Relevant bibliographies by topics / Sea urchins – Hawaii

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  2. Dissertations / Theses

Academic literature on the topic 'Sea urchins – Hawaii'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Sea urchins – Hawaii"

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Rahman, M. Aminur, Y. Arakaki, Sang-Go Lee, and Fatimah Md Yusoff. "Comparative fertilization and morphological studies of the recently speciated tropical sea urchins (Echinometra spp.) on the coral reefs of Okinawa and Hawaii." Journal of Environmental Biology 39, no. 5(SI) (September 15, 2018): 825–34. http://dx.doi.org/10.22438/jeb/39/5(si)/14.

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2

Rahman, M. Aminur, Fatimah Md Yusoff, A. Arshad, and Tsuyoshi Uehara. "Effects of Delayed Metamorphosis on Larval Survival, Metamorphosis, and Juvenile Performance of Four Closely Related Species of Tropical Sea Urchins (GenusEchinometra)." Scientific World Journal 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/918028.

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We report here, the effects of extended competency on larval survival, metamorphosis, and postlarval juvenile growth of four closely related species of tropical sea urchins,Echinometrasp. A (Ea),E. mathaei(Em),Echinometrasp. C (Ec), andE. oblonga(Eo). Planktotrophic larvae of all four species fed on cultured phytoplankton (Chaetoceros gracilis) attained metamorphic competence within 22–24 days after fertilization. Competent larvae were forced to delay metamorphosis for up to 5 months by preventing them from settling in culture bottles with continuous stirring on a set of 10 rpm rotating rollers and larval survival per monthly intervals was recorded. Larval survival was highest at 24 days, when competence was attained (0 delayed period), and there were no significant differences among the four species. Larvae that had experienced a prolonged delay had reduced survival rate, metamorphosis success, and juvenile survival, but among older larvae, Em had the highest success followed by Ea, Eo, and Ec. Juveniles from larvae of all four species that metamorphosed soon after becoming competent tended to have higher growth rates (test diameter and length of spines) than juveniles from larvae that metamorphosed after a prolonged period of competence with progressively slower growth the longer the prolonged period. Despite the adverse effects of delaying metamorphosis on growth parameters, competent larvae of all four species were able to survive up to 5 months and after metamorphosis grew into 1-month-old juveniles in lab condition. Overall, delayed larvae of Em showed significantly higher larval survival, metamorphosis, and juvenile survival than Ea and Eo, while Ec showed the lowest values in these performances. Em has the most widespread distribution of these species ranging from Africa to Hawaii, while Ec probably has the most restricted distribution. Consequently, differences in distribution may be related to differences in the ability to delay metamorphosis.
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3

Neilson, Brian J., Christopher B. Wall, Frank T. Mancini, and Catherine A. Gewecke. "Herbivore biocontrol and manual removal successfully reduce invasive macroalgae on coral reefs." PeerJ 6 (August 8, 2018): e5332. http://dx.doi.org/10.7717/peerj.5332.

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Invasive macroalgae pose a serious threat to coral reef biodiversity by monopolizing reef habitats, competing with native species, and directly overgrowing, and smothering reef corals. Several invasive macroalgae (Eucheuma clade E, Kappaphycus clade A and B, Gracilaria salicornia, and Acanthophora spicifera) are established within Kāne‘ohe Bay (O‘ahu, Hawai‘i, USA), and reducing invasive macroalgae cover is a coral reef conservation and management priority. Invasive macroalgae control techniques, however, are limited and few successful large-scale applications exist. Therefore, a two-tiered invasive macroalgae control approach was designed, where first, divers manually remove invasive macroalgae (Eucheuma and Kappaphycus) aided by an underwater vacuum system (“The Super Sucker”). Second, hatchery-raised juvenile sea urchins (Tripneustes gratilla), were outplanted to graze and control invasive macroalgae regrowth. To test the effectiveness of this approach in a natural reef ecosystem, four discrete patch reefs with high invasive macroalgae cover (15–26%) were selected, and macroalgae removal plus urchin biocontrol (treatment reefs, n = 2), or no treatment (control reefs, n = 2), was applied at the patch reef-scale. In applying the invasive macroalgae treatment, the control effort manually removed ∼19,000 kg of invasive macroalgae and ∼99,000 juvenile sea urchins were outplanted across to two patch reefs, totaling ∼24,000 m2 of reef area. Changes in benthic cover were monitored over 2 years (five sampling periods) before-and-after the treatment was applied. Over the study period, removal and biocontrol reduced invasive macroalgae cover by 85% at treatment reefs. Our results show manual removal in combination with hatchery raised urchin biocontrol to be an effective management approach in controlling invasive macroalgae at reef-wide spatial scales and temporal scales of months to years.
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4

