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251 results for “Palau”
Population structure of giant clams (sub-family: Tridacninae) across Palau: implications for conservation
<p>Giant clams (Sub-family: Tridacninae) are an important food and economic resource for the Republic of Palau. Previous surveys of giant clams conducted over 20 years ago found diverse, localized populations across Helen Reef and the Rock Islands Southern Lagoon. This study updates population structure data for Palauan giant clams and investigates the impacts of conservation on these important bivalves. We surveyed eleven sites within fringing, barrier, atoll, and oceanic reefs across the Palauan archipelago (total area = 1650m<sup>2</sup>). A total of 831 clams were measured across seven species (<i>Tridacna crocea, T. maxima, T. noae, T. squamosa, T. derasa, T. gigas, </i>and <i>Hippopus hippopus</i>). In addition, this is the first documented case of <i>T. noae</i> in Palau. Our measurements show that giant clams in Palau are among the most abundant and densely distributed compared to other Indo-Pacific reefs. <i>T. crocea </i>exhibited the highest abundance (521 individuals) and density (20.0 ± 2.9 per 50m<sup>2</sup>) of all species in this survey. However, high demand from local and international markets may have resulted in low average shell lengths and reduced abundances of adult clams within the most abundant species: <i>T. crocea, T. maxima, </i>and <i>T. squamosa</i>. Despite these harvesting pressures, Palau's incorporation of bottom-up traditional and modern conservation initiatives has positively impacted <i>T. crocea</i>, the most targeted species by local fishers. Within the Ngermedellim Marine Sanctuary, <i>T. crocea </i>exhibit high abundances of recruits and adults, suggesting that protection from fishing has increased replenishment rates and reduced mortality within this conservation area. As these bivalves continue to be exploited, we suggest that continued protection of and the implementation of size-limits will enable giant clams to remain abundant and diverse in Palau.</p>
Ozone sonde and radio sonde data record Palau Atmospheric Observatory 2016-2021
<p>The Palau Atmospheric Observatory (PAO) balloon-borne ozonesonde and radiosonde database V1.0 provides raw data and calculated properties of Electrochemical Concentration Cell (ECC) ozonesonde measurements in .csv format from the PAO located in Koror, Palau (7.3420° N, 134.4722° E), in the Tropical West Pacific (TWP) from 2016-2021. The ECC sondes manufactured by Science Pump Corp. (SPC), model 6A, where prepared according to standard operating procedures (SOP) (Smit et al. 2014, for more details, see references and related publications). The accompanying radiosonde are Vaisala model RS92-SGP until October 2017 and RS41-SGP afterwards.The data are calculated from raw Vaisala software output using equations and tables according to Smit et al. 2014 (script available upon request) and include e.g. ozone volume mixing ratio and partial pressure for different background current corrections, which are of relevance in the low tropospheric ozone measurement in the TWP. No additional data smoothing has been applied to the Vaisala output, but beware that the change of radiosonde models was accompanied by software changes.</p> <p>We advise<strong> caution with using the stratospheric data</strong> for e.g. total column ozone assessment, as there were some discrepancies between individual soundings and MLS measurements (details, see related publications).</p> <p>The Palau ECC record is currently being continued and will be available in the SHADOZ database in SHADOZ standard format in the near future, which will be linked here.</p> <p><strong>Please email katrin.mueller@awi.de and let us know what your intended purpose for the use of the data is. You will then receive updates if an improved version becomes available.</strong></p>
Desconsol. Palau de la Generalitat
Desconsol sculpture kept in the patio of the Palau de la Generalitat in Barcelona. The author is Josep Llimona and this sculpture was so popular that there are several copies of the same motive in Catalonia. Just a really fast capture while working there scanning one of the main halls. Processed with Trnio Plus. I must edit the raw files to get a better texture. Source: Objaverse 1.0 / Sketchfab
Population structure of giant clams (sub-family: Tridacninae) across Palau: implications for conservation
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Data from: Population genetic structure between Yap and Palau for the coral Acropora hyacinthus
