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4,028 results for “shrimps”
Fig. 2 in A New Species of the Ghost Shrimp Family Ctenochelidae (Crustacea: Decapoda: Axiidea) from Japan
Fig. 2. Ctenocheloides nomurai sp. nov., holotype, male (cl 7.3 mm), CBM-ZC 11250. A, carapace and cephalic appendages, dorsal view; B, first and second pleomere, dorsal view; C, third to sixth pleomeres, dorsal view (lateral setae omitted from right side); D, telson and uropods, dorsal view (marginal setae on uropod omitted); E, coxae of third to fifth pereopods and thoracic sternum, ventral view (setae omitted). Scale bars: 2 mm for A–D; 1 mm for E.
Fig. 1 in A New Species of the Ghost Shrimp Family Ctenochelidae (Crustacea: Decapoda: Axiidea) from Japan
Fig. 1. Ctenocheloides nomurai sp. nov., holotype, male (cl 7.3 mm), CBM-ZC 11250. A, cephalothorax and cephalic appendages, lateral view (thoracic appendages removed); B, pleon and pleopods, lateral view (setae partially omitted). Scale bar: 2 mm.
Fig. 5 in A New Species of the Ghost Shrimp Family Ctenochelidae (Crustacea: Decapoda: Axiidea) from Japan
Fig. 5. Ctenocheloides nomurai sp. nov., holotype, male (cl 7.3 mm), CBM-ZC 11250. A, left cheliped, lateral view; B, same, mesial view; C, right cheliped, lateral view; D, same, close up of fingers, lateral view. Scale bars: 2 mm for A–C; 1 mm for D.
Critical thermal maximum of male and female ditch shrimps (Palaemon varians) [dataset].
<p>Dataset on the upper thermal tolerance limits (Critical Thermal Maximum, CTmax) of male and female<em> Palaemon varians</em> shrimps collected from the salt pan complex of Marinha de Santiago da Fonte, Ria de Aveiro, Portugal (40 ̊ 37’44.5’’N, 08 ̊ 39’37.3’’W). Data on weight and lenght are also included. Temperature data for the sampling site were collected with a HOBO datalogger (water Temp Pro v2 U22-001, Onset, USA) and are also included. </p> <p>Dataset associated to the article <a href="https://doi.org/10.1016/j.jtherbio.2021.103151">https://doi.org/10.1016/j.jtherbio.2021.103151</a></p>
Cultivation of the seaweed Ulva spp. with effluent from a shrimp biofloc rearing system: different species and stocking density
<p>This work evaluated the use of effluent from a marine shrimp biofloc rearing system to cultivate the green seaweed <em>Ulva</em>. First, the growth of two <em>Ulva </em>species, <em>U. ohnoi</em> and <em>U. fasciata,</em> was evaluated. Second, the best-performing species was cultivated under two different stocking densities (2 g L<sup>-1</sup> and 4 g L<sup>-1</sup>) to evaluate both growth and nutrient uptake rates, considering total ammonia nitrogen, nitrate, and orthophosphate. In both cases, environmental variables were monitored, and the cultivation medium, consisting of 25% biofloc water and 75% seawater, was exchanged weekly. <em>U. ohnoi</em> grew significantly better, considering all variables evaluated (<em>p</em><0.05). The smaller stocking density produced a higher specific growth rate (<em>p</em><0.05). Yield, however, was unaffected (<em>p</em>≥0.05). No significant differences in the nutrient uptake rates were observed (<em>p</em>≥0.05). Overall, this work highlights the importance of species selection for seaweed destined for aquaculture. Additionally, it also optimizes the cultivation of seaweeds, specifically <em>U. ohnoi</em>, using effluent from biofloc systems.</p>
Weapon performance and contest assessment strategies of the cavitating snaps in snapping shrimp
