17, COMPARED TO 10–15), AND IN THE AbSENCE OF DIMORPHIC AVICULARIA. n, number of measurements made; SD, standard deviation

Biconcavus batmani n. sp. (FIg. 6; TAbLE 8) Etymology. ALLU... more Biconcavus batmani n. sp. (FIg. 6; TAbLE 8) Etymology. ALLUDINg TO ' Batman ', A FICTIONAL SUPERHERO OF COMIC bOOKS AND MOVIES, ALLUDINg TO THE DISTAL ORAL RIM bEARINg LATERAL STOUT TUbERCLES WHICH RESEMbLE A Batman MASK. Material examined. HΟlΟtype: CRBA-58231, STN PAT0209DR13, COLONY C. 12 MM LONg, 7 MM WIDE, ENCRUSTINg ROCK. Description. COLONY ENCRUSTINg, UNILAMINAR; COLONY SIZE, C. 12 MM LONg, 7 MM WIDTH. AUTOZOOIDS HEXAgONAL TO RECTANgULAR, STRONgLY CONVEX, SEPARATED bY DISTINCT INTERZOOIDAL FURROWS; DISTAL ORAL RIM ELEVATED, bEARINg THREE STOUT TUbERCLES, THE LATERAL ONES THE LARgEST. FRONTAL SHIELD COARSELY gRANULAR, FRONTALLY IMPERFORATE, DENSELY PERFORATED DISTOLATERALLY, WITH SEVERAL ROWS OF SMALL PERFORATIONS WHICH MAY bE PSEUDOPORES (OUTSIDE THE bOUNDARY OF THE UMbONULOID FRONTAL SHIELD) AND /OR MARgINAL AREOLAR PORES. APERTURE SUbqUADRATE, PROXIMAL AND DISTAL bORDERS STRAIgHT, OPERCULUM LATERALLY bICONCAVE. NO ORAL SPINES. AVICULARIA, OVICELLS AND ANCESTRULA NOT SEEN. Remarks. THE FINDINg OF ADDITIONAL MATERIAL MAY SHED LIgHT ON THE FORM OF THE ANCESTRULA AND WHETHER OR NOT AVICULARIA AND OOECIA ARE PRESENT. n, number of measurements made; SD, standard deviation

CBM - Cahiers de Biologie Marine, 2004

Two new species of Poecilosclerida Iophon hesperidesi sp. nov. (Iophonidae) and Isodictya bentart... more Two new species of Poecilosclerida Iophon hesperidesi sp. nov. (Iophonidae) and Isodictya bentarti sp. nov. (Isodictyidae) are described from material collected during the first Spanish expedition on the study of the Antarctic benthos, "Bentart '94". A total of 67 individuals of Poecilosclerida (Demospongiae) were examined, corresponding to 14 species, 9 genera and 8 families. The individuals were collected from 13 stations in muddy sand, mud, stones, rocks, gravel and mixed sediment, at depths of 15 to 396 m. The specimens were collected by scuba diving, Van Veen dredge and rock dredge, on board the "Hespérides".

Frontiers in Marine Science, 2019

Invertebrate Systematics, 2018

Our study reports on the occurrence of a new species of Leucetta (Calcinea, Calcarea) from the So... more Our study reports on the occurrence of a new species of Leucetta (Calcinea, Calcarea) from the Southern Ocean, Leucetta giribeti, sp. nov., collected in the shallow waters (15m depth) of Deception Island, South Shetland Islands. This new taxon is described based on a combination of morphological and molecular data, including the description of oocytes, embryos, larvae and sperm found in the choanosome. While female reproductive elements showed great similarities with those of other calcineans, sperm is reported here for the first time in the whole Calcinea subclass. Sperm cells are flagellated and possess a typical spermatic mid-piece, which is usually observed in cnidarians. In our phylogenetic analyses, we recovered Leucetta giribeti, sp. nov. as sister species of a clade formed by species of the genera Leucetta, Pericharax and Leucettusa. Although the clade in which Leucetta giribeti, sp. nov. is placed is supported by molecular and morphological features, we cannot propose a new...

REDESCRIPTION AND ECOLOGICAL CHARACTERIZATION OF TWO SPECIES OF GENUS HYMEDESMIA (PORIFERA, POECI... more REDESCRIPTION AND ECOLOGICAL CHARACTERIZATION OF TWO SPECIES OF GENUS HYMEDESMIA (PORIFERA, POECILOSCLERIDA) FROM THE GALICIAN COASTS (NW IBERIAN PENINSULA).- This paper redescribes two species, Hymedesmia consanguinea and Hymedesmia paupertas. H. consanguinea is a sponge that has not been cited since 1933 and whose bathymetric distribution was from 45 to 973 m. Hymedesmia paupertas, on the other hand, was described in British waters in 1866 and subsequently cited on several occasions in the Arctic and Mediterranean Sea. Both species were collected by divers, which has allowed us to provide new data on the ecological characterization of their habitats. Figures have been made to illustrate the skeletal arrangement and the spicules have been photographed using the electron scanning microscope. In addition to a description of their form, skeletal arrangement and types of spicules, on which a biometric study has been carried out, there is also morphological-systematic discussion compari...

MALACOLOGICAL FAUNA OF THE ALIMENTATION OF ASTROPECTEN IRREGULARIS (LINCK,1807) (ECHINODERMATA: A... more MALACOLOGICAL FAUNA OF THE ALIMENTATION OF ASTROPECTEN IRREGULARIS (LINCK,1807) (ECHINODERMATA: ASTEROIDEA) IN THE RIA DE ARES (GALICIA, SPAIN) BY GASTRIC CONTENTS ANALYSIS.- The authors realize an analysis of the diet (malacological fauna) of Astropecten irregularis (Linck, 1807), (Echinodermata:Asteroidea) in the Ría de Ares (NW of Iberian Peninsula).