Johnson, Darren W., and Marla E. Ranelletti. "Natural spawning of a Hawaiian sea urchin,Tripneustes gratilla." Invertebrate Biology 136, no. 1 (February 11, 2017): 31–36. http://dx.doi.org/10.1111/ivb.12158.

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5

SIMMEN, FRANK A., GREGORY J. DOLECKI, RUBEN CARLOS, MORTON MANDEL, and TOM HUMPHREYS. "Structural Analysis of Ribosomal RNA Genes from the Hawaiian Sea Urchin Species, Tripneustes gratilla." DNA 4, no. 5 (October 1985): 385–93. http://dx.doi.org/10.1089/dna.1985.4.385.

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6

Simmen, Frank A., Morton Mandel, and Tom Humphreys. "Length and sequence polymorphisms in the ribosomal gene spacer of the Hawaiian sea urchin, T. gratilla." Biochemical and Biophysical Research Communications 137, no. 2 (June 1986): 834–40. http://dx.doi.org/10.1016/0006-291x(86)91155-1.

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7

Rosenthal, E. T., and L. Wordeman. "A protein similar to the 67 kDa laminin binding protein and p40 is probably a component of the translational machinery in Urechis caupo oocytes and embryos." Journal of Cell Science 108, no. 1 (January 1, 1995): 245–56. http://dx.doi.org/10.1242/jcs.108.1.245.

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Oocytes of the echiuroid, Urechis caupo, contain an abundant maternal mRNA that encodes a protein very similar to LBP/p40, originally identified as a non-integrin 67 kDa laminin binding protein. We have sequenced the Urechis caupo mRNA for LBP/p40, and a similar mRNA from the Hawaiian sea urchin, Tripneustes gratilla. Both of the encoded proteins, as well as LBP/p40 proteins from other sources, share significant homology in the amino 2/3 of the proteins, but diverge extensively at the carboxyl ends. LBP/p40 protein is present in growing and in full-grown U. caupo oocytes. The protein concentration remains constant for the first 48 hours of embryogenesis and then begins to decline. In sucrose gradients run with homogenates from coelomocytes, oocytes, and early embryos, all of the LBP/p40 protein appears to be associated with either polysomes or free 40 S ribosomal subunits. In later embryos, an increasing proportion of the protein is found in the soluble fraction. Immunohistochemistry indicates that LBP/p40 is uniformly distributed in early U. caupo embryos, with no localization at the cell surface. In later embryos LBP/p40 is localized in specific parts of the embryo which may correspond to neural tissue.
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8

Morgan, Nicole B., and Amy R. Baco. "Observation of a high abundance aggregation of the deep-sea urchin Chaetodiadema pallidum A. Agassiz and H.L. Clark, 1907 on the Northwestern Hawaiian Island Mokumanamana." Deep Sea Research Part I: Oceanographic Research Papers 150 (August 2019): 103067. http://dx.doi.org/10.1016/j.dsr.2019.06.013.

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Dissertations / Theses on the topic "Sea urchins – Hawaii"

1

Cunha, Tamar B. Saturen. "The impact of transplanted sea urchins on alien and native flora." Thesis, 2006. http://hdl.handle.net/10125/20934.

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