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6 resultados encontrados para: AUTOR: Haddock, Steven H. D.
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Resumen en: Inglés |
Resumen en inglés

Since its founding, the Monterey Bay Aquarium Research Institute (MBARI) has pioneered unique capabilities for accessing the deep ocean and its inhabitants through focused peer relationships between scientists and engineers. This focus has enabled breakthroughs in our understanding of life in the sea, leading to fundamental advances in describing the biology and the ecology of open-ocean and deep-sea animals. David Packard’s founding principle was the application of technological advances to studying the deep ocean, in part because he recognized the critical importance of this habitat in a global context. Among other fields, MBARI’s science has benefited from applying novel methodologies in molecular biology and genetics, imaging systems, and in situ observations. These technologies have allowed MBARI’s bioluminescence and biodiversity laboratory and worldwide collaborators to address centuries-old questions related to the biodiversity, behavior, and bio-optical properties of organisms living in the water column, from the surface into the deep sea. Many of the most interesting of these phenomena are in the midwater domain—the vast region of ocean between the sunlit surface waters and the deep seafloor.


2.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
The rare deep-living hyperiid amphipod Megalanceoloides remipes (Barnard, 1932): complementary description and symbiosis
Gasca, Rebeca ; Haddock, Steven H. D. (coaut.) ;
Contenido en: Zootaxa Vol. 4178, no. 1 (Oct. 2016), p. 138–144 ISBN:1175-5334
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

A female ovigerous specimen of the rare deep-living hyperiid Megalanceoloides remipes (Barnard, 1932) was collected with a remotely operated submersible (ROV) at a depth of 2,094 m in the Farallon Basin, Gulf of California. The specimen was found to be symbiotically associated with the siphonophore Apolemia sp. Eschscholtz, 1829. Hitherto, this species was known only from two other specimens, one from the South Atlantic and another from the Indian Ocean; the present record is the first from the Pacific Ocean. Previous descriptions lacked morphological details of different appendages; these data are provided here. In addition, we present the first data on its symbiotic association from in situ observations. The colors of the hyperiid and of some parts of the Apolemid were very similar, thus supporting the notion that some hyperiids tend to mimic the color of its host.


3.
- Artículo con arbitraje
New symbiotic associations of Hyperiid amphipods (Peracarida) with gelatinous zooplankton in deep waters off California
Gasca, Rebeca ; Hoover, Rebecca (coaut.) ; Haddock, Steven H. D. (coaut.) ;
Contenido en: Journal of the Marine Biological Association of the United Kingdom Vol. 95, no. 3 (May 2015), p. 503–511 ISSN: 0025-3154
Resumen en: Inglés |
Resumen en inglés

Hyperiid amphipods are holoplanktonic marine crustaceans that are known as temporary symbionts of different groups of gelatinous zooplankton. The nature and dynamics of these associations are still poorly understood, particularly in deep waters. The mesopelagic and deep-living planktonic fauna off Monterey Bay, California (down to 4000 m) was surveyed using a remotely operated submersible (ROV) and blue-water diving (BWD) between September 2005 and January 2008. In this work we report our observations on a total of 51 symbiotic associations observed in situ (not from zooplankton samples), between hyperiid amphipods and various taxa of gelatinous zooplankton. We present the first information on the symbiotic relations of the hyperiid Vibilia caeca, and we provide data of 34 previously unknown symbiotic associations. The host range was expanded for several widely distributed hyperiid species. These findings suggest that the symbiotic associations between hyperiid amphipods and gelatinous zooplankton in deep waters deserve further study worldwide.


4.
- Artículo con arbitraje
Sapphirina iris dana, 1849 and S. Sinuicauda brady, 1883 (Copepoda, cyclopoida): predators of salps in Monterey bay and the Gulf of California
Gasca, Rebeca ; Suárez Morales, Eduardo (coaut.) ; Haddock, Steven H. D. (coaut.) ;
Contenido en: Crustaceana Vol. 88, no. 6 (April 2015), p. 689-699 ISSN: 0011-216X
Resumen en español

Las especies de copépodos del género Sapphirina Thompson, 1829 son consideradas depredadores especializados en salpas. Hay sólo pocos registros documentados de esos copépodos encontrados dentro de sus presas. Durante dos cruceros del B/O “Western Flyer” de MBARI (Monterey Bay Aquarium Research Institute), se utilizó el buceo SCUBA para recolectar zooplancton en la Bahía Monterey y en el Golfo de California. Una hembra ovígera de Sapphirina iris Dana, 1849 y un macho de S. sinuicauda Brady, 1883 fueron recolectados dentro de Pegea confoederata (Forskål, 1775). Se encontraron también dos hembras adultas de S. iris en Pegea socia (Bosc, 1802), ambas cerca de las horadaciones que hicieron para entrar al cuerpo de la salpa. Este es el primer registro documentado de la asociación involucrando a esos safirínidos habitando en sus presas. El elevado número de huevos de la hembra de S. iris apoya la idea de que los safirínidos tienen mayor fecundidad que otras especies de copépodos pláncticos, lo que es una estrategia adaptativa a su modo de vida. El hallazgo del macho de S. sinuicauda adherido al interior de la salpa difiere de observaciones previas del comportamiento de los safirínidos machos.