<p class="MsoNormal">Animals compete in contests over limited resources. Contestants forfeit once they ascertain that their opponent has greater resource holding potential (RHP) (mutual assessment) or once they reach a threshold of costs (self assessment). Functional scaling studies of contest behavior performance can inform how assessment signals, offensive capacity, and endurance scale with RHP and thereby elucidate the mechanisms through which each of these assessment types operate. Here, we performed behavioral contest analyses to determine the assessment strategies used in snapping shrimp (<em>Alpheus heterochaelis</em>) contests. Then, we used biomechanical measurements of a common contest behavior to inform how assessment might operate. We were specifically interested in the snapping behavior during which snapping shrimp fire imploding cavitation bubbles – hereafter, "snaps" – at their opponents. We showed that <em>A. heterochaelis</em> use mutual assessment early in contests. Then, when they fire snaps, they switch to cumulative assessment – a type of self assessment where contestants endure costs from their own behaviors (e.g. energy) and their opponent's (e.g. injury). Because larger individuals tend to win contests, we then tested how the maximum performance and endurance of snaps scaled with size. We measured the average angular velocity of the snapping dactyl, cavitation bubble duration, and pressure of snaps as metrics of performance. We measured 10 snaps per individual (n = 76 individuals). From this series of 10 snaps, we calculated the maximum of each metric as the maximum performance and the attrition of each metric over the course of ten snaps as a measure of endurance. Maximum performance increased with size, but endurance did not. This suggests that cumulative assessment in snapping shrimp is driven by opponent-imposed costs. Our results are not consistent with self-assessment based on endurance; however, the experiment could not fully replicate the quick succession of snaps fired in real contests. Future experiments should better replicate the rapid firing of snaps to test if endurance matters in a more ecologically relevant context. Our framework of integrating biomechanics and behavioral ecology provide a pathway to identify precise mechanisms of contest assessment and animal behavior more broadly.</p>
Survival, wet weight and muscle cellular stress responses of Palaemon varians shrimps exposed to combined temperature and salinity variations
<p>Shrimps were exposed to a full factorial experiment combining different temperatures (20, 23 and 26 ºC) and salinities (20, 40). Cellular stress response biomarkers were assessed in the shrimps muscle at several time-points, namely the 7th, 14th, 21st and 28th days of exposure. Wet weight (as proxy for growth) and survival were also assessed during the experiment. These datasets refer to the publication of an article in STOTEN (<a href="https://doi.org/10.1016/j.scitotenv.2022.158732">https://doi.org/10.1016/j.scitotenv.2022.158732</a>).</p> <p>Note: the biomarker dataset contained 3.2% of missing values, which were replaced by group averages for the purpose of the statistical analyses in the article.</p>
Figure 9 in Revision of the Indo-West Pacific Coral Reef Mantis Shrimp Genus, Gonodactylopsis Manning, 1969 (Crustacea: Stomatopoda: Gonodactylidae)
Figure 9. Gonodactylopsis maqqaba sp. nov., holotype female, TL 16 mm, Macclesfield Bank, NTOU S00036. (A) anterior cephalothorax, dorsal view; (B) right eye, lateral view; (C) ocular scales; (D) rostral plate, lateral view; (E) right antenna, lateral view; (F) right raptorial claw, lateral view; (G) thoracic somites 6–8, right lateral view; (H) abdominal somite 6, telson and right uropod; (I) abdominal somites 5, 6 and telson, lateral view; (J) abdominal somites 4 and 5 posterolateral margin, lateral view; (K) right uropod, ventral view; (L) telson, ventral view. Scale = 1.0 mm.
Figure 8 in Revision of the Indo-West Pacific Coral Reef Mantis Shrimp Genus, Gonodactylopsis Manning, 1969 (Crustacea: Stomatopoda: Gonodactylidae)
Figure 8. Gonodactylopsis lata sp. nov., colour in life, female, TL 21 mm, Papua New Guinea, MNHN IU-2014-213. Photo: T.-Y. Chan.