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Subspecies and Distribution. E. s. semicaudata Peale, 1848 - Samoa (Savai'i and Upolu Is), American Samoa (Ta'u Is), Fiji (Rotuma, Kuata in Yusawa Group, Taveuni, Ovalau, and Lakeba Is), and Tonga (Niuafo'ou and 'Eua Is, and likely occurs on other islands in the group). Not recorded in Tutuila (American Samoa) since 1976 despite dedicated searches for cave roosts and use of echolocation detectors and also likely extinct on Vitu Levu (Fiji) where the last specimens were collected in 1979. E. s. palauensis Yamashima, 1932 - Palau Is (including Babeldaob, Koror, Peleliu, and Angaur). E. s. rotensis Yamashima, 1943 - Northern Mariana Is and Guam I, last surviving population is currently restricted to tiny Aguigan I; it appears to be extirpated on Anatahan, Tonowas, Rota, Saipan, and Tinian Is, and on Guam I. E. s. sulcataG. S. Miller, 1911 — Caroline Is (Chuuk and Pohnpei Is). in Emballonuridae
Subspecies and Distribution. E. s. semicaudata Peale, 1848 - Samoa (Savai'i and Upolu Is), American Samoa (Ta'u Is), Fiji (Rotuma, Kuata in Yusawa Group, Taveuni, Ovalau, and Lakeba Is), and Tonga (Niuafo'ou and 'Eua Is, and likely occurs on other islands in the group). Not recorded in Tutuila (American Samoa) since 1976 despite dedicated searches for cave roosts and use of echolocation detectors and also likely extinct on Vitu Levu (Fiji) where the last specimens were collected in 1979. E. s. palauensis Yamashima, 1932 - Palau Is (including Babeldaob, Koror, Peleliu, and Angaur). E. s. rotensis Yamashima, 1943 - Northern Mariana Is and Guam I, last surviving population is currently restricted to tiny Aguigan I; it appears to be extirpated on Anatahan, Tonowas, Rota, Saipan, and Tinian Is, and on Guam I. E. s. sulcataG. S. Miller, 1911 — Caroline Is (Chuuk and Pohnpei Is).
FIGURE 2 in On the occurrence of Parasesarma cricotum (Rahayu & Davie, 2002) (Decapoda, Brachyura, Sesarmidae) in Palau and Sulawesi
FIGURE 2. Phylogenetic consensus tree constructed with Maximum Likelihood based on 639 basepairs of the COX1 gene, focusing on Parasesarma cricotum and allies and with P. brevicristatum as outgroup (only bootstrap values higher than 50% for ML are shown).
FIGURE 1 in On the occurrence of Parasesarma cricotum (Rahayu & Davie, 2002) (Decapoda, Brachyura, Sesarmidae) in Palau and Sulawesi
FIGURE 1. Parasesarma cricotum (ZRC 2000.1727), Sulawesi, Indonesia. A–B, male (22.6 × 19.7), A, dorsal habitus; B, chelar dactylar proximal tubercles, dorsal view; C–D, female (21.2 × 17.5), C, dorsal habitus; D, vulvae.
Sedimentation and overfishing drive changes in early succession and coral recruitment (Palau, Micronesia)
<p class="Default"><span>Sedimentation and overfishing are important local stressors on coral reefs that can independently result in declines in coral recruitment and shifts to algal dominated states. However, the role of herbivory in driving recovery across environmental gradients is often unclear. Here we investigate early successional benthic communities and coral recruitment across a sediment gradient in Palau, Micronesia over a 12-month period. Total sedimentation rates measured by 'TurfPods' varied from 0.03 ± 0.1 SE mg cm<sup>-2</sup> day<sup>-1</sup> at offshore sites to 1.32 ± 0.2 mg cm<sup>-2</sup> day<sup>-1</sup> at inshore sites. To assess benthic succession, three-dimensional settlement tiles were deployed at sites with experimental cages used to exclude tile access to larger herbivorous fish. Benthic assemblages exhibited rapid transitions across the sediment gradient within 3 months of deployment. At low levels of sedimentation (< 0.6 mg cm<sup>-2</sup> day<sup>-1</sup>), herbivory resulted in communities dominated by coral recruitment inducers (short turf algae and crustose coralline algae), whereas exclusion of herbivores resulted in the overgrowth of coral inhibitors (encrusting and upright foliose macroalgae). An "inducer threshold" was found under increasing levels of sedimentation (> 0.6 mg cm<sup>-2</sup> day<sup>-1</sup>), with coral inducers having limited to no presence in communities, and herbivore access to tiles resulted in sediment-laden turf algal assemblages, while exclusion of herbivores resulted in invertebrates (sponges, ascidians) and terrestrial sediment accumulation. A "coral recruitment threshold" was found at 0.8 mg cm<sup>-2</sup> day<sup>-1</sup>, below which net coral recruitment was reduced by 50% in the absence of herbivores, while recruitment was minimal above the threshold. Our results highlight non-linear trajectories of benthic succession across sediment gradients and identify strong interactions between sediment and herbivory that have cascading effects on coral recruitment. Local management strategies that aim to reduce sedimentation and turbidity and manage herbivore fisheries can have measurable effects on benthic community succession and coral recruitment, enhancing reef resilience and driving coral recovery.</span></p>
FIGURE 1 in A new species of mud shrimp of the genus Espeleonaushonia Juarrero & Martínez-Iglesias, 1997 (Decapoda: Gebiidea: Laomediidae) from Palau
FIGURE 1. Espeleonaushonia palauensis sp. nov., female holotype: a, complete dorsal view; b, total lateral view. Scale bar = 5 mm.