The case study presented here focused on the Avilés Canyon´s system, one of the areas included in... more The case study presented here focused on the Avilés Canyon´s system, one of the areas included in the INDEMARES project "Inventory and designation of marine Natura 2000 areas in the Spanish sea”. Due to the high complexity of this area and the difficulties of surveying it, modelling techniques to optimize the data were necessary to improve the understanding of this ecosystem and therefore develop appropriate conservation and management strategies. This study is based on multidisciplinary surveys carried out in the Avilés Canyon´s system during 2010, 2011 and 2012. The distribution data for the species studied were obtained from otter trawl and beam trawl to sample sedimentary areas and from photogrammetric sled, ROV and rocky dredge in complex and hard substrates. To characterize the benthic terrain multibeam data, high resolution seismic profiles (TOPAS system) and sedimentology data from the box-corer were used. These data produced a representative view of the area which was ...

The complex Aviles Canyons system is located in the western area of the Cantabrian Sea, whose stu... more The complex Aviles Canyons system is located in the western area of the Cantabrian Sea, whose study is currently being carried out by the INDEMARES (LIFE+) project. The aim of this project is to provide the necessary information to establish a network of representative marine protected areas (MPAs) for the purposes of biodiversity conservation on Spanish waters. For the effective design of MPAs several basic questions need to be addressed: what size should the MPA be; what proportion of habitats or species populations should be include; and where should the MPA be sited. In order to answer these questions, one of the main objectives of this project is identifying and charting the habitats and the biological communities that inhabit them. To date, there are different classification systems to define units, including geomorphological features, broad substratum categories and biological communities, for various regions in the world. Within Europe, efforts are currently focused on producing habitats maps of the seafloor and there are several projects in progress trying to define a standard system to provide habitat data in a comparable manner. The most widely accepted system by which habitats are classified is called the European Nature Information System (or EUNIS, Davies et al ., 2004), that is our first option to define the more representative habitats on INDEMARES project study areas. However, this hierarchical classification system is still not well developed for the characteristics of several ecosystems and in general terms presents important discrepancies in their design. Particularly highlights the low development of the classification of the deep-sea habitats and their inconsistencies with hierarchical levels in the sallower waters. In this study we will attempt to determine the suitability of this classification system to the particularities of a complex Aviles Canyon's deep-sea ecosystem, identifying the main problems to be solved in improved versions of the EUNIS to reflect regional peculiarities. As a first step, to recognize the seabed morphology and characterize the processes generating these morphological features, a detailed geomorphologic analysis, based on multibeam bathymetry, parametric seismic profiles, box corer samples and

ABSTRACT Fax: +34 981 229077; Tel: +34981129865. La resolución 61/105 de la Asamblea General de N... more ABSTRACT Fax: +34 981 229077; Tel: +34981129865. La resolución 61/105 de la Asamblea General de Naciones Unidas (AGNU) exhorta a que antes del 31 de diciembre de 2008, los países deben evaluar si la actividad que están realizando sus buques de pesca que, utilizan artes de fondo en aguas internacionales, puede afectar negativamente en los Ecosistemas Marinos Vulnerables (EMV). Por otra parte, la Consulta Técnica sobre las Directrices Internacionales para la Ordenación de las Pesquerías de Aguas Profundas en Alta Mar (FAO, 2008), incide en la necesidad de la identificación de ecosistemas marinos vulnerables y evaluación de los efectos perjudiciales importantes e insiste en que los Estados del pabellón y las Organizaciones Regionales de Ordenación Pesquera (OROP) deberían realizar evaluaciones para establecer si es probable que las actividades pesqueras en aguas profundas produzcan efectos perjudiciales importantes en una determinada zona. El objetivo de la presente ponencia es el de presentar los resultados obtenidos y las principales conclusiones de la serie de campañas realizadas entre noviembre de 2007 y marzo de 2009 por el Grupo ATLANTIS del Instituto Español de Oceanografía a bordo del B/O Miguel Oliver, incluyendo los objetivos alcanzados a través de los trabajos programados de geomorfología, bentos y pesca en el Atlántico Suroccidental en la zona comprendida entre el límite de las Zonas Económicas Exclusivas (ZEEs) y la isobata de los 1500 m de profundidad, un total de 11 campañas de investigación multidisciplinar, resumidas en los siguientes trabajos: • 303 días efectivos de mar y Prospección de una superficie total de 48.615 km 2 • Realización de un total de 89.363 km de perfiles geofísicos • 65 muestreos con draga de roca • 184 muestreos con draga Box-Corer. • 322 estaciones de CTD • 294 lances de pesca • 294 muestras de sedimentos con el colector de red • Realización de miles de fotografías de especies bentónicas, de imágenes digitales de alta resolución y decenas de horas de vídeo realizadas con el ROV del barco. Entre los principales resultados de los trabajos de investigación multidisciplinar hay que destacar la identificación, descripción y delimitación de los EMV, siguiendo criterios biológicos, geológicos y mixtos; la identificación de los principales grupos bentónicos indicadores de EMV; la determinación de los valores que representan una captura significativa de los distintos taxones considerados como vulnerables según criterios de la ONU y OSPAR, y finalmente, la propuesta de áreas marinas que deberían ser consideradas como candidatas a ser protegidas.

Estuarine, Coastal and Shelf Science

CBM - Cahiers de Biologie Marine, 2004

Frontiers in Marine Science, 2019

Invertebrate Systematics, 2018