Zobrazeno 1 - 10 of 137 pro vyhledávání: '"John H. Himmelman"'
1
Akademický článek
Influence of environmental factors on the growth of the juvenile, maturing juvenile, and adult tropical scallop, Euvola ziczac (Pteroida: Pectinidae), in suspended culture conditions Influencia de los factores ambientales en el crecimiento de juveniles, juveniles con capacidad reproductiva y adultos de la vieira tropical Euvola ziczac (Pteroida: Pectinidae) en condiciones de cultivo suspendido
Autor: César Lodeiros, Luis Freites, Alfonso Maeda-Martínez, John H Himmelman
Publikováno v: Latin American Journal of Aquatic Research, Vol 40, Iss 1, Pp 53-62 (2012)
We carried out growth trials on three size groups of the scallop, Euvola ziczac, during two short-term (34-36 days) periods at 8, 21, and 34 m depth in Cariaco Gulf, Venezuela, in order to evaluate the effect of environmental factors on growth. Growt
Externí odkaz: https://doaj.org/article/a350650db67f4f00857f1e21c17132a0
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2
Akademický článek
Contribution of food availability to the more rapid growth of the scallop, Euvola ziczac (Pteroida, Pectinidae) in bottom than in suspended culture
Autor: Patrick Hunauld, Anibal Vélez, Noris Jordan, John H Himmelman, Francisco Morales, Luis Freites, César J Lodeiros
Publikováno v: Revista de Biología Tropical, Vol 53, Iss 3-4, Pp 455-461 (2005)
We conducted a 5-month experiment at Turpialito in the Golfo de Cariaco, Venezuela, to examine whether the previously reported more rapid growth of scallop Euvola ziczac in bottom compared to suspended culture can be attributed to more abundant or hi
Externí odkaz: https://doaj.org/article/7decddb7c7cf4b05b9b1610c28668d43
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3
Akademický článek
Reproductive cycle of the bivalve Lima scabra (Pterioida: Limidae) and its association with environmental conditions
Autor: César J. Lodeiros, John H. Himmelman
Publikováno v: Revista de Biología Tropical, Vol 47, Iss 3, Pp 411-418 (1999)
We examined the reproductive cycle of a tropical bivalve, the fire scallop Lima (Ctenoides) scabra (Born, 1778), over a 14 months period in the Golfo de Cariaco, Venezuela, and the association of gonadal growth and spawning with environmental factors
Externí odkaz: https://doaj.org/article/8a4f8f6b55b24ce1bab66d9e1f0d9fc7
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4
Effect of different predators on the escape response of Placopecten magellanicus
Autor: John H. Himmelman, Xavier Janssoone, Helga Guderley, Hernan Pérez Cortes, Isabelle Tremblay, Madeleine Nadeau
Publikováno v: Marine Biology. 162:1407-1415
To assess whether giant scallops, Placopecten magellanicus use distinct escape strategies to respond to their seastar and crustacean predators, escape responses to two major seastar predators, Asterias vulgaris and Leptasterias polaris, two seastars
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::001b6944edc2e44a0232f717d54491ec
https://doi.org/10.1007/s00227-015-2677-x
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6
Scallop Aquaculture and Fisheries in Venezuela
Autor: John H. Himmelman, Maximiano Núñez, José Alió, Luis Freites, César Lodeiros
This chapter discusses the biology, fishery and aquaculture of scallops in Venezuela. The Venezuelan coast, in the southwestern Caribbean Sea, is a tropical region that supports a high diversity of bivalve molluscs, including 10 species of scallops.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f182615eabac769b114db0881c54c50e
https://doi.org/10.1016/b978-0-444-62710-0.00027-4
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7
Sea urchin Tetrapygus niger distribution on elevated surfaces represents a strategy for avoiding predatory sea stars
Autor: Carlos F. Gaymer, John H. Himmelman, Juan Diego Urriago
Publikováno v: MARINE ECOLOGY PROGRESS SERIES
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
We ran field experiments to examine whether the micro-distribution of the sea urchin Tetrapygus niger on elevated surfaces represents a strategy for limiting predation by the sea stars Heliaster helianthus and Meyenaster gelatinosus. Several lines of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4fb282f9293747563179f3a3666f4b92
https://doi.org/10.3354/meps09396
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8
Responses of the black sea urchin Tetrapygus niger to its sea-star predators Heliaster helianthus and Meyenaster gelatinosus under field conditions
Autor: Carlos F. Gaymer, John H. Himmelman, Juan Diego Urriago
Publikováno v: JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
We ran field experiments to examine the responses of the black sea urchin Tetrapygus niger to predatory sea stars. Trials involving simulated attacks (one or several arms of a sea star being placed on top of half the urchin) showed that the urchin di
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d129b9990babe0800bb98aa91f5a6734
https://doi.org/10.1016/j.jembe.2011.01.004
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9
Factors determining the abundance, distribution and population size–structure of the penshellPinna carnea
Autor: John H. Himmelman, Serge Aucoin
Publikováno v: Journal of the Marine Biological Association of the United Kingdom. 91:593-606
Surveys conducted in the south-western Dominican Republic showed that the penshellPinna carneais a consistent component of seagrass beds and is absent in adjacent sandflats. Population densities were low (0.012–0.076·m−2) and the size–structur
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4ee260472dc08f583c397234d8fe5650
https://doi.org/10.1017/s0025315410001360
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10
Biomass–density relationships and self-thinning of blue mussels (Mytilus spp.) reared on self-regulated longlines
Autor: Marcel Fréchette, Gaétan Daigle, Myriam Lachance-Bernard, John H. Himmelman
Publikováno v: Aquaculture. 308:34-43
We describe the population dynamics of mussels that are allowed to grow on collectors, and focus on self-thinning which determines the upper limit to yield. We studied two longlines at two farms in Baie de Cascapedia, Quebec, and sampled collectors c
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a7b47b83d38e9833f02da2a6650741dd
https://doi.org/10.1016/j.aquaculture.2010.07.038
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