Figure 6 in Revision of the Indo-West Pacific Coral Reef Mantis Shrimp Genus, Gonodactylopsis Manning, 1969 (Crustacea: Stomatopoda: Gonodactylidae)
Figure 6. Gonodactylopsis lata sp. nov.: A–J, holotype female, TL 22 mm, Fiji, VGS 82-9, USNM 307139; K–L, paratype male, TL 17 mm, Fiji, MUSORSTOM 10 CP1364, MNHN. (A) anterior cephalothorax, dorsal view; (B) right eye, lateral view; (C) ocular scales; (D) rostral plate, lateral view; (E) right antenna, lateral view; (F) right raptorial claw, lateral view; (G) thoracic somites 6–8, right lateral view; (H) abdominal somites 5 and 6, telson and right uropod; (I) abdominal somites 5, 6 and telson, lateral view; (J) right uropod, ventral view; (K) telson, dorsal view; (L) right pleopod 1 endopod, anterior view. Scale: A–K = 2.0 mm; L = 1.0 mm.
Figure 7 in Revision of the Indo-West Pacific Coral Reef Mantis Shrimp Genus, Gonodactylopsis Manning, 1969 (Crustacea: Stomatopoda: Gonodactylidae)
Figure 7. Gonodactylopsis lata sp. nov., telson outline, Papua New Guinea: (A) male, TL 10 mm, MNHN IU-2014-966; (B) female, TL 13 mm, MNHN IU-2014-965; (C) female, TL 15 mm, MNHN IU-2014-187; (D) male, TL 16 mm, AM P105858. Scale = 1.0 mm.
Figure 4 in Revision of the Indo-West Pacific Coral Reef Mantis Shrimp Genus, Gonodactylopsis Manning, 1969 (Crustacea: Stomatopoda: Gonodactylidae)
Figure 4. Gonodactylopsis drepanophora (De Man, 1902): A–J, female, TL 22 mm, Okinawa, Japan, USNM 307225; K, female, TL 18 mm, Ambon, Indonesia, USNM 155707. (A) anterior cephalothorax, dorsal view; (B) ocular scales; (C) right antenna, lateral view; (D) right raptorial claw, lateral view; (E) thoracic somites 6–8, lower right lateral view; (F) abdominal somite 6, telson and right uropod; (G) abdominal somites 4 and 5 posterolateral margin, lateral view; (H) right uropod, ventral view; (I) telson, right lateral view; (J) telson, ventral view; (K) telson, dorsal view. Scale = 1.0 mm.
Figure 2 in Revision of the Indo-West Pacific Coral Reef Mantis Shrimp Genus, Gonodactylopsis Manning, 1969 (Crustacea: Stomatopoda: Gonodactylidae)
Figure 2. Gonodactylopsis herdmani (Tattersall, 1906): A–K, lectotype female, TL 26 mm, Ceylon, NHM 1906.10.27.1; L, paralectotype female, TL 28 mm, Ceylon, NHM 1906.10.27.1. (A) anterior cephalothorax, dorsal view; (B) right eye, lateral view; (C) ocular scales; (D) rostral plate, lateral view; (E) right antenna, lateral view; (F) right raptorial claw, lateral view; (G) thoracic somites 6–8, right lateral view; (H) abdominal somite 5 and 6, telson and left uropod; (I) abdominal somites 5, 6 and telson, lateral view; (J) right uropod, ventral view; (K) telson, ventral view; (L) telson, dorsal view. Scale = 2.0 mm.
Figure 5 in Revision of the Indo-West Pacific Coral Reef Mantis Shrimp Genus, Gonodactylopsis Manning, 1969 (Crustacea: Stomatopoda: Gonodactylidae)
Figure 5. Gonodactylopsis komodoensis sp. nov.: A–L, male, TL 16 mm, Bunaken, Indonesia, AM P105857; M, male, TL 11 mm, Siladen Island, Indonesia, AM P105856; N, holotype female, TL 22 mm, Komodo, Indonesia, USNM 260914. (A) anterior cephalothorax, dorsal view; (B) right eye, lateral view; (C) ocular scales; (D) rostral plate, lateral view; (E) right antenna, lateral view; (F) right raptorial claw, lateral view; (G) thoracic somites 6–8, right lateral view; (H) abdominal somite 6, telson and right uropod; (I) abdominal somites 5, 6 and telson, lateral view; (J) right uropod, ventral view; (K) telson, ventral view; (L) right pleopod 1 endopod, anterior view; (M, N) telson, dorsal outline. Scale: A–K, M, N = 2.0 mm; L = 1.0 mm.