FIGURE 2 in A new species of mud shrimp of the genus Espeleonaushonia Juarrero & Martínez-Iglesias, 1997 (Decapoda: Gebiidea: Laomediidae) from Palau
FIGURE 2. Espeleonaushonia palauensis sp. nov., female holotype: a, dorsal view of carapace; b, telson and left rami of uropods, dorsal view; c, first pereopod, dorsal face; d, third maxilliped; e, second to fifth pereopods, lateral view; f, eye, lateral view. Scale bars = a, 5 mm; b, c, e, 2 mm; d, f, 1 mm.
FIGURE 3 in A new species of mud shrimp of the genus Espeleonaushonia Juarrero & Martínez-Iglesias, 1997 (Decapoda: Gebiidea: Laomediidae) from Palau
FIGURE 3. Espeleonaushonia palauensis sp. nov., female holotype: a, antennal scale, dorsal view; b, maxillule; c, mandible; d, detail of basal articles of antenna, ventral view; e, maxilla; f, first maxilliped; g, second maxilliped. Scale bars = 1 mm.
FIGURE 4 in Pinnotherotonia rumphiusi gen. et sp. nov., a new furry bivalve-associated pontoniine shrimp (Crustacea: Decapoda: Palaemonidae) from Palau
FIGURE 4. Pinnotherotonia rumphiusi gen. et sp. nov., holotype. A, B, mandible; C, same, distal margin of the incisor process; D, maxillula; E, same, palp; F, maxilla; G, first maxilliped; H, second maxilliped; I, third maxilliped. Scale = 1 mm.
FIGURE 3 in Pinnotherotonia rumphiusi gen. et sp. nov., a new furry bivalve-associated pontoniine shrimp (Crustacea: Decapoda: Palaemonidae) from Palau
FIGURE 3. Pinnotherotonia rumphiusi gen. et sp. nov., holotype. A, rostrum; B, telson and uropods; C, telson; D, same, distal margin; E, lateral margin of exopod of uropods; F, same, distolateral margin; G, H, antennule; I, J, antenna. Scale =1 mm.
FIGURE 6 in Pinnotherotonia rumphiusi gen. et sp. nov., a new furry bivalve-associated pontoniine shrimp (Crustacea: Decapoda: Palaemonidae) from Palau
FIGURE 6. Pinnotherotonia rumphiusi gen. et sp. nov., holotype. A, dactylus of third pereiopod; B, dactylus of fourth pereiopod; C, same, main unguis. Scale =1 mm.
FIGURE 2 in Pinnotherotonia rumphiusi gen. et sp. nov., a new furry bivalve-associated pontoniine shrimp (Crustacea: Decapoda: Palaemonidae) from Palau
FIGURE 2. Pinnotherotonia rumphiusi gen. et sp. nov., holotype. A, B, carapace; C, D, front of carapace; E, front of carapace, ventral view; F, eyes. Scale = 1 mm.
FIGURE 5 in Pinnotherotonia rumphiusi gen. et sp. nov., a new furry bivalve-associated pontoniine shrimp (Crustacea: Decapoda: Palaemonidae) from Palau
FIGURE 5. Pinnotherotonia rumphiusi gen. et sp. nov., holotype. A, first pereiopod; B, C, same, chela; D, second pereiopod; E, same, chela; F, same, fingers; G, third pereiopod. Scale = 1 mm.
FIGURE 7 in Pinnotherotonia rumphiusi gen. et sp. nov., a new furry bivalve-associated pontoniine shrimp (Crustacea: Decapoda: Palaemonidae) from Palau
FIGURE 7. Holotype female of Pinnotherotonia rumphiusi gen. et sp. nov. on the mantle of the host shell Periglypta crispata.
FIGURE 5 in Amphipoda (Crustacea) from Palau, Micronesia: Families Melphidippidae, Oedicerotidae, Photidae, Pleustidae, Podoceridae, Stenothoidae, Synopiidae and Talitridae
FIGURE 5. Latigammaropsis akhenateni sp. nov., male, holotype, 4.5 mm, female paratype, 5.0 mm, Seabear Site, Palau.
FIGURE 5 in Bayerotrochus delicatus, a new species of pleurotomariid from Yap Seamount, near Palau, Western Pacific (Gastropoda: Pleurotomariidae)
FIGURE 5. Neighbour-joining tree for Pleurotomariidae based on available COI sequences from this study and GenBank. Numbers above branches indicate the bootstrap values.
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Allen Brain Atlas
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