Resumen en inglés

Species of the copepod genus Sapphirina Thompson, 1829 are deemed as specialized predators of salps. There are only a few documented records of such copepods actually found within their prey. During two cruises of the R/V “Western Flyer” of MBARI (Monterey Bay Aquarium Research Institute), SCUBA diving was used to sample the zooplankton in Monterey Bay and the Gulf of California. An ovigerous female of Sapphirina iris Dana, 1849 and a male of S. sinuicauda Brady, 1883 were collected inside aggregate zooids of the salp Pegea confoederata (Forskål, 1775). Also, two adult females of S. iris were recorded inside P. socia (Bosc, 1802); both were lodged near the orifices they made to enter the salp’s body. This is the first documented record of the association involving these sapphirinid copepods lodged in their prey. The high number of eggs of the female S. iris supports the suggestion that sapphirinids have a higher fecundity than that of other planktonic copepods, an adaptive strategy related to their mode of life. The find of the male S. sinuicauda attached inside the salp differs from earlier observations on the behaviour of sapphirinid males.


5.
Artículo
Symbiotic associations between crustaceans and gelatinous zooplankton in deep and surface waters off California
Gasca, Rebeca ; Suárez Morales, Eduardo (coaut.) ; Haddock, Steven H. D (coaut.) ;
Contenido en: Marine Biology Vol. 151, no. 1 (2006), p. 233-242 ISSN: 0025-3162
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Resumen en: Inglés |
Resumen en inglés

Using a remotely operated submersible (ROV) in the sea off Monterey, California, we collected deep-living zooplankton and observed their associations with crustacean symbionts. Little is known about the nature of these symbioses. Among the most interesting findings was the description of a previously unknown modality of symbiosis of the deep-living copepod Pseudolubbockia dilatata Sars. It was recorded within the subumbrellar cavity of three specimens of the bathypelagic hydromedusa Aegina citrea Eschscholtz at depths of 606–1,098 m. One of these medusae hosted a mating pair of adult copepods along with the remains of their molts corresponding to copepodid stages CV of the female and CII, CIII, CIV, and CV of the male; another medusa had an adult female, and molts of a female CV and of male CIII, CIV and CV copepodids. Our data indicate that the medusae were occupied first by an early male copepodid, and then the female joined as a CV. The presence of an adult female alone with its CV molt in a third medusa suggests that females invade the host regardless of the presence of the male in it.

The medusa represents a protected environment for these copepods during vulnerable stages or processes (molting and mating). We also observed 13 new associations between hyperiid amphipods and gelatinous zooplankton at different depths. These involve four new records among members of the Infraorder Physosomata, for which only six other associations were known, and five species of amphipods and six hosts among the gelatinous zooplankton not previously recorded as symbionts. Data are provided on three families of Hyperiidea for which symbiotic associations were hitherto unknown. The ROV represents a valuable tool for the observation and sampling of these associations, whose existence has been known for a long time, but which are still poorly understood.


6.
Artículo
*En hemeroteca, SIBE-Villahermosa
Associations between gelatinous zooplankton and hyperiid amphipods (Crustacea: Peracarida) in the Gulf of California
Gasca, Rebeca ; Haddock, Steven H. D. (coaut.) ;
Clasificación: AR/592 / G3
Contenido en: Hydrobiologia Vol. 530/531, no. 1-3 (2004), p. 529-535 ISSN: 0018-8158
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
45948-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Villahermosa
Resumen en: Inglés |
Resumen en inglés

Hyperiid amphipods are pelagic crustaceans that live associated with gelatinous zooplankton including medusae, ctenophores, siphonophores, and salps. Standard plankton sampling disrupts natural associations, so the most reliable way to determine an association is through direct observation of the organisms in their environment. The planktonic fauna of the Gulf of California dwelling between 10 and 3000 m was surveyed using SCUBA diving and a remotely operated submersible (ROV) during March 2003. Here we report our observations on a total of 14 symbiotic associations found between the hyperiid amphipods and various taxa of gelatinous zooplankton. We found parental care behavior in a group of amphipods (Oxycephalidae) in which this phenomenon has not been previously reported. For two hyperiid species, Euthamneus rostratus and Vibilia australis, we present the first information on their symbiotic relations. Additional hosts were discovered for other well-known and widely distributed hyperiid species (i.e. Brachyscelus crusculum, Hyperoche medusarum). Photographic evidence of some of these interactions is included in this contribution. This is the first survey of these relationships in the Gulf of California, and many aspects of the ecology and biology of these symbioses remain to be studied.