Figure 3 in Revision of the Indo-West Pacific Coral Reef Mantis Shrimp Genus, Gonodactylopsis Manning, 1969 (Crustacea: Stomatopoda: Gonodactylidae)
Figure 3. Gonodactylopsis drepanophora (De Man, 1902): A–H, holotype female, TL 19 mm, Ternate, Indonesia, SMF 5773; I–J, male, TL 12 mm, E Ashmore Reef, WAM C54274. (A) anterior cephalothorax, dorsal view; (B) ocular scales; (C) right antenna, lateral view; (D) right raptorial claw, lateral view; (E, I) abdominal somite 6, telson and right uropod; (F) telson, lateral view; (G) telson submedian and intermediate teeth, ventral view; (H) right uropod, ventral view; (J) right pleopod 1 endopod, anterior view. Scale: A–H = 1.0 mm, I = 0.8 mm, J = 0.4 mm.
Opposing life history strategies allow grass shrimp parasites to avoid a conflict of interest
<p>A conflict of interest occurs when parasites manipulate the behavior of their host in contradictory ways to achieve different goals. In grass shrimp (<em>Palaemonetes pugio</em>), trematode parasites that use shrimp as an intermediate host cause the shrimp to be more active than usual around predators, whereas bopyrid isopod parasites that use shrimp as a final host elicit the opposite response. Since these parasites are altering the host's behavior in opposing directions, a conflict of interest would occur in co-infected shrimp. Natural selection should favor attempts to resolve this conflict through avoidance, killing, or sabotage. In a field survey of shrimp populations in four tidal creeks in the Cape Fear River, we found a significant negative association between the two parasites. Parasite abundance was negatively correlated in differently sized hosts, suggesting avoidance as a mechanism. Subsequent mortality experiments showed no evidence of early death of co-infected hosts. In behavior trials, co-infected shrimp did not show significantly different behavior from singly infected or uninfected shrimp, suggesting that neither parasite sabotages the manipulation of the other. Taken together, our results suggest that rather than sabotaging or killing one another, bopyrid and trematode parasites tend to infect differently sized hosts, thus avoiding a conflict and confirming the importance of testing assumptions in natural contexts.</p>
FIGURE 1. A in Synonymy of the Caridean Shrimp Genus Paralatreutes Kemp, 1925 with Latreutes Stimpson, 1860 (Decapoda: Hippolytidae)
FIGURE 1. A, Latreutes bicornis (Kemp, 1925) (CASIZ 202665), dorsal view showing rostrum and anterior carapace. B, Same specimen, dorsal view showing abdomen and posterior pereopods.
Fig. 1 in Embryonic development of the ornamental shrimp, Urocaridella arabianensis Akash et al., 2020
Fig. 1 — Embryonic development of U. arabianensis: (a) Brooder animals; (b) Stage I - Fertilized eggs; (c) Stage II - Cleavage (Cv); (d) Stage III - Blastula; (e) Stage IV - Gastrula, Tp - Translucid area; (f) Stage V - Nauplius; (g) Stage VI - Post-Nauplius I; (h) Stage VII - Post-Nauplius II; (i) Stage VIII - Pre-hatching; and (j) Stage IX - Newly hatched larva (Zoea I). Scale bar: 0.5 mm
Fig 1 in Growth performance of shrimp Litopenaeus vannamei under different carbon: Nitrogen (C/N) ratios of Bioflocs system
Fig 1: Growth Performance details – final weight and weight gain recorded in L.vannamei under different C/N ratios
Fig 4 in Growth performance of shrimp Litopenaeus vannamei under different carbon: Nitrogen (C/N) ratios of Bioflocs system
Fig 4: Growth Performance details – productivity rate recorded in L.vannamei under different C/N ratios
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.